CN214735046U - Acid-making wastewater treatment and recovery system applied to activated carbon dry-method flue gas treatment device - Google Patents
Acid-making wastewater treatment and recovery system applied to activated carbon dry-method flue gas treatment device Download PDFInfo
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Abstract
The utility model discloses an acid-making wastewater treatment and recovery system applied to an active carbon dry flue gas treatment device, which relates to the technical field of sintering plant active carbon dry method integrated flue gas comprehensive treatment, and comprises an adjusting tank, a reaction tank and a reuse tank, wherein the adjusting tank is communicated with a wastewater inlet pipe for storing acid-containing and ammonia-containing wastewater, and is connected with the reaction tank through a pipeline, and the reaction tank is respectively connected with the reuse tank, an automatic lime powder feeding machine, a deamination agent feeding device, an air blower and an induced draft fan through pipelines; the acid-making wastewater in the flue gas desulfurization and denitrification device can be properly treated under the conditions of simple treatment process flow and lower treatment cost, the wastewater and the waste ammonia gas can be recycled, the operation is stable, and the operation cost is low.
Description
Technical Field
The utility model relates to a sintering plant active carbon dry process integration flue gas is synthesized and is administered technical field, concretely relates to be applied to sour waste water treatment recovery system of active carbon dry process integration flue gas comprehensive treatment device.
Background
In recent years, haze in most areas of China is increasingly serious, and the national environmental protection department discharges SO in the exhaust flue gas of enterprises such as sintering plants and power plants2The content of pollutants such as NOx also puts more stringent demands on the content. At present, SO in flue gas is removed by adopting an active carbon dry method integrated device2Processes for pollutants such as NOx have an increasing market share. SO in flue gas2When pollutants are adsorbed by the activated carbon, acid gas desorbed in the regeneration process of the activated carbon is sent to an acid making device for making sulfuric acid, the acid making process needs to discharge acid sewage regularly, and ammonia gas with a certain concentration is sprayed into flue gas in the denitration reaction, so that the discharged acid water contains high-concentration NH4+。
The acidic water contains H2SO43% -5% of NH4 +10000-50000 mg/L and Ca2+、Mg2+、Cl-、F-And heavy metal ions, and solid particles such as ash and activated carbon powder. The wastewater has complex components, high pollutant concentration and small water amount, and how to treat the wastewater is a troublesome problem faced by the existing activated carbon dry-method flue gas desulfurization and denitrification device.
At present, one way of treating the wastewater is to add alkali to neutralize the wastewater to be neutral and send the wastewater to a factory sewage treatment plant for treatment. The method has two problems, one is that the wastewater has high pollutant concentration and contains heavy metal ions, so that the wastewater is easy to impact the original system of a sewage treatment plant and influences the quality of effluent water; and secondly, some factories do not have sewage treatment plants, so that the factories do not have accommodation and can only be transported and treated, and the cost is higher. The second method is to evaporate and crystallize the waste water to achieve zero emission, and the method also has a plurality of problems, firstly, because the waste water has complex components, pretreatment is needed before evaporation, and the problem that the evaporator is easy to scale and block due to unqualified pretreatment is easily caused; secondly, the evaporation process has high energy consumption and high operation cost; thirdly, the solid salt generated after evaporation contains heavy metals, belongs to hazardous waste and needs special treatment.
SUMMERY OF THE UTILITY MODEL
For solving exist not enough among the prior art, the utility model provides a be applied to sour waste water treatment recovery system of active carbon dry process flue gas treatment device makes among the flue gas desulfurization denitrification facility system sour waste water can obtain proper treatment under simple processing technology flow, lower treatment cost to realize waste water and useless ammonia retrieval and utilization, the operation is stable, the running cost is low.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides a be applied to system sour effluent disposal recovery system of active carbon dry process flue gas treatment device, includes equalizing basin, reaction tank, retrieval and utilization pond, the equalizing basin switch-on waste water inlet tube for the storage contains acid and contains ammonia wastewater, and it is connected with the reaction tank through the pipeline, and the reaction tank is connected through pipeline and retrieval and utilization pond, lime powder automatic feeder, deamination agent charge device, air-blower, draught fan respectively.
Further, the equalizing basin is the underground water pond, adopts acidproof concrete cell body, and the cell body top is equipped with corrosion-resistant pond top cap, is equipped with equalizing basin agitator and equalizing basin drain pump in it, and the equalizing basin drain pump is used for being connected with the reaction tank, carries waste water to the reaction tank in.
