Primary cooler descaling device

Abstract

The utility model relates to the technical field of primary coolers, in particular to a descaling device for a primary cooler, which is characterized in that a backwashing water return valve is connected to a cooling water feeding pipe in parallel, a gas-water pulse flow feeding valve is connected to a cooling water return pipe in parallel, a gas-water mixing device, an ultrasonic flowmeter and a gas flowmeter are arranged at the tail end of the gas-water pulse flow feeding valve, and the gas-water mixing device is connected with the ultrasonic flowmeter and the gas flowmeter. The other end of the ultrasonic flowmeter is connected with a ball valve through a pipeline, the other side of the gas flowmeter is connected with a pressure stabilizing device through a pipeline, and the other end of the pressure stabilizing device is connected with an air compressor through a pipeline. The gas-water mixing device comprises a main pipe section, a backwashing water inlet interface, a backwashing gas inlet interface, a pressure sensor interface and a guide plate; the gas-water pulse flow water feeding valve and the backwashing water return valve are connected to the cooling water feeding pipe and the cooling water return pipe in parallel, so that the primary cooler pipeline is easier and more efficient to clean, the service life of the primary cooler is prolonged, and the effects of reducing cost and improving efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to primary cooler technical field, especially a primary cooler descaling device. BACKGROUND

[0002] In the coal gas purification system of the coking plant, the primary cooler is a vital equipment, and its main function is to cool the high-temperature raw gas (also known as the raw gas) from the carbonization chamber, and the heat exchange efficiency reduction process (also known as the aging process) of the primary cooler can be regarded as an irreversible process.

[0003] When the existing primary cooler heat exchange pipe has the problem of internal structure blockage, chemical cleaning and physical cleaning methods can be used for treatment.

[0004] However, in the implementation process of the above technical scheme, at least the following technical problems are found: chemical cleaning can cause corrosion to the primary cooler and the heat exchange pipe, and is not recommended for use; physical cleaning needs to hire professional cleaning construction teams, which not only needs to spend a lot of financial resources, but also causes great influence on the on-site environment during construction, so reducing the damage speed of the primary cooler, improving the service life of the primary cooler, and reducing the decline speed of the heat exchange efficiency can realize cost reduction and benefit increase. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a primary cooler descaling device, which solves the technical problems that chemical cleaning can cause corrosion to the primary cooler and the heat exchange pipe, and is not recommended for use; physical cleaning needs to hire professional cleaning construction teams, which not only needs to spend a lot of financial resources, but also causes great influence on the on-site environment during construction, so reducing the damage speed of the primary cooler, improving the service life of the primary cooler, and reducing the decline speed of the heat exchange efficiency can realize cost reduction and benefit increase.

[0006] To achieve the above purpose, the utility model is implemented by the following technical scheme:

[0007] The utility model provides a kind of primary cooler descaling device, including horizontal tube type primary cooler, cooling water upper water pipe is fixedly installed on horizontal tube type primary cooler, cooling water backwater valve is fixedly installed at the end of cooling water upper water pipe, cooling water backwater pipe is fixedly installed on horizontal tube type primary cooler, cooling water upwater valve is fixedly installed at the end of cooling water backwater pipe, cooling water backwater pipe is fixedly installed on horizontal tube type primary cooler, backflush backwater valve is connected in parallel on cooling water upper water pipe, gas-water pulse flow upwater valve is connected in parallel on cooling water backwater pipe, gas-water mixing device, ultrasonic flowmeter and gas flowmeter are provided at the end of gas-water pulse flow upwater valve, the other end of ultrasonic flowmeter is connected with ball valve by pipeline, the other side of gas flowmeter is connected with pressure stabilizing device by pipeline, the other end of pressure stabilizing device is connected with air compressor by pipeline, first pressure sensor for detecting water pressure is fixedly installed on cooling water upper water pipe, second pressure sensor for detecting water pressure is fixedly installed on cooling water backwater pipe, gas-water mixing device includes main pipe section, backflush water inlet, backflush air inlet, pressure sensor interface and flow guide plate, the axis of backflush water inlet and backflush air inlet exists with the axis of main pipe section angle, flow guide plate is located at the intersection of the axis of backflush water inlet and backflush air inlet, pressure sensor interface is opened in the upper of main pipe section, main pipe section is connected with gas-water pulse flow upwater valve by pipeline, backflush water inlet is connected with ultrasonic flowmeter by pipeline, backflush air inlet is connected with gas flowmeter by pipeline.

