CN112222118A - Absorption tower oxidation air pipe flushing and purging system and working method - Google Patents
Absorption tower oxidation air pipe flushing and purging system and working method Download PDFInfo
- Publication number
- CN112222118A CN112222118A CN202011290956.1A CN202011290956A CN112222118A CN 112222118 A CN112222118 A CN 112222118A CN 202011290956 A CN202011290956 A CN 202011290956A CN 112222118 A CN112222118 A CN 112222118A
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- Prior art keywords
- pipe
- oxidation air
- washing
- oxidation
- absorption tower
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
Abstract
The invention discloses a washing and purging system and a working method for an oxidation air pipe of an absorption tower. In addition, the system can be used for washing when the unit is shut down, and can also be used for washing when the unit is operated, so that the unit is prevented from being shut down and overhauled due to blockage of the oxidation air pipe. The system has the advantages of simple structure, convenient operation and strong practicability.
Description
Technical Field
The invention belongs to the field of energy conservation and environmental protection, and particularly relates to a washing and purging system for an oxidation air pipe of an absorption tower and a working method.
Background
With the continuous development of social economy, the global environment is continuously worsened, and countries in the world make their own contribution to the environment and sustainable development of human co-existence. Low emission and low pollution become the targets of struggle in various countries. Coal-fired power plants are irreparable responsible for reducing environmental pollution as a large household for the emission of pollutants.
Coal-fired power plants generally configure limestone-gypsum wet desulphurization equipment for units to carry out desulphurization on flue gas, thereby reducing environmental pollution. In an oxidation air pipeline in a desulfurization system, slurry is soaked in an absorption tower, the absorption tower is connected with an oxidation air pipe, a pipe orifice of the oxidation air pipe is soaked in the slurry, in order to ensure that chemical reaction in the absorption tower is normally carried out, air needs to be blown into the absorption tower through the oxidation air pipe, and the slurry in the absorption tower is oxidized to improve desulfurization efficiency.
However, since the slurry is doped with many impurities, such as flue gas dust, limestone powder, gypsum, etc., the slurry is easily scaled at the pipe opening of the oxidation air duct, so that the amount of air blown into the absorption tower in unit time is reduced, resulting in insufficient oxidation of the slurry in the absorption tower and lowering of desulfurization efficiency. And the dirt is long-time in the mouth of pipe accumulation of oxidation tuber pipe, and these dirt can block up the oxidation tuber pipe mouth of pipe for in the unable absorption tower that enters through the oxidation tuber pipe drum of air, lead to desulfurization system to stop operation, because desulfurization system can't stop operation alone, need stop operation whole unit, will cause serious economic loss like this.
Generally, an operator firstly stops the desulfurization system and then cleans the orifice of the oxidation air pipe, however, the operator needs to firstly evacuate slurry in the absorption tower and also cleans slurry remained at the bottom of the absorption tower to clean the orifice of the oxidation air pipe, and then can clean dirt at the orifice of the oxidation air pipe, however, the cleaning process takes a long time and consumes a lot of labor.
Therefore, how to effectively reduce the problem of nozzle blockage of the oxidation air duct has become a technical problem that researchers in the field need to solve urgently.
Disclosure of Invention
The invention aims to overcome the defects and provides a flushing and purging system and a working method for an oxidation air pipe of an absorption tower, which can effectively reduce the blocking frequency of the oxidation air pipe opening of the absorption tower.
In order to achieve the aim, the absorption tower oxidation air pipe flushing and purging system comprises an oxidation air main pipe, a flushing pipe main pipe, an oxidation air vertical branch pipe, a flushing pipe branch pipe and an oxidation air horizontal branch pipe;
the oxidation air main pipe is connected with the oxidation fan at one end, is connected with a plurality of oxidation air horizontal branch pipes at the other end, is connected with a plurality of flushing pipe branch pipes, and is connected with the oxidation air horizontal branch pipes, the oxidation air vertical pipeline is vertically connected with the oxidation air horizontal pipeline, the oxidation air horizontal branch pipes are horizontally fixed on the outer surface of the absorption tower, and the oxidation air horizontal branch pipes are connected into the absorption tower.
