Polyester workshop tail gas on-line condensing device

Abstract

The utility model discloses a polyester workshop tail gas on-line condensing device which comprises a tail gas condenser and a fan, the side face of the tail gas condenser is provided with a cooling water inlet, a cooling water outlet, a tail gas inlet and a tail gas outlet, the fan is provided with an air inlet and an air outlet, and the air inlet and the tail gas outlet are communicated through a stainless steel pipeline. A thermal resistance thermometer and an electric control valve are arranged at the outer end of the tail gas condenser, a self-rotating spraying mechanism is arranged in the tail gas condenser, the tail gas condenser comprises a spraying section, a condensation section and a condensation receiving section, the self-rotating spraying mechanism is installed in the spraying section, and the thermal resistance thermometer is installed between the air inlet and the tail gas outlet. According to the utility model, the tail gas condenser is matched with the fan, and the tail gas is condensed and dewatered before entering an outdoor pipeline from a polyester workshop, so that water vapor and gaseous ethylene glycol in the tail gas are condensed and refluxed in advance, and the probability of blockage of a transportation pipeline is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to an online condensation device for tail gas in a polyester workshop. Background Art

[0002] During the production process of polyester workshop, a large amount of waste gas containing organic gas and water vapor is generated. Most existing workshops only treat the tail gas through a stripping tower. Usually, the workshop tail gas is directly introduced into the stripping tower through an ejector pump.

[0003] Since the stripping tower is located near the heat transfer station and is far away from the polyester unit, the tail gas pipeline is also relatively long. In the long-distance pipeline, most of the water vapor and gaseous ethylene glycol of the tail gas will condense and form liquid. Therefore, there will be problems. In cold weather, water will freeze in the transportation pipeline and block the pipeline, and the condensate will form a liquid seal at the U-turn of the tail gas pipeline, causing the tail gas to be blocked. Therefore, an online condensation device for tail gas in a polyester workshop is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an online condensation device for tail gas in a polyester workshop, which has the advantages of good economic performance and anti-clogging, and solves the problem that the tail gas transportation pipeline in the machine workshop is easily blocked in the prior art.

[0005] To achieve the above object, the utility model provides the following technical solutions: an online condensation device for tail gas in a polyester workshop, comprising a tail gas condenser and a fan, wherein the side of the tail gas condenser is provided with a cooling water inlet, a cooling water outlet, a tail gas inlet and a tail gas outlet, the fan is provided with an air inlet and an air outlet, the air inlet and the tail gas outlet are connected through a stainless steel pipe, a thermal resistance thermometer and an electric regulating valve are provided at the outer end of the tail gas condenser, and a spin spray mechanism is provided inside the tail gas condenser;

[0006] The exhaust gas condenser includes a spray section, a condensation section and a condensation receiving section. The spin spray mechanism is installed in the spray section. The thermal resistance thermometer is installed between the air inlet and the exhaust gas outlet. The electric regulating valve is installed at the cooling water inlet. The electric regulating valve and the thermal resistance thermometer are electrically connected.

[0007] As a preferred online condensation device for tail gas from a polyester workshop of the utility model, heat exchange tubes are arranged in the condensation section, and a sewage outlet is arranged at the bottom of the condensation receiving section.

[0008] As a preferred online condensation device for exhaust gas from a polyester workshop of the utility model, the spin spray mechanism includes a water supply pipe, a connecting pipe and a spray head, a sleeve is provided on the connecting pipe, and the connecting pipe is rotatably connected to the water supply pipe through the sleeve.

[0009] As a preferred embodiment of the polyester workshop exhaust gas online condensation device of the utility model, the spray head is rotatably connected to the connecting pipe.

[0010] As a preferred online condensation device for exhaust gas from a polyester workshop of the utility model, the connecting pipe is an "L"-shaped structure, the bottom of the spray head is a conical structure, a spray hole is provided at the bottom of the spray head, and the spray hole is a spiral through hole.

[0011] As a preferred embodiment of the polyester workshop exhaust gas online condensation device of the utility model, a water baffle is provided on the inner end surface of the exhaust gas outlet.

