CN111333111A - Vanadium trioxide preparation device - Google Patents
Vanadium trioxide preparation device Download PDFInfo
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- CN111333111A CN111333111A CN202010327419.3A CN202010327419A CN111333111A CN 111333111 A CN111333111 A CN 111333111A CN 202010327419 A CN202010327419 A CN 202010327419A CN 111333111 A CN111333111 A CN 111333111A
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- vanadium
- water bath
- preparation device
- pipeline
- vanadium trioxide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G31/00—Compounds of vanadium
- C01G31/02—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
Abstract
The invention relates to the field of vanadium trioxide smelting equipment, in particular to a vanadium trioxide preparation device for effectively recovering combustion tail gas in a reduction kiln and efficiently recovering vanadium-containing materials in the tail gas. High-temperature tail gas generated in the reduction reaction enters a vanadium-containing material recovery system through a vanadium-containing material recovery pipeline, wherein the high-temperature tail gas is firstly filtered in a water bath tank through water seal, so that water bath dust removal is realized, particles of the high-temperature tail gas are deposited at the bottom of the water bath tank to form slurry, the slurry enters a washing tank, after the slurry is washed in the washing tank, the vanadium-containing material continuously enters a centrifuge downwards, and the vanadium-containing material is finally obtained through the treatment of the centrifuge. The invention is particularly suitable for the vanadium trioxide smelting process.
Description
Technical Field
The invention relates to the field of vanadium trioxide smelting equipment, in particular to a vanadium trioxide preparation device.
Background
The industrial vanadium slag vanadium extraction for producing vanadium trioxide mainly adopts the process flows of sodium salt roasting, water leaching, impurity removal, vanadium precipitation, drying reduction and wastewater treatment, and basically adopts reducing gas to carry out high-temperature reduction reaction in a rotary kiln, wherein the vanadium recovery through water bath dust removal and tail gas purification is the key point of research, and the selection of devices and processes in the process can influence the stable operation and the environmental protection treatment of the reduction kiln, and influence the product quality and the production cost. In recent years, with increasingly strict environmental protection requirements, the design of a water bath device, the addition of a dust removal facility, the improvement of the quality of vanadium trioxide and the treatment of water bath materials are paid extensive attention, and enterprises are required to continuously optimize and improve the quality according to own processes and production characteristics, so that the aims of stabilizing production, improving quality, reducing cost, saving energy and reducing emission are fulfilled.
The prior related art is as follows: firstly, CN 106186065B provides a treatment method for recycling tail gas, which mainly filters the tail gas through a bag-type dust collector, a heat exchanger, a pressurizing fan and other facilities, achieves the purposes of recycling vanadium oxide and purifying the tail gas, and reduces the pollution of water and tail gas combustion to the environment. Secondly, CN 1261361C proposes a method for treating and recycling dust in vanadium trioxide reduction tail gas, and the vanadium-containing material is used as a recycling material and returned to the previous working procedure to be used as a production raw material. The method mainly adopts a water bath dust removal device to form slurry, then the slurry is mixed with the mass-produced ammonium polyvanadate, and then the mixture is filtered and subjected to plate-frame filter pressing to realize the recovery of vanadium-containing materials, and the method mainly focuses on process selection. CN 202148292U proposes a design method of a reducing gas water bath purification device, and realizes vanadium-containing material recovery, gas purification and continuous production by designing measures of connection of a water bath box and a gas pipeline, material recovery at the bottom of the water bath box and the like. Fourthly, CN 103588248A proposes a method for improving the quality and density of vanadium trioxide, and the main process is to reduce dry ammonium vanadate to produce powdery vanadium trioxide, then press the powdery vanadium trioxide into strips for pelletizing, and form high-density vanadium trioxide after screening. The scheme is difficult to really purify the tail gas better, so that the technical requirement on production quality is improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vanadium trioxide preparation device which can effectively recover combustion tail gas in a reduction kiln and efficiently recover vanadium-containing materials in the tail gas.
