Tail gas recovery device for polyolefin system

Abstract

The utility model relates to a polyolefin system tail gas recovery device which comprises a gas bag filter, the gas bag filter is communicated with a filtered gas pipeline, the other end of the filtered gas pipeline is communicated with a filter, one end of the filter is connected with a tail gas recovery pipeline, and the other end of the tail gas recovery pipeline is connected with a tail gas recovery compressor. One end of the tail gas recovery compressor is communicated with the reaction system pipeline, and the other end of the reaction system pipeline is connected to the reaction system; one part, close to the filter, of the tail gas recovery pipeline is communicated with a reaction gas recovery pipeline, the reaction gas recovery pipeline is communicated with an MTO device reaction gas pipeline, one end of the MTO device reaction gas pipeline is communicated with an MTO device, the other end of the MTO device reaction gas pipeline is communicated with a reaction gas compressor, and the other end of the reaction gas compressor is connected with a separation system; by means of the tail gas recovery technology, recovery of tail gas of the powder conveying system during maintenance of the compressor is achieved, and the problems of economic loss and environmental pollution caused by the fact that the tail gas is discharged into a torch are avoided.

Description

Technical Field

[0001] The utility model relates to a tail gas recovery device, in particular to a tail gas recovery device for a polyolefin system. Background Art

[0002] At present, the tail gas of the polyolefin powder conveying system is filtered, compressed and then returned to the reaction system for recycling. Traditional polyolefin devices usually produce a large amount of gaseous waste, which may pollute the surrounding environment and bring risks to the ecological environment. In addition, the compressor in the polyolefin device is frequently overhauled. During the overhaul, the tail gas of the powder conveying system is discharged to the torch, resulting in energy waste and economic losses.

[0003] Therefore, there is an urgent need for a tail gas recovery device for a polyolefin system. Through the tail gas recovery technology, the tail gas of the powder conveying system can be recovered during the compressor maintenance, avoiding the tail gas from being discharged into the torch, causing economic losses and environmental pollution. Summary of the invention

[0004] A tail gas recovery device for a polyolefin system realizes the recovery of tail gas from a powder conveying system during compressor maintenance through tail gas recovery technology, thereby avoiding the discharge of tail gas into a flare, causing economic losses and environmental pollution.

[0005] A tail gas recovery device for a polyolefin system, comprising a gas bag filter, wherein:

[0006] The gas bag filter is connected to the filter gas pipeline, the other end of the filter gas pipeline is connected to the filter, one end of the filter is connected to the tail gas recovery pipeline, the other end of the tail gas recovery pipeline is connected to the tail gas recovery compressor, one end of the tail gas recovery compressor is connected to the reaction system pipeline, and the other end of the reaction system pipeline is connected to the reaction system;

[0007] The tail gas recovery pipeline is connected to the reaction gas recovery pipeline near the filter, and the reaction gas recovery pipeline is connected to the MTO device reaction gas pipeline. One end of the MTO device reaction gas pipeline is connected to the MTO device, and the other end is connected to the reaction gas compressor. The other end of the reaction gas compressor is connected to the separation system.

[0008] Preferably, the number of filters provided is two, and a filter connecting pipe is provided between a pair of filters.

[0009] Preferably, a tail gas inlet buffer tank is provided on one side of the tail gas recovery compressor close to the filter, and a tail gas outlet buffer tank is provided on the other side of the tail gas recovery compressor.

[0010] Preferably, the reaction gas recovery pipeline is provided with a plurality of valves.

[0011] Preferably, a driving motor is provided under the tail gas recovery compressor.

[0012] Preferably, a steam turbine driven compressor is provided below the reaction gas compressor.

[0013] The beneficial effects of the utility model are as follows: by recycling tail gas, the demand for energy can be reduced, energy consumption can be saved, and it is beneficial to environmental protection; the tail gas recovery device can help to utilize the waste gas resources, improve resource utilization efficiency, reduce waste, reduce the operating costs of the enterprise, reduce the treatment costs of waste gas emissions, improve production efficiency, improve economic benefits, and can reduce production costs and improve the sustainability of production, greatly enhancing its practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a tail gas recovery device for a polyolefin system according to the utility model.

[0015] In the figure: gas bag filter 1, filtered gas pipeline 2, filter 3, tail gas recovery pipeline 4, tail gas recovery compressor 5, reaction system pipeline 6, reaction system 7, reaction gas recovery pipeline 8, MTO device 9, reaction gas compressor 10, separation system 11, filter connecting pipeline 12, tail gas inlet buffer tank 13, tail gas outlet buffer tank 14, MTO device reaction gas pipeline 15. DETAILED DESCRIPTION

[0016] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model is now clearly and completely described in the form of specific embodiments in combination with the accompanying drawings.

