Automatic filtering and cleaning device for sulfuric acid circulating tank

Abstract

The utility model relates to the technical field of sulfuric acid circulating tank cleaning, in particular to an automatic filtering and cleaning device for a sulfuric acid circulating tank, which comprises a sulfuric acid absorption tower and a sulfuric acid circulating tank which are connected with each other through a pipeline, and the inside of the sulfuric acid circulating tank is divided into a purification tank and a circulating tank; a second partition plate is arranged between the purifying tank and the circulating tank; a first partition plate is arranged in the purification tank, the first partition plate is obliquely arranged in the purification tank, the bottom of the first partition plate enables the purification tank to be a conical purification tank, and the upper surface of the first partition plate is communicated with a sewage outlet. The circulating acid is subjected to dynamic and static treatment, so that impurities are prevented from moving and suspending due to strong impact of reflux acid and rotational flow stirring at a pump inlet, and the impurities in the circulating acid are settled and removed as soon as possible; the bottom of the purification tank is arranged to be conical, a certain gradient is reserved, and sundries are collected at the drain outlet to be discharged by utilizing the gravity of the sundries and the scouring force of the acid, so that the aim of purifying the circulating acid is fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid circulation tank cleaning, in particular to an automatic filtering and cleaning device for a sulfuric acid circulation tank. Background Art

[0002] In the sulfuric acid dry absorption section, the flue gas from the electrostatic demister is scrubbed with 93% sulfuric acid in a countercurrent flow. The concentrated acid absorbs moisture from the flue gas, drying it. The dried flue gas is then conveyed by a fan to the conversion section for conversion. The sulfuric acid, after absorbing water, is continuously diluted. As the acid becomes less concentrated, concentrated acid is added from the primary absorption cycle to maintain the dry acid concentration. The converted flue gas then comes into countercurrent contact with 98% concentrated sulfuric acid sprayed from the top of the primary absorption tower. SO₃ is scrubbed and absorbed into the concentrated acid, where it combines with the water in the concentrated acid to form sulfuric acid. After absorption, the sulfuric acid solution becomes more concentrated. Water is then added or dried and diluted acid is added to maintain the sulfuric acid concentration. The added acid is cooled and discharged as product acid to the sulfuric acid storage tank. During this cycle, the sulfuric acid continuously scrubs the process gas. Simultaneously, the sulfuric acid is dispersed within the tower through porcelain rings and a wire mesh demister before being collected in the acid return pipe and flowed into the circulating acid tank.

[0003] Due to poor process control and frequent start-up and shutdown caused by equipment failure, a large amount of acid sludge and broken porcelain rings will be generated and brought into the circulating acid. If not cleaned in time, it will damage the acid pump, block and damage acid concentration meters, liquid level meters, electric valves and other equipment, making the production environment worse and even causing accidents.

[0004] The current common practice is to install a large-pore filter on the head of the acid pump, or to shut down the machine regularly to clean the acid tank. This is not effective and requires a lot of work and time, which affects the continuous and efficient operation of production and increases production costs. Utility Model Content

[0005] The purpose of the invention of the utility model is to provide an automatic filtering and cleaning device for a sulfuric acid circulation tank in order to clean up broken porcelain rings, acid mud, wire mesh and other debris in the circulating acid system in a timely manner, so as to keep the production system running in a safe and stable environment, thereby maintaining production efficiency at a high level, improving production efficiency and reducing production costs.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] An automatic filtering and cleaning device for a sulfuric acid circulation tank comprises a sulfuric acid absorption tower and a sulfuric acid circulation tank connected to each other by a pipeline, wherein the sulfuric acid circulation tank is divided into a purification tank and a circulation tank;

[0008] A second partition is provided between the purification tank and the circulation tank;

[0009] A first partition is provided in the purification pool. The first partition is obliquely arranged in the purification pool. The bottom of the first partition makes the purification pool a conical purification pool, and the top of the first partition is connected to the sewage outlet.

[0010] As an improvement to the technical solution of the automatic filtering and cleaning device for sulfuric acid circulation of the present invention, the second partition includes two sections, the upper section is a partition plate, and the lower section is a purification baffle.

[0011] As an improvement to the technical solution of the automatic filtering and cleaning device for sulfuric acid circulation of the present invention, the pipeline includes an acid return pipe and a first pipeline, the acid return pipe is respectively connected to the outlet of the sulfuric acid absorption tower and the inlet of the purification tank; the first pipeline is respectively connected to the outlet of the circulation tank and the inlet of the sulfuric acid absorption tower.

