CN214310022U - Accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter - Google Patents
Accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter Download PDFInfo
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- CN214310022U CN214310022U CN202022145980.8U CN202022145980U CN214310022U CN 214310022 U CN214310022 U CN 214310022U CN 202022145980 U CN202022145980 U CN 202022145980U CN 214310022 U CN214310022 U CN 214310022U
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Abstract
The utility model provides an accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter. In the measuring equipment, slurry outlets of two circulating pumps are connected with two inlet pipes, and two inlet pipe switch valves are installed on the inlet pipes. The inlet pipe switch valve is connected with the return pipe, the return valve and the slurry pipe electric switch valve; the outlet of the measuring cylinder A is connected with a return pipe, the return pipe is provided with a return valve which is connected with the absorption tower, and the side wall of the measuring cylinder A is provided with an interface of a PH meter. The inlet pipe switch valve is also connected with the slurry pipe, the electric switch valve, the electric blowdown valve, the overflow pipe and the overflow port; the distance between the two sampling ports of the measuring cylinder B is not less than 0.5 m; the outlet and the bottom of the measuring cylinder B are connected with an overflow pipe. The device belongs to an independent measuring device, and the installation position can be freely changed according to the requirements of the field situation; the density of the slurry in the flow state can be measured, no slurry dead zone exists, and the measurement precision is high; meanwhile, the device has an online washing function, and can effectively avoid the occurrence of scaling on the surface of the instrument probe.
Description
Technical Field
The utility model relates to a thick liquid density, PH measure technical field, concretely relates to accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter.
Background
At present, for a wet desulphurization system commonly used in a thermal power plant, a wet limestone-gypsum method flue gas desulphurization process is generally adopted for desulphurization, and the slurry density and the pH value in a desulphurization tower are important parameters for ensuring the normal operation of the desulphurization system. But at the same time has not a few disadvantages.
Slurry in the desulfurizing tower has viscosity and corrosivity, can cause jam and corruption to power plant density measuring device and PH value measuring device, causes most power plant densimeter and PH meter on-line measuring device inaccurate easily, influences desulfurization efficiency, more relates to whether flue gas emission reaches the environmental protection requirement.
In the process of measuring the density of the desulfurization slurry, the technical process of a wet desulfurization system is complicated, the working environment of measuring equipment is severe, and the components and the characteristics of the slurry are complex, so that a plurality of problems and difficulties are caused in the measurement of PH and density. Such as: (1) the concentration of chloride ions in the slurry is higher, and the corrosivity is stronger; (2) the mass fraction of solid substances in the slurry is higher, generally controlled between 15 and 20 percent, and the abrasiveness is stronger; (3) the slurry has high mass fraction of solid substances and poor flowing structure, and is easy to cause solid particle deposition and pipeline blockage.
Therefore, the slurry of the desulfurization system has high solid content, is easy to corrode and wear, blocks a measuring pipe of an instrument and the like, and the measurement accuracy of the PH and densitometer is greatly limited.
Disclosure of Invention
The utility model aims at solving the defects existing in the prior art and providing an accurate measuring system and an accurate measuring device for a wet desulphurization slurry density and PH meter.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a system for accurately measuring the density and PH value of wet desulphurization slurry comprises a measuring device and a control device.
Among the measuring equipment, two inlet tubes are two inlet tubes after the thick liquid export of two circulating pumps, have installed two inlet tube ooff valves on the inlet tube, and thick liquid pipe connection measuring cylinder A and measuring cylinder B realize two kinds of measurement schemes, the measuring cylinder A that sets up adopts the parallel arrangement with measuring cylinder B among the sample pipeline.
Preferably, the inlet pipe switch valve is connected with the return pipe, the return valve and the slurry pipe electric switch valve; the outlet of the measuring cylinder A is connected with a return pipe, the return pipe is provided with a return valve which is connected with the absorption tower, and the side wall of the measuring cylinder A is provided with an interface of a PH meter. The flow rate of the slurry in the measuring cylinder A is lower than 0.5 m/s; the included angle between the PH meter interface and the side wall of the measuring tube A is 45 degrees; therefore, the phenomenon that the slurry overflows to a pit can be avoided, the pH value of the slurry flowing slowly through the measuring cylinder can be accurately measured through the pH meter, and the slurry flows back to the absorption tower after detection.
Preferably, the inlet pipe switch valve is connected with the slurry pipe, the electric switch valve, the electric blowdown valve, the overflow pipe and the overflow port; the distance between the two sampling ports of the measuring cylinder B is not less than 0.5 m; the outlet and the bottom of the measuring cylinder are connected with an overflow pipe; through the electric switch valve, the slurry passes through the measuring cylinder B and the densimeter, so that the slurry in the density measuring cylinder B is measured by a differential pressure method after being in a stable state, and the density of the slurry is obtained through the densimeter.
Preferably, the process water pipe and the flushing water valve in the flushing pipeline are connected with the slurry pipe, the electric switch valve, the electric blowdown valve, the overflow pipe and the overflow port in the slurry pipeline.
