Maleic anhydride removing device suitable for on-line analyzer

Abstract

A maleic anhydride removing device suitable for an online analyzer relates to a maleic anhydride removing device, and is characterized in that a filter is arranged in the center of a cavity (4), one end of a steam pipe (8) and one end of a medium air inlet pipe (9) extend into the cavity (4) and are connected with the inlet end of a jet pump (6), and one end of a converging air pipe (24) is connected with the outlet end of the jet pump (6); the other end of the converging air pipe (24) extends into the lower portion of the inner cavity (19) along the top of the shell (17), one end of the air outlet pipe (7) penetrates through the box body (1) and extends into the upper portion of the inner cavity (19) along the top of the shell (17), and a heating mechanism and a cooling mechanism are further arranged in the box body (1). According to the utility model, the filter is arranged in the box body, the heater is arranged in the box body, and the compressed air inlet pipe and the compressed air outlet pipe are connected to the clamping cavity of the filter, so that the aim of effectively separating maleic anhydride is fulfilled by heating the heater and cooling the compressed air inlet pipe after a medium containing maleic anhydride is mixed with steam.

Description

Technical Field

[0001] The utility model relates to a maleic anhydride removal device, in particular to a maleic anhydride removal device suitable for an online analyzer. Background Art

[0002] Domestic maleic anhydride production capacity continues to grow, and the increase in butane-process maleic anhydride is still the main source. The outlet of the reactor of the butane-process maleic anhydride unit must be tested by an infrared analyzer to detect the concentrations of n-butane, CO2, and CO, and the failure rate is relatively high. The reactor outlet temperature is around 180°C, and maleic anhydride is in a gaseous state under this operating condition. The operating temperature of the infrared analyzer is 50-60°C. In order to ensure the normal operation of the analyzer, the medium temperature needs to be cooled to below 50°C. According to the physical and chemical properties of maleic anhydride, maleic anhydride is easy to solidify into a solid state, causing blockage of pre-treated pipes and valves. The utility model uses precise temperature control to fully separate maleic anhydride in the liquid state, remove maleic anhydride in the gaseous medium, and ensure that the operation of the analyzer is not interfered by maleic anhydride. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model discloses a maleic anhydride removal device suitable for an online analyzer, by arranging a filter in a box body, arranging a heater in the box body, connecting a compressed air inlet pipe and a compressed air outlet pipe in the clamping cavity of the filter, and after the medium containing maleic anhydride and steam are mixed, the heater is used to increase the temperature and the compressed air inlet pipe is used to reduce the temperature to achieve the purpose of effectively separating the maleic anhydride.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A maleic anhydride removal device suitable for an online analyzer comprises a box body, a cavity is arranged in the box body, a filter is arranged in the center of the cavity, the filter comprises an outer shell, an inner tank is arranged in the outer shell, a clamping cavity is arranged between the outer shell and the inner tank, an inner cavity is arranged in the inner tank, a jet pump is also arranged in the cavity, one end of a steam pipe and one end of a medium air inlet pipe are both extended into the cavity and connected to the inlet end of the jet pump, one end of a merging air pipe is connected to the outlet end of the jet pump, the other end of the merging air pipe is extended into the lower part of the inner cavity along the top of the outer shell, one end of an air outlet pipe passes through the box body and extends into the upper part of the inner cavity along the top of the outer shell, and a heating mechanism and a cooling mechanism are also arranged in the box body.

[0006] The maleic anhydride removal device suitable for online analyzers comprises a heating mechanism including a heater, the heater is arranged in a cavity, a temperature controller A is connected to the heater via an electric wire, a detection head of a temperature detector A extends into the cavity, and the temperature controller A is connected to the temperature detector A via a data line A.

[0007] The maleic anhydride removal device suitable for the online analyzer is provided with a junction box on the box body, one end of the junction box extends into the cavity and is connected to the heater, and the other end of the junction box is connected to one end of the wire.

[0008] The maleic anhydride removal device suitable for the online analyzer has a line voltage of 220V.

[0009] The maleic anhydride removal device suitable for online analyzers, the cooling mechanism includes a compressed air inlet pipe and a compressed air outlet pipe, one end of the compressed air inlet pipe and one end of the compressed air outlet pipe both pass through the box body and extend into the clamping cavity, the detection head of the temperature detector B passes through the box body and the outer shell and extends into the inner cavity, an electromagnetic valve is provided on the compressed air inlet pipe, the temperature controller B is connected to the temperature detector B through a data line B, and the temperature controller B is connected to the electromagnetic valve through a data line C.

[0010] The maleic anhydride removal device suitable for the online analyzer is provided with a heat-insulating layer inside the box shell.

[0011] The maleic anhydride removal device suitable for the online analyzer is provided with a liquid storage tank penetrating the inner cavity at the bottom of the shell, and a sewage discharge pipe extending out of the box body is provided at the bottom of the liquid storage tank.

