CN111829919A - Slurry circulating pump bypass pipe density and pH value measuring device - Google Patents
Slurry circulating pump bypass pipe density and pH value measuring device Download PDFInfo
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- CN111829919A CN111829919A CN202010757881.7A CN202010757881A CN111829919A CN 111829919 A CN111829919 A CN 111829919A CN 202010757881 A CN202010757881 A CN 202010757881A CN 111829919 A CN111829919 A CN 111829919A
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- slurry
- circulating pump
- densimeter
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- bypass pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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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
- B01D53/14—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
- B01D53/1412—Controlling the absorption process
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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
- B01D53/14—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
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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
- B01D53/14—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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention relates to a device for measuring the density and the pH value of a slurry circulating pump bypass pipe, which comprises a slurry sampling pipe, a slurry circulating pump bypass pipe, a densimeter, a slurry return pipe and a slurry circulating pump, wherein the slurry sampling pipe is connected with the slurry circulating pump bypass pipe; the inlet side of each slurry circulating pump is provided with a slurry circulating pump inlet valve, the outlet pipeline position of each slurry circulating pump is provided with a slurry sampling pipe, each slurry sampling pipe is provided with a slurry sampling pipe isolation valve, and each slurry sampling pipe is converged and connected to the inlet of the slurry circulating pump bypass pipe; and a pH meter with an isolating valve and a densimeter front maintenance isolating valve are sequentially arranged on the slurry circulating pump bypass pipe according to the flow direction. The invention has the beneficial effects that: the invention utilizes the differential pressure of the inlet and the outlet of the slurry circulating pump to enable the slurry sampling pipe, the slurry circulating pump bypass pipe and the slurry return pipe to realize a circulating pipeline, and determines the density and the pH value of gypsum slurry in the absorption tower through the densimeter and the pH meter with the isolating valve which are arranged on the circulating pipeline, the structure is simple and reasonable, and the operation of a gypsum discharge pump can be reduced.
Description
Technical Field
The invention relates to the technical field of wet desulphurization flue gas purification, in particular to a device for measuring the density and the pH value of a bypass pipe of a slurry circulating pump.
Background
In a wet desulphurization system, the slurry density and the pH value are important parameters for controlling the quality of slurry in an absorption tower, and are respectively measured by a densimeter and a pH meter, wherein the slurry density is used for controlling the discharge of gypsum slurry, and the pH value is used for controlling the desulphurization efficiency. Currently, slurry density and pH measurements are generally divided into two categories: one is that the gypsum slurry discharge pump runs continuously, install densimeter and pH meter on the outlet pipeline, and lead a road gypsum slurry to flow back to the absorption tower, this measuring method has higher requirements for the performance of the gypsum slurry pump, and increase the running cost of the pump; the other method is to arrange a slurry measuring pump, lead out a path of slurry from the absorption tower and reflux the slurry to the absorption tower, and install a densimeter and a pH meter on an outlet pipeline of the pump, wherein the measuring method needs to increase the running cost of the slurry measuring pump and the pump.
In view of the above, it is desirable to provide a device for measuring the density and pH of the bypass pipe of the slurry circulating pump to solve the problems of measuring the density and pH of the wet desulfurization slurry.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device for measuring the density and the pH value of a bypass pipe of a slurry circulating pump.