The technical scheme adopted by the invention for solving the technical problems is as follows: vanadium trioxide preparation facilities, including reduction kiln, including the vanadium-containing material recovery system, the vanadium-containing material recovery system from last down is connected by water bath jar, washing tank and centrifuge and is constituted in proper order, reduction kiln is through the vanadium-containing material recovery pipeline and water bath jar intercommunication.
Further, a circulating water system is arranged outside the water bath tank.
Further, the circulating water system is composed of a circulating water pipe initial section, a circulating water pump and a circulating water pipe end section which are sequentially connected, wherein the circulating water pipe initial section and the circulating water pipe end section are communicated with the water bath tank.
Further, a slurry valve water replenishing pipeline is arranged at the position of a slurry valve at the bottom of the water bath tank.
Further, a water bath tank water replenishing pipeline is arranged at the top of the water bath tank.
Further, a water bath tank gas discharge pipeline is arranged at the top of the water bath tank.
Further, the vanadium-containing material recovery pipeline is composed of a first recovery pipeline and a second recovery pipeline, wherein the included angle between the first recovery pipeline and the second recovery pipeline is in the range of 120-150 ℃.
Further, the reduction kiln comprises a combustion chamber, and the reduction kiln is arranged in the combustion chamber.
Further, the top of the combustion chamber is communicated with a chimney, and a hot air draft device is arranged at a smoke inlet of the chimney.
Furthermore, a coke oven gas inlet pipe is arranged at the discharge end of the reduction kiln, and a coke oven gas inlet pipe regulating valve is arranged on the coke oven gas inlet pipe.
The invention has the beneficial effects that: in practical use, the raw material ammonium polyvanadate is subjected to high-temperature reduction reaction with coke oven gas in a high-temperature environment of a reduction kiln to produce a vanadium trioxide semi-finished product. High-temperature tail gas generated in the reduction reaction enters a vanadium-containing material recovery system through a vanadium-containing material recovery pipeline, wherein the high-temperature tail gas is firstly filtered in a water bath tank through water seal, so that water bath dust removal is realized, particles of the high-temperature tail gas are deposited at the bottom of the water bath tank to form slurry, the slurry enters a washing tank, after the slurry is washed in the washing tank, the vanadium-containing material continuously enters a centrifuge downwards, and the vanadium-containing material is finally obtained through the treatment of the centrifuge. The invention is particularly suitable for the vanadium trioxide smelting process.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Labeled as: the device comprises a reduction kiln 1, a combustion chamber 2, a reduction kiln rotating device 3, a reduction kiln sealing device 4, a vibrating screen 5, a hot air draft device 6, a chimney 7, a water bath tank 8, a washing tank 9, a centrifuge 10, a vanadium-containing material chute 11, a circulating water pump 12, a water bath tank gas discharge pipeline 13, a dry ammonium vanadate bin 14, a conveying spiral 15, a tail gas regulating valve 16, a first recovery pipeline 17, a second recovery pipeline 18, a coke oven gas inlet pipe regulating valve 19A, a combustion chamber air inlet pipe regulating valve 19B, a combustion chamber coke oven gas inlet pipe regulating valve 19C, a hopper 20, a temperature measuring device 21, a water bath tank water supplementing pipeline 22A, a slurry valve water supplementing pipeline 22B, an observation hole 23, a slurry valve 24, a circulating water pipe primary section 25, a circulating water pipe final section 26, a coke oven gas pipeline 27 and an air pipeline 28.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The vanadium trioxide preparation device shown in figure 1 comprises a reduction kiln 1 and a vanadium-containing material recovery system, wherein the vanadium-containing material recovery system is formed by sequentially connecting a water bath tank 8, a washing tank 9 and a centrifuge 10 from top to bottom, and the reduction kiln 1 is communicated with the water bath tank 8 through a vanadium-containing material recovery pipeline.
