CN212283470U - Secondary steam purification system - Google Patents
Secondary steam purification system Download PDFInfo
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- CN212283470U CN212283470U CN202020688819.2U CN202020688819U CN212283470U CN 212283470 U CN212283470 U CN 212283470U CN 202020688819 U CN202020688819 U CN 202020688819U CN 212283470 U CN212283470 U CN 212283470U
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Abstract
The utility model discloses a secondary steam purification system, it includes sour clean system and alkali clean system: the removal rate of the acid purification system to the high-concentration volatile harmful substances through countercurrent pre-spraying absorption is 40% -50%, and the removal rate of the secondary steam through the alkali purification system to the high-concentration volatile harmful substances through countercurrent pre-spraying absorption and two-layer spraying absorption system can reach more than 99%. The secondary steam purification system effectively solves the problem of pollution or secondary pollution of the landfill leachate, not only meets the requirements of national energy conservation and environmental protection and sustainable development capability enhancement, but also is more beneficial to recovering and building good ecological environment.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, a secondary steam purification system is related to particularly.
Background
Along with the accelerated development of the urbanization process in China, the urban scale is enlarged day by day, the number of towns is increased constantly, and the yield of urban domestic garbage is increased day by day. According to incomplete statistics, the annual yield of domestic garbage in cities and towns of China currently exceeds 1.7X108The quantity of garbage percolate accounts for 27% of the total garbage output in the world, the garbage percolate problem is used as a byproduct of garbage, the quantity of garbage percolate is 7679 ten thousand tons in 2017, the quantity of garbage percolate is increased by 7-9% year by year, and the healthy development of the garbage treatment industry in China is seriously influenced.
Effectively solves the problem of pollution or secondary pollution of the landfill leachate, not only meets the national requirements of energy conservation and environmental protection and enhancement of sustainable development capability, but also is more beneficial to recovering and building good ecological environment.
The treatment of leachate from municipal landfill sites has been a very difficult problem in the design, operation and management of landfill sites. Leachate is the product of the gravity flow of liquids in landfills and is primarily derived from precipitation and the inherent moisture content of the refuse itself. The properties of the percolate vary over a considerable range, since many factors in the flow of the liquid may influence the properties of the percolate, including physical, chemical and biological factors. Generally, the pH value is between 4 and 9, the COD is in the range of 2000 to 62000mg/L, the BOD5 is from 60 to 45000mg/L, and the concentration of heavy metals is basically consistent with that of heavy metals in municipal sewage. The leachate of the municipal refuse landfill is high-concentration organic wastewater with complex components, and if the leachate is directly discharged into the environment without treatment, serious environmental pollution is caused. For the purpose of protecting the environment, it is essential to treat the leachate.
At present, the landfill leachate stock solution is mostly adopted to pass through membrane concentrated water firstly, fresh water is further treated for recycling, 30% of concentrated water after passing through the membrane is treated in an evaporation concentration mode, volatile organic matters in the evaporation process, part of harmful substances such as ammonia nitrogen and the like enter system distilled water along with secondary steam, distilled water is polluted, and stable operation of an evaporation system is influenced.
At present, the distilled water is discharged after reaching standards by adopting a mode that secondary steam is condensed and then enters a biochemical system, passes through an RO (reverse osmosis) membrane, an ion exchange membrane system, passes through a DTRO (draw texturing yarn) membrane and the like, and the fact that the biochemical system stays for reaching the standards actually longer and occupies a large area is found in the actual operation process; the RO membrane has high operation pressure, the water quality requirement in the use process is high, and the membrane group needs to be cleaned and replaced regularly; the centrifugal exchange membrane needs to be regenerated periodically, and the regenerated liquid generates new waste water; the water yield of the DTRO membrane fluctuates greatly along with the water quality, and the DTRO membrane is sensitive to the temperature and difficult to meet the requirements of stability, water quality fluctuation resistance and continuous operation.
Disclosure of Invention
The utility model mainly aims at providing a solution that one set of application scope is wide, easy operation, maintenance cycle length, insensitive and the running cost is low to ambient temperature.