[0012] As a preferred embodiment of the polyester workshop exhaust gas online condensation device of the utility model, a solenoid valve is provided on the water supply pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model cooperates with the exhaust condenser and the fan to condense and remove water from the exhaust gas before the exhaust gas leaves the polyester workshop and enters the outdoor pipeline, so that the water vapor and gaseous ethylene glycol in the exhaust gas are condensed and refluxed in advance, which greatly reduces the probability of blockage of the transportation pipeline. After the equipment is installed, it is combined with the DCS control system in the polyester production line to automatically control the spray interval time and the exhaust gas temperature, thereby improving the degree of automation in the workshop.

[0015] 2. The utility model arranges a self-spinning spray mechanism in the spray device to remove impurities from the tail gas and clean the heat exchange tubes at the same time. The spray head of the self-spinning spray mechanism rotates while revolving around the water supply pipe during the spraying process, so that the spray head can cover the entire heat exchange tubes without spraying the heat exchange tubes at the same time, thereby avoiding excessive drainage pressure in the heat exchange tubes, causing poor tail flow, and saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a pipeline connection process diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the tail gas condenser of the utility model;

[0018] Figure 3 This is a front view of the fan of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the self-spinning spray mechanism of the utility model.

[0020] In the figure: 1. exhaust gas condenser; 101. cooling water inlet; 102. cooling water outlet; 103. exhaust gas inlet; 104. exhaust gas outlet; 105. sewage outlet; 106. solenoid valve; 107. water baffle; 110. spray section; 120. condensation section; 121. heat exchange tubes; 130. condensation receiving section; 2. fan; 201. air inlet; 202. air outlet; 3. thermal resistance thermometer; 4. electric regulating valve; 5. spin spray mechanism; 510. water supply pipe; 520. connecting pipe; 521. sleeve; 530. spray head; 321. spray hole. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 4 , an online condensation device for tail gas in a polyester workshop, comprising a tail gas condenser 1 and a fan 2, a cooling water inlet 101, a cooling water outlet 102, a tail gas inlet 103 and a tail gas outlet 104 are arranged on the side of the tail gas condenser 1, an air inlet 201 and an air outlet 202 are arranged on the fan 2, the air inlet 201 and the tail gas outlet 104 are connected through a stainless steel pipe, a thermal resistance thermometer 3 and an electric regulating valve 4 are arranged at the outer end of the tail gas condenser 1, and a spin spray mechanism 5 is arranged inside the tail gas condenser 1;

[0022] The exhaust gas condenser 1 includes a spray section 110, a condensation section 120 and a condensation receiving section 130. The spin spray mechanism 5 is installed in the spray section 110. The thermal resistance thermometer 3 is installed between the air inlet 201 and the exhaust gas outlet 104. The electric regulating valve 4 is installed at the cooling water inlet 101. The electric regulating valve 4 and the thermal resistance thermometer 3 are electrically connected.

[0023] When the device is in use, first, the fan 2 is started to form a negative pressure in the tail gas condenser 1, and the tail gas from each layer of the polyester workshop is introduced into the tail gas condenser 1 through the air duct. The tail gas passes through the condensation section 120, and the water vapor and gaseous ethylene glycol in the tail gas are converted into condensate and discharged from the sewage outlet 105. The tail gas after the water vapor is removed is sent to the stripping tower through the fan 2, and the tail gas temperature is detected by the thermal resistance thermometer 3, thereby controlling the opening and closing degree of the electric regulating valve 4, adjusting the cooling water flow rate, and thus controlling the tail gas temperature. By controlling the intermittent start and stop of the solenoid valve 106, the spray head 530 sprays intermittently.

[0024] Furthermore, a heat exchange tube 121 is provided in the condensation section 120 , and a sewage outlet 105 is provided at the bottom of the condensation receiving section 130 .

[0025] When the exhaust gas passes through the heat exchange tubes 121, the water vapor and ethylene glycol in the exhaust gas condense and reflux and are discharged from the sewage outlet 105, so that they are discharged in advance before entering the long-distance pipeline to avoid condensation and freezing in the pipeline to block the pipeline.

