CN212222700U - Recycling system of desulfurization and denitrification waste liquid - Google Patents
Recycling system of desulfurization and denitrification waste liquid Download PDFInfo
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- CN212222700U CN212222700U CN202020684414.1U CN202020684414U CN212222700U CN 212222700 U CN212222700 U CN 212222700U CN 202020684414 U CN202020684414 U CN 202020684414U CN 212222700 U CN212222700 U CN 212222700U
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Abstract
The utility model provides a recycling system of desulfurization and denitrification waste liquid, which comprises a waste liquid generating system, an evaporative crystallization system, a flash evaporation system, a recovery system and an exhaust system which are sequentially communicated; the evaporative crystallization system is used for evaporating the waste liquid generated by the waste liquid generation system; the flash evaporation system is used for carrying out flash evaporation on the waste liquid after evaporation and crystallization; the recovery system is used for recovering materials in the flash-evaporated waste liquid; and the exhaust system is used for exhausting residual gas after the materials are recovered. The solid recycling in the waste liquid can be realized through the treatment of the system, the liquid can be circulated in the system, the complete recycling of the waste is realized, the system is simple to treat and easy to operate, no extra reagent is added, the secondary pollution is avoided, and the system has good application prospect and industrial practicability.
Description
Technical Field
The utility model belongs to the technical field of waste liquid recovery processing, concretely relates to circulation recovery system of recycling of SOx/NOx control waste liquid.
Background
With the acceleration of the industrialized process in China, harmful gases such as sulfur dioxide, oxynitride, smoke dust and the like discharged in the production process of industrial kilns and the like are increased rapidly, so that the environment is greatly damaged, the atmospheric environment is seriously polluted, and meanwhile, the respiratory system of a human body is also seriously damaged. Therefore, various denitration and desulfurization methods and devices are available at present, and SCR, wet denitration and desulfurization and the like are commonly used, wherein the wet denitration and desulfurization is also a commonly used means in the industry of denitration and desulfurization due to simple and easy process and low cost, but the wet denitration and desulfurization generates more waste liquid, which brings great difficulty to post-treatment and easily causes secondary pollution; and the water resource consumption is large. Therefore, the treatment of the wet desulfurization and denitrification waste liquid has a great influence on the wide application of the wet desulfurization and denitrification.
Disclosure of Invention
To the above problem, the utility model provides a system is recycled to circulation recovery of SOx/NOx control waste liquid recycles, can recycle the solid recovery in the waste liquid through the processing of this system, and its liquid can circulate in the system, has reached the complete recovery of discarded object, and this system handles simple, easily operation moreover, has fine industrial applicability.
The utility model is realized by the following technical proposal
A recycling system for desulfurization and denitrification waste liquid comprises a waste liquid generating system, an evaporative crystallization system, a flash evaporation system, a recovery system and an exhaust system which are sequentially communicated;
the evaporative crystallization system is used for evaporating the waste liquid generated by the waste liquid generation system; the flash evaporation system is used for carrying out flash evaporation on the waste liquid after evaporation and crystallization; the recovery system is used for recovering materials in the flash-evaporated waste liquid; and the exhaust system is used for exhausting residual gas after the materials are recovered.
Furthermore, the flash evaporation system comprises a high-efficiency centrifuge communicated with the evaporative crystallization system, a discharge hopper communicated with the high-efficiency centrifuge through a material pipeline, a screw conveyor communicated with the discharge hopper through a material pipeline, and a flash evaporation device communicated with the screw conveyor through a material pipeline; the flash evaporation device also comprises a heating box communicated with the air inlet of the flash evaporation device and a first fan communicated with the heating box.
Further, the high-efficiency centrifugal machine is communicated with a buffer tank through a liquid pipeline, and the buffer tank is communicated with a waste liquid generation system through a liquid pipeline.
Further, the flash evaporation device is a high-efficiency flash evaporation dryer.
Furthermore, the recovery system comprises a cyclone separator communicated with the flash evaporation system and a bag type dust collector communicated with a gas outlet of the cyclone separator through a material pipeline.
Further, the discharge hole of the cyclone separator is communicated with a material storage tank.
Further, the exhaust system comprises a second fan communicated with the recovery system and an exhaust cylinder communicated with the second fan.
Further, the system also comprises a heat exchanger, and the heat exchanger is communicated with the second fan.
