CN113426253A - Demister washing water cascade utilization system - Google Patents
Demister washing water cascade utilization system Download PDFInfo
- Publication number
- CN113426253A CN113426253A CN202110874136.5A CN202110874136A CN113426253A CN 113426253 A CN113426253 A CN 113426253A CN 202110874136 A CN202110874136 A CN 202110874136A CN 113426253 A CN113426253 A CN 113426253A
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- Prior art keywords
- demister
- water
- pipe
- stage
- washing water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 213
- 238000005406 washing Methods 0.000 title claims abstract description 53
- 238000011010 flushing procedure Methods 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims description 17
- 238000004064 recycling Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 description 11
- 230000023556 desulfurization Effects 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a demister washing water cascade utilization system which comprises a demister washing water tank, a demister washing water pump, a reuse water tank, a stirrer, a reuse water pump, a confluence groove and a drain pipe, wherein the demister washing water tank is arranged in the demister washing water tank; an inlet of the demister flushing water pump is communicated with an outlet of the demister flushing water tank, and an outlet of the demister flushing water pump is communicated with a second-stage demister lower flushing water pipe, a second-stage demister upper flushing water pipe, a third-stage demister lower flushing water pipe and a third-stage demister upper flushing water pipe; a confluence groove is arranged at the bottom of the lower end of the second-stage demister, and the bottom outlet of the confluence groove is communicated with a reuse water tank through a drain pipe; the inlet of the reuse water pump is communicated with the outlet of the reuse water tank, the outlet of the reuse water pump is communicated with the lower flushing water pipe of the first-stage demister and the upper flushing water pipe of the first-stage demister, and the system can realize the cascade utilization of the flushing water of the demister in the absorption tower and reduce the water consumption.
Description
Technical Field
The invention belongs to the technical field of water saving, and relates to a flushing water cascade utilization system of a demister.
Background
At present, the high-efficiency ridge demister installed at the outlet position at the top of the desulfurization absorption tower is generally adopted to realize the purpose of separating flue gas and liquid drops (liquid drops containing slurry) after wet desulfurization of industrial flue gas, the ridge demister adopts the inertia interception principle, the gas-liquid separation efficiency is high, and the ultralow emission requirement of the industrial flue gas can be met. But along with the increase of environmental protection equipment, system's water balance is difficult to maintain, can't satisfy the defroster and wash required a large amount of sparge water, causes the defroster often to block up, seriously influences unit operation safety. Taking coal fired power plant as an example, the ultralow emission of wet flue gas desulfurization system is reformed transform and has generally increased defroster progression and commentaries on classics quick-witted equipment, and defroster sparge water, equipment cooling water consumption increase, and desulfurization system entry flue gas temperature because the operation of low-temperature economizer, generally reduce the range between 30 ~ 50 ℃ for desulfurization system evaporation water consumption reduces by a wide margin. The water quantity entering the desulfurization system is increased, the water consumption of the desulfurization system is reduced, and the water balance is difficult to ensure. Therefore, it is necessary to develop a technology for recovering washing water of a demister in a cascade manner, so as to reduce water consumption, and the technology is an important measure for saving water and maintaining water balance of a desulfurization system.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a demister washing water cascade utilization system, which can realize cascade utilization of demister washing water in an absorption tower and reduce water consumption.
In order to achieve the aim, the demister washing water cascade utilization system comprises a demister washing water tank, a demister washing water pump, a reuse water tank, a stirrer, a reuse water pump, a confluence groove and a drain pipe;
an inlet of the demister flushing water pump is communicated with an outlet of the demister flushing water tank, and an outlet of the demister flushing water pump is communicated with a second-stage demister lower flushing water pipe, a second-stage demister upper flushing water pipe, a third-stage demister lower flushing water pipe and a third-stage demister upper flushing water pipe;
a confluence groove is arranged at the bottom of the lower end of the second-stage demister, and the bottom outlet of the confluence groove is communicated with a reuse water tank through a drain pipe;
the inlet of the reuse water pump is communicated with the outlet of the reuse water tank, and the outlet of the reuse water pump is communicated with the lower flushing water pipe of the first-stage demister and the upper flushing water pipe of the first-stage demister.