The washing pipe main pipe is connected with an oxidizing air blowing pipe, and the oxidizing air blowing pipe is connected with an oxidizing air main pipe.
The oxidation air main pipe, the flushing pipe main pipe, the oxidation air sweeping pipe, the oxidation air vertical branch pipe, the flushing pipe branch pipe, the oxidation air horizontal branch pipe and the connection part are all arranged outside the absorption tower.
The oxidation air main pipe and the oxidation air horizontal branch pipe are vertically arranged.
The number of the oxidation wind horizontal branch pipes is the same as that of the washing pipe branch pipes.
The flushing pipe branch pipe is perpendicular to the oxidation wind horizontal branch pipe.
Each oxidation air branch pipe is provided with an independent flushing control valve.
The oxidation air main pipe, the flushing pipe main pipe, the oxidation air sweeping pipe, the oxidation air vertical branch pipe, the flushing pipe branch pipe and the oxidation air horizontal branch pipe are all circular pipelines.
A working method of an absorption tower oxidation air pipe flushing and purging system is characterized in that when a pipe orifice of an oxidation air horizontal pipe needs to be flushed, a valve located at a water inlet end on a flushing pipe main pipe is opened firstly, then a valve of a flushing pipe branch pipe needing to be flushed is opened directly, pressure water enters the flushing pipe branch pipe from the flushing pipe main pipe, the pressure water is flushed into an oxidation air vertical branch pipe, the pipe orifice of the oxidation air horizontal branch pipe is flushed finally, after flushing is finished, the valve on the oxidation air vertical branch pipe pipeline is closed firstly, and then the valve located at the water inlet end on the flushing pipe main pipe is closed.
And when the flushing pipe main pipe and the flushing pipe branch pipe need to be purged, opening a valve on the oxidation air purge pipeline.
Compared with the prior art, the invention opens the valve of the flushing water pipe to complete the flushing of the oxidation air pipe when the oxidation air pipe is found to be blocked by scale and needs to be flushed, and can pressurize the flushing water, thereby being more beneficial to clearing away the blocking object. In addition, the system can be used for washing when the unit is shut down, and can also be used for washing when the unit is operated, so that the unit is prevented from being shut down and overhauled due to blockage of the oxidation air pipe. The system has the advantages of simple structure, convenient operation and strong practicability.
Furthermore, the invention can utilize the oxidizing air to sweep the pipeline to sweep the flushing pipeline, thereby preventing the flushing pipeline from being blocked by impurities.
When the pipe orifice of the oxidation air horizontal pipe needs to be flushed, the method firstly opens the valve at the water inlet end of the flushing pipe main pipe, then directly opens the valve of the flushing pipe branch pipe needing to be flushed, pressure water enters the flushing pipe branch pipe from the flushing pipe main pipe, the pressure water is flushed into the oxidation air vertical branch pipe, finally flushes the pipe orifice of the oxidation air horizontal branch pipe, and flushes the oxidation air pipe regularly, so that the pressure water can flush dirt at the pipe orifice of the oxidation air horizontal branch pipe in time, and therefore the method can effectively reduce the frequency of blockage of the pipe orifice of the oxidation air pipe.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a view showing the installation positions of the respective pipes in the present invention.
Wherein, 1 is an absorption tower, 2 is an oxidation air main pipe, 3 is an oxidation air vertical branch pipe, 4 is a flushing pipe main pipe, 5 is an oxidation air sweeping pipe, 6 is a flushing pipe branch pipe, 7 is an oxidation air horizontal branch pipe, and 8 is a valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the system for washing and purging the oxidation air pipe of the absorption tower comprises an oxidation air main pipe 2, a flushing pipe main pipe 4, an oxidation air vertical branch pipe 3, an oxidation air blowing pipe 5, a flushing pipe branch pipe 6 and an oxidation air horizontal branch pipe 7, wherein the oxidation air main pipe 2, the flushing pipe main pipe 4, the oxidation air blowing pipe 5, the oxidation air vertical branch pipe 3, the flushing pipe branch pipe 6, the oxidation air horizontal branch pipe 7 and joints are all arranged outside the absorption tower 1, and the oxidation air main pipe 2, the flushing pipe main pipe 4, the oxidation air blowing pipe 5, the oxidation air vertical branch pipe 3, the flushing pipe branch pipe 6 and the oxidation air horizontal branch pipe 7 are all round pipelines.
