Interpret "National Catalogue of Hazardous Wastes", Regenerate WO3 Waste Denitration Catalyst

regenerate waste denitration catalystRecently, China has revised and promulgated the "National Catalogue of Hazardous Wastes" (version 2016), and will be taken effect on August 1st, 2016. In this revising, the 49 major categories 400 kinds of hazardous wastes of the 2008 edition of was adjusted to 46 major categories 479 kinds (362 kinds from the original catalogue, and 117 kinds added); wherein the primary organic solvents waste, waste halogenated organic solvents and waste organic solvent are combined into the waste organic solvents and waste solvent-containing, and removed the containing polychlorinated furans waste and containing polychlorinated dioxins, while increased the waste category of waste catalyst at the same time.
 
With the deeply controlling of Chinese air pollution, the using amount of the catalyst which is the core of SCR denitration system will be more and more, and that means more waste catalyst will be created. The current approach to handle the waste denitration catalyst is usually the landfill, incineration, recycling treatment; the recycling treatment can divided into directly regeneration and comprehensive recovery; directly regeneration will be able to save a lot of money for the company, because the total cost of the catalyst takes about 30% of the whole investment of denitration system. SCR DeNOx catalyst usually takes titanium dioxide as the carrier, vanadium pentoxide as the main active material, tungsten trioxide (WO3) as the co-catalyst which plays the roles of sulfur poisoning, anti-sintering of carrier ect.. Because vanadium pentoxide is a highly toxic substance, if it is discharged directly into the environment, it will bring a huge threat to the environmental protection, and also may cause damage to human bodies and animals; therefore, it is imperative for its regeneration and recycling.
 
The regeneration methods of WO3 waste denitration catalyst ate the online regeneration and plant regeneration, on-site regeneration is now not advocated, due to secondary pollution caused, and the not enough professional of the on-site personnel; and the plant regeneration is a regenerated way which promoted more, because the activity of the renew waste WO3 denitration catalyst can be greatly, and furthermore, with the more perfect of the entire treatment process, it will cause no secondary pollution.

 

Illegal Dumping Jailed in Yunnan, WO3 Photocatalyst Degrades Landfill Leachate

Not long ago, the first case of illegal dumping of landfill leachate and caused environmental pollution of Yunnan which has caused much concern has been adjudged; the defendant because of surrender and pleaded guilty with a good attitude, has jailed for 2 years and will respite for 2 years, also he was imposed a fine of 20,000 and do some service as a environment volunteer. It is reported that this case is because the defendant privately dumped his transportation of 29 cars which totaled 568.34 tons of pollutants into the environment, under the case of known the heavy metals, organic compounds should be transported to a special institution for professional treatment, and thus caused serious pollution to the surrounding environment. In this regard, the court verdict this case based on the principle of "spoiler repairs, polluter controls".

tungsten trioxide and landfill leachate
 
Landfill leachate is the high concentration of organic or inorganic ingredients liquid which generates from the landfill garbage piling up in the biochemical degradation process due to compaction, fermentation, etc., while in precipitation and groundwater seepage produces liquid comprising. In the biological pretreatment process, titanium dioxide photocatalyst has been used in the degradation of landfill leachate, and the experiments showed that this is a successful method for cleaning leachate. In addition, the experimental has derived the factors which influence photocatalytic oxidation process of landfill leachate, they are photocatalyst dosage, pH value, light intensity, illumination time and oxygen content dissolved in the water ect..
 
Tungsten trioxide (WO3), a yellow powder, the large number of it is used for the production of metal tungsten; in addition, WO3 has the property of semiconductor, with the band gap of 2.4eV ~ 2.8eV. WO3 as a photocatalyst can response to visible light, thus to fully use the solar energy, instead of relying on the ultraviolet light, such as titanium dioxide. Photocatalytic activity is a common decision of the ability of absorbing light, charge separation and the transferring efficiency to the substrate. WO3 has a wider spectral response capability, to this point of view, it should have a stronger catalytic oxidation than titanium dioxide, and can be used for landfill leachate degradation. In addition, studies have shown that yttrium (Y+) doped WO3 photocatalyst can improve the ability to absorb light, thus improve the photocatalytic activity of the system.

