Device for efficiently treating carbon black production tail gas

Abstract

The utility model discloses a device for efficiently treating carbon black production tail gas. The device comprises a pretreatment unit, an adsorption unit and a catalytic treatment unit, the pretreatment unit comprises a condenser and a filter which are communicated; the adsorption unit comprises an activated carbon adsorption tower and a water spray tower which are sequentially communicated with the air outlet of the filter; the catalytic treatment unit comprises a catalytic oxidation reactor communicated with a gas outlet of the water spray tower. A VOC gas detector, a nitrogen oxide detector and a sulfide detector are arranged at a gas outlet of the catalytic treatment unit, and the gas outlet is communicated with a condenser and a chimney through a first electric valve and a second electric valve respectively; the VOC gas detector, the nitrogen oxide detector and the sulfide detector are respectively interlocked with the first electric valve and the second electric valve. According to the device, the carbon black production tail gas is treated in the modes of cooling, adsorption, catalytic oxidation and the like, the efficiency is high, the energy consumption is low, and waste gas materials generated in the treatment process are effectively recycled.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas treatment technical device, concretely relates to a device of high -efficient treatment carbon black production tail gas. BACKGROUND

[0002] Carbon black is an important industrial raw material, and is widely used in rubber, plastics, ink, paint and other fields. A large amount of tail gas will be produced in the production process of carbon black, which contains not only combustible gas, but also toxic and harmful substances and carbon black dust. If directly discharged into the atmosphere, it will cause serious pollution to the environment. Carbon black tail gas is mainly composed of carbon black particles, smoke, sulfide, nitrogen oxide and the like, which contains CO, H2, C2H2 and other combustible gases, but the content is relatively low, accounting for about 20% of the total amount of tail gas. At the same time, the CO concentration in the tail gas is relatively high, about 10% or so, much higher than the CO poisoning limit. Once leaked into the operating environment, it will cause harm to the operators. In addition, when the combustible components in the tail gas mix with oxygen to a certain concentration, there is a possibility of forming explosive gas. Moreover, after the carbon black tail gas is discharged into the atmosphere, it will cause serious air pollution, affect air quality, and long-term inhalation of these pollutants will cause damage to the respiratory system, and even increase the risk of respiratory diseases. Therefore, it is particularly important to treat carbon black tail gas.

[0003] At present, the treatment methods of carbon black tail gas mainly include the following: 1. Direct combustion method: carbon black tail gas is directly combusted as fuel, and combustible gaseous pollutants are converted into CO2 and H2O for standard emission. 2. Catalytic reaction method: CO, H2 and a certain amount of CO2 in carbon black tail gas are used as raw materials for catalytic reaction to produce methanol. 3. Waste heat recovery: the waste heat of carbon black tail gas is used for power generation or heating. Due to the complex composition of carbon black production tail gas, single method treatment is difficult to achieve ideal effect, therefore, how to provide a comprehensive treatment device for carbon black production tail gas is a problem to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a device for efficiently treating carbon black production tail gas is provided, which adopts cooling, adsorption, catalytic oxidation and other methods to treat carbon black production tail gas, has high efficiency, low energy consumption, and the waste gas materials generated in the treatment process are effectively recovered.

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

[0006] A device for efficiently treating carbon black production tail gas, comprising a pretreatment unit, an adsorption unit and a catalytic treatment unit.

[0007] The pretreatment unit comprises a condenser and a filter in communication.

[0008] The adsorption unit comprises an activated carbon adsorption tower and a water spraying tower which are sequentially communicated with the filter gas outlet;

[0009] The catalytic treatment unit comprises a catalytic oxidation reactor which is communicated with the water spraying tower gas outlet;

[0010] The catalytic treatment unit is provided with a VOC gas detector, a nitrogen oxide detector and a sulfide detector at the gas outlet, the gas outlet is communicated with a condenser and a chimney through a first electric valve and a second electric valve respectively, and the VOC gas detector, the nitrogen oxide detector and the sulfide detector are interlocked with the first electric valve and the second electric valve respectively.

