Chemical cleaning system for anaerobic recycle loop

Abstract

The utility model discloses an anaerobic circulation pipeline's chemical descaling system, including pipeline, set up on the pipeline's descaling unit and detachable set up in the sealed unit of pipeline end, the descaling unit includes the cleaning water tank, set up on the water inlet valve of pipeline front end upside, set up in the back end downside of pipeline water return valve and circulating pump, the cleaning water tank one side lower part is equipped with the water outlet, and the other side upper part is equipped with the water return, the circulating pump is located at the water outlet and is connected with water inlet valve, and the water return is connected with water return valve, the cleaning water tank is connected with the liquid inlet pipe, and the liquid inlet pipe is connected with the faucet and carries out the liquid supply, the utility model discloses have the advantages of high descaling efficiency, convenient and safer.

Description

Technical Field

[0001] This utility model relates to the technical field of anaerobic treatment equipment, and in particular to a chemical descaling system for anaerobic circulation pipelines. Background Technology

[0002] In anaerobic treatment systems, such as UASB and IC reactors, fouling composed of microbial metabolic products and mineral deposits accumulates in the circulation pipelines after long-term operation. This fouling can cause a series of problems:

[0003] 1. Reduced flow area in pipelines: Scale adheres to the inner wall of the pipeline, occupying the effective flow space and significantly increasing the resistance of fluid flow in the pipeline, thus affecting the efficiency of material transmission.

[0004] 2. Causes a decrease in system operating efficiency: Due to the increased fluid resistance, more energy is required to drive the fluid flow in order to ensure the normal operation of the system. This undoubtedly increases the energy consumption of the system and reduces the overall operating efficiency.

[0005] 3. Increased risk of localized pipeline corrosion: The presence of dirt can damage the original state of the pipeline surface, creating a localized corrosive environment that makes the pipeline more susceptible to corrosion, thereby shortening the service life of the pipeline.

[0006] 4. Increased maintenance costs: In order to maintain the stable operation of the system, it is necessary to clean and maintain the pipeline regularly. This not only increases the input of manpower and material resources, but may also lead to system downtime and production losses, thereby significantly increasing maintenance costs.

[0007] To address the problem of scaling, two common methods are mechanical descaling and chemical descaling. However, in practical applications, it has been found that both methods have certain drawbacks:

[0008] 1. Mechanical scraping method: This method of descaling requires stopping the machine and disassembling the pipeline, and each descaling operation takes a long time. Moreover, the process of scraping off the dirt can easily damage the pipe wall and pipeline, thus affecting the structural integrity of the pipeline. In addition, this method is usually done manually, and the operator needs to work in a confined space or at height, which poses certain safety hazards and is labor-intensive.

[0009] 2. Acid pickling and soaking method: This method uses a special acid pickling and descaling solution for soaking and descaling. However, the utilization rate of the agent is low, usually less than 40%, resulting in waste of the agent. In addition, many harmful gases, such as carbon dioxide, are generated during the acid pickling process, which poses a great threat to the health of operators and the environment. Moreover, corrosive chloride ions may be generated during the acid pickling process, which can corrode the pipelines. The operation of corrosive components is also highly dangerous. Utility Model Content

[0010] The purpose of this invention is to provide a chemical descaling system for anaerobic circulation pipelines. This invention has the advantages of high descaling efficiency, convenience, and enhanced safety.

[0011] The technical solution of this utility model is a chemical descaling system for an anaerobic circulation pipeline, comprising a pipeline, a descaling unit installed on the pipeline, and a detachable sealing unit installed at the end of the pipeline; the descaling unit includes a cleaning water tank, an inlet valve located on the upper side of the front end of the pipeline, a return valve located on the lower side of the rear end of the pipeline, and a circulation pump; the cleaning water tank has an outlet on the lower part of one side and a return port on the upper part of the other side; the circulation pump is located at the outlet and connected to the inlet valve, and the return port is connected to the return valve; the cleaning water tank is connected to an inlet pipe, and the inlet pipe is connected to a faucet for supplying liquid.

[0012] In the aforementioned chemical descaling system of the anaerobic circulation pipeline, the cleaning water tank is equipped with a pH meter and a control unit; the bottom of the cleaning water tank is equipped with a drain pipe, and the drain pipe is equipped with a drain pump and a corresponding drain valve; the control unit is connected to the pH meter, the drain pump, the drain valve, the inlet valve, the return valve, and the circulation pump.