[0012] As an improvement to the technical solution of the sulfuric acid circulation automatic filtering and cleaning device of the present invention, a sulfuric acid circulation pump is provided on the first pipeline.

[0013] As an improvement to the technical solution of the automatic filtering and cleaning device for sulfuric acid circulation of the present invention, the end of the first pipe extends into the upper part of the sulfuric acid absorption tower, and the end of the first pipe is a spray pipe, which is provided with multiple spray pipes.

[0014] As an improvement to the technical solution of the automatic filtering and cleaning device for sulfuric acid circulation of the present invention, the spray pipe is horizontally arranged on the upper part of the sulfuric acid absorption tower.

[0015] As an improvement to the technical solution of the sulfuric acid circulation automatic filtering and cleaning device of the present invention, the sewage outlet is connected to a sewage pipe, and an electric valve is provided on the sewage pipe.

[0016] As an improvement to the technical solution of the automatic filtering and cleaning device for sulfuric acid circulation of the present invention, the angle between the inclination of the first partition and the horizontal plane is 25° to 35°.

[0017] As an improvement to the technical solution of the automatic filtering and cleaning device for sulfuric acid circulation of the present invention, the angle between the inclination of the first partition and the horizontal plane is 30°.

[0018] Beneficial effects of the utility model:

[0019] The utility model processes the circulating acid dynamically and statically, avoiding the movement and suspension of debris caused by the strong impact of the reflux acid and the vortex stirring at the pump inlet, so that the debris in the circulating acid is settled and removed as soon as possible; the bottom of the purification tank is set to be conical with a certain slope, and the gravity of the debris and the scouring force of the acid are used to make the debris gather at the sewage outlet for discharge, thereby achieving the purpose of purifying the circulating acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Explanation of the accompanying symbols: 1-sulfuric acid absorption tower; 2-sulfuric acid circulation tank; 3-purification tank; 4-circulation tank; 5-second partition; 6-first partition; 7-purification baffle; 8-partition plate; 9-acid return pipe; 10-first pipeline; 11-sulfuric acid circulation pump; 12-spray pipe; 13-drain pipe; 14-electric valve. DETAILED DESCRIPTION

[0022] In order to make the purpose of the invention, technical solutions and beneficial effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0023] like Figure 1 As shown, an automatic filtering and cleaning device for a sulfuric acid circulation tank 2 includes a sulfuric acid absorption tower 1 and a sulfuric acid circulation tank 2 interconnected by a pipeline. The sulfuric acid circulation tank 2 is divided into a purification tank 3 and a circulation tank 4; a second partition 5 is provided between the purification tank 3 and the circulation tank 4; a first partition 6 is provided in the purification tank 3, and the first partition 6 is obliquely arranged in the purification tank 3. The bottom of the first partition 6 makes the purification tank 3 into a conical purification tank 3, and the top of the first partition 6 is connected to the sewage outlet.

[0024] The utility model processes the circulating acid dynamically and statically, avoids the strong impact of the reflux acid and the swirling stirring at the inlet of the sulfuric acid circulation pump 11 causing the movement and suspension of debris, and makes the debris in the circulating acid settle and remove as soon as possible; the bottom of the purification tank 3 is set to be conical with a certain slope, and the gravity of the debris and the scouring force of the acid are used to make the debris gather at the sewage outlet for discharge, thereby achieving the purpose of purifying the circulating acid.

[0025] When the utility model is in use, since the bottom of the purification tank 3 is formed into a conical purification tank 3 under the action of the first partition 6, the returned acid with impurities is settled in the conical purification tank 3, and the impurities fall on the bottom of the tank and are collected near the sewage outlet under the action of the scouring force and gravity, and are regularly discharged and cleaned; the purified acid flows into the circulation tank 4 through the purification baffle 7 for continued recycling, thereby ensuring normal and stable production.

[0026] In some embodiments of the present invention, the second partition 5 comprises an upper and lower section, the upper section being a partition plate 8 and the lower section being a purification baffle 7. The partition plate 8 separates the purification tank 3 from the circulation tank 4. Preferably, the sulfuric acid circulation tank 2 is divided into a conical purification tank 3 and a circulation tank 4 in a volume ratio of 1:2, ensuring the space available for the purification tank 3 and the circulation tank 4 and optimizing the space within the sulfuric acid circulation tank 2. Furthermore, preferably, the second partition 5 is divided into the second partition plate 5 and the purification baffle 7 in a ratio of 2:1.

