Styrene vacuum devolatilization tail gas treatment system

Abstract

The utility model relates to the technical field of styrene polymerization, in particular to a styrene vacuum devolatilization tail gas treatment system which comprises a tail gas collecting mechanism, an emergency emptying mechanism and a tail gas treatment mechanism, the tail gas collecting mechanism comprises a cooler, and the cooler is used for collecting styrene vacuum devolatilization tail gas. The tail gas treatment mechanism is used for treating styrene vacuum devolatilization tail gas and cooling the styrene vacuum devolatilization tail gas to a set temperature, the emergency emptying mechanism is used for detecting and diluting the concentration of organic matters in the styrene vacuum devolatilization tail gas and directly discharging the styrene vacuum devolatilization tail gas, and the tail gas treatment mechanism comprises an incineration assembly. The incineration assembly is used for incinerating the styrene vacuum devolatilization tail gas into gas meeting the emission standard. According to the system design, the vacuum tail gas of each production line is treated, the energy of organic gas in the vacuum tail gas is recycled, and the fuel of an incineration assembly is saved, so that the reduction of environmental pollution is facilitated, resources are fully utilized, and sustainable development is promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of styrene polymerization, in particular to a styrene vacuum devolatilization tail gas processing system. Background Art

[0002] Styrene is a widely used raw material in industry, particularly in the manufacture of plastics and resins. It is primarily used to produce polystyrene, a rigid plastic used in a wide variety of products, including containers, packaging, and construction materials. Styrene is also a key raw material for the production of ABS resin, a resin formed by the polymerization of acrylonitrile, butadiene, and styrene. ABS resin exhibits excellent mechanical and processing properties and is widely used in the automotive, electronics, and home appliance industries.

[0003] During the styrene production process, a large amount of styrene vacuum devolatilization exhaust is generated. The organic compounds in this exhaust, such as styrene, toluene, and ethylbenzene, are all volatile organic compounds (VOCs). If these exhaust gases are directly discharged into the atmosphere, they will cause serious environmental pollution. VOCs are one of the main sources of air pollution, not only damaging human health but also negatively impacting ecosystems. Moreover, these organic compounds are also a valuable resource, and their direct discharge would result in a waste of resources.

[0004] Therefore, to address the environmental pollution and resource waste caused by styrene vacuum devolatilization exhaust, an effective treatment system is needed. This system should be able to remove organic matter from the exhaust while recovering useful substances. This will help reduce environmental pollution, fully utilize resources, and promote sustainable development. Utility Model Content

[0005] To address these issues, the present invention aims to overcome the environmental pollution and resource waste associated with styrene vacuum devolatilization tail gas in the prior art. By designing a styrene vacuum devolatilization tail gas treatment system, the system removes organic matter from the tail gas while simultaneously recovering useful substances. This system will help reduce environmental pollution, fully utilize resources, and promote sustainable development.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a system for treating styrene vacuum devolatilization tail gas, comprising a tail gas collection mechanism, an emergency venting mechanism and a tail gas treatment mechanism, wherein the tail gas collection mechanism comprises a cooler, which is used to collect styrene vacuum devolatilization tail gas and cool the styrene vacuum devolatilization tail gas to a set temperature, the emergency venting mechanism is arranged between the tail gas collection mechanism and the tail gas treatment mechanism, the emergency venting mechanism is used to detect and dilute the concentration of organic matter in the styrene vacuum devolatilization tail gas, and directly discharge the styrene vacuum devolatilization tail gas, and the tail gas treatment mechanism comprises an incineration component, which is used to incinerate the styrene vacuum devolatilization tail gas into a gas that meets emission standards.

[0007] As a preferred embodiment of the present invention, the emergency venting mechanism includes an exhaust gas emission main pipe and an exhaust gas exhaust valve. The exhaust gas emission main pipe is arranged between the exhaust gas collection mechanism and the exhaust gas treatment mechanism. The exhaust gas exhaust valve is arranged in the exhaust gas emission main pipe. The exhaust gas emission main pipe is used to transport the styrene vacuum devolatilization exhaust gas collected by the exhaust gas collection mechanism to the exhaust gas treatment mechanism.

