CN217220754U - Comprehensive treatment system for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride - Google Patents
Comprehensive treatment system for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride Download PDFInfo
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- CN217220754U CN217220754U CN202220549697.8U CN202220549697U CN217220754U CN 217220754 U CN217220754 U CN 217220754U CN 202220549697 U CN202220549697 U CN 202220549697U CN 217220754 U CN217220754 U CN 217220754U
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Abstract
The utility model provides an anhydrous hydrogen fluoride prepares tailings flue gas dust comprehensive treatment system includes dust extraction, one-level washing device, second grade washing device, tertiary washing device, dust extraction's air inlet setting is directly over the sediment mouth that unloads of tailings, and dust extraction's gas outlet and one-level washing device's air inlet intercommunication, the gas outlet of one-level washing device and second grade washing device's air inlet intercommunication, second grade washing device's gas outlet and tertiary washing device's air inlet intercommunication, one-level washing device and second grade washing device are through washing edulcoration, and tertiary washing device passes through alkali lye edulcoration. In the whole process, washing water is fully utilized, smoke is fully absorbed, and the effects of high efficiency and energy conservation are achieved.
Description
Technical Field
The utility model relates to a waste water treatment technical field especially relates to a tailings flue gas dust comprehensive treatment system is prepared to anhydrous hydrogen fluoride.
Background
The main component of the tailings for preparing the anhydrous hydrogen fluoride is calcium sulfate, and the tailings are discharged from a slag discharging port of a slag warehouse. In the process of slag unloading, floating dust and volatile smoke exist, the smoke contains a large amount of hydrogen fluoride gas, and the smoke has strong corrosivity after absorbing moisture or meeting water, thereby harming the health of workers and polluting the environment. The acidic gas is usually absorbed by alkali liquor, which is generally sodium hydroxide solution, but sodium fluoride generated by the reaction of hydrogen fluoride and sodium hydroxide is very easy to dissolve in water, so that fluoride ions in the wastewater exceed the standard. And the sodium fluoride solution is also susceptible to hydrolysis, producing hydrofluoric acid, which can corrode pipelines and the like.
Disclosure of Invention
In view of this, it is necessary to provide an efficient and energy-saving comprehensive treatment system for flue gas and dust from tailings produced by anhydrous hydrogen fluoride.
The utility model provides an anhydrous hydrogen fluoride prepares tailings flue gas dust comprehensive treatment system includes dust extraction, one-level washing device, second grade washing device, tertiary washing device, dust extraction's air inlet setting is directly over unloading the cinder notch of tailings, dust extraction's gas outlet and one-level washing device's air inlet intercommunication, one-level washing device's gas outlet and second grade washing device's air inlet intercommunication, second grade washing device's gas outlet and tertiary washing device's air inlet intercommunication, one-level washing device and second grade washing device are through the washing edulcoration, and tertiary washing device passes through the alkali lye edulcoration.
Preferably, one-level washing device includes first seal housing, first mechanism, the first pond of circulating water that sprays, the lower extreme of the lateral wall of first seal housing is equipped with the air inlet, the top of first seal housing is equipped with the gas outlet, the bottom of first seal housing is equipped with the delivery port, first mechanism that sprays is located first seal housing, the first water inlet that sprays the mechanism passes through the pipeline intercommunication with first pond of circulating water, water in the first pond of circulating water passes through the water pump and gets into first mechanism of spraying in, the delivery port of first seal housing passes through the pipeline intercommunication with first pond of circulating water, first mechanism spun water smoke that sprays enters into first pond of circulating water through gravity.
Preferably, the second grade washing device includes that the second seals the casing, the second sprays mechanism, second circulation pond, the lower extreme of the lateral wall of the second seals the casing is equipped with the air inlet, the top of the second seals the casing is equipped with the gas outlet, the bottom of the second seals the casing is equipped with the delivery port, the second sprays the mechanism and is located the second seals the casing, the water inlet that the second sprayed the mechanism passes through the pipeline intercommunication with the second circulation pond, water in the second circulation pond passes through the water pump and gets into in the second sprays the mechanism, the delivery port of the second seals the casing and passes through the pipeline intercommunication with the second circulation pond, the second sprays mechanism spun water smoke and enters into the second circulation pond through gravity.
