A comprehensive device, method and application for measuring slurry density and pH value of a limestone-gypsum flue gas desulfurization tower

Abstract

The application discloses a comprehensive device for measuring slurry density and pH value of a limestone-gypsum flue gas desulfurization tower, which can be connected with the flue gas desulfurization tower, and a slurry section is arranged in the flue gas desulfurization tower; the device comprises a slurry density measuring device, a slurry flow circulation main pipeline, a pH meter flushing isolation valve, a pH meter flushing valve, a pH meter, a circulating pump inlet main pipeline communication valve and a slurry flow circulation main pipeline vent valve, and the slurry density measuring device is connected with the slurry flow circulation main pipeline. The device has the advantages that the gas in the tee joint of the pressure transmitter or the differential pressure transmitter is eliminated, the calculated slurry density is closer to the actual density, the detection precision is improved, the electric power and the energy are saved, and the labor intensity of the maintenance personnel is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of environmental protection equipment, and particularly relates to a comprehensive device, method and application for measuring slurry density and pH value of a limestone-gypsum flue gas desulfurization tower. BACKGROUND

[0002] At present, the slurry density measuring equipment of the limestone-gypsum flue gas desulfurization tower mainly comprises two pressure transmitters or one differential pressure transmitter arranged on the side wall of the absorption tower or the outlet pipeline of the circulating pump, and then the density is calculated through a formula. Because the pipeline matched with the differential pressure transmitter gradually accumulates air, the data of the pressure transmitter or the differential pressure transmitter gradually becomes distorted, so that the calculated density has a large deviation from the actual density.

[0003] In addition, the pH value measuring equipment of the limestone-gypsum flue gas desulfurization tower mainly comprises a drainage pipe arranged on the wall of the desulfurization tower, a slurry tank or a slurry pipe into which the slurry in the desulfurization tower is drained, a pH meter connecting hole arranged on the top cover of the slurry tank or the side wall of the slurry pipe, a pH meter electrode extended into the slurry tank or the slurry pipe, and a pit pump arranged in the pit. The slurry in the desulfurization tower is drained from the drainage pipe, flows through the slurry tank or the slurry pipe, and then flows into the pit of the desulfurization tower by itself, and is pumped back to the absorption tower by the pit pump. The pH meter electrode contacts the slurry flowing through the slurry tank or the slurry pipe to measure the pH value of the slurry in the desulfurization tower. This method for measuring the pH value needs to control the amount of the slurry flowing through the slurry tank or the slurry pipe. If the amount of the slurry is too small, the slurry flowing through the slurry tank or the slurry pipe will be deposited after flowing for a period of time, thereby causing blockage and flow interruption, and resulting in inaccurate pH value measurement. If the amount of the slurry is too large, the flow rate of the corresponding pit pump will be too large, the power of the pit pump motor will be large, and the power consumption will be increased, thereby being not energy-saving.

[0004] Therefore, the slurry density and pH value measuring equipment of the limestone-gypsum flue gas desulfurization tower in the prior art cannot completely meet the use requirements, and one or more new related equipment are urgently needed.

[0005] Through retrieval, no patent disclosure document related to the present patent application has been found. SUMMARY

[0006] The present application aims at overcoming the deficiencies in the prior art, and provides a comprehensive device, method and application for measuring slurry density and pH value of a limestone-gypsum flue gas desulfurization tower.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0008] The utility model provides a kind of limestone-gypsum method flue gas desulfurization tower slurry density and pH value measurement integrated device, the integrated device can be connected with flue gas desulfurization tower arrangement, slurry section is provided in flue gas desulfurization tower, the device includes slurry density measuring device, slurry flow main pipeline, pH meter flush isolation valve, pH meter flush valve, pH meter, circulating pump inlet main pipeline intercommunication valve and slurry flow main pipeline vent valve, slurry density measuring device is connected with slurry flow main pipeline arrangement;