In order to achieve the above object, the present invention provides the following technical solutions: a secondary steam purification system includes an acid purification system and an alkali purification system.
The acid purification system comprises: sour spraying system in advance, sour clean system, sour spraying cycle system, magma system of arranging outward, sour absorption liquid heating system, acidizing fluid replenishment system, its characterized in that: the acid pre-spraying system and the acid purification system are connected in series, the acid pre-spraying system and the acid purification system provide acid absorption liquid through an acid spraying circulation system, the crystal slurry discharge system is arranged at the bottom of the acid purification system, the acid absorption liquid heating system is arranged in the middle of the acid purification system, and an outlet of the acid liquid supplementing system enters the acid absorption liquid heating system.
The alkali purification system comprises: alkali spraying system in advance, alkali clean system, alkali spray cycle system, magma system of arranging outward, alkali absorption liquid heating system, alkali lye additional system, its characterized in that: the alkali pre-spraying system and the alkali purification system are connected in series, the alkali pre-spraying system and the alkali purification system provide alkali absorption liquid through an alkali spraying circulation system, the crystal slurry discharge system is arranged at the bottom of the alkali purification system, the alkali absorption liquid heating system is arranged in the middle of the alkali purification system, and an outlet of the alkali liquid supplement system enters the alkali absorption liquid heating system.
The acid pre-spraying system is internally provided with an upper layer spraying system and a lower layer spraying system, the spraying direction of the upper layer spraying system and the lower layer spraying system is against the flow direction of secondary steam, and the inlet of the acid pre-spraying system is provided with a temperature sensor.
The upper part of the acid purification system is provided with a demister, the middle part of the acid purification system is provided with two layers of spraying systems, the spraying directions of the spraying systems are against the flow direction of secondary steam, the lower part of the acid purification system is provided with a crystal slurry collection cone, the lower part of the crystal slurry collection cone is connected with a guide cylinder, and the lower part of the acid purification system is provided with a liquid level sensor and a densimeter.
The acid spraying circulation system is composed of an acid spraying circulation pump, an acid pre-spraying system and an acid purification system, wherein the inlet of the acid spraying circulation pump is connected with the middle pipeline of the acid purification system, and the outlet of the acid spraying circulation pump is respectively connected with the acid pre-spraying system and the acid spraying absorption system of the acid purification tower.
Further, the acid absorption liquid heating system consists of an acid heater and an acid heating circulating pump, and the inlet of the acid heating circulating pump is connected with the middle part of the acid purification system.
Further, the acid liquor supplementing system consists of an acid delivery pump and an acid storage tank, and the start and stop of the acid delivery pump are controlled by a liquid level sensor of the acid purification tower.
Furthermore, an upper layer spraying system and a lower layer spraying system are arranged in the alkali pre-spraying system, and the spraying direction of the upper layer spraying system and the lower layer spraying system is against the flow direction of secondary steam.
The upper portion of the alkali purification system is provided with a demister, an upper outlet pipeline is provided with a temperature sensor and an on-line monitor, the middle portion of the alkali purification system is provided with two layers of spraying systems, the spraying directions of the spraying systems are against the flow direction of secondary steam, the lower portion of the alkali purification system is provided with crystal slurry collecting cones, the lower portions of the crystal slurry collecting cones are connected with a guide cylinder, and the lower portion of the alkali purification system is provided with a liquid level sensor and a liquid level sensor.
The alkali spraying circulation system is composed of an alkali spraying circulation pump, an alkali pre-spraying system and an alkali purification system, wherein the inlet of the alkali spraying circulation pump is connected with the middle pipeline of the alkali purification system, and the outlet of the alkali spraying circulation pump is respectively connected with the alkali spraying absorption system of the alkali pre-spraying system and the alkali purification tower.
Furthermore, the alkali absorption liquid heating system consists of an alkali heater and an alkali heating circulating pump, and the inlet of the alkali heating circulating pump is connected with the middle part of the alkali purification system.