Preferably, tertiary washing device includes that third seal housing, third spray mechanism, alkali lye pond, the lower extreme of the lateral wall of third seal housing is equipped with the air inlet, and the top of third seal housing is equipped with the gas outlet, and the bottom of third seal housing is equipped with the liquid outlet, and the third sprays the mechanism and is located the third seal housing, and the third sprays the inlet of mechanism and passes through the pipeline intercommunication with alkali lye pond, and water in the alkali lye pond passes through the water pump and gets into in the third spray mechanism, and the delivery port of third seal housing and alkali lye pond pass through the pipeline intercommunication, and the third sprays mechanism spun water smoke and passes through gravity and get into in the alkali lye pond.
Preferably, the height of the alkali liquor pool is greater than that of the second circulating water pool, the liquid in the alkali liquor pool can overflow into the second circulating water pool, the height of the second circulating water pool is greater than that of the first circulating water pool, and the water in the second circulating water pool can overflow into the first circulating water pool.
Preferably, anhydrous hydrogen fluoride prepares tailings flue gas dust comprehensive treatment system still includes washing water treatment mechanism, washing water treatment mechanism includes vacuum filter, neutralization groove, sewage treatment station, vacuum filter's water inlet and first circulation pond pass through the pipeline intercommunication to filter the water in the first circulation pond, vacuum filter's delivery port and the water inlet in neutralization groove pass through the pipeline intercommunication, in order to carry out neutralization with the washing water after filtering, the delivery port in neutralization groove and the water inlet intercommunication at sewage treatment station to further handle the washing water to satisfying the emission requirement.
Preferably, the spray heads of the first spraying mechanism, the second spraying mechanism and the third spraying mechanism are provided with multiple layers, so that gas can be fully contacted with the washing liquid.
Preferably, the spray head of the third spraying mechanism is a spiral spray head to prevent the spray head from being blocked by alkali liquor.
Preferably, dust extraction includes suction hood, negative-pressure air fan, the suction hood is equipped with a plurality of air inlets, and the air inlet of suction hood is located and unloads the cinder notch directly over, and the suction hood passes through the pipeline intercommunication with the air inlet of first seal shell, and negative-pressure air fan installs on the pipeline between suction hood and first seal shell.
Has the advantages that: the utility model discloses an anhydrous hydrogen fluoride prepares tailings flue gas dust comprehensive treatment system passes through multistage washing, can make dust, sour gas etc. in the flue gas fully absorbed. Meanwhile, the alkali liquor in the alkali liquor pool has the best adsorption performance, can overflow into the second circulating water pool after being used for absorbing hydrogen fluoride gas, and can be continuously used for absorbing dust, smoke and the like in the smoke, and the liquid in the second circulating water pool also has certain adsorption performance, enters the first circulating water pool after overflowing, and is used for absorbing main dust and smoke in the smoke. After multiple cycles, the water in the first circulating water tank is not suitable for washing the flue gas, so that the flue gas enters a vacuum filtration and neutralization tank for treatment, the treated washing liquid is not corrosive any more, but has high ion concentration and is not suitable for washing, and then the flue gas is further sent to a sewage treatment station for treatment. In the whole process, the washing water is fully utilized, the smoke is fully absorbed, and the effects of high efficiency and energy conservation are achieved.
Drawings
FIG. 1 is a schematic structural diagram of the comprehensive treatment system for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride.
In the figure: the comprehensive treatment system comprises a comprehensive treatment system 10 for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride, a dust suction device 20, a primary washing device 30, a first sealed shell 301, a first spraying mechanism 302, a first circulating water tank 303, a secondary washing device 40, a second sealed shell 401, a second spraying mechanism 402, a second circulating water tank 403, a third washing device 50, a third sealed shell 501, a third spraying mechanism 502 and an alkali liquor tank 503.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Referring to fig. 1, a comprehensive treatment system 10 for flue gas and dust generated by preparing tailings from anhydrous hydrogen fluoride comprises a dust suction device 20, a first-stage washing device 30, a second-stage washing device 40 and a third-stage washing device 50, wherein an air inlet of the dust suction device 20 is arranged right above a slag discharge port of the tailings, an air outlet of the dust suction device 20 is communicated with an air inlet of the first-stage washing device 30, an air outlet of the first-stage washing device 30 is communicated with an air inlet of the second-stage washing device 40, an air outlet of the second-stage washing device 40 is communicated with an air inlet of the third-stage washing device 50, the first-stage washing device 30 and the second-stage washing device 40 remove impurities through washing, and the third-stage washing device 50 removes impurities through alkali liquor.
