CN114669111A - Gypsum dehydration system and online sampling method of filtrate water of gypsum dehydration system - Google Patents
Gypsum dehydration system and online sampling method of filtrate water of gypsum dehydration system Download PDFInfo
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- CN114669111A CN114669111A CN202210461483.XA CN202210461483A CN114669111A CN 114669111 A CN114669111 A CN 114669111A CN 202210461483 A CN202210461483 A CN 202210461483A CN 114669111 A CN114669111 A CN 114669111A
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- filtrate water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
- B01D33/17—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with rotary filtering tables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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Abstract
The invention discloses a gypsum dewatering system and a filtrate water online sampling method thereof, wherein the vacuum dewatering system is communicated with a gas-liquid separator through a vacuum pipeline, the gas-liquid separator is communicated with a vacuum pump through an air pipeline, the gas-liquid separator is communicated with a filtrate water tank through a filtrate water pipeline, a filtrate water sampling device comprises a filtrate water sampling pipeline, a first control valve and a second control valve, one end of the filtrate water sampling pipeline is communicated with the filtrate water pipeline, the first control valve and the second control valve are arranged on the filtrate water sampling pipeline and are sequentially arranged along the water outlet direction of the filtrate water sampling pipeline, and the other end of the filtrate water sampling pipeline is a sampling port. According to the invention, through the matched control of the first control valve and the second control valve on the filtrate water sampling pipeline, the filtrate water in the gas-liquid separator can be separately extracted under the condition that the normal operation of the gypsum dehydration system is not influenced.
Description
Technical Field
The invention belongs to the field of energy conservation and environmental protection, and relates to a gypsum dewatering system and a filtrate water online sampling method thereof.
Background
With the stricter control on the wastewater discharge standard and the total regional wastewater discharge amount, the operating stability of each wastewater treatment system of the thermal power plant is high in order to ensure the sustainable development of the thermal power industry. The limestone-gypsum method desulfurization process is taken as the mainstream desulfurization process of the thermal power plant, and the generated desulfurization wastewater is the wastewater with the worst water quality and the most difficult treatment in the thermal power plant.
The water quality of the desulfurization wastewater has the characteristics of high suspended matters, high salt content, high heavy metals, high hardness and the like, and the desulfurization wastewater treatment process conventionally adopts a neutralization-precipitation-flocculation triple-box treatment process, an electric flocculation treatment process and a high-efficiency integrated treatment process. However, the processes have the problems of high medicament cost, high failure rate, substandard suspended matter discharge, low operation output and the like, and the operation stability of the desulfurization wastewater treatment system is seriously influenced.
The main reason for the above problem is that the actual suspended matter concentration in the desulfurization waste water is greatly deviated from the designed concentration of the suspended matter in the desulfurization waste water treatment system. The solid content of the wastewater is generally designed to be less than 1.5% in the design of the desulfurization wastewater treatment system, namely the concentration of suspended matters is less than 15000mg/L, but the actual solid content of the desulfurization wastewater is far higher than 1.5% and even reaches 15% due to the poor operation condition of a wet desulfurization device and poor quality of desulfurization process water. Therefore, how to reduce the concentration of suspended matters in the desulfurization wastewater is the key to solve the problem of stable operation of the desulfurization wastewater treatment system.
The conventional water source used as a desulfurization wastewater treatment system has three places: overflow of the waste water cyclone, filtrate water in the filtrate water tank and filtrate water in the gas-liquid separator of the gypsum dewatering system. The overflow of the waste water cyclone is used as a main water source of the desulfurization waste water treatment system, the solid content rate of the waste water cyclone is highest, the solid content rate of the two kinds of water in the latter is influenced by the operation condition of desulfurization, and the two kinds of water cannot be determined to be high or low but are lower than the solid content rate of the overflow of the waste water cyclone.