Compared with the prior art, the utility model discloses following positive beneficial effect has
The wet desulfurization and denitrification are common methods in the field due to simple and easy operation, but the consumption of water resources and the generation of waste liquid limit the use of the method. The utility model recycles and treats the waste liquid, recycles the water in the waste liquid to the desulfurization and denitrification tower, greatly reduces the consumption of water resource, reduces the influence of wastewater discharge on the environment, and avoids the complex process of post treatment; and materials in the waste liquid are recycled, the materials contain agricultural fertilizers such as ammonium sulfate and ammonium nitrate, and can be directly used as fertilizers, so that the recycling of the materials in the desulfurization and denitrification waste liquid is realized. The whole process not only realizes the treatment of desulfurization and denitrification, but also efficiently recovers substances in the desulfurization and denitrification waste liquid, realizes better circulation in the whole process, and has good social and economic benefits.
In the whole treatment process of the system, no extra reagent is added, no extra reagent is consumed, secondary pollution is avoided, and the system has a good application prospect. Especially has good practical use effect for enterprises in the field.
The whole treatment process of the system is simple and easy to operate, the complete circulation of the system is realized, and the whole system has the advantages of low investment, low cost, smooth operation and high income.
Drawings
FIG. 1 is a schematic view of a system for recovering and recycling a desulfurization/denitrification waste liquid;
FIG. 2 is a second schematic view of a system for recovering and recycling a desulfurization/denitrification waste liquid;
the symbols in the drawings indicate that: the system comprises a waste liquid generation system 1, an evaporation crystallization system 2, a high-efficiency centrifuge 3, a blanking hopper 4, a screw conveyer 5, a high-efficiency flash dryer 6, a cyclone separator 7, a bag-type dust collector 8, a second fan 9, an exhaust funnel 10, a first fan 11, a heating box 12, a material storage tank 13, a heat exchanger 14 and a buffer tank 15; reference numeral 101 denotes a first transfer pump, 201 denotes a second transfer pump, and 1501 denotes a third transfer pump.
Detailed Description
The present invention is described in detail below with reference to the specific embodiments, so as to facilitate the understanding of the technical solutions of the present invention, but the present invention is not limited to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the utility model provides a recycling system for desulfurization and denitrification waste liquid, which comprises a waste liquid generating system, an evaporative crystallization system, a flash evaporation system, a recycling system and an exhaust system which are sequentially communicated; the evaporative crystallization system is used for evaporating the waste liquid generated by the waste liquid generation system; the flash evaporation system is used for carrying out flash evaporation on the waste liquid after evaporation and crystallization; the recovery system is used for recovering materials in the flash-evaporated waste liquid; and the exhaust system is used for exhausting residual gas after the materials are recovered.
The flash evaporation system comprises a high-efficiency centrifuge, a blanking hopper, a screw conveyor, a flash evaporation device, a first fan and a heating box, wherein the high-efficiency centrifuge, the blanking hopper, the screw conveyor and the flash evaporation device are sequentially communicated; the recovery system comprises a cyclone separator and a bag type dust collector which are communicated in sequence; the exhaust system comprises a second fan and an exhaust cylinder which are communicated. The centrifuge is preferably an efficient centrifuge, the flash evaporation device is preferably an efficient flash evaporation dryer, the heating box is preferably an electric heating box, and the efficient centrifuge and the efficient flash evaporation dryer can be all devices well known to those skilled in the art.
The waste liquid generating system is communicated with the evaporative crystallization system through a material pipeline, the evaporative crystallization system is communicated with a high-efficiency centrifugal machine of the flash evaporation system through a material pipeline, the high-efficiency centrifugal machine is communicated with a blanking hopper through a material pipeline, the blanking hopper is communicated with a spiral conveyor through a material pipeline, the spiral conveyor is communicated with a flash evaporation device through a material pipeline, a discharge port of the flash evaporation device is communicated with a cyclone separator through a material pipeline, a gas outlet of the cyclone separator is communicated with a bag type dust collector through a material pipeline, a gas outlet of the bag type dust collector is communicated with a second fan through a material pipeline, and the second fan is communicated with an exhaust funnel;
the air inlet of the flash evaporation device is also communicated with a heating box through a pipeline, and the heating box is communicated with a first fan; the discharge port of the cyclone separator is communicated with the material storage tank.
Preferably, the high-efficiency centrifuge is also communicated with a buffer tank through a liquid pipeline, and the buffer tank is communicated with the waste liquid generation system through a liquid pipeline. The waste water obtained by centrifugation is returned to the desulfurization and denitrification system for recycling, and the water resource is efficiently recovered.
