CN112557252A - Desulfurization slurry density measuring device and method - Google Patents
Desulfurization slurry density measuring device and method Download PDFInfo
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- CN112557252A CN112557252A CN202011462495.1A CN202011462495A CN112557252A CN 112557252 A CN112557252 A CN 112557252A CN 202011462495 A CN202011462495 A CN 202011462495A CN 112557252 A CN112557252 A CN 112557252A
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- 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
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
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Abstract
The invention relates to a desulfurization slurry density measuring device and a method, the device comprises a slurry inlet pipeline (1), a water inlet slurry discharge pipeline (2), a measuring cylinder (3), a slurry discharge valve (4), an overflow pipe (5) and a slurry collecting pool (6), wherein the slurry inlet pipeline (1) is formed by sequentially connecting a slurry inlet pipe connector I (11), a slurry inlet valve I (12), a slurry inlet pipe connector II (13) and a slurry inlet valve II (14) through connecting pipes, the water inlet slurry discharge pipeline (2) is formed by connecting a water inlet valve (21), a water inlet slurry discharge pipe connector (22) and a slurry discharge valve (23) through connecting pipes, the lower part of the measuring cylinder (3) is provided with a pressure transmitter (31), the overflow pipe (5) is provided with a flowmeter (51), the slurry discharge valve (4) is arranged at the bottom of the measuring cylinder (3), the upper end of the overflow pipe (5) is connected with the upper part of the measuring cylinder (3), the lower end of the slurry collecting tank is connected with the slurry collecting tank (6), and the slurry collecting tank is simple and novel in structure, high in detection accuracy and automatic and convenient to operate and maintain.
Description
Technical Field
The invention relates to the technical field of power plant desulfurization, in particular to a desulfurization slurry density measuring device and method.
Background
The density value of the desulfurization slurry in the desulfurization system of the power plant is one of important parameters for controlling the desulfurization effect. The desulfurization production process is the process that the sulfur dioxide in the gypsum slurry and the flue gas reacts in the desulfurization absorption tower, the desulfurization effect is good or bad, and the control is realized by controlling the density value of the gypsum slurry in the operation process. The density value of desulfurization thick liquid is controlling the emission of gypsum thick liquid in the absorption tower, keep the equilibrium of material in the absorption tower, if the density value is less than certain specific value, the absorption tower recirculation need be beaten back to the thick liquid, if the density value is higher than certain specific value, then beat to one-level dewatering system, if the density value of desulfurization thick liquid detects inaccurately, cause the desulfurization thick liquid to discharge easily and be difficult to control, especially detect the density value on the low side and under the higher condition of actual density value, can cause the thick liquid supersaturation degree on the high side, serious scale deposit phenomenon appears, therefore, the density value detection accuracy of desulfurization thick liquid seriously influences the desulfurization effect.
There are many measurement methods for measuring the density value of the desulfurized slurry in the power plant desulfurization system, but there are some deviations in the density measurement value due to various reasons on site, and there are some problems in use and maintenance. Therefore, how to provide a desulfurization slurry density measuring device and method with high detection accuracy and automatic and convenient operation and maintenance is a problem which needs to be solved urgently by those skilled in the art at present.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a desulfurization slurry density measuring device and method, which are simple and novel in structure, high in detection accuracy and automatic and convenient in operation and maintenance.
The technical scheme adopted by the invention is as follows: a desulfurization slurry density measuring device comprises a slurry inlet pipeline 1, a water inlet slurry discharge pipeline 2, a measuring cylinder 3, a slurry discharge valve 4, an overflow pipe 5 and a slurry collecting pool 6, wherein the slurry inlet pipeline 1 is formed by sequentially connecting a slurry inlet pipe joint I11, a slurry inlet valve I12, a slurry inlet pipe joint II 13 and a slurry inlet valve II 14 through connecting pipes, the water inlet slurry discharge pipeline 2 is formed by connecting a water inlet valve 21, a water inlet slurry discharge pipe joint 22 and a slurry discharge valve 23 through connecting pipes, the lower part of the measuring cylinder 3 is provided with a pressure transmitter 31, the overflow pipe 5 is provided with a flowmeter 51, the slurry inlet valve II 14 is connected with the lower part of the measuring cylinder 3 through a connecting pipe, the water inlet slurry discharge pipe joint 22 is connected with the slurry inlet pipe joint II 13 through a connecting pipe, the slurry discharge valve 23 is connected with the slurry collecting pool 6 through a connecting pipe, the slurry discharge valve 4 is arranged at the bottom of the measuring cylinder 3, the slurry discharge valve 4 is connected with the slurry collecting pool 6 through a connecting pipe, the upper end of the overflow pipe 5 is connected with the upper part of the measuring cylinder 3, and the lower end is connected with the slurry collecting tank 6.
