Tail gas collecting device for phthalic anhydride storage tank

Abstract

The utility model discloses a tail gas collecting device of a phthalic anhydride storage tank. The tail gas collecting device comprises a heat exchange mechanism, a dust filtering mechanism and a flow guide mechanism, the heat exchange mechanism comprises a first cavity and a heat exchange device, the heat exchange device comprises a plurality of heat exchange flow layers, a plurality of heat exchange gaps are formed between the heat exchange flow layers, and when tail gas in the first cavity flows along the heat exchange flow layers and enters the heat exchange gaps to form turbulent flow, the tail gas exchanges heat with the heat exchange device; the dust filtering mechanism comprises a second chamber, a filter cartridge device and a rotary driving device, a gas filtering cavity is formed in the filter cartridge device, a plurality of groups of dust filtering through holes are formed in the filter cartridge device and penetrate through the filter cartridge device and are communicated with the gas filtering cavity, and when the filter cartridge device rotates to generate negative pressure in the gas filtering cavity, separated tail gas is discharged through the gas filtering cavity; the dust is retained on the inner and outer surfaces of the filter cartridge device through the dust filtering through holes to be collected; the flow guide mechanism comprises an airflow channel, and the airflow channel communicates with the first cavity and the second cavity. The utility model solves the problem of intercepting condensed tail gas crystallization dust, and avoids the influence of dust blockage on the subsequent treatment process.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas collection technical field, concretely relates to a kind of phthalic anhydride storage tank tail gas collection device. BACKGROUND

[0002] The storage temperature of phthalic anhydride storage tank is 150 DEG C, and part of it is volatilized into gaseous state and discharged during the receiving and transmitting operation.When tail gas collection pipeline drops with gas temperature, these vapors can condense into solid particles, i.e.dust, which can easily block the pipeline or subsequent devices, and there are big operation problems. SUMMARY

[0003] In order to overcome the above technical problems, the utility model discloses a kind of phthalic anhydride storage tank tail gas collection device.

[0004] The utility model discloses the technical scheme that the above-mentioned purpose is achieved is:

[0005] A kind of phthalic anhydride storage tank tail gas collection device, it includes heat exchange mechanism and filter dust mechanism, the heat exchange mechanism and filter dust mechanism are communicated by flow guide mechanism between;

[0006] The heat exchange mechanism includes first chamber, and heat exchange device that is arranged in the first chamber, the heat exchange device includes several groups of heat exchange flow layer, several heat exchange gaps are provided between each heat exchange flow layer, when the tail gas in the first chamber is along the heat exchange flow layer laminar flow and enters the heat exchange gap and forms turbulent flow, it exchanges heat with the heat exchange device;

[0007] The filter dust mechanism includes second chamber, filter cartridge device that is arranged in the second chamber, and rotation driver device for driving the filter cartridge device to rotate, the filter cartridge device is arranged with filter gas cavity, several groups of filter dust through-hole are arranged through the filter cartridge device and are communicated with the filter gas cavity, when the filter cartridge device rotates and makes the filter gas cavity generate negative pressure, the tail gas in the second chamber is separated and discharged through the filter gas cavity, so that dust is retained on the inner and outer surfaces of the filter cartridge device and collected through the filter dust through-hole;

[0008] The flow guide mechanism includes airflow passage, and the airflow passage is communicated with the first chamber and the second chamber.

[0009] The above-mentioned phthalic anhydride storage tank tail gas collection device, wherein heat exchange gas inlet, heat exchange gas outlet are arranged at the upper and lower ends of the first chamber respectively, the heat exchange gas inlet and the heat exchange gas outlet are communicated with the first chamber, and the heat exchange gas outlet is communicated with the airflow passage.