Further, the reaction tank is underground formula pond, adopts the concrete cell body, and the cell body top is equipped with corrosion-resistant top of the pool cover, and it divide into the same reaction tank an of structure and reaction tank b, all is equipped with the reaction tank drain pump in reaction tank an and the reaction tank b, and the reaction tank drain pump is used for being connected with the retrieval and utilization pond, carries the waste water after finishing the reaction in the reaction tank to the retrieval and utilization pond.
Furthermore, the bottoms of the reaction tank a and the reaction tank b are respectively provided with a perforated air distribution pipe for uniformly dispersing air blown by the air blower into water.
Further, the reuse water tank is an underground water tank, a concrete tank body is adopted, a corrosion-resistant tank top cover is arranged at the top of the tank body, a reuse water tank stirrer and a reuse water tank drainage pump are arranged in the tank body, the reuse water tank drainage pump is communicated with the sintering raw material area water tank, and water in the reuse water tank is conveyed to the sintering raw material area for reuse.
Furthermore, each pipeline is provided with an electric valve.
Further, the draught fan is communicated with the ammonia dilution fan through a pipeline, and the sucked ammonia air-fuel mixture is conveyed to the ammonia dilution fan.
Furthermore, a thermometer, a flow meter, a pressure meter and an ammonia gas concentration monitoring instrument are respectively arranged on a connecting pipeline between the induced draft fan and the ammonia dilution fan.
Has the advantages that: (1) the treatment process is simple, the occupied area is small, and the operation and the control are convenient; (2) steam is not consumed in the treatment process, so that the aim of saving energy is fulfilled; (3) the electric equipment is less, the power is low, and the electric energy is saved; (4) compared with an ammonia nitrogen stripping tower, the blockage probability of the equipment structure is greatly reduced; (5) the treated effluent can be recycled by adopting a simple treatment process flow, so that the problems of complicated process links and difficult standard discharge of the effluent in the traditional treatment method are solved; (6) the ammonia gas removed from the wastewater can be recycled, so that secondary pollution is avoided; (7) the whole device has small investment and low operating cost;
the utility model discloses waste water treatment recovery system has not only improved sewage treatment's efficiency, has reached the purpose that waste water waste gas can the retrieval and utilization, has still practiced thrift capital construction cost and working costs, has high practical value.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Reference numbers in the figures: 1-regulating reservoir, 2-reaction reservoir a, 3-reaction reservoir b, 4-reuse reservoir, 5-regulating reservoir stirrer, 6-regulating reservoir drainage pump, 7-lime powder automatic feeder, 8-deamination agent dosing device, 9-blower, 10-draught fan, 11-reaction reservoir drainage pump, 12-perforated gas distribution pipe, 13-reuse reservoir stirrer, 14-reuse reservoir drainage pump and 15-electric valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
A system for treating and recycling acid-making wastewater applied to an activated carbon dry flue gas treatment device comprises an adjusting tank 1, a reaction tank and a reuse tank 4, wherein the adjusting tank 1 is communicated with a wastewater inlet pipe and used for storing wastewater containing acid and ammonia, and is connected with the reaction tank through a pipeline, and the reaction tank is respectively connected with the reuse tank 4, an automatic lime powder feeder 7, a deaminating agent dosing device 8, an air blower 9 and an induced draft fan 10 through pipelines; each pipeline is provided with an electric valve 15, and interlocking or remote start-stop control of the valves can be realized.
The adjusting tank 1 is an underground water tank and is an acid-resistant concrete tank body, the top of the tank body is provided with a corrosion-resistant tank top cover, an adjusting tank stirrer 5 and an adjusting tank drainage pump 6 are arranged in the tank body, and the adjusting tank stirrer 5 is used for stirring and homogenizing wastewater and preventing solid particles from depositing at the bottom of the tank; and the adjusting tank drainage pump 6 is used for being connected with the reaction tank and conveying the wastewater into the reaction tank. Preferably, the adjusting tank stirrer 5 and the adjusting tank draining pump 6 are both made of wear-resistant and corrosion-resistant materials.