The further improvement is that the measuring cylinder 3 is a hollow cylindrical component with upper and lower seals, and the material of the measuring cylinder is a stainless steel pipe or a plastic-lined seamless steel pipe.
The further improvement is that the angle between the connecting pipe of the pressure transmitter 31 and the measuring cylinder 3 is 30-60 degrees.
A desulfurization slurry density measurement method comprises the following steps:
step one, first slurry is discharged, a first slurry inlet valve 12 is opened, a second slurry outlet valve 23 is opened, a second slurry inlet valve 14 is closed, a water inlet valve 21 is closed, a slurry discharge valve 4 is closed, slurry enters from a first slurry inlet pipe connector 11 and is discharged into a slurry collecting pool 6 from the first slurry outlet valve 23;
step two, measuring the density of the slurry, wherein a first slurry inlet valve 12 is opened, a second slurry inlet valve 14 is opened, a water inlet valve 21 is closed, a slurry discharge valve 23 is closed, a slurry discharge valve 4 is closed, the slurry flows into a measuring cylinder 3 through a slurry inlet pipeline 1, when the slurry reaches a certain height in the measuring cylinder 3, the slurry overflows into a slurry collecting pool 6 through an overflow pipe 5, when a flowmeter 51 detects that the slurry flows out, the first slurry inlet valve 12 is closed, the slurry stops flowing in, the density value of the slurry in the measuring cylinder 3 is kept stand for a certain time, a pressure transmitter 31 detects a pressure value, the pressure transmitter calculates according to a formula, the slurry discharge valve 4 is opened, and the slurry in the measuring cylinder 3 is discharged into the slurry collecting pool 6;
and step three, washing and cleaning, wherein the water inlet valve 21 is opened, the pulp inlet valve II 14 is opened, the pulp inlet valve I12 is closed, the pulp discharge valve 23 is closed, the pulp discharge valve 4 is closed, washing water enters from the water inlet valve 21 and enters the measuring cylinder 3 through the pulp inlet valve II 14, the washing water overflows into the pulp collection pool 6 through the overflow pipe 5 when reaching a certain height in the measuring cylinder 3, when the flow meter 51 detects that the washing water flows out, the water inlet valve 21 is closed, the pulp inlet valve II 14 is closed, the pulp discharge valve 4 is opened, and the washing water in the measuring cylinder 3 is discharged into the pulp collection pool 6.
Compared with the prior art, the invention has the following beneficial effects:
the device is provided with a water inlet slurry discharge pipeline, head slurry can be discharged, washed and cleaned, the detection accuracy is improved, and the operation and maintenance are automatic and convenient;
and the flowmeter is arranged, so that the overflow of the slurry or the washing water can be detected in real time, the slurry or the washing water is guaranteed to reach a certain height in the measuring cylinder, the detection accuracy is improved, and the washing cleanliness is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
As shown in figure 1, a desulfurization slurry density measuring device comprises a slurry inlet pipeline 1, a water inlet slurry discharge pipeline 2, a measuring cylinder 3, a slurry discharge valve 4, an overflow pipe 5 and a slurry collecting pool 6, wherein the slurry inlet pipeline 1 is formed by sequentially connecting a slurry inlet pipe connector I11, a slurry inlet valve I12, a slurry inlet pipe connector II 13 and a slurry inlet valve II 14 through connecting pipes, the water inlet slurry discharge pipeline 2 is formed by connecting a water inlet valve 21, a water inlet slurry discharge pipe connector 22 and a slurry discharge valve 23 through connecting pipes, the measuring cylinder 3 is a hollow cylindrical member with an upper seal and a lower seal and is made of a stainless steel pipe or a plastic-lined seamless steel pipe, the lower part of the measuring cylinder 3 is provided with a pressure transmitter 31, the angle between the connecting pipe of the pressure transmitter 31 and the measuring cylinder 3 is 30-60 degrees, the overflow pipe 5 is provided with a flow meter 51, the slurry inlet valve II 14 is connected with the lower part of the measuring cylinder 3 through the connecting pipe, the water inlet slurry discharge pipe connector 22 is connected with the slurry inlet, the slurry discharging valve 23 is connected with the slurry collecting pool 6 through a connecting pipe, the slurry discharging valve 4 is arranged at the bottom of the measuring cylinder 3, the slurry discharging valve 4 is connected with the slurry collecting pool 6 through a connecting pipe, the upper end of the overflow pipe 5 is connected with the upper part of the measuring cylinder 3, and the lower end of the overflow pipe is connected with the slurry collecting pool 6.