[0009] The slurry flow main pipeline includes vertically main pipeline and horizontal main pipeline being connected and arranged, vertically main pipeline is arranged along vertical direction, and horizontal main pipeline is arranged along horizontal direction;The top of vertically main pipeline is arranged as opening, and the top opening of vertically main pipeline is connected with atmosphere, the bottom of vertically main pipeline is connected with horizontal one end input end of horizontal main pipeline, and horizontal other end output end of horizontal main pipeline can be connected with ditch;

[0010] The slurry density measuring device includes pressure transmitter or differential pressure transmitter, pressure transmitter or differential pressure transmitter isolation valve, pressure transmitter or differential pressure transmitter slurry valve, pressure transmitter or differential pressure transmitter connection tee, the pressure transmitter or differential pressure transmitter is connected with the first end of pressure transmitter or differential pressure transmitter connection tee and is arranged closely, the second end of pressure transmitter or differential pressure transmitter connection tee is connected with the slurry section of flue gas desulfurization tower by first pipeline and is arranged closely, pressure transmitter or differential pressure transmitter isolation valve is arranged closely on first pipeline, and the slurry in the slurry section of flue gas desulfurization tower can be connected with pressure transmitter or differential pressure transmitter connection tee by first pipeline and pressure transmitter or differential pressure transmitter isolation valve, the third end of pressure transmitter or differential pressure transmitter connection tee is connected with vertically main pipeline by second pipeline and is arranged closely, and pressure transmitter or differential pressure transmitter slurry valve is arranged closely on second pipeline;pH meter flush isolation valve is arranged closely on the bottom of vertically main pipeline close to horizontal main pipeline;

[0011] The top opening of vertically main pipeline is arranged above the upper surface of slurry in the slurry section of flue gas desulfurization tower, and the connection of second pipeline and vertically main pipeline is arranged below the upper surface of slurry in the slurry section of flue gas desulfurization tower;

[0012] The multiple connecting pipes are arranged on the horizontal main pipe in sequence and closely connected, the pH meter flushing valve, the pH meter, and the circulating pump inlet main pipe communication valve are arranged on the connecting pipes in sequence and closely connected, the pH meter flushing valve is arranged close to the pH meter flushing partition valve, the pH meter flushing valve is also arranged in close connection with the flushing water pipe, the horizontal main pipe is arranged in close connection with the suction inlet of the inlet main pipe of the circulating pump through the circulating pump inlet main pipe communication valve, and the slurry flow-through main pipe vent valve is arranged in close connection on the horizontal main pipe between the circulating pump inlet main pipe communication valve and the horizontal other end output end of the horizontal main pipe.

[0013] Further, the slurry density measuring device is arranged in one or more groups in the vertical direction.

[0014] Further, the material of the slurry flow-through main pipe is an inner rubber steel pipe, 316L or glass steel.

[0015] Further, the material of the pressure transmitter or differential pressure transmitter connecting tee joint is an inner rubber steel pipe, 316L or glass steel.

[0016] The application of the limestone-gypsum flue gas desulfurization tower slurry density and pH value measuring comprehensive device as described above in the measurement of the slurry density and pH value of the desulfurization tower.

[0017] The use method of the limestone-gypsum flue gas desulfurization tower slurry density and pH value measuring comprehensive device as described above comprises the following steps:

[0018] After the slurry in the desulfurization tower passes through the first pipe and the second end of the pressure transmitter or differential pressure transmitter connecting tee joint, the density of the slurry in the desulfurization tower is measured by the pressure transmitter or differential pressure transmitter, then the slurry enters the slurry flow-through main pipe, and then the slurry flows through the pH meter, the pH meter measures the pH value of the slurry in the desulfurization tower, then the slurry enters the suction inlet of the inlet main pipe of the circulating pump, and finally the slurry is injected into the desulfurization tower after passing through the circulating pump.

[0019] The advantages and effects obtained by the present application are as follows:

[0020] 1. The limestone-gypsum flue gas desulfurization tower slurry density and pH value measuring comprehensive device solves the problems of inaccurate slurry density measurement and pH value measurement and pit pump energy consumption, and can be applied in the measurement of the slurry density and pH value of the limestone-gypsum desulfurization tower.