The export of defroster sparge water pump is linked together through the washing water pipe on the female pipe of defroster sparge water and second level defroster, washing water pipe on the second level defroster, washing water pipe and the washing water pipe on the third level defroster under the third level defroster.
The water supply system also comprises a water source, a first water replenishing valve and a control system; the outlet of the water source is communicated with a water replenishing port of the demister flushing water tank through a first water replenishing valve, a first liquid level meter is arranged in the demister flushing water tank, and the first liquid level meter and the first water replenishing valve are connected with a control system.
The outlet of the reuse water pump is communicated with the lower flushing water pipe of the first-stage demister and the upper flushing water pipe of the first-stage demister through a reuse water main pipe.
A stirrer is arranged in the recycling water tank.
A second liquid level meter is arranged in the recycling water tank, and the second liquid level meter and the recycling water pump are communicated with the control system.
The inlet of the reuse water pump is communicated with the outlet of the reuse water tank through a filter.
The second-stage demister is of an inverted ridge structure.
The second stage demister is a ridge structure.
The invention has the following beneficial effects:
when the demister washing water cascade utilization system is in specific operation, most of washing water of the second-stage demister and the third-stage demister is collected into the reuse tank through the confluence groove and the drain pipe, and the first-stage demister is washed by reuse water in the reuse tank, so that the demister washing water is utilized in a grading and cascade mode, and water consumption of a desulfurization system is remarkably reduced. In addition, the invention realizes the recovery and the gradient utilization of the washing water of the demister, thereby increasing the washing frequency and the washing time of the demister, enabling the demister and the washing water recovery system to be in a wet and water flowing state and not easy to block.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a schematic structural diagram according to a first embodiment;
fig. 3 is a schematic structural diagram of the second embodiment.
Wherein, 1 is defroster wash water tank, 2 is defroster wash water pump, 3 is the female pipe of defroster sparge water, 4 is the retrieval and utilization water tank, 5 is the agitator, 6 is the filter, 7 is the retrieval and utilization water pump, 8 is the female pipe of reuse water, 9 is the groove of converging, 10 is the drain pipe, 11 is a defroster supporting beam, 12 is the first order defroster, 13 is the second order defroster, 14 is the third order defroster, 15 is wash water pipe under the first order defroster, 16 is wash water pipe on the first order defroster, 17 is wash water pipe under the second order defroster, 18 is wash water pipe on the second order defroster, 19 is wash water pipe under the third order defroster, 20 is wash water pipe on the third order defroster.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the demister washing water cascade utilization system according to the present invention includes a demister washing water tank 1, a demister washing water pump 2, a demister washing water header 3, a reuse water tank 4, a stirrer 5, a filter 6, a reuse water pump 7, a reuse water header 8, a confluence tank 9, and a drain pipe 10;
the entry of defroster wash water pump 2 is linked together with the export of defroster wash water tank 1, the export of defroster wash water pump 2 is through the female pipe 3 of defroster sparge water and the second level defroster wash water pipe 17 down, wash water pipe 18 on the second level defroster, wash water pipe 19 and the third level defroster on wash water pipe 20 are linked together down to the third level defroster, wash second level defroster 13 through the nozzle on wash water pipe 17 and the second level defroster wash water pipe 18 down to the second level defroster, wash third level defroster 14 through the nozzle on wash water pipe 19 and the third level defroster wash water pipe 20 down.
The outlet of the water source is communicated with a water replenishing port of the demister flushing water tank 1 through a first water replenishing valve, a first liquid level meter is arranged in the demister flushing water tank 1, the first liquid level meter and the first water replenishing valve are connected with a control system, and process water is replenished according to the liquid level of the demister flushing water tank 1.
The bottom of 13 lower extremes of second level defroster is provided with converges groove 9, and the bottom export that converges groove 9 is linked together through drain pipe 10 and retrieval and utilization water tank 4, collects the sparge water that flows down in second level defroster 13 and the third level defroster 14 through converging groove 9, and wherein, drain pipe 10 inserts below retrieval and utilization water tank 4 liquid level, through the water seal principle, avoids the flue gas to reveal.