This desulfurization thick liquid density measurement device is connected with the supply thick liquid pump recirculation pipeline through advancing thick liquid pipe connector 11, through inlet valve 21 and water service pump pipe connection.
The invention also provides a desulfurization slurry density measuring method, which comprises the following steps:
step one, first slurry is discharged, a first slurry inlet valve 12 is opened, a second slurry outlet valve 23 is opened, a second slurry inlet valve 14 is closed, a water inlet valve 21 is closed, a slurry discharge valve 4 is closed, slurry enters from a first slurry inlet pipe connector 11 and is discharged into a slurry collecting pool 6 from the first slurry outlet valve 23;
when the head slurry is discharged, the residual slurry remained in the slurry inlet pipeline can be discharged;
step two, measuring the density of the slurry, wherein a first slurry inlet valve 12 is opened, a second slurry inlet valve 14 is opened, a water inlet valve 21 is closed, a slurry discharge valve 23 is closed, a slurry discharge valve 4 is closed, the slurry flows into a measuring cylinder 3 through a slurry inlet pipeline 1, when the slurry reaches a certain height in the measuring cylinder 3, the slurry overflows into a slurry collecting pool 6 through an overflow pipe 5, when a flowmeter 51 detects that the slurry flows out, the first slurry inlet valve 12 is closed, the slurry stops flowing in, the density value of the slurry in the measuring cylinder 3 is kept stand for a certain time, a pressure transmitter 31 detects a pressure value, the pressure transmitter calculates according to a formula, the slurry discharge valve 4 is opened, and the slurry in the measuring cylinder 3 is discharged into the slurry collecting pool 6;
the calculation formula is as follows: rho is P/Hg, rho is the density value of the slurry, P is the pressure value detected by the pressure transmitter 31, H is the distance from the detection point of the pressure transmitter 31 to the overflow pipe orifice at the upper part of the measuring cylinder 3, and g is the gravity acceleration;
and step three, washing and cleaning, wherein the water inlet valve 21 is opened, the pulp inlet valve II 14 is opened, the pulp inlet valve I12 is closed, the pulp discharge valve 23 is closed, the pulp discharge valve 4 is closed, washing water enters from the water inlet valve 21 and enters the measuring cylinder 3 through the pulp inlet valve II 14, the washing water overflows into the pulp collection pool 6 through the overflow pipe 5 when reaching a certain height in the measuring cylinder 3, when the flow meter 51 detects that the washing water flows out, the water inlet valve 21 is closed, the pulp inlet valve II 14 is closed, the pulp discharge valve 4 is opened, and the washing water in the measuring cylinder 3 is discharged into the pulp collection pool 6.