[0008] Preferably, a differential pressure sensor is installed between the second pressure sensor and the first pressure sensor.

[0009] Preferably, the differential pressure sensor, the second pressure sensor and the first pressure sensor are connected with a data acquisition box through signal lines.

[0010] Preferably, the data acquisition box is connected with a computer through signal lines.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] I. By connecting the gas-water pulse flow upwater valve and the backflush backwater valve in parallel on the cooling water upper water pipe and the cooling water backwater pipe, and by cleaning with mixed gas-water pulse, the primary cooler pipeline can be cleaned more simply and efficiently, which is beneficial to prolong the service life of the primary cooler and achieves the effect of reducing cost and increasing efficiency.

[0013] II. The first pressure sensor and the second pressure sensor detect the pressure of the cooling water, and the differential pressure sensor compares the water inlet and outlet pressures in the pipeline in real time, and then the computer calculates and analyzes the state of the pipeline to determine the scaling state of the primary cooler pipeline, which achieves the effect of quickly and timely determining whether the primary cooler pipeline needs to be cleaned.

[0014] III. The ultrasonic flow meter and the gas flow meter accurately calculate the water flow and the gas flow in the process, so that the ratio of the gas and the water can reach the best state, and the cleaning ability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, and can be implemented in accordance with the content of the specification, the following is a preferred embodiment of the present application and the detailed description of the drawings as follows.

[0016] Figure 1 It is a conventional primary cooler system structure diagram;

[0017] Figure 2 It is a cleaning system structure diagram of the present application;

[0018] Figure 3 It is a gas and water pulse generation and control system structure diagram of the present application;

[0019] Figure 4 It is a main pipe section structure diagram of the present application;

[0020] Figure 5 It is a gas and water mixing device cross section structure diagram of the present application.

[0021] Legend: 1, horizontal tube type primary cooler; 2, cooling water up pipe; 3, cooling water back pipe; 4, cooling water up valve; 5, cooling water back valve; 6, gas and water pulse flow up valve; 7, backwash back valve; 8, first pressure sensor; 9, differential pressure sensor; 10, second pressure sensor; 11, gas and water mixing device; 12, ultrasonic flow meter; 13, ball valve; 14, data acquisition box; 15, computer; 16, gas flow meter; 17, pressure stabilizing device; 18, air compressor; 19, main pipe section; 20, backwash water inlet; 21, backwash gas inlet; 22, pressure sensor interface; 23, flow guide plate. DETAILED DESCRIPTION

[0022] The embodiment of the application provides a de-scaling device for a primary cooler, effectively solves the problem that chemical cleaning can cause certain corrosion to the primary cooler and heat exchange pipe and is not recommended to be used, physical cleaning needs to employ a professional cleaning construction team, not only needs to spend a large amount of financial resources, but also causes great influence on the on-site environment during construction, therefore, reducing the damage speed of the primary cooler, improving the use cycle of the primary cooler and reducing the decline speed of the heat exchange efficiency can realize the technical problem of cost reduction and benefit increase, the gas-water pulse flow water inlet valve and the backwashing water outlet valve are connected in parallel on the cooling water inlet pipe and the cooling water return pipe, cleaning is performed through the mixed gas-water pulse, the primary cooler pipe is cleaned more simply and efficiently, the use cycle of the primary cooler is improved, the effect of cost reduction and benefit increase is achieved, the first pressure sensor and the second pressure sensor detect the pressure of the cooling water, the pressure of water in and out of the pipe is compared in real time through cooperation of the pressure difference sensor, then the pipe state is rapidly detected and analyzed through calculation of the computer, the scaling state of the primary cooler pipe is judged, the effect that whether the primary cooler pipe needs to be cleaned can be rapidly and timely judged is achieved, the ultrasonic flowmeter and the gas flowmeter accurately calculate the water flow and the gas flow in the process, the ratio of the gas and the water can reach the best state, the effect that the cleaning capacity is improved is achieved.