[0008] As a preferred embodiment of the present invention, the emergency venting mechanism further includes an organic matter concentration detector, which is used to detect the concentration of organic matter in the styrene vacuum devolatilization tail gas in the tail gas exhaust main pipe.

[0009] As a preferred embodiment of the present invention, the emergency venting mechanism also includes a nitrogen emergency feeding pipeline and a nitrogen valve. The nitrogen emergency feeding pipeline is connected to the exhaust gas main pipe. The nitrogen valve is arranged at the place where the nitrogen emergency feeding pipeline and the exhaust gas main pipe are connected. The nitrogen emergency feeding pipeline is used to add nitrogen into the exhaust gas main pipe when the organic matter concentration detector detects that the concentration of exhaust organic matter in the exhaust gas main pipe exceeds the standard, so as to dilute the concentration of organic matter in the styrene vacuum devolatilization exhaust.

[0010] As a preferred embodiment of the present invention, the emergency venting mechanism also includes an emptying pipeline and a venting valve. The emptying pipeline is connected to the exhaust gas emission main pipe. The venting valve is arranged at the place where the emptying pipeline and the exhaust gas emission main pipe are connected. The emptying pipeline is used to discharge the diluted styrene vacuum devolatilization exhaust gas for emergency discharge.

[0011] As a preferred embodiment of the present invention, the emergency venting mechanism further includes a first flame arrester, which is arranged in the exhaust gas main pipe, and the flame arrester is located between the nitrogen emergency feeding pipeline and the venting pipeline.

[0012] As a preferred embodiment of the present invention, it also includes an exhaust mechanism, which includes an induced draft fan. The induced draft fan is arranged in the exhaust gas emission main pipe, and the induced draft fan is located between the exhaust gas collection mechanism and the exhaust gas treatment mechanism. The induced draft fan is used to suck the styrene vacuum devolatilization exhaust gas in the exhaust gas collection mechanism into the exhaust gas treatment mechanism.

[0013] As a preferred embodiment of the present invention, the incineration assembly includes a hot oil furnace and a second flame arrester, the hot oil furnace is provided with a first air intake and a second air intake, the first air intake of the hot oil furnace is sealed and connected to the exhaust gas main pipe, the second flame arrester is arranged in the exhaust gas main pipe, and the second flame arrester is located at one end of the exhaust gas main pipe close to the first air intake.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Under the premise of ensuring safety, the utility model uses an exhaust gas collection mechanism and an exhaust gas treatment mechanism to completely remove or convert the organic matter in the styrene vacuum devolatilization exhaust gas into harmless substances through incineration. The treated exhaust gas can be safely discharged after meeting environmental protection standards. Through such a system design, the vacuum exhaust gas of each production line is treated, and the energy of the organic gas therein is reused, saving the fuel of the incineration component, which will help reduce pollution to the environment, while making full use of resources and promoting sustainable development. In addition, the utility model is also provided with an emergency venting mechanism, which can quickly discharge the exhaust gas into the atmosphere in an emergency to prevent the system pressure from increasing or a safety accident from occurring. At the same time, the mechanism also has a detection function, which can monitor the concentration of organic matter in the exhaust gas in real time to ensure that the discharged exhaust gas meets safety standards.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of a styrene vacuum devolatilization tail gas treatment system. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of a styrene vacuum devolatilization tail gas treatment system. Figure 2 .

[0020] Figure 3 This is a schematic diagram of the structure of a styrene vacuum devolatilization tail gas treatment system. Figure 3 .

[0021] Reference numerals include:

[0022] Exhaust gas collection mechanism 1, cooler 1a, emergency venting mechanism 2, exhaust gas discharge main pipe 2a, exhaust gas exhaust valve 2b, organic matter concentration detector 2c, nitrogen emergency feeding pipeline 2d, nitrogen valve 2e, exhaust pipeline 2f, vent valve 2g, first flame arrester 2h, exhaust gas treatment mechanism 3, incineration component 3a, hot oil furnace 3a1, first air suction port 3a11, second air suction port 3a12, second flame arrester 3a2, exhaust mechanism 4, induced draft fan 4a. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] like Figures 1 to 3 As shown, the present invention discloses a system for treating styrene vacuum devolatilization tail gas, comprising a tail gas collecting mechanism 1, an emergency venting mechanism 2 and a tail gas treatment mechanism 3, wherein the tail gas collecting mechanism 1 comprises a cooler 1a, wherein the cooler 1a is used to collect styrene vacuum devolatilization tail gas and cool the styrene vacuum devolatilization tail gas to a set temperature, wherein the emergency venting mechanism 2 is arranged between the tail gas collecting mechanism 1 and the tail gas treatment mechanism 3, wherein the emergency venting mechanism 2 is used to detect and dilute the organic matter concentration in the styrene vacuum devolatilization tail gas and directly discharge the styrene vacuum devolatilization tail gas, wherein the tail gas treatment mechanism 3 comprises an incineration component 3a, wherein the incineration component 3a is used to incinerate the styrene vacuum devolatilization tail gas into a gas that meets emission standards. Under the premise of ensuring safety, the present invention completely removes or converts the organic matter in the styrene vacuum devolatilization tail gas into harmless substances through incineration through the tail gas collecting mechanism 1 and the tail gas treatment mechanism 3. The treated tail gas can be discharged safely after meeting environmental protection standards. This system design processes the vacuum exhaust from each production line, reusing the energy of the organic gases and saving fuel in the incineration component 3a. This helps reduce environmental pollution, fully utilizes resources, and promotes sustainable development. Furthermore, the utility model is equipped with an emergency venting mechanism 2, which can quickly discharge the exhaust gas into the atmosphere in an emergency, preventing system pressure increases or safety accidents. This mechanism also has a detection function, which can monitor the concentration of organic matter in the exhaust gas in real time to ensure that the discharged exhaust gas meets safety standards.

[0025] Specifically, refer to Figure 2As shown, the emergency venting mechanism 2 includes an exhaust gas emission main pipe 2a and an exhaust gas exhaust valve 2b. The exhaust gas emission main pipe 2a is arranged between the exhaust gas collecting mechanism 1 and the exhaust gas treatment mechanism 3. The exhaust gas exhaust valve 2b is arranged in the exhaust gas emission main pipe 2a. The exhaust gas emission main pipe 2a is used to transport the styrene vacuum devolatilization exhaust gas collected by the exhaust gas collecting mechanism 1 to the exhaust gas treatment mechanism 3.

[0026] Specifically, refer to Figure 2 As shown, the emergency venting mechanism 2 further includes an organic matter concentration detector 2c, which is used to detect the concentration of organic matter in the styrene vacuum devolatilization tail gas in the tail gas exhaust main pipe 2a.

[0027] Specifically, refer to Figure 2 As shown, the emergency venting mechanism 2 also includes a nitrogen emergency feeding pipeline 2d and a nitrogen valve 2e. The nitrogen emergency feeding pipeline 2d is connected to the exhaust gas main pipe 2a. The nitrogen valve 2e is arranged at the place where the nitrogen emergency feeding pipeline 2d and the exhaust gas main pipe 2a are connected. The nitrogen emergency feeding pipeline 2d is used to add nitrogen into the exhaust gas main pipe 2a when the organic matter concentration detector 2c detects that the concentration of exhaust organic matter in the exhaust gas main pipe 2a exceeds the standard, so as to dilute the concentration of organic matter in the styrene vacuum devolatilization exhaust.

[0028] Specifically, refer to Figure 2 As shown, the emergency venting mechanism 2 also includes an emptying pipeline 2f and a venting valve 2g. The emptying pipeline 2f is connected to the exhaust gas emission main pipe 2a. The venting valve 2g is arranged at the connection between the emptying pipeline 2f and the exhaust gas emission main pipe 2a. The emptying pipeline 2f is used to discharge the diluted styrene vacuum devolatilization exhaust gas for emergency discharge.

[0029] Specifically, refer to Figure 2 As shown, the emergency venting mechanism 2 also includes a first flame arrester 2h, which is disposed within the exhaust manifold 2a and located between the nitrogen emergency feed line 2d and the exhaust line 2f. This first flame arrester 2h effectively prevents sparks or high-temperature gases in the exhaust from causing fire or explosion during the exhaust process, further improving system safety.