Because the gas-liquid separator operates in a vacuum negative pressure state, the water in the filtrate water tank not only contains the filtrate water in the gas-liquid separator, but also contains overflow liquid of a waste water cyclone, sealing water of a vacuum pump and the like. The existing system can not independently extract filtrate water in the gas-liquid separator to test the concentration of suspended matters.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a gypsum dehydration system and an online sampling method of filtrate water thereof.
The technical scheme adopted by the invention is as follows:
the utility model provides a gypsum dewatering system, including gypsum dewatering device, gas-liquid separator, vacuum pump and filtrate water sampling device, vacuum dewatering system passes through vacuum pipeline and gas-liquid separator intercommunication, gas-liquid separator passes through air pipe and vacuum pump intercommunication, gas-liquid separator leads to filtrate water pipeline and filtrate water reservoir intercommunication, filtrate water sampling device includes filtrate water sampling pipe, first control flap and second control flap, filtrate water sampling pipe's one end and filtrate water pipeline intercommunication, first control flap and second control flap set gradually on filtrate water sampling pipe and along filtrate water sampling pipe's play water direction, the other end of filtrate water sampling pipe is the sample connection.
Preferably, the first control valve is arranged at the end part of one end of the filtrate water sampling pipeline connected with the filtrate water pipeline.
Preferably, the filtrate water sampling pipe is arranged in a downward inclination manner.
Preferably, the outlet of the filtrate water sampling pipeline is detachably connected with a drain pipe, and the outlet of the drain pipe extends to a drainage ditch.
Preferably, the gas-liquid two-phase outflow port of the gypsum dewatering device is communicated with the gas-liquid separator through a vacuum pipeline.
Preferably, a gas outlet in the gas-liquid separator is communicated with the vacuum pump through an air pipeline, and a filtrate water outlet in the gas-liquid separator is communicated with the filtrate water tank through a filtrate water pipeline.
Preferably, the first control valve adopts an electric butterfly valve or a manual butterfly valve, and the second control valve adopts an electric butterfly valve or a manual butterfly valve.
Preferably, the diameter of the filtrate water sampling pipeline is 20mm-50 mm.
Preferably, the gypsum dewatering device is a disc dewaterer or a vacuum belt dewaterer.
The sampling method of the gypsum dewatering system comprises the following steps:
when the vacuum pump operates and the gas-liquid separator normally works, the first control valve is in an opening state or a closing state at the moment, and the second control valve is in a closing state;
when sampling is needed, if the first control valve is in a closed state at the moment, the first control valve is opened, so that filtrate water in the filtrate water pipeline enters the filtrate water sampling pipeline, and the first control valve is opened for a preset time and then closed; then opening a second control valve, discharging the filtrate water from the outlet of the filtrate water sampling pipeline, and sampling; after sampling is finished, the second control valve is closed, and the first control valve is opened or is kept in a closed state continuously;
when sampling is needed, if the first control valve is in an open state at the moment, and filtrate water is filled in the filtrate water sampling pipeline at the moment, then the first control valve is closed; then opening a second control valve, discharging the filtrate water from the outlet of the filtrate water sampling pipeline, and sampling; and after sampling is finished, closing the second control valve, and opening or continuously keeping the first control valve in a closed state.
The invention has the following beneficial effects:
when the gypsum dewatering system is in specific operation and the vacuum pump runs, the lower part of the gas-liquid separator and the filtrate water pipe form a vacuum state through the water seal of the filtrate water tank. Under the conventional state of the filtrate water sampling device, the second control valve is in a closed state, and the first control valve is in an open or closed state. When the filtrate water sample is extracted, if the first control valve is in a closed state, the first control valve is opened first, filtrate water in the filtrate water pipeline is put into the filtrate water sampling pipeline, then the first control valve is closed, then the second control valve is opened, sampling is carried out through an outlet of the filtrate water sampling pipeline, and then the second control valve is closed. When the filtrate water sample is extracted, if the first control valve is in an open state, the first control valve is closed, then the second control valve is opened, sampling is carried out through the outlet of the filtrate water sampling pipeline, then the second control valve is closed, and then the first control valve is opened. First control flap and second control flap can cooperate in a flexible way, are not limited to above-mentioned sample mode, but will guarantee when the sample that first control flap is the off-state, keep vapour and liquid separator lower part and filtrating water pipeline to be in vacuum state all the time promptly to prevent that filtrating water pipeline passes through filtrating water sample pipeline and external intercommunication when second control flap opens, lead to unable sample, and also probably lead to the fact the influence to operating personnel's safety. The invention can be transformed by utilizing the existing filtrate water pipeline, has the advantages of less transformation workload, reliable operation, convenient and simple maintenance, no influence on the normal operation of the gypsum dewatering device during sampling and convenient popularization and application.