[0023] Embodiment

[0024] As Figure 1 , Figure 2 and Figure 3 indicated, the technical scheme in the embodiment of the application effectively solves the problem that chemical cleaning can cause certain corrosion to the primary cooler and heat exchange pipe and is not recommended to be used, physical cleaning needs to employ a professional cleaning construction team, not only needs to spend a large amount of financial resources, but also causes great influence on the on-site environment during construction, therefore, reducing the damage speed of the primary cooler, improving the use cycle of the primary cooler and reducing the decline speed of the heat exchange efficiency can realize the technical problem of cost reduction and benefit increase, the general idea is as follows:

[0025] In view of the problems in the prior art, the utility model provides a kind of primary cooler de-scaling device, including horizontal pipe type primary cooler 1, horizontal pipe type primary cooler 1 is fixedly installed with cooling water inlet pipe 2, the end of cooling water inlet pipe 2 is fixedly installed with cooling water return valve 5, horizontal pipe type primary cooler 1 is fixedly installed with cooling water return pipe 3, the end of cooling water return pipe 3 is fixedly installed with cooling water inlet valve 4, horizontal pipe type primary cooler 1 is fixedly installed with cooling water return pipe 3, and cooling water inlet pipe 2 is connected in parallel with backwashing water outlet valve 7, and cooling water return pipe 3 is connected in parallel with gas-water pulse flow water inlet valve 6.

[0026] In summary, by connecting the air-water pulse flow up water valve 6 and backwash back water valve 7 on the cooling water up water pipe 2 and cooling water back water pipe 3, cleaning is carried out by mixed air-water pulse, which is more simple and efficient when cleaning the primary cooler pipeline, is beneficial to improve the service life of the primary cooler, and achieves the effect of reducing cost and increasing efficiency

[0027] The end of the air-water pulse flow up water valve 6 is provided with an air-water mixing device 11, an ultrasonic flow meter 12 and a gas flow meter 16. The other end of the ultrasonic flow meter 12 is connected with a ball valve 13 through a pipeline. The other side of the gas flow meter 16 is connected with a pressure stabilizing device 17 through a pipeline. The other end of the pressure stabilizing device 17 is connected with an air compressor 18 through a pipeline. The air-water mixing device 11 comprises a main pipe section 19, a backwash water inlet interface 20, a backwash air inlet interface 21, a pressure sensor interface 22 and a flow guide plate 23. The axes of the backwash water inlet interface 20 and the backwash air inlet interface 21 have a 30-degree angle with the axis of the main pipe section 19. The flow guide plate 23 is located at the intersection of the axes of the backwash water inlet interface 20 and the backwash air inlet interface 21. The pressure sensor interface 22 is opened above the main pipe section 19. The main pipe section 19 is connected with the air-water pulse flow up water valve 6 through a pipeline. The backwash water inlet interface 20 is connected with the ultrasonic flow meter 12 through a pipeline. The backwash air inlet interface 21 is connected with the gas flow meter 16 through a pipeline.

[0028] In summary, the ultrasonic flow meter 12 and the gas flow meter 16 accurately calculate the water flow and the gas flow in this process, so that the ratio of air and water can reach the best state, and the cleaning ability is improved.

[0029] A first pressure sensor 8 for detecting water pressure is fixedly installed on the cooling water up water pipe 2. A second pressure sensor 10 for detecting water pressure is fixedly installed on the cooling water back water pipe 3. A differential pressure sensor 9 is installed between the second pressure sensor 10 and the first pressure sensor 8. The differential pressure sensor 9, the second pressure sensor 10 and the first pressure sensor 8 are all connected with a data acquisition box 14 through signal lines. The data acquisition box 14 is connected with a computer 15 through a signal line.

[0030] In summary, the first pressure sensor 8 and the second pressure sensor 10 will detect the pressure of the cooling water. The differential pressure sensor 9 can compare the water pressure in and out of the pipeline in real time. Then, the computer 15 is used for calculation. The state of the pipeline is quickly detected and analyzed to judge the scaling state of the primary cooler pipeline. The effect that whether the primary cooler pipeline needs to be cleaned can be quickly and timely judged is achieved.

[0031] Working principle:

[0032] First, the cooling water inlet valve 4, the cooling water outlet valve 5, the air-water pulse flow inlet valve 6, the backwash outlet valve 7, the ultrasonic flow meter 12, the ball valve 13, the computer 15, the gas flow meter 16 and the air compressor 18 are connected to the PLC control system. When the cooling water enters the horizontal pipe type primary cooler 1 from the cooling water inlet pipe 2 and is discharged from the cooling water outlet pipe 3, the first pressure sensor 8 and the second pressure sensor 10 detect the pressure of the cooling water. The differential pressure sensor 9 compares the pressure of the water flowing in and out of the pipe in real time. Then, the computer 15 calculates the state of the pipe to determine the fouling state of the primary cooler pipe. When the computer 15 determines that the pipe needs to be cleaned, the computer 15 controls the PLC control system to close the cooling water outlet valve 5 and the cooling water inlet valve 4, open the air-water pulse flow inlet valve 6, the backwash outlet valve 7 and the ball valve 13 (the other end of the ball valve 13 is connected to the water supply mechanism, which can be a pressurized water source of the cooling water supply system), and start the air compressor 18. After the air compressor 18 is started, it injects compressed air into the pressure stabilizing device 17. The pressure stabilizing device 17 adjusts the pressure of the compressed air and then makes the compressed air pass through the gas flow meter 16 and enter the air-water mixing device 11. After the ball valve 13 is opened, the water flow passes through the ultrasonic flow meter 12 and enters the air-water mixing device 11. The air and water are mixed in the air-water mixing device 11, and the air-water mixture formed by the mixing enters the horizontal pipe type primary cooler 1 from the cooling water outlet pipe 3 and is discharged from the cooling water inlet pipe 2. In this process, the air-water mixture in the pipe produces turbulent flow, which generates impact by air bubble breaking and flow scouring effect on the pipe, causing the scale, rust and other attachments on the inner surface of the primary cooler cooling water pipe to break off and enter the filter in the outlet pipe.

[0033] Second, the ultrasonic flow meter 12 and the gas flow meter 16 accurately calculate the water flow and gas flow during the process, so that the ratio of air to water can be optimized. After cleaning is completed, the components are reset, and the first pressure sensor 8, the differential pressure sensor 9 and the second pressure sensor 10 detect the pressure of the water flow in the pipe again to timely understand the completion of the cleaning and evaluate the cost benefit of the cleaning effect.

[0034] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present application and are not limiting. Those skilled in the art can make other different forms of changes or variations based on the above description. Here, it is not necessary or possible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the scope of the present application.

Claims

1. A de-scaling device for a primary cooler, comprising a horizontal tube primary cooler (1), a cooling water up-water pipe (2) is fixedly installed on the horizontal tube primary cooler (1), a cooling water back-water valve (5) is fixedly installed at the end of the cooling water up-water pipe (2), a cooling water back-water pipe (3) is fixedly installed on the horizontal tube primary cooler (1), and a cooling water up-water valve (4) is fixedly installed at the end of the cooling water back-water pipe (3), characterized in that, The cooling water up pipe (2) is connected with a backwashing backwater valve (7) in parallel, the cooling water backwater pipe (3) is connected with a gas-water pulse flow up valve (6) in parallel, the tail end of the gas-water pulse flow up valve (6) is provided with a gas-water mixing device (11), an ultrasonic flowmeter (12) and a gas flowmeter (16), the other end of the ultrasonic flowmeter (12) is connected with a ball valve (13) through a pipeline, the other side of the gas flowmeter (16) is connected with a pressure stabilizing device (17) through a pipeline, the other end of the pressure stabilizing device (17) is connected with an air compressor (18) through a pipeline, a first pressure sensor (8) for detecting water pressure is fixedly installed on the cooling water up pipe (2), a second pressure sensor (10) for detecting water pressure is fixedly installed on the cooling water backwater pipe (3), the gas-water mixing device (11) comprises a main pipe section (19), a backwashing water inlet interface (20), a backwashing air inlet interface (21), a pressure sensor interface (22) and a flow guide plate (23).

2. A device for removing scale from a LP evaporator as claimed in claim 1, wherein, The axes of the backwashing water inlet interface (20) and the backwashing air inlet interface (21) and the axis of the main pipe section (19) form an angle of 30 degrees, the flow guide plate (23) is located at the intersection of the axes of the backwashing water inlet interface (20) and the backwashing air inlet interface (21), and the pressure sensor interface (22) is arranged above the main pipe section (19).

3. A device for removing scale from a LP evaporator as claimed in claim 1, wherein, The main pipe section (19) is connected with the gas-water pulse flow up valve (6) through a pipeline, the backwashing water inlet interface (20) is connected with the ultrasonic flowmeter (12) through a pipeline, and the backwashing air inlet interface (21) is connected with the gas flowmeter (16) through a pipeline.

4. A lubricant removal device for a lube cooler as set forth in claim 3, wherein The differential pressure sensor (9) is installed between the second pressure sensor (10) and the first pressure sensor (8).

5. A lubricant removal device for a lube cooler as set forth in claim 4, wherein The differential pressure sensor (9), the second pressure sensor (10) and the first pressure sensor (8) are connected with a data acquisition box (14) through signal lines.

6. A lubricant removal device for a lube cooler as set forth in claim 5, wherein The data acquisition box (14) is connected with a computer (15) through a signal line.

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