Tail gas treatment device for carbon black production

Abstract

The utility model discloses a tail gas treatment device for carbon black production, and relates to the technical field of carbon black production, an outlet of a denitration reactor is communicated with a desulfurizing tower through a pipeline, an outlet of the desulfurizing tower is communicated with a dehydrating tower through a booster fan, and an outlet of the dehydrating tower is communicated with a heating boiler through a tail gas fan; a steam outlet of the heating boiler is communicated to a jacket inlet of the oxidation kettle through a pipeline. Carbon black production tail gas enters a denitration reactor to remove nitric oxide in the tail gas, then enters a desulfurization tower to remove sulfur dioxide in the tail gas, then enters a dehydration tower through a booster fan to remove moisture, then enters a heating boiler to serve as fuel, and generated steam enters an oxidation kettle to serve as a heat source for subsequent surface treatment of carbon black. A heat source generated by combustion of the carbon black tail gas is fully utilized, energy waste is avoided, the production cost is saved, harmful substances in the waste gas can be effectively removed, and the method is environmentally friendly. The whole process is simple to operate and suitable for industrialization.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of carbon black production, specifically relates to a tail gas treatment device for carbon black production. BACKGROUND

[0002] Carbon black tail gas is a kind of very dangerous waste gas, and the main components include carbon monoxide, carbon dioxide, hydrogen, nitride, sulfur dioxide, water and a small amount of hydrocarbons, carbon black particles and other dust.The carbon black particles and nitride can be deposited in the respiratory system of human body, resulting in respiratory diseases.Secondly, the volatile hydrocarbon organic matter in carbon black tail gas has great threat to human health and environment, and part of the compounds is also the precursor of ozone, which can greatly affect air quality.

[0003] At present, carbon black tail gas is mainly incinerated and then discharged, which causes waste heat to be wasted, and the harmful gas content in the tail gas after incineration is relatively high, so direct discharge is harmful to the environment. SUMMARY

[0004] The utility model relates to the technical field of carbon black production, specifically relates to a tail gas treatment device for carbon black production, which recycles and utilizes waste heat, saves cost and is environment-friendly.

[0005] To solve the above technical problems, the technical scheme of the utility model is:

[0006] A tail gas treatment device for carbon black production, comprising a denitration reactor, wherein the inlet of the denitration reactor is connected with a carbon black tail gas inlet pipeline, the outlet of the denitration reactor is connected with a desulfurization tower through a pipeline, the outlet of the desulfurization tower is connected with a dewatering tower through a pressurizing fan, and the outlet of the dewatering tower is connected with a heating boiler through a tail gas fan.

[0007] The steam outlet of the heating boiler is connected with the jacket inlet of the oxidation kettle through a pipeline.

[0008] As an improved technical scheme, the outlet of the desulfurization tower is connected with a hypergravity treatment equipment through a pipeline, and the hypergravity treatment equipment is connected with the dewatering tower through the pressurizing fan.

[0009] As an improved technical scheme, the outlet of the dewatering tower is connected with a dryer through the tail gas fan, and the outlet of the dryer is connected with the heating boiler through a pipeline.

[0010] As an improved technical scheme, the steam outlet of the heating boiler is connected with the jacket inlet of the dryer through a pipeline.

[0011] As an improved technical scheme, the jacket condensate outlets of the oxidation kettle and the dryer are respectively connected with a condensate recovery tank through pipelines.

[0012] As an improved technical solution, the carbon black tail gas inlet pipeline is communicated to the inlet of the bag filter, and the outlet of the bag filter is communicated to the inlet of the denitration reactor through a pipeline.

[0013] As a preferred technical solution, the outlet of the bag filter is communicated to the inlet of the cyclone separator through a pipeline, and the outlet of the cyclone separator is communicated to the inlet of the denitration reactor through a pipeline.