[0010] The phthalic anhydride storage tank tail gas collecting device, wherein a dust filtering gas inlet and a dust filtering gas outlet are arranged at the lower end and the upper end of the second chamber respectively, the dust filtering gas inlet is communicated with the second chamber, the dust filtering gas outlet is communicated with the filter chamber, and the dust filtering gas inlet is communicated with the airflow channel.

[0011] The phthalic anhydride storage tank tail gas collecting device, wherein the heat exchange gas inlet, the first chamber, the heat exchange gas outlet, the airflow channel, the dust filtering gas inlet, the second chamber, the filter chamber and the dust filtering gas outlet are sequentially communicated to form a tail gas heat exchange and dust filtering path.

[0012] The phthalic anhydride storage tank tail gas collecting device, wherein a gas guide cylinder is arranged at the top end of the second chamber, and the gas guide cylinder is communicated with the filter chamber and the dust filtering gas outlet.

[0013] The phthalic anhydride storage tank tail gas collecting device, wherein a slag discharge door is arranged at the lower end of the first chamber, and a maintenance door is arranged at the second chamber.

[0014] The phthalic anhydride storage tank tail gas collecting device, wherein the heat exchange device comprises an inlet pipe and an outlet pipe, and a plurality of groups of heat exchange groups are arranged at intervals between the inlet pipe and the outlet pipe, and the heat exchange flow layers are formed between adjacent heat exchange groups.

[0015] The phthalic anhydride storage tank tail gas collecting device, wherein the heat exchange group comprises a first connecting pipe and a second connecting pipe, the first connecting pipe is arranged in communication with the inlet pipe, and the second connecting pipe is arranged in communication with the outlet pipe.

[0016] A plurality of groups of heat exchange pipes are arranged at intervals between the first connecting pipe and the second connecting pipe, and the heat exchange gaps are formed between adjacent heat exchange pipes.

[0017] The phthalic anhydride storage tank tail gas collecting device, wherein the liquid flow direction of the inlet pipe is perpendicular to the liquid flow direction of the first connecting pipe, the liquid flow direction of the first connecting pipe is perpendicular to the liquid flow direction of the heat exchange pipe, the liquid flow direction of the heat exchange pipe is perpendicular to the liquid flow direction of the second connecting pipe, and the liquid flow direction of the second connecting pipe is perpendicular to the liquid flow direction of the outlet pipe.

[0018] The phthalic anhydride storage tank tail gas collecting device, wherein the liquid inlet of the inlet pipe is arranged at the lower end of the first chamber, the liquid outlet of the outlet pipe is arranged at the upper end of the first chamber, and the liquid flow direction of the inlet pipe is opposite to the liquid flow direction of the outlet pipe.

[0019] The utility model discloses a beneficial effect is: the utility model discloses reasonable and ingenious, cooperate and set up heat exchange mechanism and filter dust mechanism, make the temperature of tail gas reduce fast, and the dust produced by condensation is intercepted, and the gas after purification is discharged, effectively solve the problem of intercepting condensation tail gas crystalline dust, avoid the dust and influence the follow -up processing technology because of the blockage, wherein, the heat exchange device promotes tail gas along the heat exchange flow laminar flow and enters the heat exchange gap and forms turbulent flow to effectively improve the heat exchange efficiency, avoid the emergence of heat exchange blind area, and the filter cartridge device can effectively intercept the dust, make the dust through filter dust through -hole and stay in the inner and outer surface collection of filter cartridge device, and can separate and purify tail gas and discharge through filter gas cavity. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model is further explained below in combination with the drawings and examples.

[0021] Fig. 1 It is the structure three -dimensional schematic view of the utility model;

[0022] Fig. 2 It is the sectional view schematic view of the utility model;

[0023] Fig. 3 It is the three -dimensional schematic view of heat exchange device in the utility model;

[0024] Fig. 4 It is the three -dimensional schematic view of filter cartridge device in the utility model. DETAILED DESCRIPTION

[0025] The utility model is further explained below through specific examples to make the technical scheme of the utility model more easily understood, mastered, and not limit the utility model.