 

First "Botanical Garden" Sewage Treatment Plant Settled Shanghai, WO3 Photocatalyst Treats Industrial Waste Water

What is the sewage treatment plant looks like in your mind? Reinforced concrete sedimentation tanks, smelly, dirty, disorderly environment? No! The first "botanical garden" type sewage treatment plant will start to build and put into operation! Recently, it is reported that a "botanical garden" type sewage treatment plant has been built in the coast of Wu Song Shanghai, which introduced more than 3,000 species of plants and microorganisms, such as Datura flowers, Periwinkle, European alder, Canna, and is expected to be operational next year; by then , this botanical garden which uses the food chain reactor sewage treatment technology can not only improve the urban environment, but also can handle more than 40,000 cubic meters of polluted water for the urban residents every day.

nano photocatalyst network and botanical garden sewage treatment plant
 
Wet air oxidation method is proved to be an effective wastewater treatment technology, and already has been used in a large number of organic or polluted water containing toxic chemicals which the conventional biological treatment methods are not very effective; however, the strict reaction conditions cause the very expensive equipment and transportation costs, and therefore this method is rarely used in the treatment of organic industrial waste water. There has been a lot of research work on photocatalysis for the terms of general organic waste water treatment, foreign countries have large-scale photocatalytic degradation of organic wastewater and deeply processing experiments of drinking water, and furthermore Europe has been conducting experiments on photocatalytic purification of the river.
 
Tungsten trioxide (WO3) is the most common form of tungsten oxide, which is produced by controlling the appropriate reaction conditions, has the properties of electrochromic, gas sensitivity, semiconductor and so on. As one of semiconductor photocatalysts, WO3 can be used for the photocatalytic degradation of organic, dye and papermaking waste water; also it can be used to deal with inorganic pollution and inorganic synthesis; at the same time, it also plays an excellent effect on the photocatalytic decomposition of water to produce hydrogen. In addition, WO3photocatalyst plays an effective role in the treatment of organic phosphorus pesticide, dye wool and chlorinated organic compounds waste water ect..

 

6.5 Million Die for Air Pollution Yearly, Tungsten Trioxide Desulfurization Catalyst Experts on Haze Governance

June 27th, the International Energy Agency (referred to as the IEA) issued a thought-provoking report that air pollution has led to a major public health crisis, and resulted in about 6.5 million deaths each year, also said that "a lot of the root causes and solutions" of the energy industry on air pollution has been found. It is reported that this is the Paris-based energy security agency first study of air pollution, and will continue to expand their mandate. Facing with the current very urgent situation of global climate change, as well as India and other countries have become major energy consumer and pollution countries in the world, the International Energy Agency decided to re-adjust its strategy. In April this year, New Delhi, the Indian capital has been reported to become the world's worst area of haze, which caught up with China, and furthermore its air pollution level is continuously deteriorating.

tungsten trioxide and desulfurization tower
 
Recently, the latest research of the Beijing University showed that the residents using coal is the main source of haze; data showed that in Beijing, home energy use accounts for only 18% of total energy used, but it caused 50% of the black carbon particulate and 69% organic carbon particulate emission; in addition, because of the low combustion efficiency and the lack of flue gas treatment equipments, the residents source emissions have make an important contribution to the concentrations of primary particulate matter and sulfur dioxide in the atmosphere.
 
Flue gas desulfurization tower is commonly used in industrial flue gas treatment apparatus, and desulfurization catalyst is required in the desulfurization process, which  plays a catalytic role within a certain range of pH values. Tungsten trioxide (WO3) is one of tungsten (VI) oxides, the important intermediate form from the industry of tungsten ore to tungsten, which is mainly used for making metal tungsten; at the same time, due to its properties, it is also often used for the preparation of denitrification and desulfurization catalyst. Tungsten trioxide as a main active material is uniformly dispersed on the desulfurization catalyst, to play the role of reducing the activation energy of desulfurization reaction; moreover, since the tungsten trioxide can alleviate sulfide poisoning of the catalyst and increase the anti-sintering capacity of the carrier, in the respects of improving activity, desulfurization efficiency of the catalyst, it also plays an extremely important role.