The reaction tank is an underground water tank, a concrete tank body is adopted, a corrosion-resistant tank top cover is arranged at the top of the tank body and is divided into a reaction tank a2 and a reaction tank b3 which are identical in structure, the reaction tank a2 and the reaction tank b3 are both connected with an automatic lime powder feeder 7, the automatic lime powder feeder 7 feeds quicklime powder into the reaction tank, and the pH value of wastewater in the tank is adjusted to 11-12. The reaction tank a2 and the reaction tank b3 are both connected with a deamination agent dosing device 8, and the deamination agent dosing device 8 adds a denitrification agent into the tank to accelerate the generation of free NH3Escaping from the water. Reaction tank drain pumps 11 are arranged in the reaction tanks a2 and b3, the reaction tank drain pumps 11 are used for being connected with the reuse water tank 4, and waste water after reaction in the reaction tanks is conveyed to the reuse water tank 4. Perforated air distribution pipes 12 are arranged at the bottoms of the reaction tank a2 and the reaction tank b3 respectively and are used for uniformly dispersing air blown by the air blower 9 into water and accelerating Ca (OH)2And NH4 +Reaction to free NH3. The reaction tank a2 and the reaction tank b3 are both connected with an induced draft fan 10, the induced draft fan 10 is communicated with an ammonia dilution fan through a pipeline, and ammonia air mixture gas sucked out from the reaction tank a2 and the reaction tank b3 is conveyed to the ammonia dilution fan, so that ammonia gas generated by reaction can be utilized; a temperature meter, a flow meter, a pressure meter and an ammonia gas concentration monitoring instrument are respectively arranged on a connecting pipeline between the induced draft fan 10 and the ammonia dilution fan, and parameters of ammonia-air mixture delivered to the ammonia dilution fan are monitored.
The recycling pool 4 is an underground pool, a concrete pool body is adopted, a corrosion-resistant pool top cover is arranged at the top of the pool body, a recycling pool stirrer 13 and a recycling pool draining pump 14 are arranged in the pool body, and the recycling pool stirrer 13 is used for stirring recycling water to prevent solid particles from depositing at the bottom of the pool; the reuse water tank and the drainage pump 14 are communicated with the sintering raw material area water tank, and water in the reuse water tank 4 is conveyed to the sintering raw material area for reuse. The effluent water in the reuse water tank 4 is sent to a sintering raw material area to be used for sintering raw material proportioning, and lime added into the wastewater is one of the sintering raw materials.
Preferably, the reaction tank drain pump 11 and the reuse tank drain pump 14 are both vertical screw pumps.
As shown in fig. 1, the acid-making wastewater treatment and recycling system in the activated carbon dry flue gas desulfurization and denitration device of the sintering (pelletizing) plant comprises an adjusting tank 1 connected with a wastewater treatment water inlet pipe, a reaction tank a2 and a reaction tank b3 which are respectively connected with the adjusting tank 1, and a recycling tank 4 connected with the reaction tank a2 and the reaction tank b 3.
Wastewater discharged by an acid making device automatically flows into an adjusting tank 1, an adjusting tank stirrer 5 and an adjusting tank drainage pump 6 are arranged in the adjusting tank 1, and the adjusting tank drainage pump 6 is used for draining 6m within 10min every 3h3The wastewater is sent to a reaction tank a2 or a reaction tank b 3. After wastewater enters a reaction tank, quicklime powder is added into the reaction tank by a lime powder automatic feeder 7, the pH value in the tank is adjusted to 11-12, meanwhile, an air blower 9 starts to blow air into the reaction tank, the blown air is uniformly distributed in water through a tank bottom perforated air distribution pipe 12, and Ca (OH) is accelerated2And NH4+Reaction to free NH3. Meanwhile, deamination agent dosing device 8 adds deamination agent into the tank to accelerate the generation of ammoniaFrom NH3Escaping from the water. NH escaped from the reaction tank3The mixture with air is sucked out by a draught fan 10, pressurized and then sent to an ammonia dilution fan. After the wastewater is reacted for 6 hours in the reaction tank, the water in the tank is sent to the reuse water tank 4 within 10 minutes by a drainage pump 11 of the reaction tank. The water in the reuse water tank 4 is sent to the sintering plant raw material area by the reuse water tank drainage pump 14 under the stirring of the reuse water tank stirrer 13.