[0011] Preferably, the condenser comprises a shell, the shell is provided with a flow divider at the gas inlet, the flow divider is provided with a plurality of gas inlet holes, and the plurality of gas inlet holes are non-parallel.

[0012] Preferably, a plurality of deflector plates are obliquely arranged on the inner wall of the shell.

[0013] Preferably, the bottom of the shell is provided with a discharge port, the discharge port is communicated with the solid material outlet of the filter through a pipeline and a valve, and a material recovery tank is further communicated.

[0014] Preferably, the activated carbon adsorption tower is filled with a plurality of activated carbon adsorption layers.

[0015] Preferably, a first porous air distribution plate is arranged between the plurality of activated carbon adsorption layers.

[0016] Preferably, a plurality of baffles are arranged on the inner wall of the water spraying tower, and the plurality of baffles are arranged in a cross and staggered manner.

[0017] Preferably, the catalytic oxidation reactor is filled with a plurality of catalyst layers, and a second porous air distribution plate is arranged between the plurality of catalyst layers.

[0018] Preferably, a first cyclone separator and a second cyclone separator are arranged on the connecting pipelines of the catalytic oxidation reactor and the condenser and the chimney respectively, and a catalyst recovery tank is communicated with the solid outlets of the first cyclone separator and the second cyclone separator.

[0019] Preferably, a first induced draft fan is arranged on the connecting pipeline of the first cyclone separator and the condenser, and a second induced draft fan is arranged on the connecting pipeline of the second cyclone separator and the chimney.

[0020] Due to the adoption of the above technical scheme, the present application has at least the following beneficial effects:

[0021] The utility model provides a device of high -efficient processing carbon black production tail gas, including pretreatment unit, adsorption unit, catalytic treatment unit, pretreatment unit includes the condenser, filter of intercommunication, adsorption unit includes with filter gas outlet sequentially intercommunication's activated carbon adsorption tower, water spray tower, catalytic treatment unit includes with water spray tower gas outlet intercommunication's catalytic oxidation reactor, catalytic treatment unit's gas export place is equipped with VOC gas detection appearance, nitrogen oxide detection appearance and sulfide detection appearance, and gas export passes through first electric valve, second electric valve respectively and condenser, chimney are linked together, and VOC gas detection appearance, nitrogen oxide detection appearance and sulfide detection appearance are respectively with first electric valve, second electric valve interlock setting.

[0022] The condenser of the device comprises a shell, a shunt plate is arranged at the gas inlet of the shell, a plurality of gas inlets are arranged on the shunt plate, the plurality of gas inlets are arranged in a non-parallel manner, and a plurality of spoiler plates are arranged on the inner wall of the shell in an inclined manner. In the above structure, the non-parallel gas inlets can guide the airflow to enter the condenser at different angles and directions, which helps to form a more uniform airflow distribution inside the condenser. The uniform airflow distribution can improve the heat exchange efficiency inside the condenser, thereby accelerating the condensation process. The spoiler plates arranged in an inclined manner can change the flow path of the fluid inside the condenser, making the fluid form a more complex flow pattern inside the condenser. This flow pattern increases the contact area and contact time of the fluid with the inner wall of the condenser, thereby improving the heat exchange efficiency. Moreover, the inclined arrangement of the spoiler plates helps to break the fluid boundary layer and reduce thermal resistance, further improving the heat exchange efficiency.

[0023] The bottom of the shell of the device is provided with a discharge port, and the discharge port and the solid material outlet of the filter are communicated with a material recovery tank through a pipeline and a valve. Through the above arrangement, the collected solids during the condensation process and the filtration process are effectively recovered, and the carbon black can be easily recovered from the part of the material.