The oxidation air main pipe 2 is connected with an oxidation fan at one end, the other end is connected with a plurality of oxidation air horizontal branch pipes 7, each oxidation air branch pipe 7 is provided with an independent flushing control valve 8, the oxidation air main pipe 2 and the oxidation air horizontal branch pipes 7 are vertically arranged, the flushing pipe main pipe 4 is connected with a plurality of flushing pipe branch pipes 6, the number of the oxidation air horizontal branch pipes 7 is the same as that of the flushing pipe branch pipes 6, the flushing pipe branch pipes 6 are connected with the oxidation air horizontal branch pipes 7, the flushing pipe branch pipes 6 are vertically arranged with the oxidation air horizontal branch pipes 7, the flushing pipe main pipe 4 is connected with the oxidation air purging pipe 5, the oxidation air purging pipe 5 is connected with the oxidation air main pipe 2, the oxidation air vertical pipeline 7 is vertically connected with the oxidation air horizontal pipeline 3, the oxidation air horizontal branch pipes 3 are horizontally fixed on the outer surface of the absorption tower 1, and the oxidation air horizontal branch pipes 3 are connected into.
The air inlet direction of the oxidation air main pipe 2 and the oxidation air branch pipe 7 is the flowing direction of the whole air from the air inlet end to the air outlet end in the oxidation air pipe, the water inlet direction of the washing pipe main pipe 4 and the washing pipe branch pipe 6 is the flowing direction of the whole pressure water from the water inlet end to the water outlet end in the washing pipe, and the inner diameter of the oxidation air branch pipe 7 and the inner diameter of the washing pipe branch pipe 6 have a fixed color difference.
The specific working process of the invention is as follows:
generally, the place most prone to blockage is the connection position of the oxidation air vertical branch pipe 7 and the oxidation air horizontal branch pipe 3, when a user finds that the pipe orifice of the oxidation air horizontal pipe 3 needs to be flushed in the operation process of the unit, a valve located at the water inlet end of the flushing pipe main pipe 4 is opened first, then the valve of the branch pipe needing to be flushed is directly opened, pressure water enters the flushing pipe branch pipe 6 from the flushing pipe main pipe 4, the pressure water is flushed into the oxidation air vertical branch pipe 7, the pipe orifice of the oxidation air horizontal branch pipe 3 is flushed finally, after flushing is finished, the valve on the pipeline of the oxidation air vertical branch pipe 7 is closed first, and then the valve located at the water inlet end of the flushing pipe main pipe 4 is closed.
As can be seen from the above description, in the flushing device provided by the present invention, when the pipe orifice of the oxidizing wind horizontal branch pipe 3 needs to be flushed, after the valves are opened in the above order, the pressure water enters the flushing pipe branch pipe 6 from the flushing pipe main pipe 4, and the pressure water is flushed into the oxidizing wind vertical branch pipe 7, and finally enters the absorption tower 4 through the oxidizing wind horizontal branch pipe 3. When the pressure water passes through the oxidation wind vertical branch pipe 7, the pressure water has certain impact force, so the pressure water can impact dirt at the pipe orifice of the oxidation wind horizontal branch pipe 3, and the aim of cleaning the pipe orifice of the oxidation horizontal branch pipe 3 is fulfilled. The oxidation air pipe is flushed regularly, so that the pressure water can flush the dirt at the pipe orifice of the oxidation air horizontal branch pipe 3 in time, and the device can effectively reduce the frequency of blockage of the pipe orifice of the oxidation air pipe.
On the other hand, the pressure water in the flushing main pipe 4 also contains impurities, precipitates and the like, which can cause the blockage of the flushing pipeline, a section of oxidizing air blowing and sweeping pipeline 5 is additionally arranged between the tail end of the flushing main pipe 4 and the oxidizing air main pipe 2, and a valve on the oxidizing air blowing and sweeping pipeline 5 is opened at regular time to blow the flushing main pipe 4 and the flushing branch pipe 6, so that the blockage frequency of the flushing main pipe 4 and the flushing branch pipe 6 can be effectively reduced. Meanwhile, the oxidation air blowing pipeline 5 is additionally arranged, so that pressurized water can be further pressurized when the pressurized water washes the oxidation pipeline, larger impact force is formed, and blockage dirt can be cleaned more conveniently.