Further, one-level washing device 30 includes first sealed housing 301, first mechanism 302, first circulating water pond 303 that sprays, the lower extreme of first sealed housing 301's lateral wall is equipped with the air inlet, first sealed housing 301's top is equipped with the gas outlet, first sealed housing 301's bottom is equipped with the delivery port, first mechanism 302 that sprays is arranged in first sealed housing 301, the water inlet and the first circulating water pond 303 that first mechanism 302 that sprays pass through the pipeline intercommunication, water in the first circulating water pond 303 passes through the water pump and gets into in the first mechanism 302 that sprays, the delivery port and the first circulating water pond 303 of first sealed housing 301 pass through the pipeline intercommunication, first mechanism 302 spun water smoke that sprays enters into the first circulating water pond 303 through gravity.
Further, the second-stage washing device 40 includes a second sealed housing 401, a second spraying mechanism 402 and a second circulating water tank 403, an air inlet is arranged at the lower end of the side wall of the second sealed housing 401, an air outlet is arranged at the top of the second sealed housing 401, a water outlet is arranged at the bottom of the second sealed housing 401, the second spraying mechanism 402 is located in the second sealed housing 401, a water inlet of the second spraying mechanism 402 is communicated with the second circulating water tank 403 through a pipeline, water in the second circulating water tank 403 enters the second spraying mechanism 402 through a water pump, the water outlet of the second sealed housing 401 is communicated with the second circulating water tank 403 through a pipeline, and water mist sprayed by the second spraying mechanism 402 enters the second circulating water tank 403 through gravity.
Further, the third-stage washing device 50 includes a third sealing housing 501, a third spraying mechanism 502 and an alkaline solution pool 503, an air inlet is arranged at the lower end of the side wall of the third sealing housing 501, an air outlet is arranged at the top of the third sealing housing 501, a liquid outlet is arranged at the bottom of the third sealing housing 501, the third spraying mechanism 502 is located in the third sealing housing 501, a liquid inlet of the third spraying mechanism 502 is communicated with the alkaline solution pool 503 through a pipeline, water in the alkaline solution pool 503 enters the third spraying mechanism 502 through a water pump, a water outlet of the third sealing housing 501 is communicated with the alkaline solution pool 503 through a pipeline, and water mist sprayed by the third spraying mechanism 502 enters the alkaline solution pool 503 through gravity.
If the flue gas is directly washed by the alkali liquor repeatedly without adopting a multi-stage washing mode, high-concentration acid liquor generated by repeated washing can generate greater corrosivity on equipment, and meanwhile, part of hydrogen fluoride can come out in the washing liquid in a gas form to generate acid mist or improve air acidity, so that the health of workers is harmed. If lime milk is used as the washing liquid, the nozzle is easily blocked by repeated washing. Through multistage washing, the live time of shower nozzle can be prolonged. Meanwhile, the service time of each level of washing liquid is reduced, the amount of the washing liquid is unchanged, the time for washing the flue gas is prolonged, the washing effect is improved, and the generation of acid gas and acid mist is reduced.
Further, the height of the alkali liquor pool 503 is greater than that of the second circulating water pool 403, the liquid in the alkali liquor pool 503 can overflow into the second circulating water pool 403, the height of the second circulating water pool 403 is greater than that of the first circulating water pool 303, and the water in the second circulating water pool 403 can overflow into the first circulating water pool 303.
The lime milk reacts with the wash liquor containing hydrogen fluoride to produce, in addition to the solid material calcium fluoride, water, and part of the calcium hydroxide, which after many cycles, falls partly in the form of a precipitate to the bottom of the lye pool 503. Part of the washing solution overflows into the second circulation water tank 403, and after the second circulation water tank 403 is washed for a plurality of times, the pH value of the washing solution is lowered, and likewise, part of the washing solution falls to the bottom of the second circulation water tank 403 in a precipitation manner, and part of the washing solution overflows into the first circulation water tank 303.
