CN213771706U - Sewage filtering treatment device for industrial boiler desulfurization - Google Patents
Sewage filtering treatment device for industrial boiler desulfurization Download PDFInfo
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- CN213771706U CN213771706U CN202022727946.1U CN202022727946U CN213771706U CN 213771706 U CN213771706 U CN 213771706U CN 202022727946 U CN202022727946 U CN 202022727946U CN 213771706 U CN213771706 U CN 213771706U
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Abstract
The utility model discloses a sewage filtering treatment device for desulfurization of an industrial boiler, which comprises a primary sewage filtering treatment system connected with a desulfurization device, wherein a secondary sewage filtering treatment system is connected with the water outlet end of the primary sewage filtering treatment system, and the structure of the secondary sewage filtering treatment system is the same as that of the primary sewage filtering treatment system; the primary sewage filtering treatment system comprises a waste water evaporating pot connected with the desulfurization device, a waste heat utilization system is communicated with the air outlet end of the waste water evaporating pot, and the air outlet end of the waste heat utilization system is communicated with a boiler flue gas conveying pipeline; the water outlet end of the wastewater evaporating pot is sequentially communicated with a reaction pot, a solid-liquid separator, a neutralization tank and a filter tank, and the water outlet end of the filter tank is connected with the water inlet end of the wastewater evaporating pot in the secondary sewage filtering treatment system. The utility model combines the steam concentration evaporation method and the chemical precipitation method, and adopts the mode of wastewater multi-stage treatment, thereby realizing the high-efficiency treatment of the desulfurization wastewater.
Description
Technical Field
The utility model relates to a desulfurization waste water treatment technical field, more specifically relates to a sewage filtration treatment device for industrial boiler desulfurization.
Background
The boiler is an energy conversion device, hot water or steam generated in the boiler can directly provide heat energy required by industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. A boiler for supplying hot water is called a hot water boiler, and is mainly used in life and has a small amount of application in industrial production.
Smoke and SO discharged in large quantity from industrial boiler2And NOxAnd the like are one of the main sources of the atmospheric pollutants in China. In order to control the pollution of the flue gas to the atmosphere, the flue gas exhausted from the atmosphere needs to be subjected to desulfurization and dust removal treatment. The most extensive desulfurization technology at the present stage is limestone-gypsum wet flue gas desulfurization, in order to ensure the safe operation of equipment, a certain amount of desulfurization wastewater with complex components needs to be discharged periodically in the desulfurization process, the water quality is weakly acidic, the content of suspended matters is up to tens of thousands mg/L, the salt content is up to 25000-55000 mg/L, and a large amount of Cl is contained－、F－，SO3 2-、SO4 2-、Ca2+、Mg2+Plasma and suspended matters, such As Chemical Oxygen Demand (COD), fluoride, nitrite, heavy metals (As, Pb, Hg, Cd, Cr, Ni, Co, Zn and the like) exceed standards, are easy to scale and have strong corrosivity, and must be discharged after treatment.
Therefore, it is very important to develop a device for treating desulfurization waste water.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a sewage filtration treatment device for industrial boiler desulfurization is provided to realize the high-efficient processing to desulfurization waste water, guarantee to handle back waste water and realize emission standard.
In order to solve the technical problem, the utility model adopts the following technical proposal.
The sewage filtering treatment device for industrial boiler desulfurization comprises a primary sewage filtering treatment system connected with a desulfurization device and used for performing primary treatment on desulfurization wastewater, wherein a water outlet end of the primary sewage filtering treatment system is connected with a secondary sewage filtering treatment system used for performing secondary treatment on the desulfurization wastewater, and the structure of the secondary sewage filtering treatment system is the same as that of the primary sewage filtering treatment system;
the primary sewage filtering treatment system comprises a wastewater evaporating pot which is connected with the desulfurization device and is used for evaporating and concentrating the introduced desulfurization wastewater, a waste heat utilization system which is used for utilizing the waste heat in the steam is communicated with the gas outlet end of the wastewater evaporating pot, and the gas outlet end of the waste heat utilization system is communicated with a boiler flue gas conveying pipeline; the water outlet end of the wastewater evaporation tank is sequentially communicated with a reaction tank for adding a medicament to enable the concentrated desulfurization wastewater to generate precipitation reaction, a solid-liquid separator for performing solid-liquid separation on the concentrated desulfurization wastewater after the precipitation reaction, a neutralization tank for adjusting the pH value of the desulfurization wastewater after the solid-liquid separation and a filter tank for filtering the desulfurization wastewater after the pH value is adjusted, and the water outlet end of the filter tank is connected with the water inlet end of the wastewater evaporation tank in the secondary sewage filtration treatment system.