[0021] 2, The pulp density calculated by the device is closer to the true density, and the inaccurate pulp density in the prior art is because air enters the tee joint connected with the pressure transmitter or differential pressure transmitter, the amount of air entering the tee joint connected with the pressure transmitter or differential pressure transmitter at different heights is different, and the calculated pulp density is distorted.

[0022] 3, When the device is used, the pulp no longer enters the pit, and the pit pump is no longer needed to pump the pulp back to the desulfurization tower, so the pit pump will no longer need to consider the pH meter self-flowing pulp flow when selecting the pit pump, the pit pump motor power is smaller, the pump procurement cost is reduced, and it is more energy-saving.

[0023] 3, The device connects the tee joint connected with the pressure transmitter or differential pressure transmitter with the pulp flow main pipeline, so that the pulp before the pressure transmitter or differential pressure transmitter is in a flowing state and no longer accumulates air.

[0024] 5, The pulp flow main pipeline of the device is connected with the inlet main pipe of the circulating pump, the pulp enters the circulating pump, and the pulp no longer enters the pit, reducing the flow of the pit pump. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural connection schematic diagram of the device. DETAILED DESCRIPTION

[0026] The application will be further described in detail below by combining with specific examples, the following examples are only descriptive and not limiting, and cannot limit the protection scope of the application.

[0027] The raw materials used in the application are conventional commercially available products, unless otherwise specified, the methods used in the application are conventional methods in the art, unless otherwise specified, and the mass of each substance used in the application is a conventional use mass. Structures, connection relationships and the like not described in detail in the application can be understood as conventional technical means in the art.

[0028] A comprehensive device for measuring the pulp density and pH value of a limestone-gypsum flue gas desulfurization tower, as shown in Figure 1 The device can be connected and arranged with the flue gas desulfurization tower 16, the pulp section (not shown in the figure) is arranged in the flue gas desulfurization tower, the device comprises a pulp density measuring device, a pulp flow main pipeline 5, a pH meter flushing isolation valve 6, a pH meter flushing valve 7, a pH meter 8, a circulating pump inlet main pipeline communication valve 9 and a pulp flow main pipeline vent valve 10, and the pulp density measuring device is connected and arranged with the pulp flow main pipeline;

[0029] The pulp liquid flow main pipeline comprises a vertical main pipeline 51 and a horizontal main pipeline 52 which are connected in communication, the vertical main pipeline is arranged in the vertical direction, and the horizontal main pipeline is arranged in the horizontal direction; the top of the vertical main pipeline is arranged in an open manner, the top opening of the vertical main pipeline is arranged in communication with the atmosphere, the bottom of the vertical main pipeline is connected with a horizontal one end input end 54 of the horizontal main pipeline, and a horizontal other end output end 55 of the horizontal main pipeline can be connected with the trench 17;

[0030] The pulp liquid density measuring device comprises a pressure transmitter or differential pressure transmitter 1, a pressure transmitter or differential pressure transmitter cutoff valve 2, a pressure transmitter or differential pressure transmitter pulp discharge valve 3, and a pressure transmitter or differential pressure transmitter connecting tee 4, the pressure transmitter or differential pressure transmitter is connected with the first end of the pressure transmitter or differential pressure transmitter connecting tee in a close manner, the second end of the pressure transmitter or differential pressure transmitter connecting tee is connected with the pulp liquid section of the flue gas desulfurization tower in a close manner through a first pipeline 11, the pressure transmitter or differential pressure transmitter cutoff valve is connected with the first pipeline in a close manner, the pulp liquid in the pulp liquid section of the flue gas desulfurization tower can be connected with the pressure transmitter or differential pressure transmitter connecting tee through the first pipeline and the pressure transmitter or differential pressure transmitter cutoff valve, the third end of the pressure transmitter or differential pressure transmitter connecting tee is connected with the vertical main pipeline in a close manner through a second pipeline 13, and the pressure transmitter or differential pressure transmitter pulp discharge valve is connected with the second pipeline in a close manner; a pH meter flushing cutoff valve is connected with the bottom of the vertical main pipeline close to the horizontal main pipeline in a close manner, when the pH meter needs to be flushed, the pH meter flushing cutoff valve can cut off the pipeline vertical main pipeline, so that the pulp liquid in the tower cannot enter the horizontal main pipeline;