[0024] The active carbon adsorption tower of the device is filled with multiple layers of active carbon adsorption layers, and a first porous air distribution plate is arranged between the multiple layers of active carbon adsorption layers. In the above structure, the multiple layers of active carbon adsorption layers can make full use of the adsorption capacity of active carbon, and each layer can adsorb harmful substances in the tail gas, thereby improving the overall adsorption efficiency. Moreover, the adsorption capacity of active carbon is closely related to its specific surface area, and the multiple layer design can ensure that more active carbon surfaces are in contact with the tail gas, increasing the adsorption sites and improving the adsorption capacity. The first porous air distribution plate is arranged between the multiple layers of active carbon adsorption layers, which can effectively and uniformly distribute the airflow, ensuring that the tail gas can uniformly pass through each layer of active carbon, avoiding the problem of uneven adsorption caused by excessive or insufficient local airflow, and improving the adsorption efficiency and stability of the entire adsorption tower. In addition, when the tail gas passes through the first porous air distribution plate, it forms tiny bubbles or droplets, increasing the contact area and contact time between the tail gas and the active carbon, thereby accelerating the adsorption rate and improving the adsorption efficiency.

[0025] The inner wall of the water spray tower of the device is provided with multiple baffles, and the multiple baffles are arranged in a cross and staggered manner. In the above structure, the cross and staggered baffles can change the path of the water flow, making the water flow form a more uniform distribution in the spray tower. Uniform water flow distribution helps to improve the spraying effect and ensure that the sprayed water can cover every corner of the spray tower, thereby more effectively removing pollutants in the tail gas. Moreover, the arrangement of the baffles can increase the degree of turbulence of the water flow in the spray tower, promoting the full mixing and contact of the sprayed water and the tail gas. The presence of the baffles can also increase the contact area and contact time between the sprayed water and air, which helps to improve the gas-liquid mass transfer efficiency. At the baffles, the water flow speed changes, forming a backflow zone, which further strengthens the disturbance and mixing between the gas and the liquid, thereby improving the spraying effect.

[0026] The catalytic oxidation reactor of the device is filled with multiple layers of catalyst layers, and a second porous air distribution plate is arranged between the multiple layers of catalyst layers. In the above structure, the multiple layers of catalyst layers enable the tail gas to undergo multiple catalytic oxidations, thereby improving the tail gas treatment efficiency. Moreover, the multiple layers of catalyst layers can make full use of the active sites of the catalyst, improving the utilization rate of the catalyst. The second porous air distribution plate can uniformly distribute the gas, enabling the tail gas to uniformly pass through each layer of catalyst, avoiding the problem of uneven tail gas treatment caused by excessively high or low local tail gas concentration.

[0027] The first cyclone separator and the second cyclone separator are arranged on the connecting pipeline of the catalytic oxidation reactor and the condenser and the chimney respectively, the solid outlets of the first cyclone separator and the second cyclone separator are communicated with a catalyst recovery tank, and the first induced draft fan is arranged on the connecting pipeline of the first cyclone separator and the condenser, and the second induced draft fan is arranged on the connecting pipeline of the second cyclone separator and the chimney. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Fig. 1 is a structural schematic diagram of the present application embodiment 1;

[0030] Fig. 2 is a structural schematic diagram of the present application condenser;

[0031] In the figure, 1, condenser; 2, filter; 3, activated carbon adsorption tower; 4, water spray tower; 5, activated carbon adsorption layer; 6, catalytic oxidation reactor; 7, catalyst layer; 8, VOC gas detector; 9, nitrogen oxide detector; 10, sulfide detector; 11, first electric valve; 12, second electric valve; 13, chimney; 14, first induced draft fan; 15, second induced draft fan; 16, shell; 17, flow divider; 18, air inlet hole; 19, spoiler; 20, discharge port; 21, material recovery tank; 22, first porous air distribution plate; 23, second porous air distribution plate; 24, baffle; 25, first cyclone separator; 26, second cyclone separator; 27, catalyst recovery tank. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application

[0033] Embodiment 1

[0034] As Figs. 1-2 shown in the figure, an efficient device for treating carbon black production tail gas, comprising a pretreatment unit, an adsorption unit, a catalytic treatment unit;