[0030] Specifically, refer to Figure 3 As shown, it also includes an exhaust mechanism 4, which includes an induced draft fan 4a. The induced draft fan 4a is arranged in the exhaust gas emission main pipe 2a, and the induced draft fan 4a is located between the exhaust gas collection mechanism 1 and the exhaust gas treatment mechanism 3. The induced draft fan 4a is used to suck the styrene vacuum devolatilization exhaust gas in the exhaust gas collection mechanism 1 into the exhaust gas treatment mechanism 3.

[0031] Specifically, refer to Figure 3As shown, the incineration assembly 3a includes a hot oil furnace 3a1 and a second flame arrester 3a2. The hot oil furnace 3a1 is provided with a first air intake 3a11 and a second air intake 3a12. The first air intake 3a11 of the hot oil furnace 3a1 is sealedly connected to the exhaust gas main pipe 2a. The second flame arrester 3a2 is disposed within the exhaust gas main pipe 2a, and is located at one end of the exhaust gas main pipe 2a near the first air intake 3a11. The second flame arrester 3a2 effectively prevents sparks or high-temperature gases in the exhaust gas from causing fire or explosion during the exhaust process, further improving the safety of the system.

[0032] The more specific principles of the present invention are as follows:

[0033] refer to Figures 1 to 3 As shown, when the organic matter concentration detector 2c detects that the concentration of organic matter in the styrene vacuum devolatilization tail gas in the tail gas emission main pipe 2a exceeds the standard, the tail gas exhaust valve 2b is closed, the nitrogen valve 2e and the vent valve 2g are opened, and the nitrogen emergency feeding pipeline 2d adds nitrogen into the tail gas emission main pipe 2a to dilute the concentration of organic matter in the styrene vacuum devolatilization tail gas. After the concentration of organic matter in the styrene vacuum devolatilization tail gas is reduced to the dischargeable standard, it is discharged to a height of more than 25 meters through the exhaust pipeline 2f for emergency discharge.

[0034] refer to Figures 1 to 3 As shown, when an emergency occurs, such as equipment failure or process abnormality, the tail gas exhaust valve 2b is closed, the nitrogen valve 2e and the vent valve 2g are opened, and the nitrogen emergency feeding pipeline 2d adds nitrogen into the tail gas exhaust main pipe 2a to dilute the concentration of organic matter in the styrene vacuum devolatilization tail gas, and after the concentration of organic matter in the styrene vacuum devolatilization tail gas is reduced to the dischargeable standard, it is discharged to a height of more than 25 meters through the venting pipeline 2f for emergency discharge to prevent the styrene vacuum devolatilization tail gas from accumulating in the system, causing pressure increase or safety accidents.

[0035] refer to Figures 1 to 3As shown, when the organic matter concentration detector 2c detects that the concentration of organic matter in the styrene vacuum devolatilization tail gas in the tail gas discharge main pipe 2a meets the standard, the nitrogen valve 2e and the vent valve 2g are closed, and the tail gas exhaust valve 2b is opened. The styrene vacuum devolatilization tail gas, which meets the standard organic matter concentration, passes through the first flame arrester 2h in the tail gas discharge main pipe 2a, is drawn into the first air intake 3a11 of the hot oil furnace 3a1 by the induced draft fan 4a, and then passes through the second flame arrester 3a2 of each hot oil furnace 3a1. It is then mixed with the air drawn into the normal second air intake 3a12 of the hot oil furnace 3a1 and serves as the normal intake air for the hot oil furnace 3a1. This system design processes the styrene vacuum devolatilization tail gas from each production line, thereby recycling the energy of the organic gas therein and saving fuel for the hot oil furnace 3a1. At the same time, the organic gases ethylbenzene, styrene, and other hydrocarbon organic compounds in the styrene vacuum devolatilization tail gas are mixed with the fuel gas and burned to form carbon dioxide and boiler exhaust gas, meeting emission standards. This will help reduce pollution to the environment while making full use of resources and promoting sustainable development.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A system for treating styrene vacuum devolatilization tail gas, characterized in that: The invention comprises an exhaust gas collecting mechanism (1), an emergency venting mechanism (2) and an exhaust gas treatment mechanism (3). The exhaust gas collecting mechanism (1) comprises a cooler (1a), and the cooler (1a) is used to collect styrene vacuum devolatilization exhaust gas and cool the styrene vacuum devolatilization exhaust gas to a set temperature. The emergency venting mechanism (2) is arranged between the exhaust gas collecting mechanism (1) and the exhaust gas treatment mechanism (3). The emergency venting mechanism (2) is used to detect and dilute the organic matter concentration in the styrene vacuum devolatilization exhaust gas and directly discharge the styrene vacuum devolatilization exhaust gas. The exhaust gas treatment mechanism (3) comprises an incineration component (3a), and the incineration component (3a) is used to incinerate the styrene vacuum devolatilization exhaust gas into gas that meets emission standards.