[0027] In some embodiments of the present invention, the height of the second partition 5 is set to be 100 mm lower than the emergency overflow port of the circulation tank; the purification baffle 7 is set to be 100-200 mm lower than the second partition 5 to ensure that the liquid level of the circulation tank is within the process requirements.

[0028] In some embodiments of the present invention, the pipeline includes an acid return pipe 9 and a first pipe 10. The acid return pipe 9 is respectively connected to the outlet of the sulfuric acid absorption tower 1 and the inlet of the purification tank 3; the first pipe 10 is respectively connected to the outlet of the circulation tank 4 and the inlet of the sulfuric acid absorption tower 1. Furthermore, a sulfuric acid circulation pump 11 is provided on the first pipe 10. The provision of the pump body of the sulfuric acid circulation pump 11 accelerates the flow of sulfuric acid in the present invention.

[0029] In some embodiments of the present invention, the end of the first pipe 10 extends into the upper part of the sulfuric acid absorption tower 1 , and the end of the first pipe 10 is a spray pipe 12 , which is provided with a plurality of spray pipes 12 .

[0030] Preferably, the spray pipe 12 is horizontally arranged on the upper part of the sulfuric acid absorption tower 1.

[0031] In some embodiments of the present invention, the sewage outlet is connected to a sewage pipe 13 , and an electric valve 14 is provided on the sewage pipe 13 .

[0032] In some embodiments of the present invention, the angle between the first partition 6 and the horizontal plane is 25° to 35°. Preferably, the angle between the first partition 6 and the horizontal plane is 30°. This ensures that debris slides down to the sewage outlet and prevents debris from accumulating on the first partition 6.

[0033] In some embodiments of the present invention, all components are subjected to anti-corrosion treatment to ensure the service life of the present invention.

[0034] In some embodiments of the present invention, a control system can be used for control, and the start and stop of the electric valve 14 and the sulfuric acid circulation pump 11 are controlled by the control system, thereby achieving the automatic control effect of the present invention.

[0035] Preferably, the control system is a DCS control system, including a DCS controller.

[0036] The DCS controller is the core component of a DCS system, responsible for receiving, processing, and executing instructions and data from various parts of the system. Through a hierarchical, distributed, and open architecture, it enables monitoring, scheduling, control, and management of production processes. The DCS controller boasts high reliability, scalability, ease of maintenance, and a high degree of integration, enabling real-time monitoring and precise control of production processes. The DCS controller can monitor various parameters in industrial processes, such as temperature, pressure, liquid level, and flow, in real time. The real-time collection and analysis of this data facilitates the timely detection of anomalies in the production process. Based on pre-defined control strategies, the DCS controller can generate corresponding control instructions and send them to the actuators for execution, thus achieving automated control of industrial processes.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. An automatic filtering and cleaning device for a sulfuric acid circulation tank, characterized in that: It includes a sulfuric acid absorption tower and a sulfuric acid circulation tank connected to each other by a pipeline, wherein the sulfuric acid circulation tank is divided into a purification tank and a circulation tank; A second partition is provided between the purification tank and the circulation tank; A first partition is provided in the purification pool. The first partition is obliquely arranged in the purification pool. The bottom of the first partition makes the purification pool a conical purification pool, and the top of the first partition is connected to the sewage outlet.

2. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 1, characterized in that: The second partition includes two sections, the upper section is a partition plate, and the lower section is a purification baffle.

3. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 1, characterized in that: The pipeline includes an acid return pipe and a first pipeline. The acid return pipe is respectively connected to the outlet of the sulfuric acid absorption tower and the inlet of the purification tank; the first pipeline is respectively connected to the outlet of the circulation tank and the inlet of the sulfuric acid absorption tower.

4. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 3, characterized in that: The first pipeline is provided with a sulfuric acid circulation pump.

5. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 3, characterized in that: The end of the first pipeline extends into the upper part of the sulfuric acid absorption tower, and the end of the first pipeline is a spray pipe, which is provided with a plurality of spray pipes.

6. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 5, characterized in that: The spray pipe is horizontally arranged on the upper part of the sulfuric acid absorption tower.

7. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 1, characterized in that: The sewage outlet is connected to a sewage pipe, and an electric valve is provided on the sewage pipe.

8. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 1, characterized in that: The angle between the first partition and the horizontal plane is 25° to 35°.

9. The automatic filtering and cleaning device for sulfuric acid circulation tank according to claim 8, characterized in that: The angle between the first partition and the horizontal plane is 30°.

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