Chemical plant unorganized waste gas collection and treatment system

Abstract

The utility model discloses a chemical plant unorganized waste gas collection and treatment system, and belongs to the technical field of waste gas collection and treatment. The defects that in the prior art, a traditional chemical plant unorganized waste gas collection and treatment mode is single, the operation difficulty is large, organic volatile gas cannot be effectively removed, the treated waste gas still does not reach the standard, and pollution is still caused to the environment are overcome. The main body structure of the device comprises a waste gas inlet pipeline used for inorganized waste gas to enter, a Venturi tube communicated with the waste gas inlet pipeline, a flue gas cleaning tower communicated with the Venturi tube and an incinerator used for waste gas incineration, and an outlet of the flue gas cleaning tower is connected with the incinerator through a waste gas induced draft fan. And the bottom of the venturi tube is provided with a washing oil circulating system used for absorbing waste gas. The device is mainly used for collecting and incinerating the unorganized waste gas of the chemical plant.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas collection and treatment, and in particular relates to a system for collecting and treating unorganized waste gas from a chemical plant. Background Art

[0002] As industrial development places increasingly higher demands on environmental protection, most chemical companies currently focus on the treatment of organized waste gas generated during material storage and production processes, but pay insufficient attention to unorganized waste gas. There are three main treatment methods, namely chemical absorption, physical adsorption and incineration. Most companies only use one of these methods, which is single and difficult to operate. It cannot effectively remove organic volatile gases, and the waste gas after treatment still does not meet the standards, still causing pollution to the environment.

[0003] For example, the Chinese utility model patent with authorization announcement number CN 217843886 U discloses an ultra-low emission waste gas treatment system for the petrochemical industry. The system adopts an RTO+CO series design and can minimize energy consumption and fully recover the heat energy released by the waste gas through different operation modes, thereby reducing production and operation costs. However, its shortcomings are that the system is complex to install and uses many components, which is not conducive to improvement based on the original equipment. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a system for collecting and treating unorganized waste gas from a chemical plant.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] A system for collecting and treating unorganized waste gas from a chemical plant comprises a waste gas intake pipe for the entry of unorganized waste gas, a venturi tube connected to the waste gas intake pipe, a flue gas cleaning tower connected to the venturi tube, and an incinerator for incinerating waste gas, wherein the outlet of the flue gas cleaning tower is connected to the incinerator via an exhaust gas induced draft fan, and an oil washing circulation system for absorbing the waste gas is provided at the bottom of the venturi tube.

[0007] Preferably, the wash oil circulation system includes a wash oil cooler and a wash oil circulation pump, the inlet and outlet of the wash oil circulation pump are respectively connected to the bottom of the venturi tube and the inlet of the wash oil cooler, and the outlet of the wash oil cooler is connected to the upper end of the venturi tube.

[0008] Preferably, the outlet of the wash oil cooler is also connected to the upper spraying point of the flue gas cleaning tower.

[0009] Preferably, a dilution fan is connected to the pipeline between the exhaust gas induced draft fan and the incinerator.

[0010] Preferably, the bottom of the venturi tube is a reaction tank, and the reaction tank is provided with wash oil for absorbing exhaust gas.

[0011] Preferably, the cooling temperature of the wash oil cooler is 30-60°C.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The exhaust gas is fully mixed with the wash oil in the Venturi tube, and the inertial collision mechanism is used to ensure the removal effect of large molecular oil and gas;

[0014] 2. After the exhaust gas is initially absorbed and purified, large molecular oil and gas such as benzene and naphthalene are effectively removed, avoiding the exhaust gas pipeline being blocked by medium crystallization, making it difficult for the device to operate for a long period of time;

[0015] 3. Set up a dilution fan to reduce the concentration of explosive gases in the exhaust gas and effectively ensure the safety of the incineration process;

[0016] To sum up, the unorganized waste gas generated by material loading and unloading in chemical plants can be effectively collected and treated, safely incinerated, and finally incinerated to meet emission standards, effectively improving the on-site working environment and meeting national environmental protection requirements. The adjustment method is simple and existing equipment can be used for transformation, which is convenient for construction. At the same time, it can be invested in one time and designed, installed and used at the same time as the equipment, avoiding complex inspection and maintenance in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a system schematic diagram of the utility model.

[0018] In the figure: 1. Waste gas intake pipe; 2. Wash oil cooler; 3. Wash oil circulation pump; 4. Venturi tube; 5. Flue gas cleaning tower; 6. Waste gas induced draft fan; 7. Dilution fan; 8. Incinerator; 9. Reactor. DETAILED DESCRIPTION

[0019] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, a system for collecting and treating unorganized waste gas from a chemical plant includes a waste gas intake pipe 1 for the entry of unorganized waste gas, a venturi tube 4 connected to the waste gas intake pipe 1, a flue gas cleaning tower 5 connected to the venturi tube 4, and an incinerator 8 for incinerating waste gas, wherein the outlet of the flue gas cleaning tower 5 is connected to the incinerator 8 via an exhaust gas induced draft fan 6, and an oil washing circulation system for absorbing the waste gas is provided at the bottom of the venturi tube 4.