Meanwhile, when the flushing and blowing device works, water is required to be supplemented when the absorption tower 1 runs, and pressure water is directly remained in the absorption tower 1 after the oxidizing air pipe is flushed, so that water required by the device during working is supplemented, and the waste of energy is effectively reduced; meanwhile, the flushing pipe main pipe 2, a pit pump of the absorption tower and a slurry circulating pump are the same flushing pipeline, so that the energy loss is further reduced, and the energy recycling is realized.
Further, when the unit is stopped or the pressure of the oxidizing air is insufficient, the valve at the water inlet end of the flushing pipe main pipe 4 is opened first, then the valve needing the oxidizing air branch pipe 7 is opened, the pressure in the oxidizing air branch pipe 7 can be maintained, the slurry backflow phenomenon can be prevented, and the blockage of the whole pipeline and the damage of an oxidizing fan are avoided.
Furthermore, all the pipeline arrangement connections of the flushing and purging device are arranged outside the absorption tower 1, so that the pipeline opening, installation and maintenance are facilitated for constructors, and meanwhile, the valve opening and closing are facilitated for operators.
Claims (10)
1. A washing and purging system for an oxidation air pipe of an absorption tower is characterized by comprising an oxidation air main pipe (2), a washing pipe main pipe (4), an oxidation air vertical branch pipe (3), a washing pipe branch pipe (6) and an oxidation air horizontal branch pipe (7);
the oxidation fan is connected to oxidation wind female pipe (2) one end, and a plurality of oxidation wind horizontal branch pipes (7) are connected to the other end, and a plurality of flushing pipe branch pipes (6) are connected to flushing pipe female pipe (4), and oxidation wind horizontal branch pipe (7) are connected in flushing pipe branch pipe (6), and the vertical pipeline of oxidation wind (7) is connected with oxidation wind horizontal pipeline (3) perpendicularly, and oxidation wind horizontal branch pipe (3) level is fixed at absorption tower (1) surface, and oxidation wind horizontal branch pipe (3) insert absorption tower (1).
2. The system for washing and purging the oxidation air pipe of the absorption tower according to claim 1, wherein the washing pipe header (4) is connected with the oxidation air purging pipe (5), and the oxidation air purging pipe (5) is connected with the oxidation air header (2).
3. The system for washing and purging the oxidation air pipe of the absorption tower as claimed in claim 2, wherein the oxidation air main pipe (2), the washing air main pipe (4), the oxidation air purging pipe (5), the oxidation air vertical branch pipe (3), the washing pipe branch pipe (6), the oxidation air horizontal branch pipe (7) and the connection part are all arranged outside the absorption tower (1).
4. The system for washing and purging the oxidation air pipe of the absorption tower as claimed in claim 1, wherein the oxidation air main pipe (2) and the oxidation air horizontal branch pipe (7) are vertically arranged.
5. The system for washing and purging the oxidation air pipe of the absorption tower as claimed in claim 1, wherein the number of the oxidation air horizontal branch pipes (7) is the same as that of the washing pipe branch pipes (6).
6. The system for washing and purging the oxidation air pipe of the absorption tower as claimed in claim 1, wherein the washing pipe branch pipe (6) is arranged perpendicular to the oxidation air horizontal branch pipe (7).
7. The system for flushing and purging the oxidation air pipe of the absorption tower as claimed in claim 1, wherein each oxidation air branch pipe (7) is provided with a separate flushing control valve (8).
8. The system for washing and purging the oxidation air pipe of the absorption tower as claimed in claim 1, wherein the oxidation air main pipe (2), the washing air main pipe (4), the oxidation air purging pipe (5), the oxidation air vertical branch pipe (3), the washing air branch pipe (6) and the oxidation air horizontal branch pipe (7) are all circular pipes.