When the flue gas passes through the first-stage washing device 30, the concentration of acid gas and dust in the flue gas is high, the requirement for the washing liquid is not high, and the influence of part of the washing liquid mixed into the second circulating water tank 403 on the washing effect is small. When the flue gas passes through the secondary washing device 40, the concentration of acid gas and dust in the flue gas is low, and the requirements on the washing liquid are general, and the influence of part of the washing liquid mixed into the alkaline liquid pool 503 on the washing effect is small. The concentration of acid gases and dust in the flue gas is already low when the flue gas passes through the three-stage scrubbing unit 50. If the pH of the scrubbing solution is low, it is likely that the acid gas in the flue gas cannot be further removed. Acid gas in the flue gas can be well removed through alkali liquor absorption and neutralization.
Meanwhile, the flue gas contains gases such as sulfur dioxide, hydrogen sulfide and the like besides hydrogen fluoride. They produce sulfite examples with water. The calcium sulfite produced by sulfite ions and calcium ions has poor solubility. By multiple washing stages, the sulphite in the scrubbing solution can become an example of sulphate, resulting in calcium sulphate which is more prone to form precipitates. Thus, the multi-stage washing also contributes to wastewater treatment.
Further, anhydrous hydrogen fluoride prepares tailings flue gas dust comprehensive treatment system 10 still includes washing water treatment mechanism, washing water treatment mechanism includes vacuum filter, neutralization tank, sewage treatment station, vacuum filter's water inlet and first circulation pond 303 pass through the pipeline intercommunication to water in the first circulation pond 303 filters, vacuum filter's delivery port and the water inlet in neutralization tank pass through the pipeline intercommunication, in order to carry out the neutralization with the washing water after filtering, the delivery port in neutralization tank and the water inlet intercommunication at sewage treatment station, in order to further handle the washing water to satisfying the emission requirement.
The water in the first-stage washing device 30 is recycled, the pH of the circulating water is gradually reduced, and the adsorption capacity to the flue gas is gradually reduced. Therefore, the water in the primary washing device 30 needs to be discharged when washing to a certain extent. In addition to acid liquor, dust and sediment can be accumulated during the washing process, and part of calcium fluoride can enter the first circulating water tank 303 from the third-stage washing device 50. Fixed substances such as dust and the like are filtered out through the vacuum filter tank and then enter the neutralization tank for neutralization, so that the wastewater is neutralized, and the wastewater is changed into water meeting the discharge standard through the sewage treatment station.
Further, the nozzles of the first spraying mechanism 302, the second spraying mechanism 402 and the third spraying mechanism 502 are provided with multiple layers, so that the gas can be fully contacted with the washing liquid.
Further, the spray head of the third spraying mechanism 502 is a spiral spray head to prevent the spray head from being blocked by the alkali liquor.
In a preferred embodiment, the dust suction device 20 includes a dust hood and a negative pressure fan, the dust hood has a plurality of air inlets, the air inlets of the dust hood are located right above the slag discharge port, the dust hood is communicated with the air inlets of the first sealing housing 301 through a pipeline, and the negative pressure fan is installed on the pipeline between the dust hood and the first sealing housing 301.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a comprehensive treatment system of anhydrous hydrogen fluoride preparation tailings flue gas dust which characterized in that: including dust extraction, one-level washing device, second grade washing device, tertiary washing device, dust extraction's air inlet setting is directly over the sediment mouth that unloads of tailings, and dust extraction's gas outlet and one-level washing device's air inlet intercommunication, one-level washing device's gas outlet and second grade washing device's air inlet intercommunication, second grade washing device's gas outlet and tertiary washing device's air inlet intercommunication, one-level washing device and second grade washing device are through washing edulcoration, and tertiary washing device passes through alkali lye edulcoration.
2. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 1, is characterized in that: one-level washing device includes first seal housing, first mechanism, the first pond that circulates that sprays, the lower extreme of the lateral wall of first seal housing is equipped with the air inlet, the top of first seal housing is equipped with the gas outlet, the bottom of first seal housing is equipped with the delivery port, first mechanism that sprays is located first seal housing, the first water inlet that sprays the mechanism passes through the pipeline intercommunication with the first pond that circulates, water in the first pond that circulates passes through the water pump and gets into first mechanism that sprays, the delivery port of first seal housing passes through the pipeline intercommunication with first pond that circulates, first mechanism spun water smoke that sprays gets into the first pond that circulates through gravity.
3. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 2, is characterized in that: the second-stage washing device comprises a second sealing shell, a second spraying mechanism and a second circulating water tank, wherein the lower end of the side wall of the second sealing shell is provided with an air inlet, the top of the second sealing shell is provided with an air outlet, the bottom of the second sealing shell is provided with a water outlet, the second spraying mechanism is positioned in the second sealing shell, the water inlet of the second spraying mechanism is communicated with the second circulating water tank through a pipeline, water in the second circulating water tank enters the second spraying mechanism through a water pump, the water outlet of the second sealing shell is communicated with the second circulating water tank through a pipeline, and the water mist sprayed by the second spraying mechanism enters the second circulating water tank through gravity.
4. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 3, is characterized in that: the third-level washing device comprises a third sealing shell, a third spraying mechanism and an alkali liquor pool, wherein an air inlet is formed in the lower end of the side wall of the third sealing shell, an air outlet is formed in the top of the third sealing shell, a liquid outlet is formed in the bottom of the third sealing shell, the third spraying mechanism is located in the third sealing shell, a liquid inlet of the third spraying mechanism is communicated with the alkali liquor pool through a pipeline, water in the alkali liquor pool enters the third spraying mechanism through a water pump, a water outlet of the third sealing shell is communicated with the alkali liquor pool through a pipeline, and water mist sprayed by the third spraying mechanism enters the alkali liquor pool through gravity.
5. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 4, is characterized in that: the height in lye pond is greater than the height in second circulating water pond, and liquid in the lye pond can overflow in the second circulating water pond, and the height in second circulating water pond is greater than the height in first circulating water pond, and the hydroenergy in the second circulating water pond can overflow in the first circulating water pond.
6. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 5, is characterized in that: the comprehensive treatment system for the tailings, the flue gas and the dust prepared by the anhydrous hydrogen fluoride further comprises a washing water treatment mechanism, the washing water treatment mechanism comprises a vacuum filter, a neutralization tank and a sewage treatment station, the water inlet of the vacuum filter is communicated with a first circulating water tank through a pipeline so as to filter water in the first circulating water tank, the water outlet of the vacuum filter is communicated with the water inlet of the neutralization tank through a pipeline so as to neutralize the filtered washing water, and the water outlet of the neutralization tank is communicated with the water inlet of the sewage treatment station so as to further treat the washing water until the emission requirement is met.
7. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 6, is characterized in that: the first spraying mechanism, the second spraying mechanism and the third spraying mechanism are provided with multiple layers of spray heads so that gas can be fully contacted with washing liquid.
8. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 7, is characterized in that: and the spray head of the third spraying mechanism is a spiral spray head so as to prevent the spray head from being blocked by alkali liquor.
9. The comprehensive treatment system for the flue gas dust of the anhydrous hydrogen fluoride production tailings, as claimed in claim 1, is characterized in that: dust extraction includes suction hood, negative-pressure air fan, the suction hood is equipped with a plurality of air inlets, and the air inlet of suction hood is located unloads the cinder notch directly over, and the suction hood passes through the pipeline intercommunication with the air inlet of first seal shell, and negative-pressure air fan installs on the pipeline between suction hood and first seal shell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220549697.8U CN217220754U (en) | 2022-03-14 | 2022-03-14 | Comprehensive treatment system for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220549697.8U CN217220754U (en) | 2022-03-14 | 2022-03-14 | Comprehensive treatment system for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride |
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| CN217220754U true CN217220754U (en) | 2022-08-19 |
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| CN202220549697.8U Active CN217220754U (en) | 2022-03-14 | 2022-03-14 | Comprehensive treatment system for preparing tailings, flue gas and dust by using anhydrous hydrogen fluoride |
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