DOP esterification waste gas treatment device

Abstract

The utility model discloses a DOP esterification waste gas treatment device which comprises a waste gas main pipeline, a third exhaust cut-off valve is installed on the waste gas main pipeline, a nitrogen pipeline is fixedly installed on a nitrogen pipeline, and the nitrogen pipeline is located behind the third exhaust cut-off valve. An online oxygen content analyzer, a gas pressure gauge and a gas flow meter are fixedly installed on the waste gas main pipeline, the gas flow meter, the gas pressure gauge and the online oxygen content analyzer are all located behind the nitrogen pipeline, the waste gas main pipeline is connected with a fin type cooler, and a chilled water feeding pipeline is fixedly installed on one side of the fin type cooler. According to the organic waste gas treatment device, due to the arrangement of the closed pipeline, the finned cooler, the low-pressure torch and the incinerator, the purpose that organic waste gas is fully condensed, recycled and incinerated is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas collection and separation and gas incineration pretreatment, in particular to a DOP esterification waste gas treatment device. Background Art

[0002] Dioctyl phthalate is an organic ester compound, commonly used as a plasticizer. It has the following main characteristics: Physical properties: Dioctyl phthalate is a colorless or light yellow transparent liquid with a special smell; Chemical properties: Dioctyl phthalate has good compatibility with most synthetic resins and rubbers used in industry.

[0003] The waste gas generated in the production process of dioctyl phthalate is an organic waste gas, which is generated in various production processes. When the equipment is produced, the waste gas is mostly discharged into the flare pipeline. This waste gas contains calorific value and is discharged into a low-pressure flare. If it is directly discharged on site, volatile organic compounds are likely to exceed the standard and pollute the environment. Therefore, a device is needed to improve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide a DOP esterification waste gas treatment device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a DOP esterification waste gas treatment device, comprising a waste gas main pipeline, a third exhaust shut-off valve is installed on the waste gas main pipeline, a nitrogen regulating valve is fixedly installed on the nitrogen supply pipeline, and the nitrogen supply pipeline is located behind the third exhaust shut-off valve, an online oxygen content analyzer, a remote pressure gauge and an air flow meter are fixedly installed on the waste gas main pipeline, and the air flow meter, the remote pressure gauge and the online oxygen content analyzer are all located behind the nitrogen supply pipeline, the waste gas main pipeline is connected to a finned cooler, a chilled water inlet pipeline is fixedly installed on one side of the finned cooler, a chilled water return pipeline is connected to the other side of the chilled water inlet pipeline, and the finned cooler is far away from the chilled water return pipeline. One end of the channel is connected to a condensate pipeline, the condensate pipeline is connected to a condensate collecting tank, the condensate delivery pipeline is respectively connected to the bottom of the condensate collecting tank, the condensate delivery pipeline is connected to the alcohol extraction tower feed tank, one end of the exhaust gas main pipeline of the finned cooler outlet is installed with a second exhaust pipeline, the second exhaust pipeline is installed with a second exhaust cut-off valve at one end away from the finned cooler, and the second exhaust cut-off valve is connected to the incinerator, the exhaust gas main pipeline is connected to a first induced draft fan and a second induced draft fan, a first exhaust pipeline is installed between the exhaust outlets of the first induced draft fan and the second induced draft fan, the first exhaust pipeline is installed with a first exhaust cut-off valve, the outlet of the first exhaust cut-off valve is connected to a low-pressure torch, and the low-pressure torch is installed with a low-pressure flare main pipeline.

[0006] Preferably, the exhaust gas main pipeline, the finned cooler and the condensate pipeline, the second exhaust pipeline, and the condensate collection tank are interconnected.

[0007] Preferably, the first exhaust duct and the second exhaust duct are interconnected with the first induced draft fan and the second induced draft fan.

[0008] Preferably, the first exhaust shut-off valve is interconnected with the low-pressure flare, the first induced draft fan and the second induced draft fan respectively through the first exhaust duct.

[0009] Preferably, the incinerator is interconnected with the second exhaust shut-off valve.

[0010] Preferably, the exhaust gas main pipeline, the online oxygen content analyzer, the remote pressure gauge and the gas flow meter are interconnected with the finned cooler.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] When the device is in use, the exhaust gas is condensed at low temperature through the combined arrangement of a low-pressure torch, an incinerator, a finned cooler and an alcohol extraction tower storage tank, and the organic liquid phase is recovered and can be reused, thereby realizing fully enclosed treatment of exhaust gas emissions. The remaining gas phase after condensation enters the exhaust gas TO incinerator for incineration, and the calorific value of the organic exhaust gas is used to generate steam, which effectively solves environmental problems such as direct exhaust gas emissions and excessive volatile organic compounds (VOCs). It is safe and environmentally friendly, reduces the pollution of the environment by exhaust gas, improves the effectiveness of enterprises in environmental protection, and generates steam to obtain economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall workflow of the utility model.