Example 2
The method for making the ammonia concentration of the ammonia-air mixed gas sent to the ammonia dilution fan relatively uniform comprises the following steps:
initial NH4 after wastewater enters a reaction tank+High concentration, reaction to generate NH3The reaction rate is high, so the ammonia concentration of the ammonia-air mixed gas discharged by the draught fan 10 is higher 3 hours before the reaction starts. In order to make the ammonia concentration in the ammonia-air mixed gas sent to the ammonia dilution fan relatively uniform, water starts to enter the reaction tank b3 3h after the reaction in the reaction tank a2 starts, the reaction tank a2 is in a slow reaction period and the reaction tank b3 is in a fast reaction period within 4-6 h, and after the ammonia gases escaping from the two reaction tanks are mixed, the ammonia concentration in the ammonia-air mixed gas led out by the induced draft fan 10 can be relatively uniform. After the reaction is finished in the 6 th hour, the reaction process of the reaction tank a2 is finished, water in the reaction tank is sent to the reuse water tank 4 by the reaction tank drainage pump 11, the reaction tank a2 restarts water inlet and enters the next rapid reaction period, the reaction tank b3 enters the slow reaction period, and after the gases escaping from the two reaction tanks are mixed, the ammonia concentration in the ammonia-air mixed gas led out by the induced draft fan 10 can be relatively uniform. By analogy, the reaction process is carried out by alternately feeding water into the reaction tank a2 and the reaction tank b3 every 3 hours.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (8)
1. The utility model provides a be applied to system sour effluent disposal recovery system of active carbon dry process flue gas treatment device, a serial communication port, including equalizing basin (1), reaction tank, retrieval and utilization pond (4), equalizing basin (1) switch-on waste water inlet tube for it contains the acid ammonia wastewater to retrieve and store up, and it is connected with the reaction tank through the pipeline, and the reaction tank is connected through pipeline and retrieval and utilization pond (4), lime powder automatic feeder (7), deamination agent charge device (8), air-blower (9), draught fan (10) respectively.
2. The system for treating and recycling acid-making wastewater applied to the activated carbon dry flue gas treatment device according to claim 1, wherein the adjusting tank (1) is an underground water tank, an acid-resistant concrete tank body is adopted, a corrosion-resistant tank top cover is arranged at the top of the tank body, an adjusting tank stirrer (5) and an adjusting tank drainage pump (6) are arranged in the adjusting tank, and the adjusting tank drainage pump (6) is used for being connected with the reaction tank to convey wastewater into the reaction tank.
3. The system for treating and recycling acid-making wastewater applied to the activated carbon dry-method flue gas treatment device according to claim 1, wherein the reaction tank is an underground water tank, a concrete tank body is adopted, a corrosion-resistant tank top cover is arranged at the top of the tank body, the reaction tank is divided into a reaction tank a (2) and a reaction tank b (3) which are identical in structure, reaction tank drainage pumps (11) are arranged in the reaction tank a (2) and the reaction tank b (3), the reaction tank drainage pumps (11) are connected with a reuse water tank (4), and wastewater after reaction in the reaction tank is conveyed to the reuse water tank (4).
4. The acid making wastewater treatment and recovery system applied to the activated carbon dry method flue gas treatment device according to claim 3, wherein the bottoms of the reaction tank a (2) and the reaction tank b (3) are respectively provided with a perforated gas distribution pipe (12) for dispersing air blown by the blower (9) into water.
5. The system for treating and recycling acid-making wastewater applied to the activated carbon dry-method flue gas treatment device according to claim 1, wherein the reuse tank (4) is an underground tank, a concrete tank body is adopted, a corrosion-resistant tank top cover is arranged at the top of the tank body, a reuse tank stirrer (13) and a reuse tank drainage pump (14) are arranged in the reuse tank, the reuse tank drainage pump (14) is communicated with a sintering raw material area tank, and water in the reuse tank (4) is conveyed to the sintering raw material area for reuse.
6. The acid-making wastewater treatment and recovery system applied to the activated carbon dry flue gas treatment device according to claim 1, wherein each pipeline is provided with an electric valve (15).
7. The acid making wastewater treatment and recovery system applied to the activated carbon dry flue gas treatment device according to claim 1, wherein the induced draft fan (10) is communicated with the ammonia dilution fan through a pipeline, and conveys the sucked ammonia-air mixed gas to the ammonia dilution fan.
8. The system for treating and recovering the acid-making wastewater applied to the activated carbon dry-method flue gas treatment device according to claim 7, wherein a temperature meter, a flow meter, a pressure meter and an ammonia gas concentration monitoring instrument are respectively arranged on a connecting pipeline between the induced draft fan (10) and the ammonia dilution fan.
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| CN202120930435.1U CN214735046U (en) | 2021-04-30 | 2021-04-30 | Acid-making wastewater treatment and recovery system applied to activated carbon dry-method flue gas treatment device |
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| CN202120930435.1U CN214735046U (en) | 2021-04-30 | 2021-04-30 | Acid-making wastewater treatment and recovery system applied to activated carbon dry-method flue gas treatment device |
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