This device is ingenious combines together water bath tank 8, washing jar 9 and centrifuge 10 to realized quality promotion and material recovery on this basis, and final tail gas purification handles the back, can also get into other devices and reach cyclic utilization as combustion medium. Specifically, this device is through the high temperature tail gas in time discharging reduction kiln 1, and the effectual reduction reaction condition that improves in reduction kiln 1 to the quality that has realized improving vanadium trioxide and the stability of equipment operation, thereby high-efficient separation obtains vanadium trioxide, and gets into other burner after realizing the high temperature tail gas purification treatment in reduction kiln 1 and use. The device has the advantages of high vanadium recovery rate and low water content, can improve the quality of vanadium trioxide on the original basis, operates stably, efficiently utilizes purified coal gas, and has short flow, high efficiency and obvious environmental protection treatment effect. Wherein, preferably, establish agitating unit in the washing jar 9, accomplish the material washing, improve the recovery vanadium material quality. The bottom of the water bath tank 8 is preferably of a conical structure, so that the slurry can be conveniently aggregated. In addition, generally, the reduction kiln 1 is arranged in the combustion chamber 2, as shown in fig. 1, the top of the combustion chamber 2 is communicated with a chimney 7, and a hot air draft device 6 is arranged at a smoke inlet of the chimney 7, so that the smoke formed by combustion in the combustion chamber 2 can be conveniently and intensively treated.
In order to obtain a better high-temperature exhaust gas purification effect, the following scheme can be selected: and a circulating water system is arranged outside the water bath tank 8. As shown in fig. 1, the circulating water system is preferably composed of a circulating water pipe initial section 25, a circulating water pump 12 and a circulating water pipe end section 26 which are connected in sequence, wherein the circulating water pipe initial section 25 and the circulating water pipe end section 26 are communicated with the water bath tank 8. Generally, the water seal height in the water bath tank is 5-8cm, so that the pressure in the reduction kiln 1 can be effectively controlled, and the water bath dust removal and the flue gas purification are realized. Wherein, the circulating water pump 12 continuously operates to realize dynamic spraying and water bath sealing, the lift of the circulating water pump 12 is preferably 15-25m, and the flow is 8-15m3H is used as the reference value. In order to facilitate the discharge of the purified high-temperature tail gas, a water bath tank gas discharge pipeline 13 is preferably arranged at the top of the water bath tank 8.
In order to better discharge the high-temperature tail gas in the reduction kiln 1, the following scheme is preferred: the vanadium-containing material recovery pipeline is composed of a first recovery pipeline 17 and a second recovery pipeline 18, wherein the included angle between the first recovery pipeline 17 and the second recovery pipeline 18 is in the range of 120-150 ℃. Furthermore, the diameter of the vanadium-containing material recycling pipeline, i.e. the first recycling pipeline 17 and the second recycling pipeline 18, is preferably 350-500mm, wherein the first recycling pipeline 17 is preferably 45-60 degrees from the horizontal plane. Wherein, the water outlet of the second recovery pipeline 18 is preferably 5-10cm lower than the plane of the water outlet of the tail section 26 of the circulating water pipe.
In order to realize the flow rate control of the slurry obtained by the water bath of the water bath tank 8 and timely water supplement, a slurry valve water supplement pipeline 22B is preferably arranged at the position of a slurry valve 24 at the bottom of the water bath tank 8, and a water bath tank water supplement pipeline 22A is preferably arranged at the top of the water bath tank 8. When in actual use, let ground paste valve 24 and water bath jar moisturizing pipeline 22A realize chain control, when ground paste valve 24 was opened, water bath jar moisturizing pipeline 22A of water bath jar 8 was opened in step, and the flow is equal, and water bath jar moisturizing pipeline 22A was closed in step when ground paste valve 24 was closed, guaranteed water bath jar 8's sealed water level.