[0014] As a preferred technical solution, the flue gas outlet of the heating boiler is communicated with an absorption tower through a pipeline, and the top gas phase outlet of the absorption tower is communicated with an activated carbon adsorption tower through a pipeline.

[0015] As a preferred technical solution, the bottom outlet of the adsorption tower is communicated to the top inlet of the adsorption tower through a circulating pump.

[0016] As a preferred technical solution, the inside of the dehydration tower is provided with a plurality of vertical partitions, the plurality of partitions are each provided with a through hole, and the through holes on adjacent partitions are arranged alternately up and down.

[0017] Due to the adoption of the above technical solutions, the beneficial effects of the present application are as follows:

[0018] The utility model discloses a tail gas treatment device for carbon black production, including denitration reactor, the inlet of denitration reactor is communicated with carbon black tail gas inlet pipeline, and the outlet of denitration reactor is communicated with desulfurization tower through a pipeline, and the outlet of desulfurization tower is communicated with dehydration tower through pressure fan, and the outlet of dehydration tower is communicated with heating boiler through tail gas fan, the steam outlet of heating boiler is communicated to the jacket inlet of oxidation kettle through a pipeline. Carbon black production tail gas enters denitration reactor and removes nitrogen oxides in tail gas, then enters desulfurization tower and removes sulfur dioxide therein, then enters dehydration tower through pressure fan, removes moisture, then tail gas enters heating boiler as fuel, and the generated steam enters oxidation kettle as heat source for subsequent surface treatment of carbon black, fully utilizes the heat source generated by carbon black tail gas combustion, avoids the waste of energy, saves production cost, can effectively remove harmful substances in waste gas, and is environment-friendly. The whole process is simple to operate and suitable for industrialization.

[0019] The outlet of the desulfurization tower is communicated with a hypergravity treatment device through a pipeline, and the hypergravity treatment device is communicated to the dehydration tower through the pressure fan. The hypergravity treatment device can significantly improve the removal rate of harmful substances. When treating waste gas containing VOCs, the purification rate of the hypergravity treatment device can reach more than 90%, effectively reducing the load of subsequent treatment. In addition, the hypergravity treatment device can also efficiently remove hydrogen sulfide, organic sulfur, ammonia and other malodorous substances in waste gas, achieving standard emission of tail gas.

[0020] The outlet of the dehydration tower is communicated with a dryer through the tail gas fan, and the outlet of the dryer is communicated to the heating boiler through a pipeline.

[0021] The steam outlet of the heating boiler is communicated to the jacket inlet of the dryer through a pipeline, and the steam generated during combustion of the heating boiler can be used as power for water removal of the dryer, so that the heat generated by combustion of the tail gas is fully utilized, and cost is saved.

[0022] The jacket condensate outlets of the oxidation kettle and the dryer are respectively communicated to a condensate recovery tank through pipelines.

[0023] The carbon black tail gas inlet pipeline is communicated to the inlet of a bag filter, and the outlet of the bag filter is communicated to the inlet of the denitration reactor through a pipeline.

[0024] The outlet of the bag filter is communicated to the inlet of a cyclone separator through a pipeline, and the outlet of the cyclone separator is communicated to the inlet of the denitration reactor through a pipeline.

[0025] The flue gas outlet of the heating boiler is communicated to an absorption tower through a pipeline, and the top gas phase outlet of the absorption tower is communicated to an activated carbon adsorption tower through a pipeline.

[0026] The bottom outlet of the adsorption tower is communicated to the top inlet of the adsorption tower through a circulating pump, and the absorption liquid in the adsorption tower is circulated outside through the circulating pump, and is sprayed from the top of the adsorption tower to the bottom, so that the adsorption effect of the tail gas is better.

[0027] The dehydration tower is provided with a plurality of vertical partitions, and the partitions are provided with through holes. BRIEF DESCRIPTION OF DRAWINGS

[0028] The utility model is further described below in combination with the drawings and examples.