The entry of retrieval and utilization water pump 7 is linked together through the export of filter 6 with retrieval and utilization water tank 4, and the export of retrieval and utilization water pump 7 is linked together through female pipe 8 of reuse water and wash water pipe 15 under the first order defroster and wash water pipe 16 on the first order defroster, washes first order defroster 12 through the wash water pipe 15 under the first order defroster and wash water pipe 16 upper nozzle spun water washing on the first order defroster.
A stirrer 5 is arranged in the reuse water tank 4 to prevent solid particles in the reuse water from depositing; a second liquid level meter is arranged in the recycling water tank 4, the recycling water pump 7 is communicated with the control system, the water inlet and the water outlet of the recycling water tank 4 are balanced by adjusting the flushing frequency of the demister, and the balance is properly adjusted by supplementing process water.
The invention is mainly characterized in that:
utilize the characteristics that the slope of ridge formula (or the formula of falling the ridge) defroster was arranged, through converging groove 9 and drain pipe 10, collect the most sparge water of second level defroster 13 and third level defroster 14 to retrieval and utilization water tank 4, wash first level defroster 12 through the reuse water in retrieval and utilization water tank 4, realize the hierarchical step utilization of defroster sparge water, show the water consumption that reduces desulfurization system.
According to the invention, the drain pipe 10 is inserted below the liquid level of the reuse water tank 4, and through a water seal principle, flue gas leakage is avoided while washing water of the demister is recovered.
The invention realizes the recycling and gradient utilization of the washing water of the demister, thereby increasing the washing frequency and the washing time of the demister, and ensuring that the demister and the washing water recycling system are in a wet and water flowing state and are not easy to block.
Example one
Referring to fig. 2, the second-stage demister 13 is an inverted ridge type, and the second-stage demister 13 and the third-stage demister 14 are fixed on the inner wall of the tower body of the desulfurization absorption tower through demister supporting beams 11; a collecting tank 9 is provided at a lower portion of the second demister 13 at the lowest portion of the inverted ridge to collect wash water flowing down from the second-stage demister 13 and the third-stage demister 14.
Example two
Referring to fig. 3, the second-stage demister 13 is of a ridge type, and is provided with the demister support beam 11 alone; the bottom of the ridge of the second-stage demister 13 is provided with a converging tank 9 on the side surface or the bottom surface of the demister supporting beam 11 to collect wash water flowing down from the second-stage demister 13 and the third-stage demister 14.
Claims (9)
1. A demister washing water cascade utilization system is characterized by comprising a demister washing water tank (1), a demister washing water pump (2), a reuse water tank (4), a stirrer (5), a reuse water pump (7), a confluence groove (9) and a drain pipe (10);
an inlet of the demister flushing water pump (2) is communicated with an outlet of the demister flushing water tank (1), and an outlet of the demister flushing water pump (2) is communicated with a second-stage demister lower flushing water pipe (17), a second-stage demister upper flushing water pipe (18), a third-stage demister lower flushing water pipe (19) and a third-stage demister upper flushing water pipe (20);
a confluence groove (9) is arranged at the bottom of the lower end of the second-stage demister (13), and the bottom outlet of the confluence groove (9) is communicated with the reuse water tank (4) through a drain pipe (10);
the inlet of the recycling water pump (7) is communicated with the outlet of the recycling water tank (4), and the outlet of the recycling water pump (7) is communicated with the lower flushing water pipe (15) of the first-stage demister and the upper flushing water pipe (16) of the first-stage demister.
2. The demister washing water cascade utilization system according to claim 1, wherein an outlet of the demister washing water pump (2) is communicated with the second-stage demister lower washing water pipe (17), the second-stage demister upper washing water pipe (18), the third-stage demister lower washing water pipe (19) and the third-stage demister upper washing water pipe (20) through a demister washing water header pipe (3).
3. The demister washing water cascade utilization system of claim 1, further comprising a water source, a first water replenishing valve and a control system; the outlet of the water source is communicated with a water replenishing port of the demister flushing water tank (1) through a first water replenishing valve, a first liquid level meter is arranged in the demister flushing water tank (1), and the first liquid level meter and the first water replenishing valve are connected with a control system.