The device for measuring the density and the pH value of the slurry circulating pump bypass pipe comprises a slurry sampling pipe, a slurry circulating pump bypass pipe, a pH meter with an isolation valve, a densimeter, a slurry return pipe and a slurry circulating pump; the inlet side of each slurry circulating pump is provided with a slurry circulating pump inlet valve, the outlet pipeline position of each slurry circulating pump is provided with a slurry sampling pipe, each slurry sampling pipe is provided with a slurry sampling pipe isolation valve, and each slurry sampling pipe is converged and connected to the inlet of the slurry circulating pump bypass pipe; a pH meter with an isolation valve, a densimeter front maintenance isolation valve, a densimeter and a densimeter rear maintenance isolation valve are sequentially arranged on the slurry circulating pump bypass pipe in the flow direction; a densimeter bypass pipe is connected in parallel between the inlet of the front overhaul isolation valve of the densimeter and the outlet of the rear overhaul isolation valve of the densimeter, two ends of the densimeter bypass pipe are respectively connected with the slurry circulating pump bypass pipe, and a densimeter bypass isolation valve is arranged on the densimeter bypass pipe; the outlet of the slurry circulating pump bypass pipe is connected to the inlet of each slurry circulating pump through a slurry return pipe, and a slurry return pipe isolation valve is arranged on each slurry return pipe; a process water flushing valve of the slurry circulating pump bypass pipe and a slurry circulating pump bypass pipe drainage valve are arranged on the circulating pump bypass pipe in a matching way; and signals of the pH meter and the densimeter with the isolating valve are accessed into a desulfurization control system.
Preferably, the method comprises the following steps: the inlet and the outlet of the densimeter are respectively provided with a front overhaul isolation valve of the densimeter and a back overhaul isolation valve of the densimeter.
Preferably, the method comprises the following steps: the pH meter with the isolation valve adopts an online plug-in pH meter.
Preferably, the method comprises the following steps: and a diaphragm pressure gauge is arranged on an outlet pipeline of the overhaul isolation valve behind the densimeter.
Preferably, the method comprises the following steps: the inlet of the slurry circulating pump bypass pipe is provided with a slurry circulating pump bypass pipe process water washing valve, and the outlet of the slurry circulating pump bypass pipe is matched with the pipeline of the maintenance isolation door to be provided with a drainage pipeline and a slurry circulating pump bypass pipe drainage valve.
Preferably, the method comprises the following steps: the slurry return pipe is connected between the inlet valve of the slurry circulating pump and the slurry circulating pump.
Preferably, the method comprises the following steps: the pH meter and the densimeter with the isolating valve are connected with various valves through carbon steel rubber lining short pipes or fiber reinforced composite short pipes with flanges.
The working method of the device for measuring the density and the pH value of the bypass pipe of the slurry circulating pump comprises the following steps:
s1, utilizing the pressure difference between the inlet and the outlet of the slurry circulating pump to make the slurry sampling pipe, the slurry circulating pump bypass pipe and the slurry return pipe realize a circulating pipeline, and determining the density and the pH value of the gypsum slurry in the absorption tower through a densimeter and a pH meter with an isolation valve which are arranged on the circulating pipeline; signals of a pH meter and a densimeter with an isolating valve are accessed into a desulfurization control system to participate in the discharge of gypsum slurry and the control of desulfurization efficiency;
s2, when the densimeter is in fault, opening a bypass isolation valve of the densimeter, and closing a front overhaul isolation valve of the densimeter and a rear overhaul isolation valve of the densimeter to continuously monitor the pH meter with the isolation valves;
and S3, flushing and draining the circulating pump bypass pipe through a slurry circulating pump bypass pipe process water flushing valve and a slurry circulating pump bypass pipe drainage valve on the circulating pump bypass pipe, and draining the slurry circulating pump bypass pipe flushing water to a nearby slurry pipe ditch through the slurry circulating pump bypass pipe drainage valve.
The invention has the beneficial effects that: the invention utilizes the differential pressure of the inlet and the outlet of the slurry circulating pump to enable the slurry sampling pipe, the slurry circulating pump bypass pipe and the slurry return pipe to realize a circulating pipeline, and the density and the pH value of gypsum slurry in the absorption tower are determined by the densimeter and the pH meter with the isolating valve which are arranged on the circulating pipeline.
Drawings
FIG. 1 is a schematic diagram of a device for measuring density and pH value of a bypass pipe of a slurry circulating pump.