[0035] The pretreatment unit comprises a condenser 1 and a filter 2 in communication; the condenser 1 cools the high-temperature tail gas, facilitating subsequent processing; the filter 2 removes solid particles mixed in the tail gas, facilitating subsequent tail gas processing, and can also recover carbon black powder mixed in the carbon black tail gas;

[0036] The adsorption unit comprises an activated carbon adsorption tower 3 and a water spray tower 4 in turn communicated with the gas outlet of the filter 2, and the activated carbon adsorption tower 3 is filled with multiple layers of activated carbon adsorption layers 5; high-efficiency activated carbon is used as the adsorbent to remove VOCs and other harmful substances in the tail gas, and water spraying is used to remove water-soluble gases in the tail gas; through the combined treatment of the activated carbon adsorption tower 3 and the water spray tower 4, the treatment effect of the carbon black production tail gas is improved.

[0037] The catalytic treatment unit comprises a catalytic oxidation reactor 6 communicated with the gas outlet of the water spray tower 4, and the catalytic oxidation reactor 6 is filled with multiple layers of catalyst layers 7; under a certain temperature, the tail gas after adsorption treatment is catalytically oxidized under the catalysis of the multiple layers of catalyst layers 7, and is converted into harmless carbon dioxide and water, thereby improving the treatment efficiency of the carbon black production tail gas.

[0038] A VOC gas detector 8, a nitrogen oxide detector 9, and a sulfide detector 10 are arranged at the gas outlet of the catalytic treatment unit, and the gas outlet is communicated with the condenser 1 and a chimney 13 through a first electric valve 11 and a second electric valve 12, respectively; the VOC gas detector 8, the nitrogen oxide detector 9, and the sulfide detector 10 are interlocked with the first electric valve 11 and the second electric valve 12, respectively; the VOC gas detector 8, the nitrogen oxide detector 9, and the sulfide detector 10 can detect the tail gas after the treatment of the catalytic oxidation reactor 6; if the content of VOC gas, nitrogen oxide, and sulfur oxide does not meet the standard, a signal is transmitted to an external control system (not shown in the figure), and the external control system automatically controls the opening of the first electric valve 11, and the gas enters the condenser 1 for the next round of treatment under the action of a first induced draft fan 14; if the gas meets the standard, a signal is transmitted to the external control system (not shown in the figure), and the external control system automatically controls the opening of the second electric valve 12, and the gas is discharged to the atmosphere through the chimney 13 under the action of a second induced draft fan 15.

[0039] In this embodiment, the condenser 1 comprises a shell 16, and a flow divider 17 is arranged at the gas inlet of the shell 16, and a plurality of gas inlets 18 are arranged on the flow divider 17, and the plurality of gas inlets 18 are arranged non-parallelly. The above arrangement makes the tail gas enter the condenser 1 uniformly, improving the condensation efficiency of the tail gas.

[0040] In the embodiment, the inner wall of the shell 16 is provided with a plurality of spoilers 19, which can generate good turbulence, increase the complexity and turbulence of the gas flow in the condenser 1, and make the heat exchange between the gas and the inner wall of the condenser 1 more sufficient, thereby improving the condensation efficiency.

[0041] In the embodiment, the bottom of the shell 16 is provided with a discharge port 20, which is communicated with a solid material outlet of the filter 2 through a pipeline and a valve, and a material recovery tank 21. The solid particles separated in the condensation process and the filtration process and entrained in the tail gas are collected in the material recovery tank 21, which is convenient for subsequent recovery of carbon black.

[0042] In the embodiment, the first porous air distribution plate 22 is arranged between the plurality of activated carbon adsorption layers 5, and the second porous air distribution plate 23 is arranged between the plurality of catalyst layers 7. The first porous air distribution plate 22 and the second porous air distribution plate 23 can uniformly distribute the gas flow, thereby improving the contact efficiency of the gas with the activated carbon and the catalyst layers 7, enhancing the adsorption effect and the catalytic oxidation effect, and reducing the dead angle and uneven flow of the gas flow. The first porous air distribution plate 22 and the second porous air distribution plate 23 can ensure that each layer of activated carbon adsorption layer 5 and catalyst layer 7 can fully exert its performance, thereby improving the overall treatment efficiency.

