CN212962905U - Temperature control system of carbon black drying waste gas - Google Patents
Temperature control system of carbon black drying waste gas Download PDFInfo
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- CN212962905U CN212962905U CN202020857590.0U CN202020857590U CN212962905U CN 212962905 U CN212962905 U CN 212962905U CN 202020857590 U CN202020857590 U CN 202020857590U CN 212962905 U CN212962905 U CN 212962905U
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Abstract
A temperature control system for carbon black drying waste gas comprises a tail gas combustion furnace, a drying fire box and a dryer, wherein the tail gas combustion furnace is connected with the drying fire box; the drying fire box is provided with a high-temperature drying gas leading-out pipeline, the leading-out pipeline is connected to the middle of the drying machine fire box and is provided with a third control valve, the first control valve and the third control valve are connected to a pressurizing fan after being converged through pipelines, and the pressurizing fan is connected to the waste pulse box body through a pipeline. The utility model discloses a regulation and control to first, third control valve improves the dry exhaust gas temperature to the technological requirement of exhaust gas forced draught fan import department, reduces the formation of sulfurous acid, prolongs the life of useless arteries and veins box and filter bag.
Description
Technical Field
The utility model relates to an industrial waste gas temperature control field, concretely relates to temperature control system of dry waste gas of carbon black.
Background
In the current domestic wet-process carbon black granulation production process, carbon black forms small carbon black particles in a wet-process granulator and flows into a roller dryer, and the wet particles are gradually dried in the process of flowing in the roller by heat provided by a drying fire box. The heat source in the drying fire box is from a tail gas combustion furnace, and the tail gas combustion furnace uses carbon black tail gas as fuel. And (3) conveying waste gas containing carbon black generated in the drying process of the dryer to a waste gas bag filter through a pressurizing fan to perform carbon-gas separation, attaching the carbon black to a filter bag, periodically blowing by compressed air to enable the carbon black to fall into a cone hopper, and introducing the carbon black into an air conveying system through an airtight valve to form closed circulation.
The water content of the waste gas from the carbon black dryer is very high, the waste gas entering the waste gas pulse bag filter contains corrosive gases such as sulfur dioxide, when the temperature is too low, water vapor in the dried waste gas is condensed and separated out, sulfurous acid is generated with the corrosive gases such as sulfur dioxide to accelerate the corrosion of the box body of the waste bag filter, the service life of the waste bag filter is influenced, and therefore the temperature of the dried waste gas is required to be not lower than 204 ℃. In the original design, a pipeline is led out from the front of a first control valve at the rear end of a drying roller, and high-temperature dry gas at about 550 ℃ in a drying fire box is connected to an inlet of a waste gas pressurizing fan and is controlled by a third control valve, so that the temperature of the waste gas entering a waste gas bag filter is increased.
However, in the using process, the temperature of the dry waste gas at the inlet of the pressurizing fan can not reach the specified temperature (more than 204 ℃), so that the corrosion of the equipment is accelerated, and the filter bag is frequently replaced, so that the production can not be continuously and stably, and the quality of the carbon black is influenced.
Disclosure of Invention
The utility model provides a temperature control system of dry waste gas of carbon black, further elucidate this technical scheme next.
A temperature control system for carbon black drying waste gas comprises a tail gas combustion furnace, a drying fire box and a dryer, wherein the tail gas combustion furnace is connected with the drying fire box; the drying fire box is characterized in that a pipeline is led out from the middle of the drying fire box, the leading-out pipeline is connected to the middle of the drying fire box and is provided with a third control valve, the first control valve and the third control valve are connected to a pressurizing fan after being converged through pipelines, and the pressurizing fan is connected to the waste pulse box body through a pipeline.
Optionally, the dried exhaust gas at 120 ℃ from the first control valve is mixed with the high-temperature dried gas at 800 ℃ or higher from the third control valve, a temperature sensor is arranged in a pipeline through which the dried exhaust gas flows, the temperature sensor and the third control valve are connected with the controller, and the opening degree of the third control valve is controlled by the controller; the potential safety hazard caused by overhigh temperature of the dry waste gas flow is avoided.
Optionally, the first control valve is connected to a controller; the whole control effect is achieved.
Has the advantages that: compared with the prior art, the utility model discloses can stabilize, controllably improve the exhaust gas temperature of dry waste gas forced draught fan import department, reduce the formation of sulfurous acid, prolong the life of useless arteries and veins box and filter bag.
Drawings
FIG. 1: the structure of the utility model is shown schematically;
in the figure: the tail gas drying device comprises a tail gas combustion furnace 1, a dryer 2, a first control valve 3, a second control valve 4, a third control valve 5, a booster fan 6, a waste pulse box body 7, a temperature sensor 8, a controller 9 and a drying fire box 10.