Preferably, the system further comprises a heat exchanger, and the heat exchanger is communicated with the second fan. And the gas dedusted by the bag-type dust remover enters the heat exchanger by the second fan to heat water and the like, and is used as a heat source. The heat source is not only prevented from influencing the environment, but also recycled, the circulation of the whole system is realized, the efficient utilization of the whole system is achieved, and the use effect is good.
Preferably, the transfer of the system liquid is performed by means of a transfer pump.
The system treats the desulfurization and denitrification wastewater, so that the water source in the wastewater is fully recycled, the consumption of the water source is reduced, a large amount of water source is saved for the desulfurization and denitrification process, and the generation of waste is avoided; the materials in the wastewater are fully recycled, the whole process realizes complete circulation, and the method has good social and economic benefits.
The working principle of the system is as follows: conveying the waste liquid generated by wet desulfurization and denitration to an evaporative crystallization system, carrying out evaporative crystallization at normal temperature until the water content is 60-70%, then conveying the waste liquid to a high-efficiency centrifuge for centrifugal treatment (the rotating speed during centrifugation is 7500r/min), conveying the liquid obtained after centrifugation to the desulfurization and denitration system for recycling, wherein the water content in the waste material obtained by centrifugation is 35-40%, conveying the waste material to a spiral conveyor through a blanking hopper, conveying the waste material to a high-efficiency flash evaporation dryer through the spiral conveyor, reversely contacting the waste material with gas (the gas is conveyed to a heating box for heating and then is conveyed to the high-efficiency bottom) with the temperature of 100 ℃, (the gas is conveyed to the heating box for heating by a first fan) at 120 ℃, drying the waste material by the flash evaporation dryer until the water content is less than or equal to 1, discharging the top material of the high-efficiency flash evaporation and conveying the top material to a, the solid materials obtained by separation are discharged from the bottom of the cyclone separator and conveyed into the material storage tank for subsequent use, the residual gas after the materials are separated by the cyclone separator is conveyed into the bag-type dust remover for dust removal, the gas after dust removal is discharged outside the gas through the second fan and the exhaust funnel (no harmful substances exist in the gas, and no dust exists), and the dust materials collected in the bag-type dust remover can be collected into the material storage tank as recovered materials. The whole system realizes complete circulation and has high social and economic benefits.
Claims (8)
1. A recycling system of desulfurization and denitrification waste liquid is characterized by comprising a waste liquid generation system, an evaporative crystallization system, a flash evaporation system, a recovery system and an exhaust system which are sequentially communicated;
the evaporative crystallization system is used for evaporating the waste liquid generated by the waste liquid generation system;
the flash evaporation system is used for carrying out flash evaporation on the waste liquid after evaporation and crystallization;
the recovery system is used for recovering materials in the flash-evaporated waste liquid;
and the exhaust system is used for exhausting residual gas after the materials are recovered.
2. The system of claim 1, wherein the flash evaporation system comprises a high-efficiency centrifuge communicated with the evaporative crystallization system, a discharge hopper communicated with the high-efficiency centrifuge through a material pipeline, a screw conveyor communicated with the discharge hopper through a material pipeline, and a flash evaporation device communicated with the screw conveyor through a material pipeline; the flash evaporation device also comprises a heating box communicated with the air inlet of the flash evaporation device and a first fan communicated with the heating box.
3. The system of claim 2, wherein the high efficiency centrifuge is further in communication with a buffer tank via a liquid conduit, the buffer tank being in communication with the waste generation system via a liquid conduit.
4. The system of claim 2, wherein the flash apparatus is a high efficiency flash dryer.
5. The system of claim 1, wherein the recovery system comprises a cyclone in communication with the flash system, and a bag house in communication with the cyclone gas outlet via a feed conduit.
6. The system of claim 5, wherein the outlet of the cyclone separator is further in communication with a material storage tank.
7. The system of claim 1, wherein the exhaust system includes a second fan in communication with the recovery system and an exhaust stack in communication with the second fan.
8. The system of claim 1, further comprising a heat exchanger in communication with the second fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684414.1U CN212222700U (en) | 2020-04-29 | 2020-04-29 | Recycling system of desulfurization and denitrification waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684414.1U CN212222700U (en) | 2020-04-29 | 2020-04-29 | Recycling system of desulfurization and denitrification waste liquid |
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| CN212222700U true CN212222700U (en) | 2020-12-25 |
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| CN202020684414.1U Active CN212222700U (en) | 2020-04-29 | 2020-04-29 | Recycling system of desulfurization and denitrification waste liquid |
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| CN (1) | CN212222700U (en) |
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