[0026] Example: see Figs. 1 to 4 The utility model discloses a kind of phthalic anhydride storage tank tail gas collecting device provided in the embodiment, it includes heat exchange mechanism 1 and filter dust mechanism 2, the heat exchange mechanism 1 and filter dust mechanism 2 are communicated by flow guide mechanism 3 between them;

[0027] The heat exchange mechanism 1 includes first chamber, and heat exchange device 11 in the first chamber, the heat exchange device 11 includes several groups of heat exchange flow layer, several heat exchange gaps are provided between each heat exchange flow layer, when tail gas in the first chamber along the heat exchange flow laminar flow and enters the heat exchange gap and forms turbulent flow, it exchanges heat with the heat exchange device 11;

[0028] The dust filtering mechanism 2 comprises a second chamber, a filter cartridge device 21 arranged in the second chamber, and a rotating driving device for driving the filter cartridge device 21 to rotate, the filter cartridge device 21 is internally provided with a filter cavity, a plurality of groups of dust filtering through holes 211 are arranged through the filter cartridge device 21 and communicate with the filter cavity, when the filter cartridge device 21 rotates to generate negative pressure in the filter cavity, the tail gas in the second chamber is separated and discharged through the filter cavity, and the dust is retained on the inner and outer surfaces of the filter cartridge device 21 through the dust filtering through holes 211; the rotating driving device is preferably but not limited to a motor;

[0029] The flow guiding mechanism 3 comprises a gas flow channel, the gas flow channel communicates the first chamber and the second chamber, and the gas flow channel is used for buffering the tail gas flowing out of the first chamber to avoid that the tail gas flow pressure is too large to affect the dust filtering effect of the dust filtering mechanism 2.

[0030] Specifically, the heat exchange mechanism 1 and the dust filtering mechanism 2 are arranged in cooperation, so that the temperature of the tail gas is rapidly reduced, the dust generated by condensation is intercepted, and the purified gas is discharged, effectively solving the problem of intercepting and crystallizing the dust of the condensed tail gas, and avoiding that the dust affects the subsequent processing process due to blockage; wherein the heat exchange device 11 promotes the tail gas to flow along the heat exchange flow layer and enter the heat exchange gap to form turbulent flow, thereby effectively improving the heat exchange efficiency and avoiding the occurrence of heat exchange blind area, and the filter cartridge device 21 can not only effectively intercept the dust, so that the dust is retained on the inner and outer surfaces of the filter cartridge device 21 through the dust filtering through holes 211, but also separate and purify the tail gas to be discharged through the filter cavity.

[0031] Preferably, a heat exchange gas inlet 12 and a heat exchange gas outlet are arranged at the upper and lower ends of the first chamber respectively, the heat exchange gas inlet 12 and the heat exchange gas outlet communicate with the first chamber, and the heat exchange gas outlet communicates with the gas flow channel; specifically, the heat exchange gas inlet 12 is used for introducing the phthalic anhydride storage tank tail gas into the first chamber, and the heat exchange gas outlet is used for introducing the cooled tail gas into the gas flow channel.

[0032] Preferably, a dust filtering gas inlet and a dust filtering gas outlet 22 are arranged at the lower and upper ends of the second chamber respectively, the dust filtering gas inlet communicates with the second chamber, the dust filtering gas outlet 22 communicates with the filter cavity, and the dust filtering gas inlet communicates with the gas flow channel; specifically, the dust filtering gas inlet is used for introducing the cooled and buffered tail gas into the second chamber, and the dust filtering gas outlet 22 is used for discharging the gas with intercepted dust.

[0033] Preferably, the heat exchange gas inlet 12, the first chamber, the heat exchange gas outlet, the gas flow channel, the dust filtering gas inlet, the second chamber, the filter cavity, and the dust filtering gas outlet 22 sequentially communicate to form a tail gas heat exchange and dust filtering path.