[0026] Furthermore, the self-spinning spray mechanism 5 includes a water supply pipe 510 , a connecting pipe 520 and a spray head 530 . A sleeve 521 is provided on the connecting pipe 520 , and the connecting pipe 520 is rotatably connected to the water supply pipe 510 via the sleeve 521 .

[0027] The spray head 530 can revolve around the water supply pipe 510, so that the spray head 530 sprays each position of the heat exchange tubes 121 alternately, avoiding the spray head 530 covering a large area at the same time, causing blockage of the heat exchange tubes 121 and affecting the air flow.

[0028] Furthermore, the spray head 530 is rotatably connected to the connecting pipe 520 .

[0029] The spray head 530 can rotate around the connecting pipe 520, thereby improving the coverage of the spray head 530 and avoiding the existence of spraying dead angles.

[0030] Furthermore, the connecting pipe 520 is an “L”-shaped structure, the bottom of the spray head 530 is a conical structure, and the bottom of the spray head 530 is provided with a spray hole 321, which is a spiral through hole.

[0031] The reaction force generated when the spray head 530 sprays can drive the spray head 530 to rotate and can drive the spray head 530 to revolve around the water supply pipe 510, without the need for external driving equipment, which is energy-saving and environmentally friendly.

[0032] Furthermore, a water baffle 107 is provided on the inner end surface of the exhaust gas outlet 104 .

[0033] The water baffle 107 prevents the water sprayed by the sprinkler head 530 from splashing into the exhaust gas outlet 104, thereby reducing the humidity of the exhaust gas.

[0034] Furthermore, a solenoid valve 106 is provided on the water supply pipe 510 .

[0035] By controlling the opening and closing of the solenoid valve 106 , automatic intermittent spraying of the spray head 530 is achieved.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polyester workshop tail gas online condensation device, comprising a tail gas condenser (1) and a fan (2), wherein the side of the tail gas condenser (1) is provided with a cooling water inlet (101), a cooling water outlet (102), a tail gas inlet (103) and a tail gas outlet (104), and the fan (2) is provided with an air inlet (201) and an air outlet (202), and the air inlet (201) and the tail gas outlet (104) are connected through a stainless steel pipe, characterized in that: The tail gas condenser (1) is provided with a thermal resistance thermometer (3) and an electric regulating valve (4) at the outer end thereof, and a spin spray mechanism (5) is provided inside the tail gas condenser (1); The tail gas condenser (1) comprises a spray section (110), a condensation section (120) and a condensation receiving section (130); the spin spray mechanism (5) is installed in the spray section (110); the thermal resistance thermometer (3) is installed between the air inlet (201) and the tail gas outlet (104); the electric regulating valve (4) is installed at the cooling water inlet (101); and the electric regulating valve (4) and the thermal resistance thermometer (3) are electrically connected.

2. The polyester workshop tail gas online condensation device according to claim 1, characterized in that: The condensation section (120) is provided with heat exchange tubes (121), and the bottom of the condensation receiving section (130) is provided with a sewage outlet (105).

3. The polyester workshop tail gas online condensation device according to claim 1, characterized in that: The self-spinning spray mechanism (5) comprises a water supply pipe (510), a connecting pipe (520) and a spray head (530); a sleeve (521) is provided on the connecting pipe (520); and the connecting pipe (520) is rotatably connected to the water supply pipe (510) via the sleeve (521).

4. The polyester workshop tail gas online condensation device according to claim 3, characterized in that: The spray head (530) is rotatably connected to the connecting pipe (520).

5. The polyester workshop tail gas online condensation device according to claim 4, characterized in that: The connecting pipe (520) is an "L"-shaped structure, the bottom of the spray head (530) is a conical structure, and a spray hole (321) is provided at the bottom of the spray head (530), and the spray hole (321) is a spiral through hole.

6. The polyester workshop tail gas online condensation device according to claim 1, characterized in that: The inner end surface of the tail gas outlet (104) is provided with a water baffle (107).

7. The polyester workshop tail gas online condensation device according to claim 5, characterized in that: The water supply pipe (510) is provided with a solenoid valve (106).

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