CN215403478U - Desulfurization and denitrification flue gas washing wastewater treatment system - Google Patents
Desulfurization and denitrification flue gas washing wastewater treatment system Download PDFInfo
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- CN215403478U CN215403478U CN202121044164.6U CN202121044164U CN215403478U CN 215403478 U CN215403478 U CN 215403478U CN 202121044164 U CN202121044164 U CN 202121044164U CN 215403478 U CN215403478 U CN 215403478U
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Abstract
The utility model relates to the technical field of sewage treatment, in particular to a desulfurization and denitrification flue gas washing wastewater treatment system which comprises a regulating tank, a primary flocculation and sedimentation tank, a secondary flocculation and sedimentation tank, a tubular microfiltration device, a reverse osmosis device and a reuse water tank which are sequentially connected through pipelines, wherein the primary flocculation and sedimentation tank and the secondary flocculation and sedimentation tank are connected with a sludge tank through a sludge discharge pipeline, and the reuse water tank is communicated with the sludge discharge pipeline through a flushing pipeline. Compared with the prior art, the utility model adopts a combined treatment process of 'reaction precipitation + microfiltration + reverse osmosis', not only treats the flue gas washing wastewater to a recyclable state, realizes zero discharge of wastewater, saves water resources, and has lower investment and operation cost; and the water of the reuse water tank is directly utilized as the flushing source of the sludge discharge system and the tubular microfiltration device, the blockage of the sedimentation tank and the tubular microfiltration device is effectively prevented, the secondary pollution is avoided, the automatic flushing process is realized through the electric control system, the remote control is realized, and the personal safety is ensured.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a desulfurization and denitrification flue gas washing wastewater treatment system.
Background
With the rapid development of energy industry in China and the construction of large coal-fired power plants, the fuel consumption is continuously increased, the emission of SO2 is more and more, the air pollution caused by the emission is more and more serious, and the adoption of desulfurization measures is urgent. Control pathway of SO 2: pre-combustion desulfurization, in-combustion desulfurization, and post-combustion desulfurization, i.e., Flue Gas Desulfurization (FGD). Currently, flue gas desulfurization is considered to be the most effective way to control the emission of SO 2. Limestone-gypsum wet flue gas desulfurization is the most widely used and technically mature desulfurization process in the world. The desulfurization wastewater generated by the wet flue gas desulfurization process has a pH value of 4-6, and simultaneously contains a large amount of suspended matters (gypsum particles, SiO2, hydroxides of Al and Fe), fluorides and trace heavy metals such As As, Cd, Cr, Hg and the like. Direct discharge poses serious environmental hazards, and must be treated for discharge. Current desulfurization waste water zero release device, its structure is complicated, and design cost is high, is unfavorable for the industrialization and promotes, and sedimentation tank sludge discharge system, very easily dirty stifled pipeline can lead to the dredge pump to block up even when serious for equipment failure is many, the fortune dimension expense increases in the system operation process.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the background technology, the utility model provides a desulfurization and denitrification flue gas washing wastewater treatment system.
The technical scheme adopted by the utility model is as follows: the utility model provides a SOx/NOx control flue gas washing effluent disposal system, the key lies in: equalizing basin, one-level flocculation and precipitation pond, second grade flocculation and precipitation pond, tubular micro-filtration device, reverse osmosis unit and the retrieval and utilization pond of pipe connection in proper order, one-level flocculation and precipitation pond and second grade flocculation and precipitation pond are through arranging mud pipe connection sludge impoundment, the retrieval and utilization pond is through washing pipeline and row mud pipeline intercommunication.
Preferably, the sludge discharge pipeline comprises a first sludge pipe and a second sludge pipe, the inlet end of the first sludge pipe is communicated with the sludge outlet of the first-level flocculation sedimentation tank, the inlet end of the second sludge pipe is communicated with the sludge outlet of the second-level flocculation sedimentation tank, the outlet ends of the first sludge pipe and the second sludge pipe are communicated with the sludge tank, and the middle parts of the first sludge pipe and the second sludge pipe are communicated with the flushing pipeline.
Preferably, the flushing pipeline comprises a first flushing pipe, a second flushing pipe and a third flushing pipe, inlet ends of the first flushing pipe, the second flushing pipe and the third flushing pipe are communicated with the reuse water tank, and water outlet ends of the first flushing pipe, the second flushing pipe and the third flushing pipe are respectively communicated with the tubular microfiltration device, the first sludge pipe and the second sludge pipe.