Drawings
FIG. 1 is a schematic diagram of a gypsum dewatering system of the present invention;
FIG. 2 is a schematic diagram of another gypsum dewatering system of the present invention.
Wherein, 1 is a gypsum dewatering device, 2 is a vacuum pipeline, 3 is a gas-liquid separator, 4 is a vacuum pump, 5 is a filtrate water pipeline, 6 is a filtrate water tank, 7 is a filtrate water sampling device, 8 is a filtrate water sampling pipeline, 9 is a first control valve, 10 is a second control valve, and 11 is an air pipeline.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the gypsum dewatering system of the present invention includes a gypsum dewatering device 1, a gas-liquid separator 3, a vacuum pump 4 and a filtrate water sampling device 7, the vacuum dewatering system 1 is communicated with the gas-liquid separator 3 through a vacuum pipeline 2, the gas-liquid separator 3 is communicated with the vacuum pump 4 through an air pipeline 11, the gas-liquid separator 3 is communicated with a filtrate water tank 6 through a filtrate water pipeline 5, the filtrate water sampling device 7 includes a filtrate water sampling pipeline 8, a first control valve 9 and a second control valve 10, one end of the filtrate water sampling pipeline 8 is communicated with the filtrate water pipeline 5, the first control valve 9 and the second control valve 10 are disposed on the filtrate water sampling pipeline 8 and are sequentially disposed along a water outlet direction of the filtrate water sampling pipeline 8, and the other end of the filtrate water sampling pipeline 8 is a sampling port. The first control valve 9 and the second control valve 10 may be of the type electric butterfly valve or manual butterfly valve. The material type of the filtrate water sampling pipeline 8 can be consistent with that of the filtrate water pipeline 5, and can also be a rubber-lined pipeline, a glass steel pipeline or other corrosion-resistant pipelines, and the pipe diameter of the filtrate water sampling pipeline 8 is 20mm-50 mm. Gas-liquid two-phase flow in the gas-liquid separator 3, wherein the gas is communicated with a vacuum pump 4 through an air pipeline 11, and filtrate water is communicated with a filtrate water pool 6 through a filtrate water pipeline 5.
When the gypsum dewatering system works, the vacuum pump 4 runs, the lower part of the gas-liquid separator 3 and the filtrate water pipeline 5 form a vacuum state through the water seal of the filtrate water tank 6. The filtrate water sampling device 7 opens the first control valve 9 and closes the second control valve 10 in a normal state. When the filtrate water sample is extracted, the first control valve 9 is closed first, and then the second control valve 10 is opened. And in the sampling process, the lower part of the gas-liquid separator and the filtrate water pipeline are always kept in a vacuum state.
In the technical scheme of the invention, in order to prevent the particles in the filtrate water from depositing in the filtrate water sampling pipeline 8 and further blocking the filtrate water sampling pipeline 8, the first control valve 9 can be arranged at the end part of one end, connected with the filtrate water pipeline 5, of the filtrate water sampling pipeline 8, namely the first control valve 9 is arranged at the leftmost end of the filtrate water sampling pipeline 8 as far as possible, so that the sediment deposited in the filtrate water sampling pipeline 8 can be discharged along with the discharge of the filtrate water during sampling, and the sediment phenomenon in the filtrate water sampling pipeline 8 can be effectively prevented. In addition, even if the operation process of periodic repeated sampling is not used for sampling temporarily, the filtrate water sampling pipeline 8 is flushed by using the filtrate water, and the precipitation phenomenon in the filtrate water sampling pipeline 8 can be effectively prevented.