Drawings
The following describes the present invention in further detail with reference to fig. 1.
FIG. 1 is a schematic diagram of a secondary vapor purification system;
the figure in the figure shows a secondary steam purification system; 1 crystal slurry conveying pump, 2 acid spraying circulating pump, 3 acid pre-spraying system, 31 upper spraying, 32 lower spraying, 4 acid purifying tower, 41 demister, 42 acid spraying absorption system, 43 collecting cone, 44 guide cylinder, 5 acid heater, 6 acid heating circulating pump, 7 acid replenishing pump, 8 acid storage tank, 9 crystal slurry conveying pump, 10 alkali spraying circulating pump, 11 alkali pre-spraying system, 111 upper spraying, 112 lower spraying, 12 organic purifying tower, 121 demister, 122 alkali spraying absorption system, 123 collecting cone, 124 guide cylinder, 13 alkali heater, 14 alkali heating circulating pump, 15 alkali replenishing pump, 16 alkali storage tank, 17 densimeter, 18, 19 on-line monitor, 20 liquid level sensor, 21 densimeter, 21 on-line monitor, 22 thermometer and 24 liquid level sensor.
Detailed Description
The following describes a preferred embodiment of a secondary steam purification system according to the present invention in detail with reference to the accompanying drawings.
To achieve the above object, referring to fig. 1, the present invention provides the following technical solutions: a secondary steam purification system includes an acid purification system and an alkali purification system.
The acid purification system comprises: acid spraying system 3 in advance, sour clean system 4, acid spray circulation system 2, magma external discharge system 1, sour absorption liquid heating system 5, acidizing fluid make-up system 7, its characterized in that: the acid pre-spraying system 3 and the acid purification system 4 are connected in series, the acid pre-spraying system 3 and the acid purification system 4 provide acid absorption liquid through an acid spraying circulation system 2, the crystal slurry discharge system 1 is arranged at the bottom of the acid purification system, the acid absorption liquid heating system 5 is arranged in the middle of the acid purification system, and an outlet of the acid liquid supplementing system 7 enters the acid absorption liquid heating system 5.
The alkali purification system comprises: the system comprises an alkali pre-spraying system 11, an alkali purification system 12, an alkali spraying circulation system 10, a crystal slurry discharge system 9, an alkali absorption liquid heating system 13 and an alkali liquor supplementing system 15, and is characterized in that: the alkali pre-spraying system 11 and the alkali purification system 12 are connected in series, the alkali pre-spraying system 11 and the alkali purification system 12 provide alkali absorption liquid through an alkali spraying circulation system 10, the crystal slurry discharge system 9 is arranged at the bottom of the alkali purification system, the alkali absorption liquid heating system 13 is arranged in the middle of the alkali purification system, and an outlet of the alkali liquid supplement system 15 enters the alkali absorption liquid heating system 13.
Adopt the above-mentioned scheme, compare in prior art, the utility model discloses the flow is simple, it can reach more than 99% to combine two-layer spraying absorption system clearance to high concentration volatility harmful substance through the adverse current pre-spray absorption, absorption liquid after heating to the temperature loss through spraying system can be replenished, the acidic absorption liquid that secondary steam after the purification eliminated in the secondary steam through defroster 41 avoids the corruption to the later process pipeline material, the system is to the harmful gas that can not handle with acidic absorption liquid, through secondary alkali clean system, high concentration volatility harmful substance can reach more than 99% through the two-layer spraying absorption clearance of adverse current pre-spray absorption combination, can be replenished to the temperature loss through spraying system, the temperature influences the absorption rate of absorption liquid greatly, carry out interlocking control through on-line between the temperature of harmful gas monitoring and absorption liquid and the flow that sprays, the condensed water of the purified secondary steam can basically meet the requirement of discharge and reuse, and the supplemented temperature does not influence the heat balance entering the next system.
An upper-layer spraying system 31 and a lower-layer spraying system 32 are arranged in the acid pre-spraying system 3, the spraying direction of the upper-layer spraying system 31 and the spraying direction of the lower-layer spraying system 32 are against the flow direction of secondary steam, and a temperature sensor 18 is arranged at the inlet of the acid pre-spraying system.