2. A styrene vacuum devolatilization tail gas treatment system according to claim 1, characterized in that: The emergency venting mechanism (2) comprises an exhaust gas discharge main pipe (2a) and an exhaust gas exhaust valve (2b); the exhaust gas discharge main pipe (2a) is arranged between the exhaust gas collection mechanism (1) and the exhaust gas treatment mechanism (3); the exhaust gas exhaust valve (2b) is arranged in the exhaust gas discharge main pipe (2a); and the exhaust gas discharge main pipe (2a) is used to transport the styrene vacuum devolatilization exhaust gas collected by the exhaust gas collection mechanism (1) to the exhaust gas treatment mechanism (3).

3. A styrene vacuum devolatilization tail gas treatment system according to claim 2, characterized in that: The emergency venting mechanism (2) further comprises an organic matter concentration detector (2c), which is used to detect the concentration of organic matter in the styrene vacuum devolatilization tail gas in the tail gas exhaust main pipe (2a).

4. A styrene vacuum devolatilization tail gas treatment system according to claim 3, characterized in that: The emergency venting mechanism (2) further comprises a nitrogen emergency feeding pipeline (2d) and a nitrogen valve (2e). The nitrogen emergency feeding pipeline (2d) is connected to the tail gas discharge main pipe (2a). The nitrogen valve (2e) is arranged at the point where the nitrogen emergency feeding pipeline (2d) and the tail gas discharge main pipe (2a) are connected. The nitrogen emergency feeding pipeline (2d) is used to add nitrogen into the tail gas discharge main pipe (2a) when the organic matter concentration detector (2c) detects that the concentration of tail gas organic matter in the tail gas discharge main pipe (2a) exceeds the standard, so as to dilute the concentration of organic matter in the styrene vacuum devolatilization tail gas.

5. A styrene vacuum devolatilization tail gas treatment system according to claim 4, characterized in that: The emergency venting mechanism (2) further comprises a venting line (2f) and a venting valve (2g); the venting line (2f) is connected to the tail gas discharge main pipe (2a); the venting valve (2g) is arranged at the point where the venting line (2f) and the tail gas discharge main pipe (2a) are connected; the venting line (2f) is used for emergency discharge of the diluted styrene vacuum devolatilization tail gas.

6. A styrene vacuum devolatilization tail gas treatment system according to claim 5, characterized in that: The emergency venting mechanism (2) further comprises a first flame arrester (2h), which is arranged in the tail gas exhaust main pipe (2a), and the flame arrester is located between the nitrogen emergency feeding pipeline (2d) and the venting pipeline (2f).

7. A styrene vacuum devolatilization tail gas treatment system according to claim 2, characterized in that: The invention also includes an exhaust mechanism (4), wherein the exhaust mechanism (4) includes an induced draft fan (4a), the induced draft fan (4a) is arranged in the exhaust gas exhaust main pipe (2a), and the induced draft fan (4a) is located between the exhaust gas collection mechanism (1) and the exhaust gas treatment mechanism (3), and the induced draft fan (4a) is used to suck the styrene vacuum devolatilization exhaust gas in the exhaust gas collection mechanism (1) into the exhaust gas treatment mechanism (3).

8. A styrene vacuum devolatilization tail gas treatment system according to claim 2, characterized in that: The incineration assembly (3a) comprises a hot oil furnace (3a1) and a second flame arrester (3a2); the hot oil furnace (3a1) is provided with a first air inlet (3a11) and a second air inlet (3a12); the first air inlet (3a11) of the hot oil furnace (3a1) is sealedly connected to the exhaust gas main pipe (2a); the second flame arrester (3a2) is arranged in the exhaust gas main pipe (2a), and the second flame arrester (3a2) is located at one end of the exhaust gas main pipe (2a) close to the first air inlet (3a11).

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