Preferably, an electronic valve is arranged at one section of the first sludge pipe between the first-stage flocculation sedimentation tank and the second flushing pipe, and an electronic valve and a first sludge pump are arranged at one section of the first sludge pipe between the second flushing pipe and the sludge tank.
Preferably, an electronic valve is arranged at one section of the second sludge pipe, which is positioned between the second-stage flocculation sedimentation tank and the third flushing pipe, and an electronic valve and a second sludge pump are arranged at one section of the second sludge pipe, which is positioned between the third flushing pipe and the sludge tank.
Preferably, the pipeline of the primary flocculation sedimentation tank is connected with a first dosing unit, the first dosing unit comprises a liquid caustic soda pipe, a magnesium agent pipe, a coagulant pipe and a coagulant aid pipe, and the liquid caustic soda pipe, the magnesium agent pipe, the coagulant pipe and the coagulant aid pipe are respectively communicated with the primary flocculation sedimentation tank.
Preferably, the second flocculation sedimentation tank is connected with a second dosing unit through a pipeline, the second dosing unit comprises a liquid caustic soda pipe, a sodium carbonate pipe, a coagulant pipe and a chelating agent pipe, and the liquid caustic soda pipe, the sodium carbonate pipe, the coagulant pipe and the chelating agent pipe are respectively communicated with the second flocculation sedimentation tank.
Preferably, the electronic valve, the first sludge pump, the electronic valve and the second sludge pump are all electrically connected with the controller.
Has the advantages that: compared with the prior art, the desulfurization and denitrification flue gas washing wastewater treatment system provided by the utility model adopts a combined treatment process of 'reaction precipitation + microfiltration + reverse osmosis', fully utilizes the characteristics of high desalination of RO and pollution resistance of MF, treats flue gas washing wastewater to a recyclable state, realizes zero discharge of wastewater, reduces one-time investment and operation management cost, and improves the circulation multiple of circulating cooling water; water resources are saved, and investment and operation cost are low; the occupied area is small, and the capital investment is small; and directly utilize the water in reuse pond as mud discharge system and tubular micro-filtration device's washing source, effectively prevent sedimentation tank and tubular micro-filtration device jam, and can not cause secondary pollution, set up the electrical system that washes automatically, realize a key formula automation and wash the process, remove manual work field operation from, realize remote control, reduce the on-the-spot personnel and walk, guarantee personal safety.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in figure 1, a desulfurization and denitrification flue gas washing wastewater treatment system comprises a regulating tank, a first-stage flocculation sedimentation tank, a second-stage flocculation sedimentation tank, a tubular microfiltration device, a reverse osmosis device and a reuse water tank which are sequentially connected by pipelines, wherein the first-stage flocculation sedimentation tank and the second-stage flocculation sedimentation tank are connected with a sludge discharge pipeline through a sludge discharge pipeline, the reuse water tank is communicated with the sludge discharge pipeline through a flushing pipeline, the first-stage flocculation sedimentation tank is connected with a first dosing unit through a pipeline, the first dosing unit comprises a liquid caustic soda pipe, a magnesium agent pipe, a coagulant pipe and a coagulant aid pipe, the liquid caustic pipe, the magnesium agent pipe, the coagulant pipe and the coagulant aid pipe are respectively communicated with the first-stage flocculation sedimentation tank, the second-stage flocculation sedimentation tank is connected with a second dosing unit, the second dosing unit comprises a liquid caustic soda pipe, a sodium carbonate pipe, a coagulant pipe and a chelating agent pipe, and the liquid caustic soda pipe, the sodium carbonate pipe and the sodium carbonate pipe are sequentially connected with one another pipeline, and the other pipeline is connected with the first dosing unit, the second dosing unit and the second dosing unit is connected with the first dosing unit, the second dosing unit, the first dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the first dosing unit, the second dosing unit is connected with the second dosing unit, and the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the first dosing unit, the second dosing unit is connected with the first dosing unit, the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the, The coagulant pipe and the chelating agent pipe are respectively communicated with the secondary flocculation sedimentation tank.