[0014] In the figure: 1- low-pressure flare, 2- low-pressure flare main pipeline, 3- first induced draft fan, 4- first exhaust pipeline, 5- first exhaust shut-off valve, 6- second induced draft fan, 7- incinerator, 8- second exhaust shut-off valve, 9- second exhaust pipeline, 10- chilled water return pipeline, 11- finned cooler, 12- chilled water inlet pipeline, 13- gas flow meter, 14- remote pressure gauge, 15- online oxygen content analyzer, 16- condensate pipeline, 17- condensate collection tank, 18- third exhaust pipeline, 19- condensate delivery pipeline, 20- alcohol extraction tower storage tank, 21- third exhaust shut-off valve, 22- waste gas main pipeline, 23- nitrogen supply pipeline. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1 The utility model provides an embodiment: a DOP esterification waste gas treatment device, including a waste gas main pipeline 22, a third exhaust shut-off valve 21 is installed on the waste gas main pipeline 22, a nitrogen regulating valve is fixedly installed on the nitrogen supply pipeline 23, and the nitrogen supply pipeline 23 is located behind the third exhaust shut-off valve 21, an online oxygen content analyzer 15, a remote pressure gauge 14 and an air flow meter 13 are fixedly installed on the waste gas main pipeline 22, and the air flow meter 13, the remote pressure gauge 14 and the online oxygen content analyzer 15 are all located behind the nitrogen supply pipeline 23, the waste gas main pipeline 22 is connected to a finned cooler 11, a chilled water inlet pipeline 12 is fixedly installed on one side of the finned cooler 11, and a chilled water return pipeline 10 is connected to the other side of the chilled water inlet pipeline 12, and the finned cooler 11 is far away from the chilled water return pipeline One end of 10 is connected to the condensate pipeline 16, the condensate pipeline 16 is connected to the condensate collecting tank 17, the condensate delivery pipeline 19 is respectively connected to the bottom of the condensate collecting tank 17, the condensate delivery pipeline 19 is connected to the alcohol tower feed tank 20, one end of the exhaust gas main pipeline 22 at the outlet of the fin cooler 11 is installed with a second exhaust pipeline 9, the second exhaust pipeline 9 is installed at one end away from the fin cooler 11. The second exhaust shut-off valve 8 is connected to the incinerator 7, the exhaust gas main pipeline 22 is connected to the first induced draft fan 3 and the second induced draft fan 6, the first exhaust pipeline 4 is installed between the exhaust outlets of the first induced draft fan 3 and the second induced draft fan 6, the first exhaust pipeline 4 is installed with a first exhaust shut-off valve 5, the outlet of the first exhaust shut-off valve 5 is connected to the low-pressure flare 1, and the low-pressure flare main pipeline 2 is installed on the low-pressure flare 1.

[0017] The exhaust gas main pipeline 22, the finned cooler 11, the condensate pipeline 16, the second exhaust pipeline 9, and the condensate collection tank 17 are interconnected to transmit the organic exhaust gas.

[0018] The first exhaust duct 4 and the second exhaust duct 9 are interconnected with the first induced draft fan 3 and the second induced draft fan 6 to facilitate further transmission of gas.

[0019] The first exhaust shut-off valve 5 is interconnected with the low-pressure flare 1, the first induced draft fan 3 and the second induced draft fan 6 through the first exhaust pipe 4, so as to transmit and burn the organic waste gas.

[0020] The incinerator 7 is interconnected with the second exhaust shut-off valve 8, and the exhaust gas can be transmitted to the incinerator.

[0021] The exhaust gas main pipeline 22, the online oxygen content analyzer 15, the remote pressure gauge 14 and the gas flow meter 13 are interconnected with the finned cooler 11, so as to facilitate the unified management of the organic exhaust gas.