In order to improve the reaction effect in the reduction kiln 1, it is preferable that the discharge end of the reduction kiln 1 is provided with a coke oven gas inlet pipe, and the coke oven gas inlet pipe is provided with a coke oven gas inlet pipe regulating valve 19A.
In actual use, the coke oven gas in the coke oven gas pipeline 27 has the following components: 55-60% of hydrogen, 23-27% of methane, 5-8% of carbon monoxide, 1.5-3% of carbon dioxide, 0.3-0.8% of oxygen, 3-7% of nitrogen, 2-4% of unsaturated hydrocarbon and 10.64GJ/KNm3 of heat value. Generally, the speed of the material conveying screw 15 is preferably 850-1050 kg/h, the temperature in the combustion chamber 2 is 750-950 ℃, the temperature discharged from the chimney 7 is 150-The temperature of the pipeline 17 is 200-400 ℃, and the flow of the coke oven gas inlet pipe regulating valve 19A is 200-300 m3The rotation speed of the reduction kiln 1 is 55-75 s/r, the diameter of the reduction kiln 1 is 1000mm, and the length of the reduction kiln is 12-15 m.
The actual manufacturing process of the present invention, in conjunction with the overall structure of the apparatus, is such as shown in FIG. 1: a dry ammonium polyvanadate raw material firstly enters a reduction kiln 1 from a dry ammonium vanadate bin 14 through a conveying screw 15 and is subjected to high-temperature reduction reaction with coke oven gas entering through a coke oven gas inlet pipe regulating valve 19A, the coke oven gas and air are respectively combusted in a combustion chamber 2 through a gas inlet pipe regulating valve 19C and a combustion chamber air inlet pipe regulating valve 19B according to flow proportion to generate high-temperature flue gas to heat the reduction kiln 1, specific combustion conditions are observed through an observation hole 23, the combusted flue gas is discharged outside through a hot air draft device 6 and a chimney 7, the temperature of the flue gas can be measured by a temperature measuring device 21, a reduction kiln rotating device 3 controls the rotating speed of the reduction kiln 1, a reduction kiln sealing device 4 controls the reduction kiln 1 to be sealed, and the site environment of the reduction kiln 1 during discharging is ensured. And screening the semi-finished vanadium trioxide in a vibrating screen 5 after short storage in a hopper 20, wherein the screen of the vibrating screen is preferably 20-30 meshes. And (4) feeding qualified fine particle materials after screening into a finished product packaging barrel, and independently crushing unqualified oversize materials for use. High-temperature tail gas in the reduction kiln 1 enters the water bath tank 8 through the tail gas regulating valve 16, the first recovery pipeline 17 and the second recovery pipeline 18, water bath dedusting is realized through water seal generated by the primary section 25 of the circulating water pipe, and purified coal gas is output through the coal gas discharge pipeline 13 of the water bath tank and enters other gas equipment for combustion as an energy medium. And slurry at the bottom of the water bath tank 8 is discharged into the washing tank 9 intermittently through a slurry valve 24, wherein the water supply pipeline 22A of the water bath tank is started to supply water to realize liquid level balance when the slurry valve 24 acts, and the intermittent discharging opening interval is 20-25 min. And (3) replenishing water in the washing tank 9 through a slurry valve water replenishing pipe 22B, washing the slurry, and then feeding the washed slurry into the centrifuge 10, and collecting and airing the obtained vanadium-containing material chute 11.
Examples
Example 1
260m of reducing gas in reduction kiln3The rotation speed of the reduction kiln is 65 s/r, and the maximum temperature of the reduction kiln isFeeding ammonium polyvanadate at 920 ℃ at 900kg/h to obtain 650kg/h vanadium trioxide product, 7kg oversize product, wherein the mass ratio of TV to 64.2%, S to 0.031%, and Na2O is 0.68%, density is 1.08g/cm3(ii) a Replenishing production water 5.6m per day3And h, putting the vanadium-containing material 160kg/d into a water bath tank and a washing tank, centrifuging to obtain the vanadium-containing material with the water content of 36.3 percent, the TV content of 62.8 percent and the S content of 0.051 percent, and drying for use.