The technical scheme is further optimized, wherein the air outlet end of the wastewater evaporation tank is communicated with a communicated waste heat utilization system through a steam air outlet pipe; the waste heat utilization system comprises a steam heat exchange box, a heat supply network water inlet pipe for introducing cooling water, a heat exchange pipe communicated with the heat supply network water inlet pipe and a heat supply network water outlet pipe communicated with the other end of the heat exchange pipe, wherein the heat supply network water inlet pipe and the heat supply network water outlet pipe are arranged outside the steam heat exchange box, and the heat exchange pipe is arranged inside the steam heat exchange box; the steam heat exchange box is communicated with a boiler flue gas conveying pipeline through an exhaust pipeline, and a valve is arranged on the exhaust pipeline.
Further optimize technical scheme, the heat exchange tube sets up to the great wall type.
According to the technical scheme, a steam circulating system for inputting the steam in the steam heat exchange box into the wastewater evaporation tank again for evaporation is further arranged between the steam heat exchange box and the wastewater evaporation tank.
Further optimize technical scheme, steam circulation system is provided with the circulation delivery pump including the circulation conveyer pipe that the intercommunication set up between steam heat transfer case lateral wall and waste water evaporating pot lateral wall top on the circulation conveyer pipe.
According to the technical scheme, the water outlet end of the wastewater evaporation tank is communicated with the reaction tank through a wastewater outlet pipe, and a first delivery pump is arranged on the wastewater outlet pipe.
According to the technical scheme, the reaction tank is communicated with the solid-liquid separator through a reaction tank liquid discharge pipe, the solid-liquid separator is communicated with the neutralization tank through a solid-liquid separator liquid discharge pipe, the solid-liquid separator discharges precipitates through a precipitate discharge pipe arranged at the bottom end of the solid-liquid separator, the neutralization tank is communicated with the filter tank through a neutralization tank liquid discharge pipe, and the filter tank is communicated with the water inlet end of a wastewater evaporation tank in the secondary sewage filtration treatment system through a filter tank liquid discharge pipe; the reaction tank liquid discharge pipe, the solid-liquid separator liquid discharge pipe, the neutralization tank liquid discharge pipe and the filter tank liquid discharge pipe are respectively provided with a second conveying pump; and a discharge pump is arranged on the sediment discharge pipe.
According to the technical scheme, a plurality of layers of filter screens are horizontally arranged in the filter box, the neutralizing box liquid discharge pipe is communicated with the top end of the filter box, and the filter box liquid discharge pipe is communicated with the bottom end of the filter box.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses combine together steam concentration evaporation method and chemical precipitation method to adopt waste water multi-stage treatment's mode, realized the high-efficient processing to desulfurization waste water, guaranteed to handle back waste water and realized emission standard.
The utility model discloses waste water evaporating pot among the one-level sewage filtration treatment system evaporates desulfurization waste water, desulfurization waste water steam after the evaporation can directly be discharged into boiler flue gas pipeline after carrying out the heat transfer in, desulfurization waste water loops through the retort after will concentrating again, the solid-liquid separation ware, the neutralization case, the rose box, carry out precipitation reaction respectively, solid-liquid separation, neutralization reaction, filter, desulfurization waste water after will handling again lets in and carries out above-mentioned process in the second grade sewage filtration treatment system, and then realized desulfurization waste water's high-efficiency processing.