[0034] Further, a gas guide cylinder 212 is arranged at the top end of the second chamber, which communicates the filter cavity and the filter dust outlet 22. Since the filter cylinder device 21 rotates to cause the filtered dust gas to flow in the filter cavity, the gas guide cylinder 212 is used for guiding the filtered dust gas to be discharged.

[0035] Further, a slag discharge door 13 is arranged at the lower end of the first chamber, which is used for opening and cleaning the dust condensed and crystallized by the exhaust gas.

[0036] A maintenance door 23 is arranged at the second chamber, which is used for opening and cleaning the filter cylinder device 21.

[0037] Preferably, the heat exchange device 11 comprises an inlet pipe 111 and an outlet pipe 112, and a plurality of groups of heat exchange groups are arranged at intervals between the inlet pipe 111 and the outlet pipe 112, and the heat exchange flow layers are formed between adjacent heat exchange groups.

[0038] The heat exchange group comprises a first connecting pipe 113 and a second connecting pipe 114, and the first connecting pipe 113 is arranged in communication with the inlet pipe 111, and the second connecting pipe 114 is arranged in communication with the outlet pipe 112.

[0039] A plurality of groups of heat exchange pipes 115 are arranged at intervals between the first connecting pipe 113 and the second connecting pipe 114, and the heat exchange gaps are formed between adjacent heat exchange pipes 115.

[0040] Specifically, the heat exchange device 11 is filled with heat exchange fluid, and the exhaust gas to be cooled flows along the heat exchange flow layer and collides with the heat exchange pipes 115, forming a higher degree of turbulence in the heat exchange gap, thereby realizing heat exchange and effectively improving heat exchange efficiency and avoiding the occurrence of heat exchange blind area.

[0041] Specifically, the liquid flow direction of the inlet pipe 111 is perpendicular to the liquid flow direction of the first connecting pipe 113, the liquid flow direction of the first connecting pipe 113 is perpendicular to the liquid flow direction of the heat exchange pipe 115, the liquid flow direction of the heat exchange pipe 115 is perpendicular to the liquid flow direction of the second connecting pipe 114, and the liquid flow direction of the second connecting pipe 114 is perpendicular to the liquid flow direction of the outlet pipe 112.

[0042] Specifically, the inlet of the inlet pipe 111 is arranged at the lower end of the first chamber, the outlet of the outlet pipe 112 is arranged at the upper end of the first chamber, and the liquid flow direction of the inlet pipe 111 is opposite to the liquid flow direction of the outlet pipe 112.

[0043] The utility model discloses a cooling device for phthalic anhydride tail gas, comprising a heat exchange device and a filter device.

[0044] Step 1, phthalic anhydride tank tail gas is introduced into the first chamber, and the tail gas flows into the heat exchange flow layer and collides with the heat exchange pipe 115, and then forms a higher turbulence in the heat exchange gap, so as to realize the tail gas heat exchange operation.

[0045] The cooled tail gas enters the airflow channel, and the condensed and crystallized dust is discharged through the deslagging door 13.

[0046] Step 2, the cooled tail gas is introduced into the second chamber, the filter cartridge device 21 is rotated to generate negative pressure in the filter cavity, the tail gas is separated and purified and finally discharged through the filter cavity, and the dust is retained on the inner and outer surfaces of the filter cartridge device 21 to collect, so as to realize the tail gas dust filtering operation.

[0047] The utility model discloses a cooling device for phthalic anhydride tail gas, comprising a heat exchange device and a filter device.