[0022] In this embodiment, the waste gas generated during the material loading and unloading process enters the Venturi tube 4 through the waste gas inlet pipe 1. After the waste gas and the washing oil are fully mixed in the Venturi tube 4, they enter the flue gas cleaning tower 5. In the flue gas cleaning tower 5, the waste gas contacts the washing oil sprayed on the upper part in reverse order, and the waste gas is initially absorbed and purified. After the waste gas is initially absorbed and purified, it is pressurized by the waste gas induced draft fan 6 and sent to the incinerator 8 through a pipeline for incineration treatment to meet emission standards.

[0023] Embodiment 2:

[0024] A system for collecting and treating unorganized waste gas from a chemical plant, which differs from Example 1 in that the wash oil circulation system includes a wash oil cooler 2 and a wash oil circulation pump 3, the inlet and outlet of the wash oil circulation pump 3 are respectively connected to the bottom of a venturi tube 4 and the inlet of the wash oil cooler 2, and the outlet of the wash oil cooler 2 is connected to the upper end of the venturi tube 4.

[0025] Furthermore, the outlet of the wash oil cooler 2 is also connected to the upper spraying point of the flue gas cleaning tower 5 .

[0026] Furthermore, a dilution fan 7 is connected to the pipeline between the exhaust gas induced draft fan 6 and the incinerator 8. In order to ensure the safety of the incineration process, the dilution fan 7 is added, and a certain amount of air is added to dilute the exhaust gas before it enters the incinerator 8 to ensure that the combustible gas content in the exhaust gas is lower than 25% of the lower explosion limit.

[0027] Furthermore, the bottom of the venturi tube 4 is a reaction tank 9, and the reaction tank 9 is provided with wash oil for absorbing exhaust gas.

[0028] Furthermore, the cooling temperature of the wash oil cooler 2 is 30-60°C. In this embodiment, in order to ensure the absorption effect of benzene and naphthalene in the exhaust gas, the wash oil circulation temperature is controlled to be 30-60°C.

[0029] The working principle of the utility model is:

[0030] The unorganized waste gas from the loading and unloading device enters the venturi tube 4 together with the circulating washing oil through the waste gas inlet pipe 1, is fully mixed and enters the flue gas cleaning tower 5, and is reversely released with the washing oil sprayed on the top. The large oil and gas molecules in the waste gas are absorbed by the washing oil, and then the waste gas enters the waste gas induced draft fan 6, and after being pressurized, it enters the incinerator 8 for incineration treatment and meets the emission standards; the washing oil after absorbing the waste gas is pressurized by the washing oil circulation pump 3, cooled by the washing oil cooler 2, and the washing oil temperature is controlled at 30-60°C, and is divided into two paths, one path enters the venturi tube 4 with the waste gas, and the other path enters the upper part of the flue gas cleaning tower 5 for spraying, and is circulated in this way; in order to ensure the safety of waste gas incineration, a dilution fan 7 is set, and air is introduced to dilute the waste gas before the waste gas enters the incinerator 8 to reduce the concentration of combustible gas, ensure the safety of the system, and realize the effective collection and treatment of the unorganized waste gas generated by the loading and unloading of materials in the chemical plant, safe incineration, and standard emission, thereby improving the on-site operating environment.

Claims

1. A chemical plant unorganized waste gas collection and treatment system, characterized by: The invention comprises a waste gas intake pipe (1) for the entry of unorganized waste gas, a venturi tube (4) connected to the waste gas intake pipe (1), a flue gas cleaning tower (5) connected to the venturi tube (4), and an incinerator (8) for incinerating waste gas. The outlet of the flue gas cleaning tower (5) is connected to the incinerator (8) via a waste gas induced draft fan (6). The bottom of the venturi tube (4) is provided with an oil washing circulation system for absorbing waste gas.

2. The chemical plant unorganized waste gas collection and treatment system according to claim 1 is characterized in that: The wash oil circulation system comprises a wash oil cooler (2) and a wash oil circulation pump (3), wherein the inlet and outlet of the wash oil circulation pump (3) are respectively connected to the bottom of the venturi tube (4) and the inlet of the wash oil cooler (2), and the outlet of the wash oil cooler (2) is connected to the upper end of the venturi tube (4).

3. The chemical plant unorganized waste gas collection and treatment system according to claim 2 is characterized in that: The outlet of the wash oil cooler (2) is also connected to the upper spraying point of the flue gas cleaning tower (5).

4. The chemical plant unorganized waste gas collection and treatment system according to claim 3 is characterized in that: A dilution fan (7) is connected to the pipeline between the exhaust gas induced draft fan (6) and the incinerator (8).

5. The chemical plant unorganized waste gas collection and treatment system according to any one of claims 1 to 4, characterized in that: The bottom of the venturi tube (4) is a reaction tank (9), and the reaction tank (9) is provided with wash oil for absorbing waste gas.

6. The chemical plant unorganized waste gas collection and treatment system according to any one of claims 2 to 4, characterized in that: The cooling temperature of the wash oil cooler (2) is 30-60°C.

Images