[0031] The top opening of the vertical main pipeline is arranged above the upper surface of the pulp liquid in the pulp liquid section of the flue gas desulfurization tower, and the connection between the second pipeline and the vertical main pipeline is arranged below the upper surface of the pulp liquid in the pulp liquid section of the flue gas desulfurization tower, so that the pulp liquid in the pulp liquid section of the flue gas desulfurization tower can enter the pulp liquid density measuring device and flow back into the vertical main pipeline from the second pipeline, and cannot overflow from the top opening of the vertical main pipeline;

[0032] The horizontal main pipeline is sequentially and closely connected with a plurality of connecting pipelines 53, a pH meter flushing valve, a pH meter, and a circulating pump inlet main pipeline communication valve are sequentially and closely arranged on the connecting pipelines, the pH meter flushing valve is arranged close to the pH meter flushing partition valve, and the pH meter flushing valve is also closely connected with the flushing water pipe 14, the horizontal main pipeline is closely connected with the suction inlet 12 of the inlet main pipeline 15 of the circulating pump (not shown in the figure) through the circulating pump inlet main pipeline communication valve.

[0033] In the embodiment, one or more than two groups of slurry density measuring devices are arranged in the vertical direction, and more than two groups can make the slurry density value more stable and prevent the density from being distorted due to problems in the meter.

[0034] In the embodiment, the material of the slurry flow-through main pipeline is an inner rubber steel pipe, 316L, or glass steel, and the three pipelines have excellent corrosion resistance and are most common on the market and have a suitable price.

[0035] The material of the pressure transmitter or differential pressure transmitter connecting tee is an inner rubber steel pipe, 316L, or glass steel, and the three pipelines have excellent corrosion resistance and are most common on the market and have a suitable price.

[0036] The working principle and use method of the comprehensive device for measuring the slurry density and pH value of a limestone-gypsum flue gas desulfurization tower can be as follows:

[0037] The slurry in the desulfurization tower passes through the first pipeline and the second end of the pressure transmitter or differential pressure transmitter connecting tee, and then the density of the slurry in the desulfurization tower is measured by the pressure transmitter or differential pressure transmitter, and then the slurry enters the slurry flow-through main pipeline, and then the slurry flows through the pH meter, the pH meter measures the pH value of the slurry in the desulfurization tower, and then the slurry enters the suction inlet of the inlet main pipeline of the circulating pump, and the slurry is finally injected into the desulfurization tower after passing through the circulating pump.

[0038] The slurry flow-through main pipeline vent valve is used when the slurry in the pipeline needs to be vented during maintenance or replacement of the pH meter, and its function is to vent the slurry in the pipeline.

[0039] Because the pH meter measures the pH value of the slurry and needs to be cleaned with water regularly due to long-term contact with the slurry, the pH meter flushing valve functions to flush the pH meter.

[0040] The horizontal other end output of the horizontal main pipeline is connected with a ground ditch, which is used to collect the slurry when the emptying valve opens the emptying pipeline.

[0041] The device has the advantages of eliminating the gas in the tee connected with the pressure transmitter or the differential pressure transmitter, making the calculated slurry density more close to the actual density, improving the detection precision, saving the electric power and energy, and reducing the labor intensity of the maintenance personnel.

[0042] Although the embodiments of the present application are disclosed for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, and therefore the scope of the present application is not limited to the disclosed content of the embodiments.