[0013] In the aforementioned chemical descaling system of the anaerobic circulation pipeline, an outlet valve is provided at the outlet.

[0014] In the aforementioned chemical descaling system for anaerobic circulation pipelines, the sealing unit includes a front blind plate located at the front end of the pipeline and a rear blind plate located at the rear end of the pipeline.

[0015] In the aforementioned chemical descaling system of the anaerobic circulation pipeline, the inlet valve is connected to the circulation pump via an inlet hose; the return valve is connected to the return port via a return hose.

[0016] In the aforementioned chemical descaling system of the anaerobic circulation pipeline, the cleaning water tank is equipped with a stirring unit and a filter screen located at the outlet; the stirring unit includes a vertically arranged stirring motor, a stirring shaft connected to the output shaft of the stirring motor, and stirring blades sleeved on the stirring shaft; the stirring blades include an upper arc-shaped stirring blade and a lower anchor-shaped stirring blade, the bottom of the anchor-shaped stirring blade corresponding to the bottom of the cleaning water tank.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] 1. High-efficiency descaling: By installing inlet and outlet valves on the pipeline, the pipeline is connected to the cleaning water tank to form a cleaning channel. The descaling solution in the cleaning water tank is continuously pumped into the pipeline for descaling and cleaning using a circulating pump. Descaling can be carried out without disassembling the pipeline, resulting in higher descaling efficiency.

[0019] 2. Flexible use: This application's descaling operation is not limited by the site and can be flexibly set up for cleaning according to the actual situation, making it convenient to use in different working environments;

[0020] 3. Save reagents: By using a circulating pump combined with an inlet valve and a return valve to form a circulating cleaning channel, the descaling solution after cleaning returns to the cleaning water tank through the return port, thus recycling the descaling solution. This can effectively reduce the amount of descaling agent used, reduce descaling costs, and also reduce the environmental impact of descaling agents.

[0021] 4. Reduced risk: With this application, workers do not need to directly contact the descaling solution or descaling equipment. The cleaning and descaling are carried out automatically by the circulation pump, which reduces labor intensity and the time that operators spend working in harsh environments, thus reducing safety risks. Moreover, the entire cleaning process will not cause pollution risks to the surrounding environment.

[0022] Therefore, this utility model has the advantages of high descaling efficiency, convenience and greater safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] The labels in the attached diagram are: 1-front blind plate, 2-pipe, 3-inlet valve, 4-inlet hose, 5-circulation pump, 6-inlet pipe, 7-cleaning water tank, 8-return hose, 9-rear blind plate, 10-return valve, 11-outlet valve, 12-pH meter. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0026] Example. Chemical descaling system for anaerobic circulation pipelines, such as... Figure 1 As shown, the system includes a pipe 2, a descaling unit mounted on the pipe 2, and a detachable sealing unit located at the end of the pipe 2. The descaling unit includes a cleaning water tank 7, an inlet valve 3 located on the upper side of the front end of the pipe 2, a return valve 10 located on the lower side of the rear end of the pipe 2, and a circulation pump 5. The cleaning water tank 7 has an outlet on one side at the lower part and a return port on the other side at the upper part. The circulation pump 5 is located at the outlet and connected to the inlet valve 3, and the return port is connected to the return valve 10. The cleaning water tank 7 is connected to an inlet pipe 6, which is connected to a faucet for supplying liquid.

[0027] The cleaning water tank 7 is equipped with a pH meter 12 and a control unit; the lower part of the cleaning water tank 7 is equipped with a drain pipe, and the drain pipe is equipped with a drain pump and a corresponding drain valve; the control unit is connected to the pH meter 12, the drain pump, the drain valve, the inlet valve 3, the return valve 10 and the circulation pump 5.

[0028] The sewage pipe is equipped with a sewage pump for pumping out sewage.

[0029] A water outlet valve 11 is provided at the water outlet.

[0030] The sealing unit includes a front blind plate 1 located at the front end of the pipe 2 and a rear blind plate 9 located at the rear end of the pipe 2.