Preferably, the control cabinet is connected with the host; the control cabinet is respectively connected with the electric switch valve, the flushing water valve, the differential pressure transmitter, the PH meter and the electric blowdown valve; and the control cabinet adopts a DCS control cabinet control system.
The working process is as follows: opening an inlet pipe switch valve, enabling the slurry in the desulfurization tower to enter a slurry pipeline through an outlet pipeline of a circulating pump, and at the moment, opening an electric switch valve and closing an electric blowdown valve and a flushing water valve; when the slurry flows out through the overflow port, the electric switch valve is closed, and the sampling process is finished; measuring the pH value of the slurry by a pH meter, directly reading the pH value of the slurry by the pH meter, and calculating the density of the slurry by reading of a densimeter on 2 differential pressure transmitters and the height of a sampling port; after the measurement is finished, the electric blow-down valve is opened to discharge the slurry, the flushing valve is opened, the measurement system is flushed by cleaning water, and finally the flushing water valve and the electric blow-down valve are closed in sequence to finish the cleaning of the measurement system.
Has the advantages that: the utility model provides a desulfurizing tower thick liquid density measurement system, the device can prevent effectively that original device from measuring the emergence of inaccurate, the easy scale deposit condition, operation that can be stable for a long time, and measure accurately. Engineering practice shows that the device can accurately measure the density of the slurry outlet area, and the slurry discharge time is accurately controlled according to the value of the on-line PH, so that the stability and the reliability of the operation of the desulfurizing tower system are improved. Because the device belongs to an independent measuring device, the installation position can be freely changed according to the requirements of the field situation; the density of the slurry in the flow state can be measured, no slurry dead zone exists, and the measurement precision is high; meanwhile, the device has an online washing function, and can effectively avoid the occurrence of scaling on the surface of the instrument probe.
Drawings
FIG. 1 is a schematic general view of a system for accurately measuring the density and pH of a wet desulfurization slurry according to the present invention.
Fig. 2 is a schematic right half diagram of a system for accurately measuring the density and PH of a wet desulfurization slurry according to the present invention.
Fig. 3 is a schematic left half-section diagram of an accurate measurement system for wet desulphurization slurry density and PH meter of the present invention.
The designations in the drawings have the following meanings: 1. the device comprises a return pipe, 2, a return valve, 3, a measuring cylinder A, 4, a PH meter, 5, a measuring cylinder A sampling port, 6, an inlet pipe switch valve, 7, a slurry pipe, 8, an electric switch valve, 9, a process water pipe, 10, a flushing water valve, 11, an electric blowdown valve, 12, an overflow pipe, 13, a diaphragm valve, 14, a densimeter, 15, a differential pressure transmitter, 16, an overflow port, 17, measuring cylinders B, 18, a control cabinet, 19, a host, 20 and a differential pressure transmitter interface.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2 and fig. 3, a system for accurately measuring the density and PH of a wet desulfurization slurry includes a measuring device and a control device. The measuring equipment comprises a slurry pipeline, a sampling pipeline, a flushing pipeline, a PH meter 4, a measuring cylinder A, a densimeter 14, a differential pressure transmitter 15 and a measuring cylinder B. The control apparatus includes: a control cabinet 18 and a host 19 connected to the control cabinet.
The slurry pipeline comprises a return pipe 1, a return valve 2, an inlet pipe switch valve 6, a slurry pipe 7, an electric switch valve 8, an electric blowdown valve 11, an overflow pipe 12 and an overflow port 16; the reflux valve 2 is arranged on the reflux pipe 1, so that the installation and the maintenance are convenient. An inlet pipe switch valve 6, an electric switch valve 8 and an electric blowdown valve 11 are arranged on the slurry pipe 7, and an overflow pipe 12 is arranged on the measuring cylinder B, so that the measurement control is facilitated.
The sampling pipeline comprises a measuring cylinder A, a measuring cylinder A sampling port 5, a differential pressure transmitter interface 20, a measuring cylinder B and a diaphragm valve 13. The PH meter 4 is arranged on a sampling port 5 of the measuring cylinder A, and the differential pressure transmitter 15 is arranged on a differential pressure transmitter interface 20, so that the PH and the density of the slurry can be measured stably.
The flushing pipeline comprises a process water pipe 9 and a flushing water valve 10. The process water flush frequency is controlled by the flush water valve 10.
And a host 19 connected with the control cabinet receives the states of the valves and signals of the differential pressure transmitter through the control cabinet 18, records and displays the density value and the PH value of the slurry, and sends a valve opening and closing instruction.
The accurate measurement system for the wet desulphurization slurry density and pH meter comprises the following working processes: opening an inlet pipe switch valve 6, a reflux valve 2 and an electric switch valve 8, allowing the slurry to enter a measuring cylinder A and a measuring cylinder B through a slurry pipe 7, closing the electric switch valve 8 when the slurry flows out of an overflow port 16, measuring by using a differential pressure method after a slurry sample of the measuring cylinder B is static and stable, and calculating to obtain the slurry density; the PH meter reads directly the slurry passing slowly through the measuring cylinder a to obtain the real time data PH. And after the measurement is finished, opening the electric blow-down valve 11, emptying the slurry, opening the flushing water valve 10, closing the electric blow-down valve 11, and opening the electric blow-down valve 11 to discharge flushing water when process water flows out of the overflow pipe 12, so as to finish flushing the measurement system and wait for next density measurement.