[0029] Figure 1 It is a structural schematic diagram of the utility model example.

[0030] The components include: 1. Denitrification reactor; 2. Carbon black tail gas inlet pipe; 3. Desulfurization tower; 4. Pressurized blower; 5. Dehydration tower; 6. Tail gas blower; 7. Heating boiler; 8. Oxidation kettle; 9. High gravity treatment equipment; 10. Dryer; 11. Condensate recovery tank; 12. Bag filter; 13. Cyclone separator; 14. Absorption tower; 15. Activated carbon adsorption tower; 16. Circulating pump; 17. Baffle plate; 18. Through hole. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] like Figure 1 As shown, a tail gas treatment device for carbon black production includes a denitrification reactor 1. The inlet of the denitrification reactor 1 is connected to a carbon black tail gas inlet pipe 2. The outlet of the denitrification reactor 1 is connected to a desulfurization tower 3 via a pipe. The outlet of the desulfurization tower 3 is connected to a dehydration tower 5 via a pressurized blower 4. The outlet of the dehydration tower 5 is connected to a heating boiler 7 via a tail gas blower 6. The steam outlet of the heating boiler 7 is connected to the jacket inlet of an oxidation reactor 8 via a pipe. The carbon black production tail gas enters the denitrification reactor 1 to remove nitrogen oxides, then enters the desulfurization tower 3 to remove sulfur dioxide, and then enters the dehydration tower 5 via the pressurized blower 4 to remove moisture. The tail gas then enters the heating boiler 7 as fuel, and the generated steam enters the oxidation reactor 8 as a heat source for subsequent surface treatment of the carbon black. This fully utilizes the heat generated by the combustion of carbon black tail gas, avoids energy waste, saves production costs, effectively removes harmful substances from the waste gas, and is environmentally friendly. The entire process is simple to operate and suitable for industrialization.

[0033] The outlet of desulfurization tower 3 is connected to a gravity treatment device 9 via a pipeline. The gravity treatment device 9 is connected to the dehydration tower 5 via the pressurized fan 4. The gravity treatment device 9 can significantly improve the removal rate of harmful substances. When treating waste gas containing VOCs, the purification rate of the gravity treatment device 9 can reach more than 90%, effectively reducing the load on subsequent treatment. In addition, the gravity treatment device 9 can also efficiently remove odorous substances such as hydrogen sulfide, organic sulfur, and ammonia from the waste gas, achieving compliant emissions.

[0034] The outlet of the dehydration tower 5 is connected to a dryer 10 via the exhaust gas fan 6, and the outlet of the dryer 10 is connected to the heating boiler 7 via a pipeline. The dried exhaust gas is further dehydrated by passing through the dryer 10, which improves the purity of the exhaust gas when it is used as fuel, resulting in better combustion.

[0035] The steam outlet of the heating boiler 7 is communicated to the jacket inlet of the dryer 10 through a pipeline, and the steam generated by the combustion of the heating boiler 7 can be used as the power for the dehydration of the dryer 10, so that the heat generated by the combustion of the tail gas is fully utilized, and the cost is saved.

[0036] The jacket condensate outlets of the oxidation kettle 8 and the dryer 10 are respectively communicated to the condensate recovery tank 11 through pipelines. By recovering the steam condensate, waste is avoided, and the filtered steam condensate can be used for the water replenishment of the heating boiler 7.

[0037] The carbon black tail gas inlet pipeline 2 is communicated to the inlet of the bag filter 12, and the outlet of the bag filter 12 is communicated to the inlet of the denitration reactor 1 through a pipeline. The bag filter 12 is used for preliminarily filtering the carbon black tail gas, removing most of the carbon black particles and dust, and avoiding environmental pollution caused by subsequent emission into the air.

[0038] The outlet of the bag filter 12 is communicated to the inlet of the cyclone separator 13 through a pipeline, and the outlet of the cyclone separator 13 is communicated to the inlet of the denitration reactor 1 through a pipeline. The cyclone separator 13 is used for separating the tail gas passing through the bag filter 12 again, and capturing and collecting the particulate dust again.