4. The demister washing water cascade utilization system according to claim 1, wherein an outlet of the reuse water pump (7) is communicated with a first-stage demister lower washing water pipe (15) and a first-stage demister upper washing water pipe (16) through a reuse water header pipe (8).
5. Demister washing water cascade utilization system according to claim 1, characterized in that an agitator (5) is provided in the reuse water tank (4).
6. The demister washing water cascade utilization system according to claim 3, wherein a second liquid level meter is arranged in the reuse water tank (4), and the second liquid level meter and the reuse water pump (7) are communicated with the control system.
7. Demister washing water cascade utilization system according to claim 1, characterized in that the inlet of the reuse water pump (7) is in communication with the outlet of the reuse water tank (4) via a filter (6).
8. A demister washing water cascade utilization system as set forth in claim 1, characterized in that the second stage demister (13) is an inverted ridge structure.
9. A demister washing water cascade utilization system according to claim 1, characterized in that the second stage demister (13) is a ridge structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110874136.5A CN113426253A (en) | 2021-07-30 | 2021-07-30 | Demister washing water cascade utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110874136.5A CN113426253A (en) | 2021-07-30 | 2021-07-30 | Demister washing water cascade utilization system |
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| Publication Number | Publication Date |
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| CN113426253A true CN113426253A (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110874136.5A Pending CN113426253A (en) | 2021-07-30 | 2021-07-30 | Demister washing water cascade utilization system |
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| CN (1) | CN113426253A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113413733A (en) * | 2021-07-30 | 2021-09-21 | 西安西热锅炉环保工程有限公司 | Flue gas sprays cooling and receives water system |
| CN114247242A (en) * | 2021-12-26 | 2022-03-29 | 温州宏刚科技有限公司 | Directional movable vortex type mist catching device for chemical desulphurization and implementation method |
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| US20110100594A1 (en) * | 2009-05-06 | 2011-05-05 | Api Heat Transfer Inc. | Water separator and system |
| CN206366283U (en) * | 2016-12-30 | 2017-08-01 | 山西易通环保技术有限公司 | A kind of demister for desulphurization denitration absorption tower |
| CN107803111A (en) * | 2017-12-07 | 2018-03-16 | 北京兴晟科技有限公司 | A kind of desulfuration absorbing tower mist eliminator flushing water system for recycling |
| CN108499335A (en) * | 2018-06-08 | 2018-09-07 | 大唐环境产业集团股份有限公司 | A kind of string tower desulphurization system for rinsing demister using recycling filtrate water |
| CN215388593U (en) * | 2021-07-30 | 2022-01-04 | 西安西热锅炉环保工程有限公司 | Desulfurization absorption tower defroster sparge water cascade utilizes device |
-
2021
- 2021-07-30 CN CN202110874136.5A patent/CN113426253A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110100594A1 (en) * | 2009-05-06 | 2011-05-05 | Api Heat Transfer Inc. | Water separator and system |
| CN206366283U (en) * | 2016-12-30 | 2017-08-01 | 山西易通环保技术有限公司 | A kind of demister for desulphurization denitration absorption tower |
| CN107803111A (en) * | 2017-12-07 | 2018-03-16 | 北京兴晟科技有限公司 | A kind of desulfuration absorbing tower mist eliminator flushing water system for recycling |
| CN108499335A (en) * | 2018-06-08 | 2018-09-07 | 大唐环境产业集团股份有限公司 | A kind of string tower desulphurization system for rinsing demister using recycling filtrate water |
| CN215388593U (en) * | 2021-07-30 | 2022-01-04 | 西安西热锅炉环保工程有限公司 | Desulfurization absorption tower defroster sparge water cascade utilizes device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113413733A (en) * | 2021-07-30 | 2021-09-21 | 西安西热锅炉环保工程有限公司 | Flue gas sprays cooling and receives water system |
| CN114247242A (en) * | 2021-12-26 | 2022-03-29 | 温州宏刚科技有限公司 | Directional movable vortex type mist catching device for chemical desulphurization and implementation method |
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