An integrated equipment for treating waste gas in the petrochemical industry

Abstract

This utility model relates to the petrochemical industry and discloses an integrated equipment for treating waste gas in petrochemical applications. It includes an outer protective plate with an insulation layer. A water inlet and a wastewater outlet are located on the outer side of the outer protective plate. Two condensate outlets are also located on the outer side of the outer protective plate. An air inlet and an automatic control touchscreen are also installed on the outer side of the outer protective plate. In this utility model, the waste gas is introduced into a submerged heat exchanger to reduce its temperature. The waste gas then enters an alkaline scrubbing tower, which has an automatic dosing device to automatically add alkali solution. The alkaline scrubbing tower also has automatic water supply and drainage. After passing through the alkaline scrubbing tower, sulfides in the waste gas are removed. Finally, the waste gas enters a water scrubbing tower to remove residual alkali solution.

Description

Technical Field

[0001] This utility model relates to the petrochemical industry, and in particular to an integrated equipment for treating waste gas in the petrochemical industry. Background Technology

[0002] During the cleaning of oil pipes and sucker rods, various heating methods such as boiling and radiation are used. Due to the presence of oil pipe inlets and outlets, oil overflow outlets, and cleaning buffer tanks, a large amount of oil mist exhaust gas leaks out. The exhaust gas temperature is ~60℃ and contains a large amount of VOCs, sulfides, etc. In the petroleum and petrochemical system, sludge pools and sewage pools are generally closed pools, with the top usually covered by an inverted membrane or fiberglass arched cover. Sludge pools or sewage pools contain a large amount of volatile organic compounds, VOCs, sulfides, etc. During the day, under the sun's exposure, the temperature inside the sludge pools or sewage pools rises, and the exhaust gas temperature can reach over 50℃.

[0003] Existing waste gas treatment technologies typically employ multi-stage processes, such as alkaline washing for desulfurization, water washing for alkali removal, condensation cooling, and activated carbon adsorption. Some equipment uses a split design, requiring waste gas to be transported multiple times between different units, increasing energy consumption and the risk of pipeline leaks.

[0004] Existing waste gas treatment equipment still has significant shortcomings: alkaline and water scrubbing towers have low automation levels, requiring frequent manual intervention and easily leading to reagent waste or incomplete neutralization. The condensation system has insufficient heat exchange efficiency, resulting in inadequate waste gas cooling and affecting subsequent demisting and filtration effects. Activated carbon adsorption units lack intelligent monitoring, and delayed replacement after saturation leads to VOC escape. The equipment has low modularity, making maintenance difficult and resulting in long downtimes. Therefore, this paper proposes an integrated waste gas treatment system for the petrochemical industry to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an integrated equipment for treating waste gas in the petrochemical industry, which aims to improve the problems of excessively high waste gas temperature and poor treatment of VOCs and sulfides in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated equipment for treating waste gas in petrochemical industry, comprising an outer protective plate for insulation layer, a water inlet provided on the outer side of the outer protective plate for insulation layer, a wastewater discharge outlet provided on the outer side of the outer protective plate for insulation layer, two condensate discharge outlets provided on the outer side of the outer protective plate for insulation layer, an air inlet installed on the outer side of the outer protective plate for insulation layer, and an automatic control touch screen provided on the outer side of the outer protective plate for insulation layer;

[0007] As a further description of the above technical solution:

[0008] The outer side of the outer protective panel of the insulation layer is provided with a chiller heat dissipation exhaust port, the outer side of the outer protective panel of the insulation layer is provided with a chiller air inlet, the outer side of the outer protective panel of the insulation layer is provided with an air outlet, and the outer side of the outer protective panel of the insulation layer is provided with a chiller maintenance door.