By adopting the scheme, the absorption removal rate of high-concentration volatile harmful substances is 40-50% through countercurrent pre-spraying, the spraying amount can be saved by 30% compared with the absorption rate reaching the same with the concurrent contact at the moment of countercurrent contact, the power cost is directly reduced, the preparation is made for absorption spraying, other impurities carried by secondary steam can be removed, and the steam inlet temperature record is compared with the subsequent heating temperature control on line.
The upper part of the acid purification system is provided with a demister 41, the middle part of the acid purification system is provided with two layers of spraying systems 41, the spraying directions of the spraying systems are against the flow direction of secondary steam, the lower part of the acid purification system 4 is provided with a crystal slurry collection cone 43, the lower part of the crystal slurry collection cone 43 is connected with a guide cylinder 44, and the lower part of the acid purification system is provided with a liquid level sensor 20 and a densimeter 17.
By adopting the scheme, the pre-absorbed secondary steam is further purified, the purification rate reaches 99%, the purified secondary steam is subjected to demister 41 to eliminate acidic absorption liquid in the secondary steam to avoid corrosion to subsequent process pipeline materials, the absorption liquid can slowly reach saturation through continuous circulating concentration, crystals are continuously precipitated to a crystal slurry collecting cone 43 due to gravity and enter a guide cylinder 44 to fall to the bottom, whether the absorption liquid is monitored on line through a densimeter 17 and the preset concentration is reached to control the start and stop of a crystal slurry conveying pump 1, and the liquid level sensor 20 controls the start and stop of an acid liquid supplementing system 7.
The acid spraying circulation system is composed of an acid spraying circulation pump 2, an acid pre-spraying system 3 and an acid purification system 42, the inlet of the spraying circulation pump 2 is connected with the middle pipeline of the acid purification system, and the outlet of the acid purification system is respectively connected with the acid pre-spraying system 3 and the acid spraying absorption system 42 of the acid purification tower 4.
By adopting the scheme, the spraying circulating pump 2 takes the absorption liquid without crystal slurry, so that the risk of crystal slurry crystallization and blockage in the pipeline is avoided.
Further, the acid absorption liquid heating system is composed of an acid heater 5 and an acid heating circulating pump 6, and an inlet of the acid heating circulating pump is connected with the middle part of the acid purification system.
Further, the acid liquor supplementing system is composed of an acid delivery pump 7 and an acid storage tank 8, and the start and stop of the acid delivery pump 7 are controlled by a liquid level sensor 20 of the acid purification tower 4.
Further, an upper layer spraying system 111 and a lower layer spraying system 112 are arranged inside the alkali pre-spraying system, and the spraying directions of the upper layer spraying system 111 and the lower layer spraying system 112 are opposite to the flow direction of secondary steam.
The upper portion of alkali clean system 12 is provided with defroster 121, is provided with temperature sensor 23 and on-line monitoring appearance 23 on the export pipeline of upper portion, alkali clean system middle part is provided with two-layer spraying system 122, spraying system sprays the direction and is followed the steam flow direction against, alkali clean system lower part is provided with magma and collects centrum 123, magma collect centrum 123 sub-unit connection draft tube 124, alkali clean system lower part is provided with level sensor 24 and densimeter 21.
The alkali spraying circulation system is composed of an alkali spraying circulation pump 10, an alkali pre-spraying system 11 and an alkali purification system 12, wherein the inlet of the alkali spraying circulation pump 10 is connected with a middle pipeline of the alkali purification system, and the outlet of the alkali spraying circulation pump 10 is respectively connected with the alkali pre-spraying system 11 and an alkali spraying absorption system 122 of the alkali purification tower 12.
Further, the alkali absorption liquid heating system is composed of an alkali heater 13 and an alkali heating circulating pump 14, and an inlet of the alkali heating circulating pump is connected with the middle part of the alkali purification system.