Description of reference numerals: the device comprises a slurry sampling pipe 1, a slurry sampling pipe isolation valve 2, a slurry circulating pump bypass pipe process water flushing valve 3, a slurry circulating pump bypass pipe 4, a pH meter 5 with an isolation valve, a densimeter front overhaul isolation valve 6, a densimeter 7, a densimeter rear overhaul isolation valve 8, a densimeter bypass pipe 9, a densimeter bypass isolation valve 10, a diaphragm pressure gauge 11, a slurry circulating pump bypass pipe drainage valve 12, a slurry return pipe isolation valve 13, a slurry return pipe 14, a slurry circulating pump inlet valve 15, a slurry circulating pump 16 and a slurry circulating pump outlet pipeline 17.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
In view of the current measurement mode, the device for measuring the density and the pH value of the bypass pipe of the slurry circulating pump of the wet desulphurization system is arranged without increasing equipment and power consumption. The device for measuring the density and the pH value of the slurry circulating pump bypass pipe comprises a slurry sampling pipe 1, a slurry circulating pump bypass pipe 4, a pH meter 5 with an isolation valve, a densimeter 7, a slurry return pipe 14 and a slurry circulating pump 16; the inlet side of each slurry circulating pump 16 is provided with a slurry circulating pump inlet valve 15, a slurry sampling pipe 1 is arranged at the outlet pipeline position 17 of each slurry circulating pump, a slurry sampling pipe isolation valve 2 is arranged on each slurry sampling pipe 1, and each slurry sampling pipe 1 is converged and connected to the inlet of a slurry circulating pump bypass pipe 4; a pH meter 5 with an isolation valve, a densimeter front overhaul isolation valve 6, a densimeter 7 and a densimeter rear overhaul isolation valve 8 are sequentially arranged on the slurry circulating pump bypass pipe 4 in the flow direction; a densimeter bypass pipe 9 is connected in parallel between the inlet of the densimeter front overhaul isolation valve 6 and the outlet of the densimeter rear overhaul isolation valve 8, two ends of the densimeter bypass pipe 9 are respectively connected with the slurry circulating pump bypass pipe 4, and a densimeter bypass isolation valve 10 is arranged on the densimeter bypass pipe 9; the outlet of the slurry circulating pump bypass pipe 4 is respectively connected to the inlet of each slurry circulating pump 16 through a slurry return pipe 14, and a slurry return pipe isolation valve 13 is arranged on the slurry return pipe 14; signals of a pH meter 5 and a densimeter 7 with isolation valves are accessed into a desulfurization control system to participate in the control of the discharge of gypsum slurry and the desulfurization efficiency; the desulfurization system is provided with a plurality of slurry circulating pumps 16, and when the operation of the slurry circulating pumps is switched, the continuity of slurry measurement can be ensured.
The slurry sampling pipe 1, the slurry sampling pipe isolation valve 2, the slurry circulating pump bypass pipe 4, the slurry return pipe isolation valve 13 and the slurry return pipe 14 realize a circulating pipeline by utilizing the differential pressure of the inlet and the outlet of the slurry circulating pump 16, and the pH value and the density of the gypsum slurry in the absorption tower are determined by a densimeter 7 and a pH meter 5 with the isolation valve which are arranged on the circulating pipeline.
The access and export of densimeter 7 set up maintenance isolation valve 6 before the densimeter and overhaul isolation valve 8 behind the densimeter respectively to set up densimeter by-pass pipe 9 and densimeter bypass isolation valve 10 for densimeter 7, when densimeter 7 trouble, open densimeter bypass isolation valve 10, overhaul isolation valve 6 before closing the densimeter and overhaul isolation valve 8 behind the densimeter, can guarantee the continuous monitoring of the pH meter 5 of taking the isolation valve.
The pH meter 5 with the isolation valve adopts an online plug-in pH meter.
A slurry sampling pipe isolation valve 2 and a slurry return pipe isolation valve 13 are respectively arranged on the slurry sampling pipe 1 and the slurry return pipe 14, and can be used for switching of a circulating pump sampling pipeline, instrument maintenance isolation and slurry circulating pump bypass pipe 4 flushing isolation.