Example 2
280m of reducing gas in reducing kiln3The rotation speed of the reduction kiln is 70S/r, the maximum temperature of the reduction kiln is 930 ℃, the feeding quantity of ammonium polyvanadate is 915kg/h, the obtained vanadium trioxide product is 658kg/h, the oversize product is 9kg, and the product quality is that TV is 64.4 percent, S is 0.028 percent, Na is added2O is 0.69%, density is 1.13g/cm3(ii) a Replenishing production water 6.1m per day3And h, putting the vanadium-containing material into a water bath tank and a washing tank, centrifuging the vanadium-containing material to obtain 165kg/d, drying the vanadium-containing material to obtain the vanadium-containing material, wherein the moisture content of the vanadium-containing material is 36.7 percent, the TV content is 63.2 percent, and the S content is 0.055 percent.
Example 3
Reducing gas 285m in reduction kiln3The rotation speed of the reduction kiln is 60S/r, the maximum temperature of the reduction kiln is 915 ℃, the feeding amount of ammonium polyvanadate is 950kg/h, the obtained vanadium trioxide product is 668kg/h, the oversize product is 11kg, and the product quality is that TV is 63.8 percent, S is 0.038 percent, Na is added2O is 0.72%, density is 1.06g/cm3(ii) a Replenishing production water 6.4m per day3And h, putting the vanadium-containing material into a water bath tank and a washing tank, centrifuging the vanadium-containing material to obtain 171kg/d, drying the vanadium-containing material to obtain the vanadium-containing material, wherein the moisture content of the vanadium-containing material is 35.9 percent, the TV content is 63.4 percent, and the S content is 0.051 percent.
Example 4
295m of reducing gas in a reduction kiln3The rotation speed of the reduction kiln is 68S/r, the maximum temperature of the reduction kiln is 920 ℃, the feeding amount of ammonium polyvanadate is 980kg/h, the obtained vanadium trioxide product is 673kg/h, the oversize product is 15kg, the product quality is that TV is 65.1 percent, S is 0.042 percent, Na is added2O is 0.69%, density is 1.09g/cm3(ii) a Replenishing production water 6.9m per day3And h, putting the materials into a water bath tank and a washing tank, centrifuging the materials to obtain 179kg/d vanadium-containing materials, wherein the moisture content is 36.9 percent, the TV is 63.6 percent, and the S is 0.048 percent, and drying the materials for use.
According to the embodiment, the vanadium-containing material obtained by the device is high in vanadium recovery rate and low in moisture, the quality of vanadium trioxide is effectively improved, the technical advantages are obvious, and the market popularization is wide.
Claims (10)
1. Vanadium trioxide preparation facilities, including reduction kiln (1), its characterized in that: including containing vanadium material recovery system, containing vanadium material recovery system from last down connect by water bath jar (8), washing jar (9) and centrifuge (10) in proper order and constitute, reduction kiln (1) is through containing vanadium material recovery pipeline and water bath jar (8) intercommunication.
2. The vanadium trioxide preparation device according to claim 1, wherein: and a circulating water system is arranged outside the water bath tank (8).
3. The vanadium trioxide preparation device according to claim 2, wherein: the circulating water system is composed of a circulating water pipe initial section (25), a circulating water pump (12) and a circulating water pipe end section (26) which are sequentially connected, wherein the circulating water pipe initial section (25) and the circulating water pipe end section (26) are communicated with the water bath tank (8).
4. The vanadium trioxide preparation device according to claim 1, 2 or 3, wherein: and a slurry valve water replenishing pipeline (22B) is arranged at the slurry valve (24) at the bottom of the water bath tank (8).
5. The vanadium trioxide preparation device according to claim 1, 2 or 3, wherein: and a water bath tank water replenishing pipeline (22A) is arranged at the top of the water bath tank (8).