In the technical scheme of the invention, the filtrate water sampling pipeline 8 can be inclined downwards, so that if the filtrate water sampling pipeline 8 is precipitated, the precipitate can be more easily taken out along with the outflow of the filtrate water, and the precipitation phenomenon in the filtrate water sampling pipeline 8 is effectively prevented.
In the technical scheme of the invention, the outlet of the filtrate water sampling pipeline 8 can be detachably connected with a drain pipe, and redundant filtrate water can be discharged to the drain ditch by utilizing the drain pipe, so that the cleanness of the field operation environment is ensured.
Referring to fig. 1 and 2, the gypsum dewatering device 1 can be a disc dewaterer or a vacuum belt dewaterer.
The invention can be transformed by utilizing the existing filtrate water pipeline, has the advantages of less transformation workload, reliable operation, convenient and simple maintenance, no influence on the normal operation of the gypsum dewatering device during sampling and convenient popularization and application.
Claims (10)
1. A gypsum dewatering system is characterized by comprising a gypsum dewatering device (1), a gas-liquid separator (3), a vacuum pump (4) and a filtrate water sampling device (7), wherein the vacuum dewatering system (1) is communicated with the gas-liquid separator (3) through a vacuum pipeline (2), the gas-liquid separator (3) is communicated with the vacuum pump (4) through an air pipeline (11), the gas-liquid separator (3) is communicated with a filtrate water tank (6) through a filtrate water pipeline (5), the filtrate water sampling device (7) comprises a filtrate water sampling pipeline (8), a first control valve (9) and a second control valve (10), one end of the filtrate water sampling pipeline (8) is communicated with the filtrate water pipeline (5), the first control valve (9) and the second control valve (10) are arranged on the filtrate water sampling pipeline (8) and are sequentially arranged along the water outlet direction of the filtrate water sampling pipeline (8), the other end of the filtrate water sampling pipeline (8) is a sampling port.
2. A gypsum dewatering system according to claim 1, characterized in that the first control valve (9) is arranged at the end of the filtrate water sampling pipe (8) which is connected to the filtrate water pipe (5).
3. A gypsum dewatering system according to claim 1 or 2, characterized in that the filtrate water sampling pipe (8) is arranged inclined downwards.
4. A gypsum dewatering system according to claim 3, characterized in that the outlet of the filtrate water sampling pipe (8) is detachably connected with a drain pipe, the outlet of which extends to a drain.
5. A gypsum dewatering system according to claim 1, characterized in that the outlet of the gypsum dewatering device (1) is connected to the gas-liquid separator (3) via a vacuum pipe (2).
6. A gypsum dewatering system according to claim 1, characterized in that the gas outlet in the gas-liquid separator (3) is connected to the vacuum pump (4) via an air conduit (11) and the filtrate water outlet in the gas-liquid separator (3) is connected to the filtrate water tank (6) via a filtrate water conduit (5).
7. A gypsum dewatering system according to claim 1, characterized in that the first control valve (9) is an electric butterfly valve or a manual butterfly valve and the second control valve (10) is an electric butterfly valve or a manual butterfly valve.
8. A gypsum dewatering system according to claim 1, wherein the filtrate water sampling pipe (8) is 20mm to 50mm in pipe diameter.
9. A gypsum dewatering system according to claim 1, characterized in that the gypsum dewatering device (1) is a disc dewaterer or a vacuum belt dewaterer.