 

Price Trend of Tungsten in July, 2016

According to the analysis of tungsten market these months, the price of tungsten is going up and down, and it is expected that the trend in July is also in low level.

The world economy is under a downturn circumstance, demand of tungsten is going through the same situation. This year, its price has hit the bottom line as tungsten concentrate to be 57,000RMB/TON. After several government’s stimulus activities, such as State Reserve Purchasing and Storage Tungsten Plan, Main Tungsten Companies’ Meetings, the price has been going up until end May. Even the third Meeting of China Tungsten Industry Association and main suppliers had also held a meeting in Jun, but there seems no increasing after this meeting. As the opposite side, the price is going down and down, and the trend will continue in July.

tungsten ore and rod

Actually, the price of 57,000RMB/TON for the tungsten concentrate has beyond the manufacturers’ cost, and that is why most of the manufacturers are only opening for a basic salary support and equipments operations, but do not eager to larger the production volume. Even at such opening status, the stock size is still in thousand tons. A Jiangxi Company shows its stock as 400tons concentrate. In order to keep the price level in 75,000RMB/TON, the eight Largest Tungsten Suppliers has limited its production volume, with a hope that the market will be brighter.

As consumption productions, in fact, tungsten has also got a seasonal time, which is July and August. Europe and America have been two large tungsten users, most of factories are tend to being vacation to escape from such hot whether and high temperature. As a result, the purchasing in these two months will be obviously decreasing.

Less purchasing, but larger stock, tungsten price is expected to stay in a low level. Conversely, when the price decreases to a bottom level, stays and go up rapidly as a trend. Tungsten is a mysterious but significant material. No matter the price is, its strategic position is never changed. Down trend of raw material will lead to a finished products price declining, including tungsten bar, tungsten electrode, ect. Therefore, the price of tungsten finished products in July is still not so positive.

 

Tungsten Oxide Industry Analysis and Outlook 2016-2023

Tungsten Oxide Market: Emerging Applications and Drivers
Tungsten oxide has several everyday uses. It is used in the manufacture of tungstates for fireproofing fabrics, for x-ray screen phosphors, and in gas sensors. Tungsten trioxide is also used as a pigment in coatings, paints, and ceramics due to its rich yellow color. In addition, tungsten trioxide has also proven useful in the production of smart windows or electro chromic windows. Smart windows are essentially electrically switchable glass that can alter its light transmission properties when a certain voltage is applied. This allows the user to obtain the desired level of tint on their windows by deciding how much light they want passing through.

The growth in end user industries is expected to increase consumption of tungsten oxide. The growth in medical and firefighting industry is set to drive the tungsten oxide market. In addition, rising consumption of semi-conducting compounds in emerging economies of Asia Pacific and Latin America is expected to boost demand for tungsten oxide. However, availability of substitutes and fluctuating raw material prices could hamper the growth of the market.

Tungsten Oxide

Tungsten Oxide Market: Regional Dynamics
Growth in tungsten oxide demand is expected to be led by the Asia Pacific market, particularly China which accounted for majority of consumption in 2013. Major manufacturers of tungsten compounds are relocating their production facilities to China due to availability of cheap labor, infrastructure and attractive government policies. Republic of Korea, India, Vietnam, Malaysia, Cambodia, Australia, New Zealand and Sri Lanka are other major consumers of tungsten oxide in Asia Pacific. North America and Europe are mature markets and expected to experience moderate growth.

Tungsten Carbide High Head Cutter Pump

New CR series 3” and 4” tungsten carbide high head cutter pump produce heads of up to 70 metres.  Designed for cutting fibrous material in industrial or effluent/sewage applications, the new series was developed for applications where pump out either over longer distances or higher elevations is required.
“The new tungsten carbide high head cutter pump range is expected to be of real interest in sewage, effluent and industrial waste applications where more head is required than conventional equipment”, said Australian Pump Industries’ manager, Neil Bennett.  “The combination of the ability to chop material and pump to a high head is a new development,” he said.
The new three-phase CR series start from 2.2kW units that offer flows of up to 600 litres per minute with heads to 20 metres.  At the other end of the scale, the big 22kW 4” version delivers maximum flow of 1700 litres per minute with a head of 70 metres.
All submersible pumps are backed with a 3 year warranty. This is possible because they incorporate features that make them extremely robust and they are designed for an extended working life in severe conditions.

