CN210711128U - Flue gas desulfurization denitration system acid waste water recycling system - Google Patents
Flue gas desulfurization denitration system acid waste water recycling system Download PDFInfo
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- CN210711128U CN210711128U CN201921577234.7U CN201921577234U CN210711128U CN 210711128 U CN210711128 U CN 210711128U CN 201921577234 U CN201921577234 U CN 201921577234U CN 210711128 U CN210711128 U CN 210711128U
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Abstract
The utility model discloses a flue gas desulfurization denitration system acid waste water recycling system, its characterized in that: workshop waste water at first gets into the equalizing basin, gets into integration coagulating sedimentation ware after adjusting quality of water yield in the equalizing basin, the clear solution of integration coagulating sedimentation ware gets into middle pond after the filter filters, the water in middle pond gets into evaporating system, gets rid of a large amount of salts that contain in the waste water, evaporating system's crystal salt has handed over the unit of qualificating and is handled, evaporating system's comdenstion water gets into deamination reaction tank, the play water of deamination reaction tank gets into sodium hypochlorite oxidation pond and sodium hypochlorite reaction, follows the water that the sodium hypochlorite oxidation pond came out gets into the clean water basin and finally carries to the retrieval and utilization water point. Realizing the recycling of the waste water. The system is simple and reliable in operation, the cost investment of enterprises is greatly reduced, and the economic benefit and the social benefit of the enterprises are improved.
Description
Technical Field
The utility model relates to a flue gas desulfurization denitration system acid waste water recycling system belongs to the water treatment field.
Background
In the activated carbon desulfurization and denitrification process of power plant boiler flue gas, nonferrous smelting flue gas, steel plant sintering flue gas and various large and medium industrial boilers, SO in the flue gas is adsorbed by activated carbon2、NOxAnd heavy metal ions and other pollutants. The activated carbon with saturated adsorption is conveyed to a desorption tower for high-temperature desorption, and SO is absorbed in the desorption tower2When the acid gas is released in a gaseous state, some heavy metals in a gaseous state or a dust state are also carried out by the desorption gas. In order to improve the desulfurization and denitrification efficiency, ammonia with a theoretical value of 1.05-1.2 times is sprayed in the adsorption process, SO that redundant ammonia is released from the activated carbon in the high-temperature desorption process, and the desorbed waste gas is enriched with high-concentration SO2、NH4 +Pollutants such as heavy metal ions and dust generated by aging and abrasion of the activated carbon.
In order to realize the recycling of resources, the SO is rich2The desorption waste gas is sent to an acid making working section to prepare sulfuric acid. Because the desorption waste gas for preparing acid contains high-concentration SO2Besides, almost all other harmful impurities in the sintering flue gas are enriched, in order to ensure the purity of the sulfuric acid product, dilute sulfuric acid is needed to wash and purify the waste gas before acid preparation, and NH in the waste gas4 +Metal ions and dust suspension are transferred into dilute sulfuric acid. The waste acid solution generated by the washing operation is the wastewater of the activated carbon desulfurization and denitrification acid making process which needs to be treated by the application. The water quality is as follows
The total salt content of the wastewater is very high, the wastewater cannot be directly discharged or enters other systems for treatment, and the wastewater simultaneously contains chloride and fluoride with higher concentration, has strong corrosivity on equipment and needs targeted pretreatment.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model aims at providing a flue gas desulfurization denitration system acid waste water recycling system realizes the recycle of waste water.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a flue gas desulfurization denitration system acid waste water recycling system which characterized in that: workshop waste water at first gets into the equalizing basin, gets into integration coagulating sedimentation ware after adjusting quality of water yield in the equalizing basin, the clear solution of integration coagulating sedimentation ware gets into middle pond after the filter filters, the water in middle pond gets into evaporating system, gets rid of a large amount of salts that contain in the waste water, evaporating system's crystal salt has been handed over the unit of qualifications and is handled, evaporating system's comdenstion water gets into deamination reaction tank, be provided with aeration equipment in the deamination reaction tank, the play water of deamination reaction tank gets into sodium hypochlorite oxidation pond and sodium hypochlorite reaction, follows the water that the sodium hypochlorite oxidation pond came out gets into the clear water pond and finally carries to the retrieval and utilization water spot.
