Industrial tail gas recovery treatment system

Abstract

An industrial tail gas recovery processing system belongs to the technical field of environmental protection equipment and comprises a reactor tail gas collecting device, a storage tank tail gas collecting device and a gas assisting tank tail gas recovery device. The reactor tail gas collecting device, the storage tank tail gas collecting device and the auxiliary gas tank tail gas recycling device are respectively communicated with a tail gas recycling bus through pipelines, the tail gas recycling bus is communicated with a condensate tank, the condensate tank is communicated with a condensate pump through a pipeline, the condensate pump is communicated with a condensate preheater through a pipeline, and the condensate preheater is communicated with a condensate pump through a pipeline. The condensate preheater is communicated with the atmospheric distillation tower through a pipeline, the atmospheric distillation tower is communicated with the circulating liquid tank through a pipeline, the condensate tank and the atmospheric distillation tower are respectively connected with the waste gas incineration device through pipelines, and the lower part of the atmospheric distillation tower is communicated with the waste liquid incineration device. The method is mainly applied to tail gas treatment in chemical production.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical environmental protection, and specifically relates to an industrial tail gas recovery and treatment system. Background Art

[0002] Adhering to the concept of "sustainable development is good development", the chemical industry and even the entire human society have put forward higher requirements for energy conservation and emission reduction. In this regard, industrial exhaust gas, as the main source of gas pollution, is a focus that deserves great attention.

[0003] Conventional intermediate tank areas, such as raw material tanks, intermediate product tanks and waste liquid tanks, are discharged through on-site breathing valves on the tank tops and conventional tail gas venting. The industrial tail gas produced by the polystyrene device mainly includes non-methane total hydrocarbons, ethylbenzene, styrene, nitrogen and other mixed gases that are harmful to the environment and personnel health.

[0004] If these organic waste gases are directly discharged into the atmosphere without treatment, they will cause serious environmental pollution and have adverse effects on the health of surrounding residents. In order to deal with this problem, the polystyrene industrial tail gas must be purified to meet the atmospheric pollutant emission standards.

[0005] This utility model patent changes the previous industrial exhaust emission and recycling treatment to solve the impact on the environment and harm to human health. Utility Model Content

[0006] The utility model aims to provide an industrial tail gas recovery and treatment system to solve the problem that the organic waste gas generated by a polystyrene device is directly discharged into the atmosphere without being treated, causing serious environmental pollution.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] An industrial tail gas recovery and processing system comprises a reactor tail gas collection device, a storage tank tail gas collection device and an air-assisting tank tail gas recovery device.

[0009] The reactor tail gas recovery device is used to collect the organic waste gas generated by the reactor.

[0010] The storage tank tail gas recovery device is used to collect the organic waste gas and nitrogen generated by evaporation in the storage tank.

[0011] The additive tail gas recovery device is used to collect the organic waste gas and nitrogen generated in the additive tank.

[0012] The core improvements of this utility model are as follows:

[0013] The reactor tail gas collection device, the storage tank tail gas collection device and the gas-assisting tank tail gas recovery device are respectively connected to the tail gas recovery bus through pipelines.

[0014] The tail gas recovery bus is connected to the condensate tank, the condensate tank is connected to the condensate pump through a pipeline, the condensate pump is connected to the condensate preheater through a pipeline, the condensate preheater is connected to the atmospheric distillation tower through a pipeline, the atmospheric distillation tower is connected to the circulating liquid tank through a pipeline, the condensate tank and the atmospheric distillation tower are connected to the waste gas incineration device through pipelines respectively, the lower part of the atmospheric distillation tower is connected to the waste liquid incineration device, the waste gas incineration device is a waste gas incinerator, the waste liquid incineration device is a waste liquid incinerator, the distillation tower separates the condensate to obtain a clean circulating liquid, the waste gas and waste liquid pipelines are connected to public works, and finally sent to the incinerator for incineration treatment.

[0015] Preferably: a condenser is installed in front of the condensate tank, and the condenser is connected to the tail gas recovery bus.

[0016] The advantages and positive effects of the utility model are:

[0017] The utility model cools the collected waste gas into condensate and waste gas through a condenser, and separates styrene, ethylbenzene, non-methane total hydrocarbons, etc. in the condensate by using a distillation device;

[0018] Recycling styrene and ethylbenzene for repeated use as circulating liquid reduces production costs and provides certain economic benefits for the company. At the same time, the remaining waste gas and waste liquid are sent to the incinerator for incineration so that they can be safely discharged after meeting the atmospheric pollutant emission standards to protect environmental safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a working principle diagram of the utility model.