Example 2
As shown in figure 1, a desulfurization and denitrification flue gas washing wastewater treatment system comprises a regulating tank, a first-stage flocculation sedimentation tank, a second-stage flocculation sedimentation tank, a tubular microfiltration device, a reverse osmosis device and a reuse water tank which are sequentially connected by pipelines, wherein the first-stage flocculation sedimentation tank and the second-stage flocculation sedimentation tank are connected with a sludge discharge pipeline through a sludge discharge pipeline, the reuse water tank is communicated with the sludge discharge pipeline through a flushing pipeline, the first-stage flocculation sedimentation tank is connected with a first dosing unit through a pipeline, the first dosing unit comprises a liquid caustic soda pipe, a magnesium agent pipe, a coagulant pipe and a coagulant aid pipe, the liquid caustic pipe, the magnesium agent pipe, the coagulant pipe and the coagulant aid pipe are respectively communicated with the first-stage flocculation sedimentation tank, the second-stage flocculation sedimentation tank is connected with a second dosing unit, the second dosing unit comprises a liquid caustic soda pipe, a sodium carbonate pipe, a coagulant pipe and a chelating agent pipe, and the liquid caustic soda pipe, the sodium carbonate pipe and the sodium carbonate pipe are sequentially connected with one another pipeline, and the other pipeline is connected with the first dosing unit, the second dosing unit and the second dosing unit is connected with the first dosing unit, the second dosing unit, the first dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the first dosing unit, the second dosing unit is connected with the second dosing unit, and the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the first dosing unit, the second dosing unit is connected with the first dosing unit, the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the second dosing unit, the second dosing unit is connected with the, The coagulant pipe and the chelating agent pipe are respectively communicated with the secondary flocculation sedimentation tank;
the sludge discharge pipeline comprises a sludge pipe I11 and a sludge pipe II 12, the inlet end of the sludge pipe I11 is communicated with the sludge outlet of the primary flocculation sedimentation tank, the inlet end of the sludge pipe II 12 is communicated with the sludge outlet of the secondary flocculation sedimentation tank, the outlet ends of the sludge pipe I11 and the sludge pipe II 12 are both communicated with the sludge tank, and the middle parts of the sludge pipe I11 and the sludge pipe II 12 are both communicated with the flushing pipeline;
the flushing pipeline comprises a first flushing pipe 21, a second flushing pipe 22 and a third flushing pipe 23, inlet ends of the first flushing pipe 21, the second flushing pipe 22 and the third flushing pipe 23 are communicated with the reuse water pool through a main pipe, and water outlet ends of the first flushing pipe 21, the second flushing pipe 22 and the third flushing pipe 23 are respectively communicated with a tubular microfiltration device, a first sludge pipe 11 and a second sludge pipe 12; an electronic valve A is arranged at one section of the sludge pipe I11 positioned between the primary flocculation sedimentation tank and the second flushing pipe 22, and an electronic valve B and a sludge pump I13 are arranged at one section of the sludge pipe I11 positioned between the second flushing pipe 22 and the sludge tank; an electronic valve C is arranged at one section of the second sludge pipe 12, which is positioned between the second-stage flocculation sedimentation tank and the third flushing pipe 23, and an electronic valve D and a second sludge pump 14 are arranged at one section of the second sludge pipe 12, which is positioned between the third flushing pipe 23 and the sludge tank; the first flushing pipe 21 is provided with an electronic valve E, the main pipe is provided with a circulating water pump 24, and the electronic valve A, the electronic valve B, the electronic valve C, the electronic valve D, the electronic valve E, the sludge pump I13, the sludge pump II 14 and the circulating water pump 24 are all electrically connected with the controller.
The working principle is as follows: when the system runs for a certain time and is stopped, the system is automatically flushed through the electric control system, the electronic valve B, the sludge pump I13, the electronic valve D and the sludge pump II 14 are closed, the electronic valve A, the electronic valve C, the electronic valve E and the circulating water pump 24 are opened, sediment deposited at sludge outlets at the bottoms of the primary flocculation sedimentation tank and the secondary flocculation sedimentation tank is flushed into the sedimentation tanks for regular flushing, a sludge discharge pipeline is ensured to be smooth, and a pollution layer and a colloid layer deposited on the membrane surface of the tubular microfiltration device are separated off by reverse water flow, so that the filtration performance of the membrane surface is recovered again; the automatic flushing device can also be arranged by one key, when the sludge discharge pipeline and the tubular microfiltration device are in a sewage blocking state, an automatic flushing program is started, the remote control is realized, the manual field operation is avoided, the walking of field personnel is reduced, and the personal safety is ensured. The washing water comes from the recycled fresh water treated by the reverse osmosis device, so that the energy consumption is reduced, and the resource recycling is realized.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a SOx/NOx control flue gas washing effluent disposal system which characterized in that: equalizing basin, one-level flocculation and precipitation pond, second grade flocculation and precipitation pond, tubular micro-filtration device, reverse osmosis unit and the retrieval and utilization pond of pipe connection in proper order, one-level flocculation and precipitation pond and second grade flocculation and precipitation pond are through arranging mud pipe connection sludge impoundment, the retrieval and utilization pond is through washing pipeline and row mud pipeline intercommunication.
