Vertical U-shaped pipe cleaning device for MMA device

Abstract

The utility model relates to the technical field of chemical engineering devices, and discloses a vertical U-shaped pipe cleaning device of an MMA device, which comprises a first pipeline, a second pipeline, a third pipeline and a collector, the side wall of the upper end of the collector is provided with a first inlet, the top of the collector is provided with a second inlet and an emptying port, the collector is internally provided with a filter screen, and the filter screen is connected with the third pipeline. An inlet of the first pipeline is connected with a nitrogen source, an outlet of the first pipeline is connected with the second inlet, an inlet of the second pipeline is connected with a water source, an outlet of the third pipeline is connected with the first inlet, and a branch is connected between the first pipeline and the second pipeline. According to the utility model, water washing is firstly carried out, then liquid in the U-shaped pipe is blown into the collector by nitrogen, and residual scale in the U-shaped pipe can be completely taken out by water washing and nitrogen blowing.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a vertical U-shaped tube cleaning device for an MMA unit. Background Technology

[0002] In the MMA (methyl methacrylate) plant, the acylation reactor uses a coil for heat exchange. The acylation reaction is exothermic, requiring circulating water to carry away the heat needed for the reaction. However, due to the high levels of impurities in the circulating water and the high temperature inside the reactor, scale easily forms inside the coil after heating, clogging it and leading to poor heat exchange and numerous side reactions. Because the coil is a vertical U-shaped bend, cleaning during shutdown is ineffective, and traditional cleaning methods cannot thoroughly remove all impurities. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vertical U-shaped tube cleaning device for MMA equipment.

[0004] To achieve the above objectives, the technical solution of this utility model is: a vertical U-shaped tube cleaning device for MMA equipment, comprising a first pipeline, a second pipeline, a third pipeline, and a collector. The upper side wall of the collector is provided with a first inlet, the top of the collector is provided with a second inlet and a vent, the collector is provided with a filter screen inside, and the bottom outlet of the collector is connected to a drain pipeline. The first pipeline is provided with a first ball valve and a gate valve. The inlet of the first pipeline is connected to a nitrogen source, and the outlet is connected to the second inlet at the top of the collector. The second pipeline is provided with a second ball valve and a third ball valve. The inlet of the second pipeline is connected to a water source. The third pipeline is provided with a fourth ball valve. The outlet of the third pipeline is connected to the first inlet on the upper side wall of the collector. A branch is connected between the first pipeline and the second pipeline. One end of the branch is located between the first ball valve and the gate valve, and the other end is located between the second ball valve and the third ball valve.

[0005] Furthermore, the gate valve is located between the first ball valve and the second inlet.

[0006] Furthermore, the outlet of the second pipeline is fitted with a first rubber hose, and the inlet of the third pipeline is fitted with a second rubber hose.

[0007] Furthermore, the second pipeline is provided with a first baffle near the first rubber hose, and the third pipeline is provided with a second baffle near the second rubber hose.

[0008] Furthermore, a pressure gauge is installed on the third pipeline.

[0009] Furthermore, the third ball valve is located between the second ball valve and the first partition.

[0010] Furthermore, a sight glass is provided on the side wall of the collector, and the sight glass is detachably connected to the side wall of the collector. The condition inside the collector can be observed through the sight glass, and the filter screen can be cleaned in a timely manner.

[0011] Furthermore, the filter screen is detachably connected to the inner wall of the collector for easy disassembly and cleaning. The filter screen is located below the sight glass.

[0012] Furthermore, the collector has a vertically arranged partition plate on its inner upper wall, and the top of the partition plate is connected to the outer periphery of the second inlet and away from the first inlet.

[0013] Furthermore, a fifth ball valve is provided on the drainage pipe.

[0014] The beneficial effects of this utility model are:

[0015] (1) This utility model first rinses with water and then blows the liquid in the U-shaped tube into the collector with nitrogen. The water washing and nitrogen blowing can remove all the residual scale in the U-shaped tube.

[0016] (2) The collector can fully separate and recycle the washed waste, protect the environment, and save the cost of secondary waste recycling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a top view of the filter screen of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the collector of this utility model.

[0020] In the diagram: 1. First pipeline; 11. First ball valve; 12. Gate valve; 2. Second pipeline; 21. Second ball valve; 22. Third ball valve; 23. First baffle; 24. First rubber hose; 3. Third pipeline; 31. Fourth ball valve; 32. Second baffle; 33. Second rubber hose; 34. Pressure gauge; 4. Branch line; 5. Collector; 51. First inlet; 52. Second inlet; 53. Vent; 54. Sight glass; 55. Filter screen; 56. Drainage pipeline; 57. Fifth ball valve; 58. Isolation plate. Detailed Implementation

[0021] Example:

[0022] like Figures 1 to 3As shown, a vertical U-shaped tube cleaning device for an MMA (Mechanical Manufacturing) unit includes a first pipe 1, a second pipe 2, a third pipe 3, and a collector 5. The collector 5 has a first inlet 51 on its upper side wall, a second inlet 52 and a vent 53 at its top, a filter screen 55 inside, and a drain pipe 56 connected to its bottom outlet. A fifth ball valve 57 is installed on the drain pipe 56. The first pipe 1 has a first ball valve 11 and a gate valve 12. The inlet of the first pipe 1 is connected to a nitrogen source, and the outlet is connected to the second inlet 52 at the top of the collector 5. The second pipe 2 has a second ball valve 21 and a third ball valve 22. The inlet of the second pipe 2 is connected to a water source. The third pipe 3 has a fourth ball valve 31, and the outlet of the third pipe 3 is connected to the first inlet 51. A branch pipe 4 connects the first pipe 1 and the second pipe 2. One end of the branch pipe 4 is located between the first ball valve 11 and the gate valve 12, and the other end is located between the second ball valve 21 and the third ball valve 22.