[0043] In the embodiment, the inner wall of the water spray tower 4 is provided with a plurality of baffles 24 arranged in cross and staggered manner. The plurality of baffles 24 arranged in cross and staggered manner can form a larger contact area between the gas and the water, promote the dissolution and reaction of the gas through the water film, thereby improving the efficiency of the gas-liquid interaction; and the above structure effectively breaks the straight flow of the gas and the liquid, generates vortex and backflow phenomenon, enhances the gas-liquid mixing, so that the gas can more uniformly contact the liquid, thereby improving the spray adsorption efficiency of the tail gas. In addition, the staggered arrangement of the plurality of baffles 24 increases the flow path of the gas in the tower, thereby prolonging the residence time of the gas in the spray tower, increasing the opportunity of the gas to contact the spray water, and further improving the treatment effect.

[0044] In the embodiment, the connecting pipeline of the catalytic oxidation reactor 6, the condenser 1 and the chimney 13 is respectively provided with a first cyclone separator 25 and a second cyclone separator 26; the solid outlets of the first cyclone separator 25 and the second cyclone separator 26 are communicated with a catalyst recovery tank 27; the connecting pipeline of the first cyclone separator 25 and the condenser 1 is provided with a first induced draft fan 14, and the connecting pipeline of the second cyclone separator 26 and the chimney 13 is provided with a second induced draft fan 15.

[0045] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for efficient treatment of carbon black production off-gas, characterized by: The device comprises a pretreatment unit, an adsorption unit and a catalytic treatment unit. The pretreatment unit comprises a condenser and a filter in communication. The adsorption unit comprises an activated carbon adsorption tower and a water spray tower in communication with the gas outlet of the filter. The catalytic treatment unit comprises a catalytic oxidation reactor in communication with the gas outlet of the water spray tower. A VOC gas detector, a nitrogen oxide detector and a sulfide detector are arranged at the gas outlet of the catalytic treatment unit, and the gas outlet is connected to the condenser and the chimney through a first electric valve and a second electric valve, respectively.

2. The device for efficiently treating carbon black production tail gas according to claim 1, characterized in that: The condenser comprises a shell, and a shunt plate is arranged at the gas inlet of the shell.

3. The device for efficiently treating carbon black production tail gas according to claim 2, characterized in that: A plurality of gas inlets are arranged on the shunt plate and are arranged non-parallelly.

4. The device for efficiently treating carbon black production tail gas according to claim 2, characterized in that: A plurality of spoiler plates are arranged on the inner wall of the shell.

5. The device for efficiently treating carbon black production tail gas according to claim 1, characterized in that: A discharge port is arranged at the bottom of the shell, and the discharge port is connected to the solid material outlet of the filter through a pipeline and a valve.

6. The device for efficiently treating carbon black production tail gas according to claim 5, characterized in that: A plurality of activated carbon adsorption layers are filled in the activated carbon adsorption tower.

7. The device for efficiently treating carbon black production tail gas according to claim 1, characterized in that: A first porous air distribution plate is arranged between the activated carbon adsorption layers.

8. The device for efficiently treating carbon black production tail gas according to claim 1, characterized in that: A plurality of baffles are arranged on the inner wall of the water spray tower and are arranged crosswise and staggered.

9. The device for efficiently treating carbon black production tail gas according to claim 1, characterized in that: A plurality of catalyst layers are filled in the catalytic oxidation reactor, and a second porous air distribution plate is arranged between the catalyst layers.

10. The device for efficiently treating carbon black production tail gas according to claim 9, characterized in that: A first cyclone separator and a second cyclone separator are arranged on the connecting pipeline of the catalytic oxidation reactor and the condenser and the chimney, respectively. The solid outlets of the first cyclone separator and the second cyclone separator are connected to a catalyst recovery tank. A first induced draft fan is arranged on the connecting pipeline of the first cyclone separator and the condenser, and a second induced draft fan is arranged on the connecting pipeline of the second cyclone separator and the chimney.

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