The utility model discloses the desulfurization waste water steam after will evaporating enters into steam heat transfer incasement through the steam outlet duct for the cooling water that desulfurization waste water steam and heat exchange tube let in carries out the heat transfer, has realized waste heat utilization's function.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1. the system comprises a waste water evaporation tank, 11, a steam outlet pipe, 12, a waste water outlet pipe, 13, a first conveying pump, 2, a waste heat utilization system, 21, a steam heat exchange box, 22, a heat exchange pipe, 23, a heat supply network water inlet pipe, 24, a heat supply network water outlet pipe, 3, a steam circulation system, 31, a circulation conveying pipe, 32, a circulation conveying pump, 4, an exhaust pipeline, 6, a waste water treatment system, 61, a reaction tank, 611, a reaction tank liquid discharge pipe, 62, a solid-liquid separator, 621, a precipitate discharge pipe, 622, a discharge pump, 623, a solid-liquid separator liquid discharge pipe, 63, a neutralization box, 631, a neutralization box liquid discharge pipe, 64, a filter box, 641, a filter screen, 642, a filter box liquid discharge pipe, 65 and a second conveying pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A sewage filtering treatment device for desulfurization of an industrial boiler is shown in a combined figure 1 and comprises a primary sewage filtering treatment system and a secondary sewage filtering treatment system. The primary sewage filtering treatment system is connected with the desulfurization device and is used for primary treatment of desulfurization wastewater. The water outlet end of the first-level sewage filtering treatment system is connected with a second-level sewage filtering treatment system, the second-level sewage filtering treatment system is used for carrying out secondary treatment on the desulfurization wastewater, and the structure of the second-level sewage filtering treatment system is the same as that of the first-level sewage filtering treatment system.
One-level sewage filtration treatment system includes and is connected waste water evaporating pot 1 with desulphurization unit, and waste water evaporating pot 1 is used for carrying out evaporative concentration to the desulfurization waste water that lets in, and waste water evaporating pot 1's the end intercommunication of giving vent to anger is provided with waste heat utilization system 2, and waste heat utilization system 2 is arranged in utilizing the waste heat in the steam, and waste heat utilization system 2's the end of giving vent to anger is linked together with boiler flue gas pipeline. The water outlet end of the waste water evaporating pot 1 is communicated with a waste water treatment system 6.
The wastewater treatment system 6 comprises a reaction tank 61, a solid-liquid separator 62, a neutralization tank 63 and a filter tank 64 which are sequentially communicated, the reaction tank 61 is used for adding medicines to enable concentrated desulfurization wastewater to generate precipitation reaction, the solid-liquid separator 62 is used for performing solid-liquid separation on the concentrated desulfurization wastewater after the precipitation reaction, the neutralization tank 63 is used for adjusting the pH value of the desulfurization wastewater after the solid-liquid separation, the filter tank 64 is used for filtering the desulfurization wastewater after the pH value is adjusted, and the water outlet end of the filter tank 64 is connected with the water inlet end of a wastewater evaporation tank in the secondary wastewater filtration treatment system.
The air outlet end of the waste water evaporating pot 1 is communicated with the communicated waste heat utilization system 2 through a steam air outlet pipe 11. The waste heat utilization system 2 comprises a steam heat exchange box 21, a heat supply network water inlet pipe 23, a heat exchange pipe 22 and a heat supply network water outlet pipe 24. The heat supply network water inlet pipe 23 is used for introducing cooling water, the heat exchange pipe 22 is communicated with the heat supply network water inlet pipe 23, the heat supply network water outlet pipe 24 is communicated with the other end of the heat exchange pipe 22, the heat supply network water inlet pipe 23 and the heat supply network water outlet pipe 24 are arranged outside the steam heat exchange box 21, the heat supply network water inlet pipe 23 and the heat supply network water outlet pipe 24 are respectively connected with two ends of a heat supply network user, and the heat supply network user to be heated can enter the heat exchange pipe 22 through the heat supply network water inlet pipe 23. The heat exchange pipe 22 is disposed inside the steam heat exchange tank 21. The steam heat exchange box 21 is communicated with a boiler flue gas conveying pipeline through an exhaust pipeline 4, and a valve is arranged on the exhaust pipeline 4.
The heat exchange tube 22 is arranged in a great wall shape, so that the heat exchange area of the heat exchange tube 22 and steam is increased.
A steam circulation system 3 is further arranged between the steam heat exchange box 21 and the wastewater evaporation tank 1, and the steam circulation system 3 is used for inputting the steam in the steam heat exchange box 21 into the wastewater evaporation tank 1 again for evaporation.
The steam circulation system 3 comprises a circulation conveying pipe 31 which is communicated and arranged between the side wall of the steam heat exchange box and the top end of the side wall of the waste water evaporation tank, and a circulation conveying pump 32 is arranged on the circulation conveying pipe 31.