Claims

1. An integrated device for measuring slurry density and pH in a limestone-gypsum flue gas desulfurization tower, characterized in that: The integrated device can be connected with a flue gas desulfurization tower, the flue gas desulfurization tower is internally provided with a slurry section, and the device comprises a slurry density measuring device, a slurry flow main pipeline, a pH meter flushing isolation valve, a pH meter flushing valve, a pH meter, a circulating pump inlet main pipeline communication valve and a slurry flow main pipeline vent valve, and the slurry density measuring device is connected with the slurry flow main pipeline; The slurry flow main pipeline comprises a vertical main pipeline and a horizontal main pipeline which are connected in communication, the vertical main pipeline is arranged along a vertical direction, and the horizontal main pipeline is arranged along a horizontal direction; the top of the vertical main pipeline is open, the top of the vertical main pipeline is communicated with the atmosphere, the bottom of the vertical main pipeline is connected with a horizontal one end input end of the horizontal main pipeline, and the horizontal other end output end of the horizontal main pipeline can be connected with a trench; The slurry density measuring device comprises a pressure transmitter or differential pressure transmitter, a pressure transmitter or differential pressure transmitter isolation valve, a pressure transmitter or differential pressure transmitter slurry discharge valve and a pressure transmitter or differential pressure transmitter connecting tee, the pressure transmitter or differential pressure transmitter is connected with the first end of the pressure transmitter or differential pressure transmitter connecting tee, the second end of the pressure transmitter or differential pressure transmitter connecting tee is connected with the slurry section of the flue gas desulfurization tower through a first pipeline, the pressure transmitter or differential pressure transmitter isolation valve is connected with the first pipeline, the slurry in the slurry section of the flue gas desulfurization tower is connected with the pressure transmitter or differential pressure transmitter connecting tee through the first pipeline and the pressure transmitter or differential pressure transmitter isolation valve, the third end of the pressure transmitter or differential pressure transmitter connecting tee is connected with the vertical main pipeline through a second pipeline, the pressure transmitter or differential pressure transmitter slurry discharge valve is connected with the second pipeline, and the pH meter flushing isolation valve is connected with the bottom of the vertical main pipeline close to the horizontal main pipeline; The top opening of the vertical main pipeline is arranged above the upper surface of the slurry in the slurry section of the flue gas desulfurization tower, and the connection between the second pipeline and the vertical main pipeline is arranged below the upper surface of the slurry in the slurry section of the flue gas desulfurization tower; A plurality of connecting pipelines are sequentially and closely connected with the horizontal main pipeline, the pH meter flushing valve, the pH meter, the circulating pump inlet main pipeline communication valve are sequentially and closely arranged on the connecting pipelines, the pH meter flushing valve is arranged close to the pH meter flushing isolation valve, the pH meter flushing valve is also connected with a flushing water pipe, the horizontal main pipeline is connected with the suction inlet of the inlet main pipeline of the circulating pump through the circulating pump inlet main pipeline communication valve, and the slurry flow main pipeline vent valve is connected with the horizontal main pipeline between the circulating pump inlet main pipeline communication valve and the horizontal other end output end of the horizontal main pipeline; The slurry density measuring device is arranged in one group or two groups or more along the vertical direction; The material of the slurry flow main pipeline is an inner lining rubber steel pipe, 316L or glass steel.

2. The integrated device for measuring slurry density and pH in a limestone-gypsum FGD tower according to claim 1, characterized in that: The material of the pressure transmitter or differential pressure transmitter connecting tee is an inner lining rubber steel pipe, 316L or glass steel.

3. The limestone-gypsum flue gas desulfurization tower slurry density and pH value measurement integrated device of claim 1 or 2 in the desulfurization tower slurry density and pH value measurement.

4. A method of using the integrated device for measuring slurry density and pH in a limestone-gypsum FGD tower according to claim 1 or 2, characterized in that: Comprising the following steps: The slurry in the desulfurization tower is connected to the second end of the tee joint through the first pipeline and the pressure transmitter or the differential pressure transmitter, the density of the slurry in the desulfurization tower is measured by the pressure transmitter or the differential pressure transmitter, then the slurry enters the slurry flow main pipeline, the slurry flows through the pH meter, the pH meter measures the pH value of the slurry in the desulfurization tower, then the slurry enters the suction inlet of the inlet main pipeline of the circulating pump, and the slurry is finally injected into the desulfurization tower after passing through the circulating pump.

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