[0031] The inlet valve 3 is connected to the circulation pump 5 via the inlet hose 4; the return valve 10 is connected to the return port via the return hose 8; the inlet hose 4 and the return hose 8 are made of metal hoses.

[0032] The cleaning water tank 7 is equipped with a stirring unit and a filter screen at the water outlet; the stirring unit includes a vertically arranged stirring motor, a stirring shaft connected to the output shaft of the stirring motor, and stirring blades sleeved on the stirring shaft; the stirring blades include an upper arc-shaped stirring blade and a lower anchor-shaped stirring blade, the bottom of the anchor-shaped stirring blade corresponding to the bottom of the cleaning water tank 7.

[0033] Working principle

[0034] When it is necessary to clean and descale pipe 2, first install front blind plate 1 and rear blind plate 9 at both ends of pipe 2 to block pipe 2; then connect the inlet valve 3 and return valve 10 on pipe 2 to the corresponding circulation pump 5 and return port through inlet hose 4 and return hose 8 respectively, and connect the cleaning water tank 7 to form a cleaning pipeline.

[0035] Tap water is injected into the cleaning water tank 7 through the inlet pipe 6, and descaling solution is added; the inlet valve 3, return valve 10, circulation pump 5 and outlet valve 11 are opened, and the descaling cleaning solution in the cleaning water tank 7 is continuously fed into the pipe 2 for descaling and cleaning and then returned to the cleaning water tank 7.

[0036] Observe the turbidity of the liquid in the cleaning water tank 7 and combine it with the pH value fed back by pH meter 12 to determine the content of descaling solution in the cleaning water tank 7, and add descaling solution as appropriate.

[0037] When the cleaning is complete or there are too many solid impurities, close the outlet valve 11 and the return valve 10, open the drain valve and the drain pump, and start the stirring motor at the same time to drain the sewage in the cleaning water tank 7.

[0038] After draining, close the drain valve and drain pump, and then repeat the cleaning and descaling process.

Claims

1. A chemical descaling system for anaerobic circulation pipelines, characterized in that: The system includes a pipe (2), a descaling unit installed on the pipe (2), and a detachable sealing unit installed at the end of the pipe (2). The descaling unit includes a cleaning water tank (7), an inlet valve (3) installed on the upper side of the front end of the pipe (2), a return valve (10) installed on the lower side of the rear end of the pipe (2), and a circulation pump (5). The cleaning water tank (7) has an outlet on one side and a return port on the upper side. The circulation pump (5) is installed at the outlet and connected to the inlet valve (3). The return port is connected to the return valve (10). The cleaning water tank (7) is connected to an inlet pipe (6), which is connected to a faucet for supplying liquid.

2. The chemical descaling system for anaerobic circulation pipelines according to claim 1, characterized in that: The cleaning water tank (7) is equipped with a pH meter (12) and a control unit; the bottom of the cleaning water tank (7) is equipped with a drain pipe, and the drain pipe is equipped with a drain pump and a corresponding drain valve; the control unit is connected to the pH meter (12), the drain pump, the drain valve, the inlet valve (3), the return valve (10) and the circulation pump (5).

3. The chemical descaling system for anaerobic circulation pipelines according to claim 1, characterized in that: A water outlet valve (11) is provided at the water outlet.

4. The chemical descaling system for anaerobic circulation pipelines according to claim 1, characterized in that: The sealing unit includes a front blind plate (1) located at the front end of the pipe (2) and a rear blind plate (9) located at the rear end of the pipe (2).

5. The chemical descaling system for anaerobic circulation pipelines according to claim 1, characterized in that: The inlet valve (3) is connected to the circulation pump (5) via the inlet hose (4); the return valve (10) is connected to the return port via the return hose (8).

6. The chemical descaling system for anaerobic circulation pipelines according to claim 1, characterized in that: The cleaning water tank (7) is equipped with a stirring unit and a filter screen at the water outlet; the stirring unit includes a vertically arranged stirring motor, a stirring shaft connected to the output shaft of the stirring motor, and stirring blades sleeved on the stirring shaft; the stirring blades include an upper arc-shaped stirring blade and a bottom anchor-shaped stirring blade, the bottom of the anchor-shaped stirring blade corresponding to the bottom of the cleaning water tank (7).

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