[0039] The flue gas outlet of the heating boiler 7 is communicated to the absorption tower 14 through a pipeline, and the top gas phase outlet of the absorption tower 14 is communicated to the activated carbon adsorption tower 15 through a pipeline. The tail gas is burned in the heating boiler 7, enters the absorption tower 14, and is adsorbed by the alkali liquor, and then is adsorbed by the activated carbon adsorption tower 15, and finally is emitted into the air, which is friendly to the environment.

[0040] The bottom outlet of the absorption tower is communicated to the top inlet of the absorption tower through a circulating pump 16, the absorption liquid in the absorption tower is circulated outside through the circulating pump 16, and the absorption effect of the tail gas is better.

[0041] The dehydration tower 5 is internally provided with a plurality of vertical partitions 17, the adjacent through holes 18 on the partitions 17 are alternately arranged, the dehydration tower 5 is internally provided with water absorption silica gel particles in the embodiment, the residence time and path of the tail gas in the dehydration tower 5 are long, and the dehydration effect is good.

[0042] It should be understood that the embodiments are only used for illustrating the present application and are not used for limiting the scope of the present application. In addition, it should be understood that after reading the content of the present application, those skilled in the art can make various changes or modifications to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims

1. A tail gas treatment device for carbon black production, characterized by: The system comprises a denitration reactor, an inlet of which is connected with a carbon black tail gas inlet pipeline, an outlet of the denitration reactor is connected with a desulfurization tower through a pipeline, an outlet of the desulfurization tower is connected with a dehydration tower through a pressurized fan, and an outlet of the dehydration tower is connected with a heating boiler through a tail gas fan. A steam outlet of the heating boiler is connected with a jacket inlet of an oxidation kettle through a pipeline.

2. The tail gas treatment device for carbon black production according to claim 1, characterized in that: An outlet of the desulfurization tower is connected with a supergravity treatment device through a pipeline, and the supergravity treatment device is connected with the dehydration tower through the pressurized fan.

3. The tail gas treatment device for carbon black production according to claim 1, characterized in that: An outlet of the dehydration tower is connected with a dryer through the tail gas fan, and an outlet of the dryer is connected with the heating boiler through a pipeline.

4. The tail gas treatment device for carbon black production according to claim 3, characterized in that: A steam outlet of the heating boiler is connected with a jacket inlet of the dryer through a pipeline.

5. The tail gas treatment device for carbon black production according to claim 3, characterized in that: Jacket condensate outlets of the oxidation kettle and the dryer are respectively connected with a condensate recovery tank through pipelines.

6. The tail gas treatment device for carbon black production according to claim 1, characterized in that: The carbon black tail gas inlet pipeline is connected with an inlet of a bag filter, and an outlet of the bag filter is connected with an inlet of the denitration reactor through a pipeline.

7. The tail gas treatment device for carbon black production according to claim 6, characterized in that: An outlet of the bag filter is connected with an inlet of a cyclone separator through a pipeline, and an outlet of the cyclone separator is connected with an inlet of the denitration reactor through a pipeline.

8. The tail gas treatment device for carbon black production according to claim 1, characterized in that: A flue gas outlet of the heating boiler is connected with an absorption tower, and a top gas phase outlet of the absorption tower is connected with an activated carbon adsorption tower through a pipeline.

9. The tail gas treatment device for carbon black production according to claim 8, characterized in that: A bottom outlet of the adsorption tower is connected with a top inlet of the adsorption tower through a circulating pump.

10. The tail gas treatment device for carbon black production according to claim 1, characterized in that: The dehydration tower is internally provided with a plurality of vertical partitions, each of the partitions is provided with a through hole, and the through holes on adjacent partitions are alternately arranged in up and down directions.

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