[0012] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0013] The utility model is suitable for the maleic anhydride removal device of the online analyzer, by arranging a filter in the box body, arranging a heater in the box body, connecting the compressed air inlet pipe and the compressed air outlet pipe in the filter cavity, and after the medium containing maleic anhydride and steam are mixed, the heater is used to increase the temperature and the compressed air inlet pipe is used to reduce the temperature to achieve the purpose of effectively separating the maleic anhydride; the utility model has a compact and reasonable structure, good separation effect, low cost, energy saving and consumption reduction, effectively increases the purity of the medium, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] In the figure: 1. box body; 101. insulation layer; 2. heater; 3. temperature controller A; 4. cavity; 5. temperature detector A; 6. jet pump; 7. outlet pipe; 8. steam pipe; 9. medium inlet pipe; 10. compressed air outlet pipe; 11. compressed air inlet pipe; 12. solenoid valve; 13. liquid storage tank; 14. temperature detector B; 15. sewage discharge pipe; 16. temperature controller B; 17. outer shell; 18. clamping cavity; 19. inner cavity; 20. inner tank; 21. junction box; 22. electric wire; 23. data cable A; 24. converging air pipe; 25. data cable B; 26. data cable C. DETAILED DESCRIPTION

[0016] The present invention can be explained in more detail through the following embodiments. The present invention is not limited to the following embodiments. The purpose of disclosing the present invention is to protect all changes and improvements within the scope of the present invention.

[0017] Combined with Figure 1 The maleic anhydride removal device suitable for online analyzers, a maleic anhydride removal device suitable for online analyzers, comprises a box body 1, a cavity 4 is arranged in the box body 1, a filter is arranged in the center of the cavity 4, the filter comprises an outer shell 17, an inner tank 20 is arranged in the outer shell 17, a clamping cavity 18 is arranged between the outer shell 17 and the inner tank 20, an inner cavity 19 is arranged in the inner tank 20, a jet pump 6 is also arranged in the cavity 4, one end of the steam pipe 8 and one end of the medium inlet pipe 9 are both extended into the cavity 4 and the jet pump 6 The inlet end is connected, one end of the converging air pipe 24 is connected to the outlet end of the jet pump 6, the other end of the converging air pipe 24 extends into the lower part of the inner cavity 19 along the top of the shell 17, one end of the outlet pipe 7 passes through the box body 1 and extends into the upper part of the inner cavity 19 along the top of the shell 17. A heating mechanism and a cooling mechanism are also provided in the box body 1. The heating mechanism includes a heater 2, and the heater 2 is arranged in the cavity 4. The temperature controller A3 is connected to the heater 2 through the wire 22, and the detection head of the temperature detector A5 extends into the cavity 4, the temperature controller A3 is connected to the temperature detector A5 through the data line A23, a junction box 21 is provided on the box body 1, one end of the junction box 21 extends into the cavity 4 and is connected to the heater 2, the other end of the junction box 21 is connected to one end of the wire 22, the line voltage of the wire 22 is 220V, the cooling mechanism includes a compressed air inlet pipe 11 and a compressed air outlet pipe 10, one end of the compressed air inlet pipe 11 and one end of the compressed air outlet pipe 10 both pass through the box body 1 and extend into the clamping cavity 18, the temperature detector The detection head of the detector B14 passes through the box body 1 and the outer shell 17 and extends into the inner cavity 19. A solenoid valve 12 is provided on the compressed air inlet pipe 11. The temperature controller B16 is connected to the temperature detector B14 through a data line B25. The temperature controller B16 is connected to the solenoid valve 12 through a data line C26. An insulation layer 101 is provided inside the box shell of the box body 1. A liquid storage tank 13 that passes through the inner cavity 19 is provided at the bottom of the outer shell 17. A sewage discharge pipe 15 that extends out of the box body 1 is provided at the bottom of the liquid storage tank 13.

[0018] Implement the maleic anhydride removal device suitable for online analyzer described in the utility model, connect the temperature controller A3 and the temperature controller B16 to the power switch respectively, connect the air outlet pipe 7 to the finished gas storage tank, connect the steam pipe 8 to the steam generating device, connect the medium air inlet pipe 9 to the medium storage tank, connect the compressed air inlet pipe 11 to the compressed air preparation device, and connect the sewage discharge pipe 15 to the sewage collection tank;

[0019] The medium mixed with maleic anhydride enters the jet pump 6 from the medium inlet pipe 9, and the hot steam enters the jet pump 6 from the steam pipe 8. The medium mixed with maleic anhydride and the hot steam are mixed and enter the inner cavity 19 from the confluent air pipe 24.