6. The vanadium trioxide preparation device according to claim 1, 2 or 3, wherein: a water bath tank gas discharge pipeline (13) is arranged at the top of the water bath tank (8).
7. The vanadium trioxide preparation device according to claim 1, 2 or 3, wherein: the vanadium-containing material recovery pipeline is composed of a first recovery pipeline (17) and a second recovery pipeline (18), wherein the included angle between the first recovery pipeline (17) and the second recovery pipeline (18) is in the range of 120-150 ℃.
8. The vanadium trioxide preparation device according to claim 1, 2 or 3, wherein: comprises a combustion chamber (2), and the reduction kiln (1) is arranged in the combustion chamber (2).
9. The vanadium trioxide preparation device according to claim 8, wherein: the top of the combustion chamber (2) is communicated with a chimney (7), and a hot air exhaust device (6) is arranged at a smoke inlet of the chimney (7).
10. The vanadium trioxide preparation device according to claim 1, 2 or 3, wherein: the discharge end of the reduction kiln (1) is provided with a coke oven gas inlet pipe, and the coke oven gas inlet pipe is provided with a coke oven gas inlet pipe regulating valve (19A).
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1179748A (en) * | 1997-08-29 | 1999-03-23 | Kashimakita Kyodo Hatsuden Kk | Continuous production of high-purity vanadium electrolyte solution |
| CN2515550Y (en) * | 2001-07-08 | 2002-10-09 | 徐江 | Active impacted wet dust collector |
| CN103961997A (en) * | 2014-05-29 | 2014-08-06 | 湖南众鑫新材料科技有限公司 | Process for recycling exhaust gas from ammonium metavanadate roasting furnace |
| CN106268127A (en) * | 2016-08-12 | 2017-01-04 | 攀钢集团西昌钢钒有限公司 | V2o5reduction kiln reduction exhaust gas recovery system and recovery process |
| CN109331625A (en) * | 2018-12-04 | 2019-02-15 | 攀枝花钢城集团瑞通制冷设备有限公司 | Vanadium trioxide restores tail gas purification tower |
| CN110064266A (en) * | 2019-05-31 | 2019-07-30 | 攀钢集团钒钛资源股份有限公司 | Vanadium trioxide produces tail gas dust cleaning apparatus |
| CN110585830A (en) * | 2019-10-10 | 2019-12-20 | 攀钢集团钒钛资源股份有限公司 | System for wet dust removal of tail gas of rotary kiln |
-
2020
- 2020-04-23 CN CN202010327419.3A patent/CN111333111A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1179748A (en) * | 1997-08-29 | 1999-03-23 | Kashimakita Kyodo Hatsuden Kk | Continuous production of high-purity vanadium electrolyte solution |
| CN2515550Y (en) * | 2001-07-08 | 2002-10-09 | 徐江 | Active impacted wet dust collector |
| CN103961997A (en) * | 2014-05-29 | 2014-08-06 | 湖南众鑫新材料科技有限公司 | Process for recycling exhaust gas from ammonium metavanadate roasting furnace |
| CN106268127A (en) * | 2016-08-12 | 2017-01-04 | 攀钢集团西昌钢钒有限公司 | V2o5reduction kiln reduction exhaust gas recovery system and recovery process |
| CN109331625A (en) * | 2018-12-04 | 2019-02-15 | 攀枝花钢城集团瑞通制冷设备有限公司 | Vanadium trioxide restores tail gas purification tower |
| CN110064266A (en) * | 2019-05-31 | 2019-07-30 | 攀钢集团钒钛资源股份有限公司 | Vanadium trioxide produces tail gas dust cleaning apparatus |
| CN110585830A (en) * | 2019-10-10 | 2019-12-20 | 攀钢集团钒钛资源股份有限公司 | System for wet dust removal of tail gas of rotary kiln |
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