Detailed Description
A specific embodiment of the present invention will now be described in detail with reference to fig. 1.
Through the analysis of the background technology, the problem that exists at present is that the temperature of the dry waste gas is often lower than 204 ℃, and the sulfur dioxide and the condensed and separated liquid water react to produce sulfurous acid to further corrode a waste vein box body and a filter bag.
A temperature control system for carbon black drying waste gas comprises a tail gas combustion furnace 1, a drying fire box (10) and a dryer 2, wherein high-temperature drying gas generated by the tail gas combustion furnace 1 enters the drying fire box (10) to dry carbon black wet particles in the dryer (2); the drying machine 2 is connected with a first control valve 3 through a pipeline, and the drying fire box (10) is connected with a third control valve 5 through a pipeline.
Because the positions of the first control valve 3 and the second control valve 4 on the drying system are different according to the process requirements, the temperature of the waste gas passing through the first control valve 3 is about 120 ℃, the temperature of the high-temperature drying gas passing through the second control valve 4 is about 550 ℃, and in the prior art, a pipeline is led out from a pipeline between the drying fire box (10) and the second control valve 4, and a third control valve 5 is arranged on the pipeline to mix the drying waste gas and part of the high-temperature drying gas.
In this embodiment, a high-temperature dry gas pipeline is led out from the dry fire box 10, the led-out pipeline is connected to the middle of the dry fire box 10, the temperature is above 800 ℃, a third control valve 5 is arranged on the led-out pipeline, the first control valve 3 and the third control valve 5 are connected to a booster fan 6 after being converged through pipelines, and the booster fan 6 is connected to a waste pulse box body 7 through a pipeline. Based on the technical scheme, the dry waste gas with the temperature of 120 ℃ from the first control valve 3 is mixed with the high-temperature dry gas with the temperature of more than 800 ℃ from the third control valve 5, so that the temperature of the mixed dry waste gas is maintained at 210-230 ℃, and the generation of sulfurous acid is inhibited.
In order to further ensure that the temperature of the mixed dry waste gas is maintained within 210-230 ℃, a temperature sensor 8 is arranged in a pipeline through which the mixed dry waste gas flows, the temperature sensor 8 and the third control valve 4 are connected with a controller 9, the controller 9 controls the opening of the third control valve 5, and the flow of the high-temperature air flow at 800 ℃ is changed, so that the temperature of the mixed dry waste gas is changed. The purpose of this arrangement is to avoid safety hazards arising from the temperature of the mixed gas stream being too high, since the ignition point of most combustible objects is around 300 ℃, such as the filter bag in the waste vein box 7.
Preferably, the first control valve 3 is connected to the controller 9, so as to achieve the overall control effect and not affect other gas leading-out lines.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A temperature control system for carbon black drying waste gas comprises a tail gas combustion furnace (1), a drying fire box (10) and a dryer (2), wherein the tail gas combustion furnace (1) is connected with the drying fire box (10), the dryer (2) is arranged in the drying fire box (10), and the dryer (2) is connected with a first control valve (3) through a pipeline; the method is characterized in that: the drying fire box (10) is provided with a high-temperature drying gas leading-out pipeline, the leading-out pipeline is connected to the middle of the drying fire box (10) and is provided with a third control valve (5), the first control valve (3) and the third control valve (5) are connected to a booster fan (6) after being converged through pipelines, and the booster fan (6) is connected to a waste pulse box body (7) through a pipeline.
2. The system for controlling temperature of exhaust gas from carbon black drying according to claim 1, wherein: the dry waste gas with the temperature of 120 ℃ from the first control valve (3) is mixed with the high-temperature dry gas with the temperature of more than 800 ℃ from the third control valve (5), a temperature sensor (8) is arranged in a pipeline through which the mixed dry waste gas flows, the temperature sensor (8) and the third control valve (5) are connected with a controller (9), and the opening degree of the third control valve (5) is controlled through the controller (9).
3. The system for controlling temperature of exhaust gas from carbon black drying according to claim 2, wherein: the first control valve (3) is connected to a controller (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020857590.0U CN212962905U (en) | 2020-05-20 | 2020-05-20 | Temperature control system of carbon black drying waste gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020857590.0U CN212962905U (en) | 2020-05-20 | 2020-05-20 | Temperature control system of carbon black drying waste gas |
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| CN202020857590.0U Active CN212962905U (en) | 2020-05-20 | 2020-05-20 | Temperature control system of carbon black drying waste gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739561A (en) * | 2021-07-26 | 2021-12-03 | 乌海黑猫炭黑有限责任公司 | Carbon black desiccator's anti-corrosion device |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739561A (en) * | 2021-07-26 | 2021-12-03 | 乌海黑猫炭黑有限责任公司 | Carbon black desiccator's anti-corrosion device |
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