[0023] The gate valve 12 is located between the first ball valve 11 and the second inlet 52, and the third ball valve 22 is located between the second ball valve 21 and the first partition 23.

[0024] The outlet of the second pipeline 2 is fitted with a first rubber hose 24, and the inlet of the third pipeline 3 is fitted with a second rubber hose 33. A first baffle 23 is provided on the outer wall of the second pipeline 2 near the first rubber hose 24, and a second baffle 32 is provided on the outer wall of the third pipeline 3 near the second rubber hose 33. A pressure gauge 34 is provided on the third pipeline 3.

[0025] The collector 5 has a viewing mirror 54 on its side wall, and the viewing mirror 54 is detachably connected to the side wall of the collector 5. The filter screen 55 is detachably connected to the inner wall of the collector 5, and the filter screen 55 is located below the viewing mirror 54.

[0026] The collector 5 has a vertically arranged isolation plate 58 on its inner upper wall. The top of the isolation plate 58 is connected to the outer periphery of the second inlet 52 and is away from the first inlet 51.

[0027] Working principle:

[0028] Step 1: Insert the first rubber hose 24 into the inlet of the U-shaped tube to be cleaned, and the second rubber hose 33 into the outlet of the U-shaped tube to be cleaned;

[0029] Step 2: Close the first ball valve 11 and the gate valve 12, open the second ball valve 21, the third ball valve 22 and the fourth ball valve 31 to flush the U-tube with water. After that, close the second ball valve 21, open the first ball valve 11 and blow the residual scale in the U-tube into the collector 5 with nitrogen. The mixed water and gas rush onto the isolation plate 58, and the liquid flows onto the filter screen 55 below. The gas flows out from under the isolation plate 58 and is discharged from the vent 53, so that the water and gas are fully separated. After filtration, the liquid is discharged into the ton container by opening the fifth ball valve 57 and then sent to the SAR device for incineration after the start of operation.

[0030] Step 3: Then keep the first ball valve 11 and the third ball valve 22 open, and close all other valves. Observe the pressure gauge 34 to perform an airtightness test on each U-tube.

[0031] Step 4: After the airtight seal is completed, close the first ball valve 11 and the third ball valve 22, and open the second ball valve 21 and the gate valve 12 to flush the collector 5.

[0032] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

[0033] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A vertical U-shaped tube cleaning device for MMA equipment, characterized in that: The system includes a first pipeline (1), a second pipeline (2), a third pipeline (3), and a collector (5). The collector (5) has a first inlet (51) on its upper side wall, a second inlet (52) and a vent (53) on its top. The collector (5) has a filter screen (55) inside, and its bottom outlet is connected to a drain pipe (56). The first pipeline (1) has a first ball valve (11) and a gate valve (12). The inlet of the first pipeline (1) is connected to a nitrogen source, and its outlet is connected to the second inlet (52) on the top of the collector (5). The inlet (52) is provided with a second ball valve (21) and a third ball valve (22). The inlet of the second pipeline (2) is connected to a water source. The third pipeline (3) is provided with a fourth ball valve (31). The outlet of the third pipeline (3) is connected to the first inlet (51) on the upper side wall of the collector (5). A branch (4) is connected between the first pipeline (1) and the second pipeline (2). One end of the branch (4) is located between the first ball valve (11) and the gate valve (12), and the other end is located between the second ball valve (21) and the third ball valve (22).

2. The vertical U-shaped tube cleaning device for MMA equipment according to claim 1, characterized in that: The gate valve (12) is located between the first ball valve (11) and the second inlet (52).

3. The vertical U-shaped tube cleaning device for MMA equipment according to claim 2, characterized in that: The outlet of the second pipeline (2) is fitted with a first rubber hose (24), and the inlet of the third pipeline (3) is fitted with a second rubber hose (33).

4. The vertical U-shaped tube cleaning device for MMA equipment according to claim 3, characterized in that: The second pipeline (2) is provided with a first baffle (23) near the first rubber hose (24), and the third pipeline (3) is provided with a second baffle (32) near the second rubber hose (33).

5. The vertical U-shaped tube cleaning device for MMA equipment according to claim 1, characterized in that: A pressure gauge (34) is installed on the third pipeline (3).

6. The vertical U-shaped tube cleaning device for MMA equipment according to claim 4, characterized in that: The third ball valve (22) is located between the second ball valve (21) and the first partition (23).

7. The vertical U-shaped tube cleaning device for MMA equipment according to claim 1, characterized in that: The collector (5) has a viewing mirror (54) on its side wall, and the viewing mirror (54) is detachably connected to the side wall of the collector (5).

8. The vertical U-shaped tube cleaning device for MMA equipment according to claim 7, characterized in that: The filter screen (55) is detachably connected to the inner wall of the collector (5), and the filter screen (55) is located below the sight glass (54).

9. The vertical U-shaped tube cleaning device for MMA equipment according to claim 1, characterized in that: The collector (5) has a vertically arranged partition plate (58) on its inner upper wall. The top of the partition plate (58) is connected to the outer periphery of the second inlet (52) and is away from the first inlet (51).

10. The vertical U-shaped tube cleaning device for MMA equipment according to claim 1, characterized in that: The drainage pipe (56) is equipped with a fifth ball valve (57).

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