[0009] As a further description of the above technical solution:

[0010] The outer protective panel of the insulation layer is lined with insulation cotton on all four sides. A chiller is installed inside the outer protective panel of the insulation layer. An exhaust fan is installed inside the outer protective panel of the insulation layer. A water pump is installed inside the outer protective panel of the insulation layer. A drain valve is installed inside the wastewater discharge outlet. A water tank inspection port is installed inside the outer protective panel of the insulation layer. An overflow port is installed inside the outer protective panel of the insulation layer. An inlet valve is installed inside the wastewater discharge outlet.

[0011] As a further description of the above technical solution:

[0012] An activated carbon adsorber, a dry filter, a demister, a condenser, a water washing tower, an alkaline washing tower, a pH monitor, and an automatic dosing device are all installed inside the outer protective panel of the insulation layer.

[0013] As a further description of the above technical solution:

[0014] The demister is equipped with demister packing, the activated carbon adsorber is equipped with activated carbon, and the condenser is equipped with condenser tubes. The condenser tubes are wrapped with fins on the outside to increase the heat exchange area and improve the heat exchange efficiency.

[0015] As a further description of the above technical solution:

[0016] The washing tower is equipped with washing tower nozzles and washing tower packing.

[0017] As a further description of the above technical solution:

[0018] The alkaline washing tower is equipped with an alkaline washing tower nozzle and is also equipped with alkaline washing tower packing.

[0019] As a further description of the above technical solution:

[0020] An immersion heat exchanger is installed inside the outer protective panel of the insulation layer. The heat exchanger is placed in water, with air flowing inside the pipes and water outside the pipes, in order to increase heat exchange efficiency. An exhaust fan is installed on the outer side of the outer protective panel of the insulation layer, and a chiller heat dissipation air inlet grille is installed on the outer side of the outer protective panel of the insulation layer.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the waste gas is introduced into a submerged heat exchanger to reduce the temperature of the waste gas. The waste gas then enters an alkaline scrubbing tower, which has an automatic dosing device that can automatically add alkaline solution into the tower. The alkaline scrubbing tower can also automatically supply and drain water. After passing through the alkaline scrubbing tower, the sulfides in the waste gas can be removed. The waste gas then enters a water scrubbing tower to remove residual alkaline solution from the waste gas.

[0023] 2. In this utility model, after the exhaust gas enters the condenser from the water washing tower, the chiller can provide refrigerant to the condenser, which can further reduce the temperature of the exhaust gas. The exhaust gas passes through a demister to remove water mist, and through a dry filter to remove particulate matter. Then, it passes through an activated carbon adsorber to remove VOCs from the exhaust gas. Finally, the exhaust gas passes through a centrifugal fan to achieve the effect of meeting emission standards. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of an integrated equipment for treating waste gas in the petrochemical industry proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the outlet structure of an integrated waste gas treatment device for petrochemical industry proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the chiller maintenance door of an integrated equipment for treating waste gas in the petrochemical industry proposed in this utility model.

[0027] Figure 4 This is a cross-sectional schematic diagram of the external protective plate of the insulation layer of an integrated equipment for treating waste gas in the petrochemical industry proposed in this utility model.

[0028] Figure 5 This is a schematic diagram of the condenser tube of an integrated waste gas treatment device for petrochemical industry proposed in this utility model.

[0029] Legend:

[0030] 1. External protective panel of insulation layer; 2. Water inlet; 3. Wastewater discharge outlet; 4. Condensate discharge outlet; 5. Air inlet; 6. Automatic control touch screen; 7. Chiller heat dissipation exhaust outlet; 8. Chiller air inlet; 9. Air outlet; 10. Chiller access door; 11. Insulation cotton; 12. Chiller; 13. Exhaust fan; 14. Water pump; 15. Drain valve; 16. Water tank access port; 17. Overflow outlet; 18. Water inlet valve; 19. Activated 20. Carbon adsorber; 21. Dry filter; 22. Demister; 23. Condenser; 24. Water washing tower; 25. Alkali washing tower; 26. pH monitor; 27. Automatic dosing device; 28. Demister packing; 29. ​​Condenser tube; 30. Activated carbon; 31. Water washing tower nozzle; 32. Water washing tower packing; 33. Alkali washing tower nozzle; 34. Alkali washing tower packing; 35. Submersible heat exchanger; 36. Exhaust fan; 37. Chiller air inlet grille. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-5 This utility model provides an embodiment of an integrated equipment for treating waste gas in the petrochemical industry, comprising an outer protective plate 1 with an insulation layer, a water inlet 2, a wastewater outlet 3, two condensate outlets 4, an air inlet 5, and an automatic control touch screen 6 on the outer side of the insulation layer. The outer side of the insulation layer also includes a chiller exhaust vent 7, a chiller air inlet 8, an air outlet 9, and a chiller maintenance door 10. The outer protective panel 1 of the insulation layer is equipped with insulation cotton 11 on all four sides. A chiller 12 is installed inside the outer protective panel 1 of the insulation layer. An exhaust fan 13 is installed inside the outer protective panel 1 of the insulation layer. A water pump 14 is installed inside the outer protective panel 1 of the insulation layer. A drain valve 15 is installed inside the wastewater discharge outlet 3. A water tank inspection port 16 is installed inside the outer protective panel 1 of the insulation layer. An overflow port 17 is installed inside the outer protective panel 1 of the insulation layer. An inlet valve 18 is installed inside the wastewater discharge outlet 3.

[0033] Specifically, this equipment can treat the above-mentioned high-temperature waste gas containing a large amount of VOCs and sulfides. The waste gas is introduced into the submerged heat exchanger 34 to reduce its temperature. The waste gas then enters the alkaline scrubbing tower 24, which has an automatic dosing device 26 that automatically adds alkali solution. The alkaline scrubbing tower 24 also has automatic water supply and drainage. After passing through the alkaline scrubbing tower 24, sulfides in the waste gas are removed. The waste gas then enters the water scrubbing tower 23 to remove residual alkali solution.

[0034] Reference Figures 1-5 The insulation layer outer protective plate 1 contains an activated carbon adsorber 19, a dry filter 20, a demister 21, a condenser 22, a water washing tower 23, an alkaline washing tower 24, a pH monitor 25, and an automatic dosing device 26. The demister 21 contains demister packing 27, the activated carbon adsorber 19 contains activated carbon 29, and the condenser 22 contains condenser tubes 28 with fins wound around their outer sides to increase the heat exchange area and improve heat exchange efficiency. The water washing tower 23 contains water washing tower nozzles 30 and water washing tower packing 31. Alkali washing tower 24 is equipped with alkali washing tower nozzles 32 and alkali washing tower packing 33. An immersion heat exchanger 34 is installed inside the outer protective plate 1 of the insulation layer. The heat exchanger is submerged in water, with air flowing inside the pipes and water outside, to increase heat exchange efficiency. An exhaust fan 35 and a chiller heat dissipation air inlet grille 36 are installed on the outer side of the outer protective plate 1 of the insulation layer.

[0035] Specifically, after the exhaust gas enters the condenser 22 from the water washing tower 23, the chiller 12 can provide refrigerant to the condenser 22, which can further reduce the temperature of the exhaust gas. The exhaust gas passes through the demister 21 to remove water mist, and through the dry filter 20 to remove particulate matter. Then, it passes through the activated carbon adsorber 19 to remove VOCs from the exhaust gas. Finally, the exhaust gas passes through the centrifugal fan to achieve the effect of meeting emission standards.