9. The working method of the absorption tower oxidation air duct washing and purging system as claimed in claim 1, characterized in that when the opening of the oxidation air horizontal pipe (3) needs to be washed, the valve at the water inlet end of the washing main pipe (4) is opened first, then the valve of the washing branch pipe (6) needing to be washed is opened directly, the pressure water enters the washing branch pipe (6) from the washing main pipe (4), the pressure water is flushed into the oxidation air vertical branch pipe (7), and finally the opening of the oxidation air horizontal branch pipe (3) is washed, after the washing is finished, the valve on the pipeline of the oxidation air vertical branch pipe (7) is closed first, and then the valve at the water inlet end of the washing main pipe (4) is closed.
10. The working method of the washing and purging system for the oxidation air pipe of the absorption tower as claimed in claim 9, wherein when the washing main pipe (4) and the washing branch pipe (6) need to be purged, a valve on the oxidation air purging pipeline (5) is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011290956.1A CN112222118A (en) | 2020-11-17 | 2020-11-17 | Absorption tower oxidation air pipe flushing and purging system and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011290956.1A CN112222118A (en) | 2020-11-17 | 2020-11-17 | Absorption tower oxidation air pipe flushing and purging system and working method |
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| Publication Number | Publication Date |
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| CN112222118A true CN112222118A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011290956.1A Pending CN112222118A (en) | 2020-11-17 | 2020-11-17 | Absorption tower oxidation air pipe flushing and purging system and working method |
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| CN (1) | CN112222118A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007715A (en) * | 2012-12-20 | 2013-04-03 | 华润电力登封有限公司 | Washing device of oxidation air pipe in desulphurization system |
| US20130195728A1 (en) * | 2010-05-14 | 2013-08-01 | Houjie Sun | Wet flue gas desulfurization absorption tower for for power plant |
| CN203329616U (en) * | 2013-07-05 | 2013-12-11 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Oxidation air conveying device for desulfurization absorption tower of thermal power plant |
| CN205392168U (en) * | 2016-03-08 | 2016-07-27 | 北京峰业电力环保工程有限公司 | Absorption tower thick liquid oxidation unit |
| CN205570066U (en) * | 2016-03-06 | 2016-09-14 | 张乐鑫 | Oxidation tuber pipe blows stifled device |
| CN206103696U (en) * | 2016-09-05 | 2017-04-19 | 大唐环境产业集团股份有限公司 | Waterproof device that flows backward of wet flue gas desulfurization oxidation tuber pipe |
| CN207951102U (en) * | 2017-12-15 | 2018-10-12 | 大唐河北发电有限公司马头热电分公司 | A kind of wet desulphurization absorption tower oxidation air apparatus for eliminating sludge |
| CN209076413U (en) * | 2018-11-08 | 2019-07-09 | 佛山市莫森环境工程有限公司 | A kind of modified form smoke-gas wet desulfurization oxidation air system |
-
2020
- 2020-11-17 CN CN202011290956.1A patent/CN112222118A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130195728A1 (en) * | 2010-05-14 | 2013-08-01 | Houjie Sun | Wet flue gas desulfurization absorption tower for for power plant |
| CN103007715A (en) * | 2012-12-20 | 2013-04-03 | 华润电力登封有限公司 | Washing device of oxidation air pipe in desulphurization system |
| CN203329616U (en) * | 2013-07-05 | 2013-12-11 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Oxidation air conveying device for desulfurization absorption tower of thermal power plant |
| CN205570066U (en) * | 2016-03-06 | 2016-09-14 | 张乐鑫 | Oxidation tuber pipe blows stifled device |
| CN205392168U (en) * | 2016-03-08 | 2016-07-27 | 北京峰业电力环保工程有限公司 | Absorption tower thick liquid oxidation unit |
| CN206103696U (en) * | 2016-09-05 | 2017-04-19 | 大唐环境产业集团股份有限公司 | Waterproof device that flows backward of wet flue gas desulfurization oxidation tuber pipe |
| CN207951102U (en) * | 2017-12-15 | 2018-10-12 | 大唐河北发电有限公司马头热电分公司 | A kind of wet desulphurization absorption tower oxidation air apparatus for eliminating sludge |
| CN209076413U (en) * | 2018-11-08 | 2019-07-09 | 佛山市莫森环境工程有限公司 | A kind of modified form smoke-gas wet desulfurization oxidation air system |
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