The working principle of the invention is as follows: the secondary steam passes through a pipeline, a thermometer 18 is arranged on the pipeline, the steam firstly enters an acid pre-spraying system 3, 40-50% of toxic and harmful substances are removed through secondary countercurrent contact absorption, then enters an acid purification tower 4, 99% of the harmful substances are removed through a two-layer acid spraying absorption system 42, absorption liquid crystal slurry absorbing the harmful substances is guided to the bottom of the acid absorption tower 4 through a collection cone 43 and a guide cylinder 44, unsaturated absorption liquid flows to the middle of the acid absorption tower 4 downstream and is conveyed to the spraying system through an acid spraying circulating pump 2 for recirculation, a density meter 17 at the bottom of the acid absorption tower 4 monitors the saturation degree of the absorption liquid, a liquid level meter 20 monitors the liquid level of the absorption liquid of the acid purification tower 4 to control the start and stop of an acid supplementing pump 7, a 6-acid heater preheats the supplemented acid to supplement the absorption liquid and the heat loss of the system, the evolved steam enters an alkali purification system after being separated by a demister 41 at the upper, an online detector 19 is arranged on a pipeline to perform online monitoring on the evolution effect, the flow of an acid spraying circulating pump 2 and an acid supplementing pump 7 is controlled and adjusted, steam after primary purification firstly enters an alkali pre-spraying system 11 to remove 40-50% of volatile organic matters through secondary countercurrent contact absorption, then enters an alkali purification tower 12 to remove 99% of volatile organic matters through a two-layer alkali spraying absorption system 122, absorption liquid sediment is guided to the bottom of the alkali absorption tower 12 through a collection cone 123 and a guide cylinder 124, unsaturated absorption liquid flows to the middle of the alkali absorption tower 12 downstream and is conveyed to the spraying system for recirculation through an alkali spraying circulating pump 20, a densimeter 21 at the bottom of the alkali absorption tower 12 monitors the saturation degree of the absorption liquid, a liquid level meter 24 monitors the liquid level of the absorption liquid of the alkali purification tower 12 to control the start and stop of an alkali supplementing pump 15, and an alkali heater 13 preheats the supplemented alkali to supplement the absorption liquid and the heat loss of the system, the steam after evolution enters the process route after being separated by the demister 121 on the upper part of the alkali absorption tower 12, an online detector 22 is arranged on the pipeline to perform online monitoring on the evolution effect, the flow of the alkali spraying circulating pump 10 and the flow of the alkali supplementing pump 15 are controlled and adjusted, the purified secondary steam can be connected into the MVR evaporation system and continuously recycled, and the condensate of the secondary steam can meet the requirements of emission and reuse.
The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these all fall into the protection scope of the present invention.
Claims (10)
1. A secondary steam purification system includes an acid purification system and an alkali purification system.
The acid purification system comprises: sour spraying system in advance, sour clean system, sour spraying cycle system, magma system of arranging outward, sour absorption liquid heating system, acidizing fluid replenishment system, its characterized in that: the acid pre-spraying system and the acid purification system are connected in series, the acid pre-spraying system and the acid purification system provide acid absorption liquid through an acid spraying circulation system, the crystal slurry discharge system is arranged at the bottom of the acid purification system, the acid absorption liquid heating system is arranged in the middle of the acid purification system, and an outlet of the acid liquid supplementing system enters the acid absorption liquid heating system;
the alkali purification system comprises: alkali spraying system in advance, alkali clean system, alkali spray cycle system, magma system of arranging outward, alkali absorption liquid heating system, alkali lye additional system, its characterized in that: the alkali pre-spraying system and the alkali purification system are connected in series, the alkali pre-spraying system and the alkali purification system provide alkali absorption liquid through an alkali spraying circulation system, the crystal slurry discharge system is arranged at the bottom of the alkali purification system, the alkali absorption liquid heating system is arranged in the middle of the alkali purification system, and an outlet of the alkali liquid supplement system enters the alkali absorption liquid heating system.