[0020] In the figure: 1 condensate tank; 2 condensate pump; 3 condensate preheater; 4 atmospheric distillation tower; 5 circulating liquid tank; 6 condenser; 7 reactor collection device; 8 storage tank tail gas collection device; 9 auxiliary gas tank tail gas recovery device. DETAILED DESCRIPTION

[0021] 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. It is obvious that 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.

[0022] Example 1

[0023] like Figure 1 Shown

[0024] An industrial tail gas recovery and treatment system, comprising a reactor tail gas collection device 7, a storage tank tail gas collection device 8 and an air-assisting tank tail gas recovery device 9, characterized in that:

[0025] The reactor collecting device 7, the storage tank tail gas collecting device 8 and the gas-assisting tank tail gas recovery device 9 are respectively connected to the tail gas recovery bus through pipelines, the tail gas recovery bus is connected to the condenser (6), the condenser (6) is connected to the condensate tank 1, the condensate tank 1 is connected to the condensate pump 2 through a pipeline, the condensate pump 2 is connected to the condensate preheater 3 through a pipeline, the condensate preheater 3 is connected to the atmospheric distillation tower 4 through a pipeline, the atmospheric distillation tower 4 is connected to the circulating liquid tank 5 through a pipeline, the condensate tank 1 and the atmospheric distillation tower 4 are respectively connected to the waste gas incineration device through pipelines, and the lower part of the atmospheric distillation tower 4 is connected to the waste liquid incineration device.

[0026] The vacuum liquid tank, additive tank and storage tank in the intermediate tank area of ​​the polystyrene unit reactor are optimized to add tail gas recovery branch pipelines, tail gas collection main pipelines, flame arresters, etc., and the tail gas collected in the pipeline is centrally treated by using nitrogen pipeline components, regulating valves, gate valves, one-way valves, three-way valves, tail gas conveying fans, etc.

[0027] The regulating valves on the nitrogen and tail gas collection pipelines designed on the top of the intermediate storage tank are controlled by DCS in stages to achieve tank pressure control and closed discharge of tail gas for each intermediate tank, making the tail gas discharge in the intermediate tank area safer and more environmentally friendly.

[0028] The tail gas collected by the pipeline is cooled into condensate by the condenser 10 and stored in the condensate tank 1. The excess exhaust gas is discharged into the exhaust gas incinerator and burned cleanly.

[0029] When the condensate reaches the specified liquid level, use heat transfer oil to heat the condensate preheater 3 and the atmospheric distillation tower 4 to reach a certain temperature, start the condensate pump 2, pump the condensate into the condensate preheater 3 and the atmospheric distillation tower 4, separate the condensate, and discharge the light components in the condensate through the top of the tower to the waste gas incinerator for incineration, and discharge the excess waste liquid into the waste liquid incinerator for incineration; use the atmospheric distillation tower 4 to recover the styrene and ethylbenzene mixed as the circulating liquid and stored in the circulating liquid tank 5, and the circulating liquid can be reused.

[0030] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. An industrial tail gas recovery and treatment system, comprising a reactor tail gas collection device (7), a storage tank tail gas collection device (8) and an air tank tail gas recovery device (9), characterized in that: The reactor tail gas collection device (7), the storage tank tail gas collection device (8) and the gas-assisting tank tail gas recovery device (9) are respectively connected to the tail gas recovery bus through pipelines, the tail gas recovery bus is connected to the condensate tank (1), the condensate tank (1) is connected to the condensate pump (2) through a pipeline, the condensate pump (2) is connected to the condensate preheater (3) through a pipeline, the condensate preheater (3) is connected to the atmospheric distillation tower (4) through a pipeline, the atmospheric distillation tower (4) is connected to the circulating liquid tank (5) through a pipeline, the condensate tank (1) and the atmospheric distillation tower (4) are respectively connected to the waste gas incineration device through pipelines, and the lower part of the atmospheric distillation tower (4) is connected to the waste liquid incineration device.

2. The industrial tail gas recovery and treatment system according to claim 1, characterized in that: A condenser (6) is installed in front of the condensate tank (1), and the condenser (6) is connected to the tail gas recovery bus.

3. The industrial tail gas recovery and treatment system according to claim 1, characterized in that: The waste gas incineration device is a waste gas incinerator, and the waste liquid incineration device is a waste liquid incinerator.

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