Without being limited thereto, any changes or substitutions that are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. A desulfurization slurry density measuring device is characterized by comprising a slurry inlet pipeline (1), a water inlet slurry discharge pipeline (2), a measuring cylinder (3), a slurry discharge valve (4), an overflow pipe (5) and a slurry collecting pool (6), wherein the slurry inlet pipeline (1) is formed by sequentially connecting a slurry inlet pipe connector I (11), a slurry inlet valve I (12), a slurry inlet pipe connector II (13) and a slurry inlet valve II (14) through connecting pipes, the water inlet slurry discharge pipeline (2) is formed by connecting a water inlet valve (21), a water inlet slurry discharge pipe connector (22) and a slurry discharge valve (23) through connecting pipes, the lower part of the measuring cylinder (3) is provided with a pressure transmitter (31), the overflow pipe (5) is provided with a flow meter (51), the slurry inlet valve II (14) is connected with the lower part of the measuring cylinder (3) through a connecting pipe, the water inlet slurry discharge pipe connector (22) is connected with the slurry inlet pipe connector II (13) through a connecting pipe, arrange thick liquid valve (23) and be connected with thick liquid collecting pit (6) through the connecting pipe, let out thick liquid valve (4) and set up in the bottom of measuring a section of thick bamboo (3), let out thick liquid valve (4) and be connected with thick liquid collecting pit (6) through the connecting pipe, the upper end of overflow pipe (5) is connected with the upper portion of measuring a section of thick bamboo (3), the lower extreme is connected with thick liquid collecting pit (6).
2. The desulfurization slurry density measuring device according to claim 1, wherein the measuring cylinder (3) is a hollow cylindrical member with upper and lower seals, and is made of stainless steel pipe or plastic-lined seamless steel pipe.
3. The desulfurization slurry density measuring apparatus according to claim 1, wherein the angle between the connecting pipe of the pressure transmitter (31) and the measuring cylinder (3) is 30 ° to 60 °.
4. The measurement method of the desulfurization slurry density measurement device according to claim 1, characterized by comprising the following steps:
firstly, discharging the primary slurry, opening a slurry inlet valve I (12), opening a slurry discharge valve (23), closing a slurry inlet valve II (14), closing a water inlet valve (21), closing a slurry discharge valve (4), allowing the slurry to enter from a slurry inlet pipe connector I (11) and to be discharged into a slurry water collecting tank (6) from the slurry discharge valve (23);
step two, measuring the density of the slurry, wherein a first slurry inlet valve (12) is opened, a second slurry inlet valve (14) is opened, a water inlet valve (21) is closed, a slurry discharge valve (23) is closed, a slurry discharge valve (4) is closed, the slurry flows into a measuring cylinder (3) through a slurry inlet pipeline (1), the slurry overflows into a slurry collecting pool (6) through an overflow pipe (5) when reaching a certain height in the measuring cylinder (3), the first slurry inlet valve (12) is closed when a flowmeter (51) detects that the slurry flows out, the slurry stops flowing in, the slurry in the measuring cylinder (3) is kept still for a certain time, a pressure transmitter (31) detects the pressure value, the density value is calculated according to a formula, the slurry discharge valve (4) is opened, and the slurry in the measuring cylinder (3) is discharged into the slurry collecting pool (6);
and step three, washing and cleaning, wherein a water inlet valve (21) is opened, a pulp inlet valve II (14) is opened, a pulp inlet valve I (12) is closed, a pulp discharge valve (23) is closed, a pulp discharge valve (4) is closed, washing water enters from the water inlet valve (21) and enters into the measuring cylinder (3) through the pulp inlet valve II (14), the washing water overflows into the pulp collection pool (6) through an overflow pipe (5) when reaching a certain height in the measuring cylinder (3), when the flow meter (51) detects that washing water flows out, the water inlet valve (21) is closed, the pulp inlet valve II (14) is closed, the pulp discharge valve (4) is opened, and the washing water in the measuring cylinder (3) is discharged into the pulp collection pool (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011462495.1A CN112557252A (en) | 2020-12-09 | 2020-12-09 | Desulfurization slurry density measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011462495.1A CN112557252A (en) | 2020-12-09 | 2020-12-09 | Desulfurization slurry density measuring device and method |
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| CN112557252A true CN112557252A (en) | 2021-03-26 |
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| CN202011462495.1A Pending CN112557252A (en) | 2020-12-09 | 2020-12-09 | Desulfurization slurry density measuring device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552019A (en) * | 2021-05-25 | 2021-10-26 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552019A (en) * | 2021-05-25 | 2021-10-26 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
| CN113552019B (en) * | 2021-05-25 | 2024-03-22 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
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