2. The desulfurization and denitrification flue gas washing wastewater treatment system according to claim 1, characterized in that: arrange the mud pipeline and include sludge pipe (11) and sludge pipe two (12), the entrance point of sludge pipe (11) with the mud export intercommunication of one-level flocculation and precipitation pond, the entrance point of sludge pipe two (12) with the mud export intercommunication of second grade flocculation and precipitation pond, the exit end of sludge pipe (11) and sludge pipe two (12) all with the sludge pond intercommunication, the middle part of sludge pipe (11) and sludge pipe two (12) all with wash the pipeline intercommunication.
3. The desulfurization and denitrification flue gas washing wastewater treatment system according to claim 2, characterized in that: the flushing pipeline comprises a first flushing pipe (21), a second flushing pipe (22) and a third flushing pipe (23), inlet ends of the first flushing pipe (21), the second flushing pipe (22) and the third flushing pipe (23) are communicated with the reuse water tank, and water outlet ends of the first flushing pipe (21), the second flushing pipe (22) and the third flushing pipe (23) are respectively communicated with the tubular microfiltration device, the first sludge pipe (11) and the second sludge pipe (12).
4. The desulfurization and denitrification flue gas washing wastewater treatment system according to claim 2, characterized in that: one section of the first sludge pipe (11) between the first-stage flocculation sedimentation tank and the second flushing pipe (22) is provided with an electronic valve A, and one section of the first sludge pipe (11) between the second flushing pipe (22) and the sludge tank is provided with an electronic valve B and a first sludge pump (13).
5. The desulfurization and denitrification flue gas washing wastewater treatment system according to claim 4, characterized in that: one section of the second sludge pipe (12) between the second-stage flocculation sedimentation tank and the third flushing pipe (23) is provided with an electronic valve C, and one section of the second sludge pipe (12) between the third flushing pipe (23) and the sludge tank is provided with an electronic valve D and a second sludge pump (14).
6. The desulfurization and denitrification flue gas washing wastewater treatment system according to claim 5, characterized in that: the first-stage flocculation sedimentation tank pipeline is connected with a first dosing unit, the first dosing unit comprises a liquid alkali pipe, a magnesium agent pipe, a coagulant pipe and a coagulant aid pipe, and the liquid alkali pipe, the magnesium agent pipe, the coagulant pipe and the coagulant aid pipe are respectively communicated with the first-stage flocculation sedimentation tank.
7. The desulfurization and denitrification flue gas washing wastewater treatment system according to any one of claims 1 to 6, wherein: the second-stage flocculation sedimentation tank pipeline is connected with a second dosing unit, the second dosing unit comprises a liquid alkali pipe, a sodium carbonate pipe, a coagulant pipe and a chelating agent pipe, and the liquid alkali pipe, the sodium carbonate pipe, the coagulant pipe and the chelating agent pipe are respectively communicated with the second-stage flocculation sedimentation tank.
8. The desulfurization and denitrification flue gas washing wastewater treatment system according to claim 5 or 6, characterized in that: the electronic valve A, the electronic valve B, the sludge pump I (13), the electronic valve C, the electronic valve D and the sludge pump II (14) are all electrically connected with the controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121044164.6U CN215403478U (en) | 2021-05-17 | 2021-05-17 | Desulfurization and denitrification flue gas washing wastewater treatment system |
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| CN202121044164.6U CN215403478U (en) | 2021-05-17 | 2021-05-17 | Desulfurization and denitrification flue gas washing wastewater treatment system |
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| CN215403478U true CN215403478U (en) | 2022-01-04 |
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| CN202121044164.6U Active CN215403478U (en) | 2021-05-17 | 2021-05-17 | Desulfurization and denitrification flue gas washing wastewater treatment system |
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