2. A secondary vapor purification system according to claim 1, wherein: the acid pre-spraying system is internally provided with an upper layer spraying system and a lower layer spraying system, the spraying direction of the upper layer spraying system and the lower layer spraying system is against the flow direction of secondary steam, and the inlet of the acid pre-spraying system is provided with a temperature sensor.
3. A secondary vapor purification system according to claim 1, wherein: the upper part of the acid purification system is provided with a demister, the middle part of the acid purification system is provided with two layers of spraying systems, the spraying directions of the spraying systems are against the flow direction of secondary steam, the lower part of the acid purification system is provided with a crystal slurry collection cone, the lower part of the crystal slurry collection cone is connected with a guide cylinder, and the lower part of the acid purification system is provided with a liquid level sensor and a densimeter.
4. A secondary vapor purification system according to claim 1, wherein: the acid spraying circulation system is composed of an acid spraying circulation pump, an acid pre-spraying system and an acid purification system, wherein the inlet of the acid spraying circulation pump is connected with the middle pipeline of the acid purification system, and the outlet of the acid spraying circulation pump is respectively connected with the acid pre-spraying system and the acid spraying absorption system of the acid purification tower.
5. A secondary vapor purification system according to claim 1, wherein: the acid absorption liquid heating system consists of an acid heater and an acid heating circulating pump, and the inlet of the acid heating circulating pump is connected with the middle part of the acid purification system.
6. A secondary vapor purification system according to claim 1, wherein: the acid liquor supplementing system consists of an acid delivery pump and an acid storage tank, and the start and stop of the acid delivery pump are controlled by a liquid level sensor of the acid purification tower.
7. A secondary vapor purification system according to claim 1, wherein: the alkali pre-spraying system is internally provided with an upper layer spraying system and a lower layer spraying system, and the spraying direction of the upper layer spraying system and the lower layer spraying system is against the flow direction of secondary steam.
8. A secondary vapor purification system according to claim 1, wherein: the upper portion of the alkali purification system is provided with a demister, an upper outlet pipeline is provided with a temperature sensor and an on-line monitor, the middle portion of the alkali purification system is provided with two layers of spraying systems, the spraying directions of the spraying systems are against the flow direction of secondary steam, the lower portion of the alkali purification system is provided with crystal slurry collecting cones, the lower portions of the crystal slurry collecting cones are connected with a guide cylinder, and the lower portion of the alkali purification system is provided with a liquid level sensor and a liquid level sensor.
9. A secondary vapor purification system according to claim 1, wherein: the alkali spraying circulation system is composed of an alkali spraying circulation pump, an alkali pre-spraying system and an alkali purification system, wherein the inlet of the alkali spraying circulation pump is connected with the middle pipeline of the alkali purification system, and the outlet of the alkali spraying circulation pump is respectively connected with the alkali spraying absorption system of the alkali pre-spraying system and the alkali purification tower.
10. A secondary vapor purification system according to claim 1, wherein: the alkali absorption liquid heating system consists of an alkali heater and an alkali heating circulating pump, and the inlet of the alkali heating circulating pump is connected with the middle part of the alkali purification system.
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| CN202020688819.2U CN212283470U (en) | 2020-04-29 | 2020-04-29 | Secondary steam purification system |
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| CN202020688819.2U CN212283470U (en) | 2020-04-29 | 2020-04-29 | Secondary steam purification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082290A (en) * | 2021-11-04 | 2022-02-25 | 中创水务科技环保(广东)有限公司 | Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process |
| CN117088444A (en) * | 2023-08-28 | 2023-11-21 | 武汉天源环保股份有限公司 | High ammonia nitrogen organic wastewater treatment system and method |
-
2020
- 2020-04-29 CN CN202020688819.2U patent/CN212283470U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082290A (en) * | 2021-11-04 | 2022-02-25 | 中创水务科技环保(广东)有限公司 | Method for advanced treatment of secondary steam COD in landfill leachate by MVR evaporation process |
| CN117088444A (en) * | 2023-08-28 | 2023-11-21 | 武汉天源环保股份有限公司 | High ammonia nitrogen organic wastewater treatment system and method |
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