[0036] Working Principle: This equipment can treat high-temperature waste gas containing large amounts of VOCs and sulfides. The waste gas is introduced into a submerged heat exchanger 34 to reduce its temperature. Then, it enters an alkaline scrubbing tower 24, which has an automatic dosing device 26 to automatically add alkali solution. The tower also has automatic water supply and drainage. After passing through the alkaline scrubbing tower 24, sulfides are removed. The waste gas then enters a water scrubbing tower 23 to remove residual alkali solution. From the water scrubbing tower 23, the waste gas enters a condenser 22, where a chiller 12 provides refrigerant, further reducing the temperature. The waste gas then passes through a demister 21 to remove water mist, a dry filter 20 to remove particulate matter, and an activated carbon adsorber 19 to remove VOCs. Finally, a centrifugal fan completes the process, ensuring the waste gas meets emission standards.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A petrochemical waste gas treatment integrated device, comprising a thermal insulation layer external protection plate (1), characterized in that: The outer side of the outer protective plate (1) of the insulation layer is provided with a water inlet (2), a wastewater outlet (3) is provided on the outer side of the outer protective plate (1), two condensate outlets (4) are provided on the outer side of the outer protective plate (1), an air inlet (5) is installed on the outer side of the outer protective plate (1), and an automatic control touch screen (6) is provided on the outer side of the outer protective plate (1).

2. The waste gas treatment integrated device for petroleum chemical industry according to claim 1, characterized in that: The outer side of the insulation layer outer protective plate (1) is provided with a chiller heat dissipation exhaust port (7), the outer side of the insulation layer outer protective plate (1) is provided with a chiller air inlet (8), the outer side of the insulation layer outer protective plate (1) is provided with an air outlet (9), and the outer side of the insulation layer outer protective plate (1) is provided with a chiller maintenance door (10).

3. The waste gas treatment integrated device for petroleum chemical industry according to claim 1, characterized in that: The outer protective panel (1) of the insulation layer is provided with insulation cotton (11) on all four sides. A chiller (12) is installed inside the outer protective panel (1). An exhaust fan (13) is installed inside the outer protective panel (1). A water pump (14) is installed inside the outer protective panel (1). A drain valve (15) is provided inside the wastewater discharge port (3). A water tank inspection port (16) is provided inside the outer protective panel (1). An overflow port (17) is installed inside the outer protective panel (1). An inlet valve (18) is provided inside the wastewater discharge port (3).

4. The waste gas treatment integrated device for petroleum chemical industry according to claim 1, characterized in that: An activated carbon adsorber (19) is installed inside the outer protective panel (1) of the insulation layer. A dry filter (20) is installed inside the outer protective panel (1) of the insulation layer. A demister (21) is installed inside the outer protective panel (1) of the insulation layer. A condenser (22) is installed on the bottom side of the demister (21). A water washing tower (23) is installed inside the outer protective panel (1) of the insulation layer. An alkaline washing tower (24) is installed inside the outer protective panel (1) of the insulation layer. A pH monitor (25) is installed inside the outer protective panel (1) of the insulation layer. An automatic dosing device (26) is installed inside the outer protective panel (1) of the insulation layer.

5. The waste gas treatment integrated device for petroleum chemical industry according to claim 4, characterized in that: The demister (21) is equipped with demister packing (27), the activated carbon adsorber (19) is equipped with activated carbon (29), the condenser (22) is equipped with condenser tube (28), and the outside of the condenser tube (28) is wound with fins to increase the heat exchange area and improve the heat exchange efficiency.

6. The waste gas treatment integrated device for petroleum chemical industry according to claim 4, characterized in that: The washing tower (23) is equipped with a washing tower nozzle (30) and the washing tower (23) is filled with washing tower packing (31).

7. The waste gas treatment integrated device for petroleum chemical industry according to claim 4, characterized in that: The alkaline washing tower (24) is equipped with an alkaline washing tower nozzle (32) and the alkaline washing tower (24) is filled with alkaline washing tower packing (33).

8. The waste gas treatment integrated device for petroleum chemical industry according to claim 1, characterized in that: An immersion heat exchanger (34) is installed inside the outer protective plate (1) of the insulation layer. The heat exchanger is placed in water, with air flowing inside the pipe and water outside the pipe, in order to increase the heat exchange efficiency. An exhaust fan (35) is installed on the outer side of the outer protective plate (1) of the insulation layer, and a chiller heat dissipation air inlet grille (36) is installed on the outer side of the outer protective plate (1) of the insulation layer.

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