CR series incorporate a cutter mechanism that consists of a Tungsten carbide tip channel impeller and a saw-tooth suction cover hardened surface.  The cutter mechanism cuts fibrous material into small pieces permitting clog free pumping.
Like all sewage and wastewater pumps, the new CR series come with a unique anti-wicking cable entry.  This mechanism protects the motor by sealing the stripped back cable conductors with a moulded rubber or epoxy “potting” which has been loaded between each strand of the conductor.  This unique feature prevents wicking along the strands of the conductor itself and protects the motor.

The motors are dry type squirrel-cage induction design, housed in a water-tight casing.  They conform to insulation classes E or F.  In each of these insulation classes all standard pumps can be used in ambient temperatures of up to 40 degrees Celsius.
The CR series mechanical seal is a double silicone carbon style located inside an oil chamber.  The oil chamber, located beneath the pump chamber and the motor, prevents the ingress of water to the motor.  Tsurumi’s fully oil immersed mechanical seals eliminate spring failure caused by corrosion, abrasion or fouling.

The seal chamber is also fitted with a patented “oil lifter”.  This is a lubricating device for the mechanical seal.  It utilises the centrifugal force if the shaft seal by forcibly supplying lubricating oil to the mechanical seals.  This simple device protects both seals, lubricating and cooling but retaining stable shaft seal effect to extend life.
Pumps up to 7.5Kw have an auto cut out resetting CTP (Circle Thermal Protector).  This is integrated into the motor housing.  The CTP directly cuts the motor circuit if excessive heat builds up or an overcurrent caused by electrical or mechanical failure occurs.
Sliding discharge connectors are also available for the cutter pump range and are popular for permanent installations.  Pumps can be easily removed for maintenance without the need to drain the wastewater pond. The C series are available in a wide range of options from 50 through to 100mm discharge bores and with power ratings of between 0.75Kw to 15Kw.

tungsten carbide high head cutter pump

 

Illegal Sewage Discharging Fined 500,000 RMB, Wo3 Photocatalyst Degrades Papermaking Wastewater

papermaking wastewaterRecently, a paper company in Tianjin due to illegal discharge of industrial waste water, and cause serious pollution to the surrounding environment, was fined of 500,000 RMB. It is reported that this paper-making company is mainly engaged in papermaking from waste paper, and has been handled the environmental protection acceptance procedures; according to the requirements, its generated wastewater should be recycled after treated with the treatment facility, but can not efflux. However, the data on-site inspection showed that the total suspended solids discharge ports exceeded by 18 times, chemical oxygen demand COD exceeded by 24.5 times; the suspended solids of sewage pit outside the plant exceeded by 163 times, chemical oxygen demand exceeded by 123 times, now you can see how serious the pollution is.
 
Papermaking industry occupies an important position in the national economy, which produces a large number of waste water, which is difficult to deal with, and causing serious pollution. Currently, the methods to treat the black liquor at home and abroad are: alkali recovery, coagulation, acid precipitation, biochemical and liquid membrane separation method, and so on. One of the most successful is the alkali recovery method, but because of the large investment, high cost, low alkali recovery and other disadvantages, it is difficult to promote.
 
Tungsten trioxide (WO3) having catalytic properties, not only can be used as the main catalyst to bring out effective utility; but also can be used as the additives to assist an catalyst for improving its activity. WO3 as a semiconductor photocatalyst, with its band gap of 2.4eV ~ 2.8eV, it can response to visible light, when irradiated under the sufficient light energy, electrons will carry out a transition to form a redox system by producing photo-generated electrons and holes, thus to play catalytic oxidation. Studies have shown that composite WO3/α-Fe2O3/W photocatalyst has good results in the depth treatment of papermaking wastewater. Under the optimum conditions, the COD and color removal rate of papermaking wastewater can even reach to 68.3% and 71.2%, respectively, the waste level of water handled deeply with WO3photocatalyst reached the national emission standards. Although, currently the most widely used photocatalyst is based on titanium dioxide, however, with the depth researching of photocatalyst, tungsten trioxide because of its superior performance and non-toxicity, is expected to become the main force of the photocatalyst.