[0048] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Any skilled person in the art can make many possible changes and modifications to the utility model technical scheme or modify equivalent embodiments without departing from the scope of the utility model technical scheme. Therefore, any equivalent change according to the shape, structure and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A device for collecting tail gas from a phthalic anhydride storage tank, characterized in that, It includes a heat exchange mechanism and a dust filtration mechanism, which are connected by a flow guiding mechanism; The heat exchange mechanism includes a first chamber and a heat exchange device disposed in the first chamber. The heat exchange device includes several sets of heat exchange flow layers, and several heat exchange gaps are provided between each heat exchange flow layer. When the exhaust gas in the first chamber flows laminarly along the heat exchange flow layer and enters the heat exchange gap to form turbulence, it exchanges heat with the heat exchange device. The dust filtration mechanism includes a second chamber, a filter cartridge device disposed in the second chamber, and a rotary drive device for driving the filter cartridge device to rotate. The filter cartridge device is provided with a filter chamber, and a plurality of dust filter holes are provided through the filter cartridge device and communicating with the filter chamber. When the filter cartridge device rotates, a negative pressure is generated in the filter chamber, and the exhaust gas in the second chamber is separated and discharged through the filter chamber, so that the dust is retained on the inner and outer surfaces of the filter cartridge device through the dust filter holes. The airflow guiding mechanism includes an airflow channel that connects the first chamber and the second chamber.

2. The phthalic anhydride storage tank tail gas collection device according to claim 1, characterized in that, A heat exchange inlet and a heat exchange outlet are respectively provided at the upper and lower ends of the first chamber. The heat exchange inlet and the heat exchange outlet are both connected to the first chamber, and the heat exchange outlet is connected to the airflow channel.

3. The phthalic anhydride storage tank tail gas collection device according to claim 2, characterized in that, A dust filter inlet and a dust filter outlet are respectively provided at the lower and upper ends of the second chamber. The dust filter inlet is connected to the second chamber, the dust filter outlet is connected to the filter chamber, and the dust filter inlet is connected to the airflow channel.

4. The phthalic anhydride storage tank tail gas collection device according to claim 3, characterized in that, The heat exchange inlet, first chamber, heat exchange outlet, airflow channel, dust filter inlet, second chamber, filter chamber, and dust filter outlet flow sequentially to form a tail gas heat exchange and dust filter path.

5. The phthalic anhydride storage tank tail gas collection device according to claim 4, characterized in that, An air guide tube is provided at the top of the second chamber, and the air guide tube connects the air filter chamber and the dust filter outlet.

6. The phthalic anhydride storage tank tail gas collection device according to claim 5, characterized in that, A slag discharge door is provided at the lower end of the first chamber, and an inspection door is provided in the second chamber.

7. The phthalic anhydride storage tank tail gas collection device according to claim 1, characterized in that, The heat exchange device includes an inlet pipe and an outlet pipe. Several heat exchange groups are connected between the inlet pipe and the outlet pipe at intervals, and the heat exchange flow layer is formed between adjacent heat exchange groups.

8. The phthalic anhydride storage tank tail gas collection device according to claim 7, characterized in that, The heat exchange assembly includes a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is connected to the liquid inlet pipe and the second connecting pipe is connected to the liquid outlet pipe; Several sets of heat exchange tubes are connected between the first connecting pipe and the second connecting pipe at intervals, and the heat exchange gap is formed between adjacent heat exchange tubes.

9. The phthalic anhydride storage tank tail gas collection device according to claim 8, characterized in that, The liquid flow direction of the inlet pipe is perpendicular to the liquid flow direction of the first connecting pipe, the liquid flow direction of the first connecting pipe is perpendicular to the liquid flow direction of the heat exchange pipe, the liquid flow direction of the heat exchange pipe is perpendicular to the liquid flow direction of the second connecting pipe, and the liquid flow direction of the second connecting pipe is perpendicular to the liquid flow direction of the outlet pipe.

10. The phthalic anhydride storage tank tail gas collection device according to claim 9, characterized in that, The inlet of the inlet pipe is located at the lower end of the first chamber, and the outlet of the outlet pipe is located at the upper end of the first chamber. The liquid flow direction of the inlet pipe is opposite to that of the outlet pipe.

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