The present invention has been described in relation to the above embodiments, which are only examples for carrying out the invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (5)
1. The utility model provides an accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter which characterized in that: comprises a measuring device and a control device; the measuring equipment comprises a slurry pipeline, a sampling pipeline and a flushing pipeline; the slurry pipeline, the sampling pipeline and the flushing pipeline are connected through pipelines; the control equipment comprises a control cabinet (18) and a host (19); the measuring equipment is connected with the control equipment through a line; the sampling pipeline comprises a measuring cylinder A (3), a measuring cylinder A sampling port (5) and a measuring cylinder B (17);
the sampling pipeline is provided with a diaphragm valve (13) and a differential pressure transmitter interface (20);
a measuring cylinder A (3) in the sampling pipeline is connected with a PH meter (4) and a sampling port (5) of the measuring cylinder A;
the PH meter (4) is arranged on a sampling port (5) of the measuring cylinder A (3);
the included angle formed by the interface of the PH meter (4) and the side wall of the measuring cylinder A (3) is 45 degrees;
a diaphragm valve (13), a densimeter (14), a differential pressure transmitter (15) and a differential pressure transmitter interface (20) are arranged in the sampling pipeline and are respectively connected with a measuring cylinder B (17);
the differential pressure transmitter (15) is respectively arranged on two sampling ports of the measuring cylinder B (17);
an outlet above the measuring cylinder A (3) is connected with an absorption tower;
an overflow port (16) at the upper end of the measuring cylinder B (17) and the bottom of the measuring cylinder B are connected with an overflow pipe (12);
the bottom of the overflow pipe (12) is connected with an electric blowdown valve (11);
the flow rate of the slurry in the measuring cylinder A (3) is lower than 0.5 m/s;
the distance between the two sampling ports of the measuring cylinder B (17) is not less than 0.5 m;
a measuring cylinder A (3) and a measuring cylinder B (17) which are arranged in the sampling pipeline are arranged in parallel;
the pipes at the lower ends of the measuring cylinder A (3) and the measuring cylinder B (17) are converged, and the discharge is sent to a trench.
2. The system of claim 1, wherein the system comprises: the slurry pipeline comprises a return pipe (1), a return valve (2), an inlet pipe switch valve (6), a slurry pipe (7), an electric switch valve (8), an electric blowdown valve (11), an overflow pipe (12) and an overflow port (16);
a slurry pipe (7) is arranged in the slurry pipeline and is respectively connected with the two circulating pump outlets II and III through pipelines;
the inlet pipe switch valve (6) is connected with the return pipe (1), the return valve (2) and the electric switch valve (8) of the slurry pipe (7) through pipelines;
the inlet pipe switch valve (6) is connected with the slurry pipe (7), the electric switch valve (8), the electric blowdown valve (11), the overflow pipe (12) and the overflow port (16) through pipelines.
3. The system of claim 2, wherein the system comprises: the reflux valve (2) is arranged on the reflux pipe (1);
the inlet pipe switch valve (6), the electric switch valve (8) and the electric blowdown valve (11) are arranged on the slurry pipe (7);
the overflow pipe (12) is arranged on the measuring cylinder B (17) to facilitate measurement and control.
4. The system of claim 1, wherein the system comprises:
the flushing pipeline comprises a process water pipe (9) and a flushing water valve (10);
and a process water pipe (9) and a flushing water valve (10) in the flushing pipeline are connected with a slurry pipe (7), an electric switch valve (8), an electric blowdown valve (11), an overflow pipe (12) and an overflow port (16) in the slurry pipeline through pipelines.
5. The system of claim 2, wherein the system comprises:
the control cabinet (18) is connected with a host (19);
the control cabinet is respectively connected with an electric switch valve (8), a flushing water valve (10), a differential pressure transmitter, a PH meter (4) and an electric blowdown valve (11);
the control cabinet (18) is controlled by a DCS control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022145980.8U CN214310022U (en) | 2020-09-27 | 2020-09-27 | Accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022145980.8U CN214310022U (en) | 2020-09-27 | 2020-09-27 | Accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter |
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| Publication Number | Publication Date |
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| CN214310022U true CN214310022U (en) | 2021-09-28 |
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| CN202022145980.8U Active CN214310022U (en) | 2020-09-27 | 2020-09-27 | Accurate measurement system of wet flue gas desulfurization thick liquid density and PH meter |
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| CN (1) | CN214310022U (en) |
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Address after: 224051 environmental protection Avenue innovation center, environmental protection science and Technology City, Tinghu District, Yancheng City, Jiangsu Province Patentee after: Jiangsu Kunlun Internet Technology Co.,Ltd. Address before: 224051 environmental protection Avenue innovation center, environmental protection science and Technology City, Tinghu District, Yancheng City, Jiangsu Province Patentee before: Kunyue Internet Environmental Technology (Jiangsu) Co.,Ltd. |
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