 

Netherlands Haze Purification Tower to China, WO3 Denitration Catalyst Boosts Air Purification

On June 28, Beijing started the public welfare activity of "Reduce haze in Action", and released the five sub-activities of the whole people common revise "Three Character Classic of Green Life" and so on. However, the most striking is that the Netherlands haze purification tower which once set off red-hot in the circle of friends is expected to be introduced to China in July, and begin to handle haze in Beijing at the beginning of September. It is reported that this haze purification tower which is up to 6.5 meters is inspired by the Beijing haze, it can absorb 75 to 80% or more of the haze in the air; and each 30,000 cubic meters of air purification only needs to consume 30 watt of electricity with safety and energy saving. Interestingly, the inventor was whimsy, he collects the gray haze and then makes it a ring by compressed the carbon into a black gem, which is really turning waste into treasure!
 
Of this invention, Yahoo Makers reported as follow: What’s 23 feet tall, eats smog for breakfast, and makes jewelry for fun?
haze purification tower
 
Beijing haze is the most serious area of China, since the haze was put on the issue, it has been cause for many concern. In June, the Ministry of Environmental Protection released the air quality during April and May of Beijing, Tianjin, the Yangtze River Delta, Pearl River Delta region and the overall country's; data shows, PM2.5 concentration decreased year on year in Beijing, which is a good performance.
 
Haze governance is an important part of air purification, nitrogen oxides and sulfur oxides are a major source of air pollution. Since China is a country of coal energy sources, coal burning flue gas desulfurization and denitration projects have become the key of environmental protection. At present, the most commonly used of denitrification project is SCR technology, and it takes WO3 denitration catalyst as the core part, which accounts for about 30% of the denitration system investments. The activity of WO3 denitration catalyst played a direct impact on SCR denitration efficiency, and WO3 is mainly playing the supporting role of anti vulcanization, anti-toxic, anti-sintering of carrier ect. in the denitration catalyst, existing as a catalyst promoter. With the ongoing in-depth and transformation of denitration projects, as well as the improving of the denitration catalyst, WO3 will play an increasingly high effectiveness in SCR systems.

 

Cities Introduce Policies to Reduce Logistics Costs, Accelerating Transactions of Tungsten Products (Tungsten Heater)

Recently, according to the data released by National Development and Reform Commission, it is said that logistics costs was 10.8 trillion RMB in last year, accounting for 16.0% of GDP. Therefore, many cities have been introduced many policies for enterprises to reduce logistics costs, it is possible to significantly reduce the passage money of highway.

"2015 National Logistics Operational Aspect Briefing" shows that the total cost of social logistics is 10.8 trillion RMB in last year, an increase of 2.8% over the previous year, accounting for 16.0% of GDP. Vice Director of China Federation of Logistics and Purchasing Zhouzhi said that the current charge of highway accounts for 30% -40% of the main transport business costs. The member of the National Committee of CPPCC and the vice-chairman of All-China Federation of Industry and Commerce Xu Guanju said that if the logistics cost increases, it will become a stumbling block to the development of domestic manufacturing enterprises.

By reducing the passage money of highway would further reduce logistics costs, which will directly affect the development of tungsten enterprises. Tungsten heater is one of the main tungsten products, and highway transport is the most important way to transport goods. This year China's provinces began to reduce logistics costs and make the appropriate measures. Hubei province has been reduced the province's highway charge about 10% from June 1 this year, and Shanxi province introduced preferential policies by a wide margin for the trucks of highway from May 20.

These policies not only help reduce product transportation costs, but also allow truck drivers benefit from it. Many truck drivers said that reducing the passage cost of highway, they are able to save some of that money. While reducing the cost is conducive to the development of manufacturing enterprises, but the requirement of repair and maintenance to the highway would be stricter, and the increased of vehicular traffic is bound to increase the burden on the road.

highway and tungsten heater

 

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