And a diaphragm pressure gauge 11 is arranged on an outlet pipeline (an outlet side of a densimeter bypass pipe 9) of the maintenance isolation valve 8 behind the densimeter and is used for a patrol inspector to judge whether the slurry circulating pump bypass pipe 4 is blocked or not.
The slurry circulating pump bypass pipe process water flushing valve 3 and the slurry circulating pump bypass pipe drainage valve 12 are arranged on the circulating pump bypass pipe 4 and used for flushing and drainage of the circulating pump bypass pipe 4. A process water flushing valve 3 of the slurry circulating pump bypass pipe is arranged at an inlet of a slurry circulating pump bypass pipe 4 (on a collecting pipe at an outlet of a slurry sampling pipe isolation valve 2), a drainage pipeline is arranged on a pipeline (at a lower position) of an inspection isolation door at an outlet of the slurry circulating pump bypass pipe 4 in a matched manner, a slurry circulating pump bypass pipe drainage valve 12 is arranged, and the slurry circulating pump bypass pipe flushing water is drained to a nearby slurry pipe ditch through the slurry circulating pump bypass pipe drainage valve 12.
The slurry return pipe 1 is connected between the slurry circulation pump inlet valve 15 and the slurry circulation pump 16.
The pH meter, the densimeter, various valves and other parts are connected through a carbon steel rubber lining short pipe with a flange or a fiber reinforced composite material short pipe.
The device for measuring the density and the pH value of the bypass pipe of the slurry circulating pump is adopted, the start and stop of the gypsum discharge pump can be controlled according to the measured slurry density, and when the density of the gypsum slurry in the desulfurization absorption tower reaches a set value, the gypsum discharge pump is started to convey the gypsum slurry to a dehydration system for dehydration treatment; when the density of the gypsum slurry in the desulfurization absorption tower does not reach a set value, the gypsum discharge pump is stopped, so that the power consumption for operation is saved, and the energy-saving effect is achieved.
Claims (8)
1. The utility model provides a thick liquid circulating pump bypass pipe density and pH value measuring device which characterized in that: comprises a slurry sampling pipe (1), a slurry circulating pump bypass pipe (4), a pH meter (5) with an isolating valve, a densimeter (7), a slurry return pipe (14) and a slurry circulating pump (16); a slurry circulating pump inlet valve (15) is arranged on the inlet side of each slurry circulating pump (16), a slurry sampling pipe (1) is arranged at the outlet pipeline position (17) of each slurry circulating pump, a slurry sampling pipe isolation valve (2) is arranged on each slurry sampling pipe (1), and each slurry sampling pipe (1) is converged and connected to the inlet of a slurry circulating pump bypass pipe (4); a pH meter (5) with an isolation valve, a densimeter front maintenance isolation valve (6), a densimeter (7) and a densimeter rear maintenance isolation valve (8) are sequentially arranged on the slurry circulating pump bypass pipe (4) according to the flow direction; a densimeter bypass pipe (9) is connected in parallel between the inlet of the densimeter front overhaul isolation valve (6) and the outlet of the densimeter rear overhaul isolation valve (8), two ends of the densimeter bypass pipe (9) are respectively connected with the slurry circulating pump bypass pipe (4), and a densimeter bypass isolation valve (10) is arranged on the densimeter bypass pipe (9); the outlet of the slurry circulating pump bypass pipe (4) is respectively connected to the inlet of each slurry circulating pump (16) through a slurry return pipe (14), and a slurry return pipe isolation valve (13) is arranged on the slurry return pipe (14); a slurry circulating pump bypass pipe process water flushing valve (3) and a slurry circulating pump bypass pipe drainage valve (12) are arranged on the circulating pump bypass pipe (4) in a matching way; and a pH meter (5) with an isolation valve and a densimeter (7) with signals are connected into a desulfurization control system.