[0022] Working principle: When in use, first connect the exhaust main pipeline 22 with the DOP esterification process outside, so that the exhaust gas can be introduced. At the same time, the exhaust gas can be detected and controlled by the gas pressure gauge 14 and the online oxygen content analyzer 15. The nitrogen pipeline 23 is used to adjust the pressure of the exhaust main pipeline 22. The exhaust main pipeline 22 is connected to the fin cooler 11, so that the organic liquid phase generated by the low-temperature condensation of the exhaust gas through the fin cooler 11 can enter the condensate collection tank 17 through the lower outlet pipe of the fin cooler 11. A discharge pipeline is installed at the bottom end of the condensate collection tank 17, so that the liquid phase inside the condensate collection tank 17 can be transported to the outside world through the discharge pipeline at the bottom of the condensate collection tank 17, and the fin cooler 11 is connected to the first induced draft fan 3 through the second exhaust pipeline 9. The first induced draft fan 3 is connected to the first induced draft fan 3 through the second exhaust pipeline 9. The outlet of the fan 3 and the second induced draft fan 6 are connected to the first exhaust shut-off valve 5, and the first exhaust shut-off valve 5 is connected to the low-pressure flare main pipeline 2 through a pipeline. The first induced draft fan 3 or the second induced draft fan 6 is started to extract and transport the exhaust gas to the low-pressure flare 1. At the same time, the organic waste gas is transmitted to the internal transport device of the low-pressure flare main pipeline 2 to enter the elevated flare for combustion. The inlet and outlet of the first induced draft fan 3 and the second induced draft fan 6 are connected by a pipeline, and the outlet of the finned cooler 11 is connected to the incinerator 7 and the exhaust gas main pipeline 22 through a pipeline. After the incinerator 7 is started, the first induced draft fan 3 and the second induced draft fan 6 are turned off, the first exhaust shut-off valve 5 is closed, and the second exhaust shut-off valve 8 is opened. The exhaust gas passes through the second exhaust pipeline 9, and the negative pressure of the incinerator 7 sucks the exhaust gas into the incinerator 7 for incineration to generate steam, thereby completing the treatment of the organic waste gas.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A DOP esterification waste gas treatment device, comprising a waste gas main pipeline (22), characterized in that: The exhaust gas main pipeline (22) is provided with a third exhaust shut-off valve (21), the nitrogen supply pipeline (23) is fixedly provided with a nitrogen regulating valve, and the nitrogen supply pipeline (23) is located behind the third exhaust shut-off valve (21), and the exhaust gas main pipeline (22) is fixedly provided with an online oxygen content analyzer (15), a remote pressure gauge (14) and an air flow meter (13), and the air flow meter (13), the remote pressure gauge (14) and the online oxygen content analyzer (15) are located behind the nitrogen replenishment pipeline (23), the exhaust gas main pipeline (22) is connected to the finned cooler (11), a chilled water inlet pipeline (12) is fixedly installed on one side of the finned cooler (11), and the other side of the chilled water inlet pipeline (12) is connected to the chilled water return pipeline (10), and the end of the finned cooler (11) away from the chilled water return pipeline (10) is connected to the condensate pipeline (16), and the condensate pipeline (16) is connected to the condensate pipeline (16). 6) is connected to a condensate collecting tank (17), a condensate delivery pipe (19) is respectively connected to the bottom of the condensate collecting tank (17), the condensate delivery pipe (19) is connected to the alcohol extraction tower feed tank (20); one end of the exhaust gas main pipe (22) at the outlet of the finned cooler (11) is installed with a second exhaust pipe (9), the end of the second exhaust pipe (9) away from the finned cooler (11) is installed with a second exhaust shut-off valve (8), and the second exhaust shut-off valve (8) is connected to the incinerator (7); the exhaust gas main pipe (22) is connected to a first induced draft fan (3) and a second induced draft fan (6); a first exhaust pipe (4) is installed between the exhaust outlets of the first induced draft fan (3) and the second induced draft fan (6); the first exhaust pipe (4) is installed with a first exhaust shut-off valve (5), and the outlet of the first exhaust shut-off valve (5) is connected to a low-pressure flare (1), and the low-pressure flare (1) is installed with a low-pressure flare main pipe (2).

2. A DOP esterification waste gas treatment device according to claim 1, characterized in that: The exhaust gas main pipeline (22), the finned cooler (11), the condensate pipeline (16), the second exhaust pipeline (9), and the condensate collection tank (17) are interconnected.

3. A DOP esterification waste gas treatment device according to claim 2, characterized in that: The first exhaust duct (4) and the second exhaust duct (9) are interconnected with the first induced draft fan (3) and the second induced draft fan (6).

4. A DOP esterification waste gas treatment device according to claim 3, characterized in that: The first exhaust shut-off valve (5) is respectively interconnected with the low-pressure flare (1), the first induced draft fan (3) and the second induced draft fan (6) through the first exhaust pipeline (4).

5. A DOP esterification waste gas treatment device according to claim 4, characterized in that: The incinerator (7) is interconnected with the second exhaust shut-off valve (8).

6. A DOP esterification waste gas treatment device according to claim 5, characterized in that: The exhaust gas main pipeline (22), the online oxygen content analyzer (15), the remote pressure gauge (14) and the gas flow meter (13) are interconnected with the finned cooler (11).

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