The water outlet end of the waste water evaporating pot 1 is communicated with the reaction pot 61 through a waste water outlet pipe 12, and a first conveying pump 13 is arranged on the waste water outlet pipe 12.
The reaction tank 61 is communicated with the solid-liquid separator 62 through a reaction tank drain pipe 611, the solid-liquid separator 62 is communicated with the neutralization tank 63 through a solid-liquid separator drain pipe 623, the solid-liquid separator 62 discharges precipitates through a precipitate discharge pipe 621 arranged at the bottom end of the solid-liquid separator, the neutralization tank 63 is communicated with the filter tank 64 through a neutralization tank drain pipe 631, and the filter tank 64 is communicated with the water inlet end of the wastewater evaporation tank in the secondary wastewater filtration treatment system through a filter tank drain pipe 642. The reaction tank drain 611, the solid-liquid separator drain 623, the neutralization tank drain 631, and the filtration tank drain 642 are provided with a second transfer pump 65, respectively. The precipitate discharge pipe 621 is provided with a discharge pump 622.
A plurality of layers of filter screens 641 are horizontally arranged in the filter box 64, a neutralization box drain pipe 631 is communicated with and arranged at the top end of the filter box 64, and a filter box drain pipe 642 is communicated and arranged at the bottom end of the filter box 64, so that the wastewater can be filtered and then discharged.
The utility model discloses combine together steam concentration evaporation method and chemical precipitation method to adopt waste water multi-stage treatment's mode, realized the high-efficient treatment to desulfurization waste water, the utility model discloses the process of specifically handling desulfurization waste water as follows.
In desulphurization unit carried desulfurization waste water to waste water evaporating pot 1 of one-level sewage filtration treatment system, waste water evaporating pot 1 evaporated desulfurization waste water, has higher temperature because of the desulfurization waste water steam after the evaporation, so the utility model discloses in entering into steam heat transfer case 21 with the desulfurization waste water steam after the evaporation through steam outlet duct 11 for the cooling water that desulfurization waste water steam and heat exchange tube 22 let in carries out the heat transfer, realizes waste heat utilization.
The heat-exchanged desulfurization waste water steam enters the waste water evaporation tank 1 again through the circulating conveying pipe 31 to be evaporated again, and after a period of time, a valve on the exhaust pipeline 4 is opened to discharge the desulfurization waste water steam into a boiler flue gas conveying pipeline.
After a period of time, the desulfurized wastewater concentrated in the wastewater evaporation tank 1 is conveyed into the reaction tank 61 through the first conveying pump 13, lime milk and a flocculating agent are added into the reaction tank 61 to cause a precipitation reaction in the reaction tank 61, then the solution in the reaction tank 61 is pumped into the solid-liquid separator 62 to carry out solid-liquid separation, so that solid precipitates can be discharged, the liquid at the upper part is pumped into the neutralization tank 63, and acid liquor is added to carry out a neutralization reaction, so that the pH value of the solution is kept neutral. Then the solution is pumped to the filter tank 64 and filtered in the filter tank 64, the filtered solution is pumped to a wastewater evaporation tank of a secondary sewage filtration treatment system, the treatment process is carried out again, and finally the treated desulfurization wastewater can be discharged.
Claims (8)
1. Industrial boiler is sewage filtration treatment device for desulfurization which characterized in that: the device comprises a primary sewage filtering treatment system which is connected with a desulfurization device and is used for primary treatment of desulfurization wastewater, wherein the water outlet end of the primary sewage filtering treatment system is connected with a secondary sewage filtering treatment system which is used for secondary treatment of the desulfurization wastewater, and the structure of the secondary sewage filtering treatment system is the same as that of the primary sewage filtering treatment system;
the primary sewage filtering treatment system comprises a wastewater evaporating pot (1) which is connected with a desulfurization device and is used for evaporating and concentrating introduced desulfurization wastewater, a waste heat utilization system (2) which is used for utilizing waste heat in steam is communicated with the gas outlet end of the wastewater evaporating pot (1), and the gas outlet end of the waste heat utilization system (2) is communicated with a boiler flue gas conveying pipeline; the water outlet end of the wastewater evaporation tank (1) is sequentially communicated and provided with a reaction tank (61) for adding a medicament to enable the concentrated desulfurization wastewater to have a precipitation reaction, a solid-liquid separator (62) for performing solid-liquid separation on the concentrated desulfurization wastewater after the precipitation reaction, a neutralization tank (63) for adjusting the pH value of the desulfurization wastewater after the solid-liquid separation and a filter tank (64) for filtering the desulfurization wastewater after the pH value is adjusted, and the water outlet end of the filter tank (64) is connected to the water inlet end of the wastewater evaporation tank in the secondary wastewater filtration treatment system.