By adopting the scheme, the workshop incoming water enters the regulating tank, and after the water quantity and the water quality are regulated, the pump is lifted to the integrated coagulating sedimentation device, so that F, SS, heavy metals and other pollutants contained in the wastewater are removed.
And the effluent treated by the integrated coagulating sedimentation device enters a filter to further remove the particulate pollutants in the wastewater.
The effluent treated by the filter enters an intermediate water tank, and the wastewater is lifted to an evaporation system by a pump to remove a large amount of salts in the wastewater.
And (3) the condensed water treated by the evaporation system enters a deamination reaction tank, alkali is added to adjust the pH value of the wastewater to 10-11, and aeration is fully performed to remove a large amount of pollutants such as ammonia nitrogen and the like contained in the wastewater.
And (3) the effluent treated by the deamination reaction tank enters a sodium hypochlorite oxidation tank, acid is added to adjust the pH value of the wastewater to be neutral, sodium hypochlorite is added to further remove pollutants such as ammonia nitrogen and the like contained in the wastewater, and finally the effluent enters a clean water tank, and the water in the clean water tank is recycled to a recycling water point, such as raw water or other flushing water of a workshop RO system.
In the scheme, the method comprises the following steps: the water of the clean water tank is connected with a backwashing water inlet of the filter through a backwashing pump, and a backwashing water outlet of the filter is connected with the regulating tank. And back washing the filter by using a clean water tank.
In the scheme, the method comprises the following steps: and sludge of the integrated coagulator enters a sludge tank, and the sludge in the sludge tank is dewatered by a dewatering machine and then transported outside.
In the scheme, the method comprises the following steps: and the supernatant of the sludge tank and the filtrate of the dehydrator enter an adjusting tank.
Has the advantages that: the utility model discloses a flue gas desulfurization denitration system acid manufacturing waste water recycling system, waste water deposit through integration coagulating sedimentation ware, filter, evaporation, deamination and sodium hypochlorite oxidation pond oxidation finally make pollutants such as ammonia nitrogen, heavy metal in the waste water effectively get rid of, stably satisfy workshop retrieval and utilization water standard, realize the recycle of waste water. The system is simple and reliable in operation, the cost investment of enterprises is greatly reduced, and the economic benefit and the social benefit of the enterprises are improved.
Drawings
Fig. 1 is a process flow diagram of the present invention.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
example 1
The water quality of the inlet water of the flue gas desulfurization and denitrification acid making wastewater is as follows:
as shown in figure 1, the flue gas desulfurization and denitrification acid-making wastewater recycling system consists of an adjusting tank 1, an integrated coagulating sedimentation device 2, a filter 3, an intermediate water tank 4, an evaporation system 5, a deamination reaction tank 6, a sodium hypochlorite oxidation tank 7, a clean water tank 8, a sludge tank 9 and a dehydrator 10
Workshop waste water firstly enters an adjusting tank 1, enters an integrated coagulating sedimentation device 2 after the water quality and the water quantity are adjusted in the adjusting tank 1, calcium chloride is added into the integrated coagulating sedimentation device until the calcium chloride is excessive to generate calcium fluoride precipitate, alkali is added to adjust the pH value of 10-11, PAC and PAM are added until large alum floc is generated, and pollutants such as F, SS, ammonia nitrogen, heavy metals and the like contained in the waste water are removed. The sludge of the integrated coagulating sedimentation device 2 enters a sludge tank 9, and the sludge in the sludge tank 9 is dewatered by a dewatering machine 10 and then transported out. The supernatant of the sludge tank 9 and the filtrate of the dehydrator 10 enter a regulating tank.
Clear liquid of the integrated coagulating sedimentation device 2 enters an intermediate water tank 4 after being filtered by a filter 3, the filter 3 is used for further removing particulate matters, and water in the intermediate water tank 4 is pumped into an evaporation system 5 by a pump to remove a large amount of salts contained in the wastewater. The method comprises the following steps of treating crystal salt of an evaporation system 5 with qualified units, feeding condensate water of the evaporation system 5 into a deamination reaction tank 6, arranging an aeration device in the deamination reaction tank 6, adding alkali into the deamination reaction tank 6 to adjust the pH value of wastewater to 10-11, and fully aerating to remove a large amount of pollutants such as ammonia nitrogen contained in the wastewater.