2. The slurry circulation pump bypass line density and pH measurement device of claim 1, wherein: the inlet and the outlet of the densimeter (7) are respectively provided with a densimeter front overhaul isolation valve (6) and a densimeter rear overhaul isolation valve (8).
3. The slurry circulation pump bypass line density and pH measurement device of claim 1, wherein: the pH meter (5) with the isolation valve adopts an online plug-in pH meter.
4. The slurry circulation pump bypass line density and pH measurement device of claim 1, wherein: and a diaphragm pressure gauge (11) is arranged on an outlet pipeline of the overhaul isolation valve (8) behind the densimeter.
5. The slurry circulation pump bypass line density and pH measurement device of claim 1, wherein: the inlet of the slurry circulating pump bypass pipe (4) is provided with a slurry circulating pump bypass pipe process water flushing valve (3), and the outlet of the slurry circulating pump bypass pipe (4) is matched with the pipeline of the maintenance isolation door to be provided with a drainage pipeline and a slurry circulating pump bypass pipe drainage valve (12).
6. The slurry circulation pump bypass line density and pH measurement device of claim 1, wherein: the slurry return pipe (1) is connected between the slurry circulating pump inlet valve (15) and the slurry circulating pump (16).
7. The slurry circulation pump bypass line density and pH measurement device of claim 1, wherein: the pH meter (5) and the densimeter (7) with the isolation valve are connected with various valves through carbon steel rubber lining short pipes or fiber reinforced composite short pipes with flanges.
8. A method of operating the slurry circulation pump bypass line density and pH measurement device of claim 1, comprising the steps of:
s1, realizing a circulation pipeline by using a slurry sampling pipe (1), a slurry circulating pump bypass pipe (4) and a slurry return pipe (14) through differential pressure of an inlet and an outlet of a slurry circulating pump (16), and determining the density and the pH value of gypsum slurry in the absorption tower through a density meter (7) and a pH meter (5) with an isolation valve which are arranged on the circulation pipeline; signals of a pH meter (5) and a densimeter (7) with an isolating valve are connected into a desulfurization control system to participate in the control of the discharge of gypsum slurry and the desulfurization efficiency;
s2, when the densimeter (7) is in fault, opening a densimeter bypass isolation valve (10), closing a densimeter front overhaul isolation valve (6) and a densimeter rear overhaul isolation valve (8), and continuously monitoring the pH meter (5) with the isolation valves;
s3, the circulation pump bypass pipe (4) is flushed and drained through the slurry circulation pump bypass pipe process water flushing valve (3) and the slurry circulation pump bypass pipe drainage valve (12) on the circulation pump bypass pipe (4), and the slurry circulation pump bypass pipe flushing water is drained to a nearby slurry pipe ditch through the slurry circulation pump bypass pipe drainage valve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010757881.7A CN111829919A (en) | 2020-07-31 | 2020-07-31 | Slurry circulating pump bypass pipe density and pH value measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010757881.7A CN111829919A (en) | 2020-07-31 | 2020-07-31 | Slurry circulating pump bypass pipe density and pH value measuring device |
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| Publication Number | Publication Date |
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| CN111829919A true CN111829919A (en) | 2020-10-27 |
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| CN202010757881.7A Pending CN111829919A (en) | 2020-07-31 | 2020-07-31 | Slurry circulating pump bypass pipe density and pH value measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642273A (en) * | 2020-12-18 | 2021-04-13 | 阿拉尔市中泰纺织科技有限公司 | Incineration recovery system and process for converting low-concentration waste gas into high-concentration waste gas through degassing |
-
2020
- 2020-07-31 CN CN202010757881.7A patent/CN111829919A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112642273A (en) * | 2020-12-18 | 2021-04-13 | 阿拉尔市中泰纺织科技有限公司 | Incineration recovery system and process for converting low-concentration waste gas into high-concentration waste gas through degassing |
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