2. The filtration treatment apparatus for desulfurization wastewater of industrial boiler according to claim 1, characterized in that: the air outlet end of the waste water evaporating pot (1) is communicated with the communicated waste heat utilization system (2) through a steam air outlet pipe (11); the waste heat utilization system (2) comprises a steam heat exchange box (21), a heat supply network water inlet pipe (23) for introducing cooling water, a heat exchange pipe (22) communicated with the heat supply network water inlet pipe (23) and a heat supply network water outlet pipe (24) communicated with the other end of the heat exchange pipe (22), the heat supply network water inlet pipe (23) and the heat supply network water outlet pipe (24) are arranged outside the steam heat exchange box (21), and the heat exchange pipe (22) is arranged inside the steam heat exchange box (21); the steam heat exchange box (21) is communicated with a boiler flue gas conveying pipeline through an exhaust pipeline (4), and a valve is arranged on the exhaust pipeline (4).
3. The filtration treatment apparatus for desulfurization wastewater of industrial boiler according to claim 2, characterized in that: the heat exchange tube (22) is arranged in a great wall shape.
4. The filtration treatment apparatus for desulfurization wastewater of industrial boiler according to claim 2, characterized in that: a steam circulating system (3) for inputting the steam in the steam heat exchange box (21) into the waste water evaporating pot (1) again for evaporation is arranged between the steam heat exchange box (21) and the waste water evaporating pot (1).
5. The filtration treatment apparatus for wastewater for desulfurization of industrial boiler according to claim 4, characterized in that: the steam circulation system (3) comprises a circulation conveying pipe (31) which is communicated and arranged between the side wall of the steam heat exchange box and the top end of the side wall of the waste water evaporation tank, and a circulation conveying pump (32) is arranged on the circulation conveying pipe (31).
6. The filtration treatment apparatus for desulfurization wastewater of industrial boiler according to claim 1, characterized in that: the water outlet end of the waste water evaporation tank (1) is communicated with the reaction tank (61) through a waste water outlet pipe (12), and a first conveying pump (13) is arranged on the waste water outlet pipe (12).
7. The filtration treatment apparatus for desulfurization wastewater of industrial boiler according to claim 1, characterized in that: the reaction tank (61) is communicated with the solid-liquid separator (62) through a reaction tank liquid discharge pipe (611), the solid-liquid separator (62) is communicated with the neutralization tank (63) through a solid-liquid separator liquid discharge pipe (623), the solid-liquid separator (62) discharges precipitates through a precipitate discharge pipe (621) arranged at the bottom end of the solid-liquid separator, the neutralization tank (63) is communicated with the filter tank (64) through a neutralization tank liquid discharge pipe (631), and the filter tank (64) is communicated with the water inlet end of a wastewater evaporation tank in the secondary wastewater filtration treatment system through a filter tank liquid discharge pipe (642); a second delivery pump (65) is respectively arranged on the reaction tank drain pipe (611), the solid-liquid separator drain pipe (623), the neutralization tank drain pipe (631) and the filter tank drain pipe (642); a discharging pump (622) is arranged on the sediment discharging pipe (621).
8. The filtration treatment apparatus for wastewater for desulfurization of industrial boilers, according to claim 7, characterized in that: a plurality of layers of filter screens (641) are horizontally arranged in the filter box (64), a neutralizing box drain pipe (631) is communicated with the top end of the filter box (64), and a filter box drain pipe (642) is communicated with the bottom end of the filter box (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022727946.1U CN213771706U (en) | 2020-11-23 | 2020-11-23 | Sewage filtering treatment device for industrial boiler desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022727946.1U CN213771706U (en) | 2020-11-23 | 2020-11-23 | Sewage filtering treatment device for industrial boiler desulfurization |
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| CN213771706U true CN213771706U (en) | 2021-07-23 |
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| CN202022727946.1U Active CN213771706U (en) | 2020-11-23 | 2020-11-23 | Sewage filtering treatment device for industrial boiler desulfurization |
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