The effluent of the deamination reaction tank 6 enters a sodium hypochlorite oxidation tank 7, acid is added into the sodium hypochlorite oxidation tank 7 to adjust the pH value of the wastewater to be neutral, and sodium hypochlorite is added to further remove pollutants such as ammonia nitrogen contained in the wastewater and play a role in sterilization. And the water from the sodium hypochlorite oxidation tank 6 enters a clean water tank 8 and is finally conveyed to a reuse water point. The water of the clean water tank 8 is connected with the back washing water inlet of the filter 3 through a back washing pump, and the back washing water outlet of the filter 3 is connected with the regulating tank 1.
Finally, the quality of the discharged water treated by the system can stably reach the standard of the reuse water formulated in a workshop, and the quality of the discharged water meets the following requirements.
| Serial number | Name (R) | Unit of | Number of |
| 1 | Ammonia nitrogen | mg/ |
10 |
| 2 | pH | 6-9 | |
| 3 | Total mercury | mg/L | ＜0.05 |
| 4 | Iron | mg/L | ＜10 |
| 5 | Lead (II) | mg/L | ＜1 |
| 6 | Calcium carbonate | mg/L | ＜100 |
| 7 | Total dissolved solids | mg/L | ＜500 |
The effluent quality does not meet the requirements of the emission standard of pollutants for the steel industry GB13456-2012, but the main indexes except ammonia nitrogen are all better than the tap water quality, and the effluent can be recycled according to the water balance of a plant area and the water consumption condition of each workshop.
The present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. The utility model provides a flue gas desulfurization denitration system acid waste water recycling system which characterized in that: workshop waste water at first gets into the equalizing basin, gets into integration coagulating sedimentation ware after adjusting quality of water yield in the equalizing basin, the clear solution of integration coagulating sedimentation ware gets into middle pond after the filter filters, the water in middle pond gets into evaporating system, gets rid of a large amount of salts that contain in the waste water, evaporating system's crystal salt has been handed over the unit of qualifications and is handled, evaporating system's comdenstion water gets into deamination reaction tank, be provided with aeration equipment in the deamination reaction tank, the play water of deamination reaction tank gets into sodium hypochlorite oxidation pond and sodium hypochlorite reaction, follows the water that the sodium hypochlorite oxidation pond came out gets into the clear water pond and finally carries to the retrieval and utilization water spot.
2. The flue gas desulfurization and denitrification acid-making wastewater recycling system according to claim 1, characterized in that: the water of the clean water tank is connected with a backwashing water inlet of the filter through a backwashing pump, and a backwashing water outlet of the filter is connected with the regulating tank.
3. The flue gas desulfurization and denitrification acid-making wastewater recycling system according to claim 1 or 2, characterized in that: and sludge of the integrated coagulator enters a sludge tank, and the sludge in the sludge tank is dewatered by a dewatering machine and then transported outside.
4. The flue gas desulfurization and denitrification acid-making wastewater recycling system according to claim 3, characterized in that: and the supernatant of the sludge tank and the filtrate of the dehydrator enter an adjusting tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921577234.7U CN210711128U (en) | 2019-09-20 | 2019-09-20 | Flue gas desulfurization denitration system acid waste water recycling system |
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| CN201921577234.7U CN210711128U (en) | 2019-09-20 | 2019-09-20 | Flue gas desulfurization denitration system acid waste water recycling system |
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| CN210711128U true CN210711128U (en) | 2020-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112897670A (en) * | 2021-01-29 | 2021-06-04 | 江西晶昊盐化有限公司 | Salt production condensate water deamination method and equipment |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112897670A (en) * | 2021-01-29 | 2021-06-04 | 江西晶昊盐化有限公司 | Salt production condensate water deamination method and equipment |
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Effective date of registration: 20220930 Address after: 31-a3, Tower B, 2 Nanping West Road, Nan'an District, Chongqing 400060 Patentee after: CHONGQING JIERUN TECHNOLOGY Co.,Ltd. Address before: 400015 2-5, No.4, jialingqiao West Village, Yuzhong District, Chongqing Patentee before: Chongqing Si Tong Technology Co.,Ltd. |