[0017] Embodiment 1:

[0018] like Figure 1 As shown, in this embodiment Figure 1 The utility model is a polyolefin system tail gas recovery device, comprising a gas bag filter 1, wherein:

[0019] The gas bag filter 1 is connected to the filter gas pipeline 2, the other end of the filter gas pipeline 2 is connected to the filter 3, one end of the filter 3 is connected to the tail gas recovery pipeline 4, the other end of the tail gas recovery pipeline 4 is connected to the tail gas recovery compressor 5, one end of the tail gas recovery compressor 5 is connected to the reaction system pipeline 6, and the other end of the reaction system pipeline 6 is connected to the reaction system 7;

[0020] The tail gas recovery pipeline 4 is connected to the reaction gas recovery pipeline 8 near the filter 3, and the reaction gas recovery pipeline 8 is connected to the MTO device reaction gas pipeline 15. One end of the MTO device reaction gas pipeline 15 is connected to the MTO device 9, and the other end is connected to the reaction gas compressor 10. The other end of the reaction gas compressor 10 is connected to the separation system 11.

[0021] The number of filters 3 is two, and a filter connecting pipe 12 is disposed between a pair of filters 3 .

[0022] A tail gas inlet buffer tank 13 is provided on one side of the tail gas recovery compressor 5 close to the filter 3 , and a tail gas outlet buffer tank 14 is provided on the other side of the tail gas recovery compressor 5 .

[0023] The reaction gas recovery pipeline 8 is provided with a plurality of valves.

[0024] A driving motor is provided under the tail gas recovery compressor 5 .

[0025] A steam turbine driven compressor is disposed under the reaction gas compressor 10 .

[0026] When the device is in use, the material is transported to the gas bag filter 1, enters the tail gas recovery compressor 5 through the filter 3, and is transported to the reaction system 7 after the tail gas recovery is completed; when the tail gas recovery compressor 5 is under maintenance, the tail gas will enter the reaction gas compressor 10 through the reaction gas recovery pipeline 8, and finally output to the separation system 11 for separation and use. The device connects a filter connecting pipeline 12 in a group of filters 3. According to specific production needs, a group of filters 3 can be used in parallel or individually. Two filters 3 are arranged in parallel and a filter connecting pipeline 12 is provided between the two filters 3. The filters 3 can be selected to work simultaneously or one at a time.

[0027] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A polyolefin system tail gas recovery device, characterized in that: It comprises a gas bag filter (1), wherein: The gas bag filter (1) is connected to a filter gas pipeline (2), the other end of the filter gas pipeline (2) is connected to a filter (3), one end of the filter (3) is connected to an exhaust gas recovery pipeline (4), the other end of the exhaust gas recovery pipeline (4) is connected to an exhaust gas recovery compressor (5), one end of the exhaust gas recovery compressor (5) is connected to a reaction system pipeline (6), and the other end of the reaction system pipeline (6) is connected to a reaction system (7); The tail gas recovery pipeline (4) is connected to a reaction gas recovery pipeline (8) near the filter (3), and the reaction gas recovery pipeline (8) is connected to an MTO device reaction gas pipeline (15). One end of the MTO device reaction gas pipeline (15) is connected to the MTO device (9), and the other end is connected to a reaction gas compressor (10). The other end of the reaction gas compressor (10) is connected to a separation system (11).

2. A polyolefin system tail gas recovery device as claimed in claim 1, characterized in that: The number of filters (3) is two, and a filter communication pipe (12) is provided between a pair of filters (3).

3. A polyolefin system tail gas recovery device as claimed in claim 1, characterized in that: A tail gas inlet buffer tank (13) is provided on one side of the tail gas recovery compressor (5) close to the filter (3), and a tail gas outlet buffer tank (14) is provided on the other side of the tail gas recovery compressor (5).

4. A polyolefin system tail gas recovery device as claimed in claim 1, characterized in that: The reaction gas recovery pipeline (8) is provided with a plurality of valves.

5. A polyolefin system tail gas recovery device as claimed in claim 1, characterized in that: A driving motor is provided under the tail gas recovery compressor (5).

6. A polyolefin system tail gas recovery device as claimed in claim 1, characterized in that: A steam turbine driven compressor is arranged below the reaction gas compressor (10).

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