[0020] At a suitable temperature in the inner cavity 19, maleic anhydride is liquefied and retained at the bottom of the inner cavity 19 and enters the liquid storage tank 13 and then discharged to the sewage collection tank through the sewage discharge pipe 15. The unliquefied medium is extracted from the gas outlet pipe 7 to the medium storage tank;

[0021] When the temperature in the inner cavity 19 is lower than the temperature at which maleic anhydride is separated, part of the medium will be liquefied and mixed in the liquefied maleic anhydride, and enter the liquid storage tank 13, resulting in a waste of the medium. At this time, the temperature detector A5 detects that the temperature value in the cavity 4 is lower than the normal temperature value, and the temperature controller A3 controls the heater 2 to heat the cavity 4 until the temperature in the cavity 4 drives the temperature in the inner cavity 19 to reach the normal value, and then turns off the heater 2.

[0022] When the temperature in the inner cavity 19 is higher than the temperature at which maleic anhydride is separated, part of the maleic anhydride will not be liquefied, and the gaseous maleic anhydride will be mixed in the gaseous medium and extracted from the air outlet pipe 7 to the finished gas storage tank, resulting in the low purity of the extracted medium. Because the infrared analyzer needs to reduce the temperature to about 50 degrees when detecting the medium, when the infrared analyzer detects the medium, the maleic anhydride in the mixture of the medium with reduced temperature is solidified at low temperature in the pretreated pipe valve parts, and the solidified maleic anhydride blocks the pipe valve parts. At this time, the temperature detector B14 detects that the temperature in the inner cavity 19 is higher than the normal temperature value, and the temperature controller B16 controls the solenoid valve 12 to open. The compressed air prepared by the compressed air preparation device enters the clamping cavity 18 from the compressed air inlet pipe 11 to cool the inner cavity 19. The compressed air entering the clamping cavity 18 is discharged from the compressed air outlet pipe 10, forming a compressed air circulation until the temperature in the inner cavity 19 reaches the normal value and the solenoid valve 12 is closed.

[0023] The parts not described in detail in this utility model are prior art.

Claims

1. A maleic anhydride removal device suitable for an online analyzer, characterized in that: The invention comprises a housing (1), a cavity (4) is provided in the housing (1), a filter is provided at the center of the cavity (4), the filter comprises an outer shell (17), an inner tank (20) is provided in the outer shell (17), a clamping cavity (18) is provided between the outer shell (17) and the inner tank (20), an inner cavity (19) is provided in the inner tank (20), a jet pump (6) is also provided in the cavity (4), one end of a steam pipe (8) and one end of a medium air inlet pipe (9) both extend into the cavity (4) and are connected to the inlet end of the jet pump (6), one end of a merging air pipe (24) is connected to the outlet end of the jet pump (6), the other end of the merging air pipe (24) extends along the top of the outer shell (17) into the lower part of the inner cavity (19), one end of an air outlet pipe (7) passes through the housing (1) and extends along the top of the outer shell (17) into the upper part of the inner cavity (19), and a heating mechanism and a cooling mechanism are also provided in the housing (1).

2. The maleic anhydride removal device suitable for online analyzer according to claim 1, characterized in that: The temperature raising mechanism comprises a heater (2), the heater (2) being arranged in a cavity (4), a temperature controller A (3) being connected to the heater (2) via an electric wire (22), a detection head of a temperature detector A (5) extending into the cavity (4), and the temperature controller A (3) being connected to the temperature detector A (5) via a data wire A (23).

3. The maleic anhydride removal device applicable to the online analyzer according to claim 2, characterized in that: A junction box (21) is provided on the box body (1), one end of the junction box (21) extends into the cavity (4) and is connected to the heater (2), and the other end of the junction box (21) is connected to one end of the electric wire (22).

4. The maleic anhydride removal device suitable for online analyzer according to claim 2, characterized in that: The line voltage of the electrical wire (22) is 220V.

5. The maleic anhydride removal device suitable for online analyzer according to claim 1 is characterized in that: The cooling mechanism comprises a compressed air inlet pipe (11) and a compressed air outlet pipe (10), one end of the compressed air inlet pipe (11) and one end of the compressed air outlet pipe (10) both pass through the box body (1) and extend into the clamping cavity (18), a detection head of a temperature detector B (14) passes through the box body (1) and the outer shell (17) and extends into the inner cavity (19), a solenoid valve (12) is provided on the compressed air inlet pipe (11), a temperature controller B (16) is connected to the temperature detector B (14) via a data line B (25), and the temperature controller B (16) is connected to the solenoid valve (12) via a data line C (26).

6. The maleic anhydride removal device suitable for online analyzer according to claim 1 is characterized in that: A heat-insulating layer (101) is provided inside the box shell of the box body (1).

7. The maleic anhydride removal device suitable for online analyzer according to claim 1 is characterized in that: A liquid storage tank (13) penetrating the inner cavity (19) is provided at the bottom of the outer shell (17), and a sewage discharge pipe (15) extending out of the box body (1) is provided at the bottom of the liquid storage tank (13).

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