10. A method of sampling a gypsum dewatering system as claimed in any one of claims 1 to 9, including the steps of:
when the vacuum pump (4) operates and the gas-liquid separator (3) normally works, the first control valve (9) is in an opening state or a closing state at the moment, and the second control valve (10) is in a closing state;
when sampling is needed, if the first control valve (9) is in a closed state at the moment, the first control valve (9) is opened, so that filtrate water in the filtrate water pipeline (5) enters the filtrate water sampling pipeline (8), and the first control valve (9) is opened for a preset time and then closed; then, opening a second control valve (10), discharging the filtrate water from an outlet of the filtrate water sampling pipeline (8) and sampling; after sampling is finished, the second control valve (10) is closed, and the first control valve (9) is opened or kept in a closed state;
when sampling is needed, if the first control valve (9) is in an open state at the moment, and the filtrate water sampling pipeline (8) is filled with filtrate water at the moment, then the first control valve (9) is closed; then, opening a second control valve (10), discharging the filtrate water from an outlet of the filtrate water sampling pipeline (8) and sampling; after sampling is finished, the second control valve (10) is closed, and the first control valve (9) is opened or kept in a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210461483.XA CN114669111A (en) | 2022-04-28 | 2022-04-28 | Gypsum dehydration system and online sampling method of filtrate water of gypsum dehydration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210461483.XA CN114669111A (en) | 2022-04-28 | 2022-04-28 | Gypsum dehydration system and online sampling method of filtrate water of gypsum dehydration system |
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| CN114669111A true CN114669111A (en) | 2022-06-28 |
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| CN202210461483.XA Pending CN114669111A (en) | 2022-04-28 | 2022-04-28 | Gypsum dehydration system and online sampling method of filtrate water of gypsum dehydration system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012003868A1 (en) * | 2010-07-07 | 2012-01-12 | Hach Lange Gmbh | Wastewater sampling device |
| CN204198514U (en) * | 2014-09-29 | 2015-03-11 | 王伟 | A kind of desulfurization wastewater separation system |
| CN208721459U (en) * | 2018-08-17 | 2019-04-09 | 辽宁新都黄金有限责任公司 | A kind of fluid sampling device during golden production |
| CN109668761A (en) * | 2017-10-13 | 2019-04-23 | 宝山钢铁股份有限公司 | A kind of online high-precision acid solution sampling system and its sampling, maintaining method |
| CN213286345U (en) * | 2020-08-18 | 2021-05-28 | 唐山黑猫炭黑有限责任公司 | Carbon black production waste flue gas desulfurization system |
| CN215232669U (en) * | 2020-10-30 | 2021-12-21 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Water-saving reconstruction device of vacuum dehydration belt conveyor |
| CN216137017U (en) * | 2021-06-28 | 2022-03-29 | 华能国际电力股份有限公司上海石洞口第一电厂 | Filtrate recovery device for wet desulphurization gypsum dewatering system |
-
2022
- 2022-04-28 CN CN202210461483.XA patent/CN114669111A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012003868A1 (en) * | 2010-07-07 | 2012-01-12 | Hach Lange Gmbh | Wastewater sampling device |
| CN204198514U (en) * | 2014-09-29 | 2015-03-11 | 王伟 | A kind of desulfurization wastewater separation system |
| CN109668761A (en) * | 2017-10-13 | 2019-04-23 | 宝山钢铁股份有限公司 | A kind of online high-precision acid solution sampling system and its sampling, maintaining method |
| CN208721459U (en) * | 2018-08-17 | 2019-04-09 | 辽宁新都黄金有限责任公司 | A kind of fluid sampling device during golden production |
| CN213286345U (en) * | 2020-08-18 | 2021-05-28 | 唐山黑猫炭黑有限责任公司 | Carbon black production waste flue gas desulfurization system |
| CN215232669U (en) * | 2020-10-30 | 2021-12-21 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Water-saving reconstruction device of vacuum dehydration belt conveyor |
| CN216137017U (en) * | 2021-06-28 | 2022-03-29 | 华能国际电力股份有限公司上海石洞口第一电厂 | Filtrate recovery device for wet desulphurization gypsum dewatering system |
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