CN211216073U - Purification system combining hollow fiber membrane dust collector and activated carbon gas treatment device - Google Patents
Purification system combining hollow fiber membrane dust collector and activated carbon gas treatment device Download PDFInfo
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- CN211216073U CN211216073U CN201922205295.7U CN201922205295U CN211216073U CN 211216073 U CN211216073 U CN 211216073U CN 201922205295 U CN201922205295 U CN 201922205295U CN 211216073 U CN211216073 U CN 211216073U
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Abstract
The hollow fiber dust remover and the active carbon gas treatment device are combined to form the purification system. And a fixed bed flue gas purification system combining the hollow fiber membrane dust collector and the activated carbon fiber gas treatment device. The dust remover with the hollow fiber membrane filter element purifies the flue gas dust and the absorbent dust to microgram level, and then the flue gas dust and the absorbent dust are sent to an active carbon gas treatment device for treatment, so that the service life of active carbon or active carbon fiber is greatly prolonged, and the purity of emission is improved.
Description
Technical Field
The hollow fiber dust remover and the active carbon gas treatment device are combined to form the purification system. In particular to a flue gas purification system which combines a high-purity dust treatment device of a hollow fiber membrane filter element and a device which integrally removes pollutants such as oxysulfide, nitric oxide, hydrogen fluoride, dioxin, mercury and the like by utilizing active carbon and active carbon fiber.
Background
Although activated carbon has good adsorption and catalytic functions and has been used for treating gas pollutants for a long time, the activated carbon is not generally used for integrally removing pollutants such as sulfur oxides, nitrogen oxides, hydrogen fluoride, dioxin, mercury and the like in industries such as power generation, sintering, cement, electrolytic aluminum, waste incineration and the like on a large scale. One important reason is that the dust blocks the activated carbon, which greatly reduces the service life of the activated carbon.
The common devices are treated by a bag-type dust collector and then enter the activated carbon integrated desulfurization and denitrification device. Whereas the dust concentration after bag-type dust removal is generally 10-20 mg/m, for a system with an air volume of 100 ten thousand m for high speed dry harvest, 10kg of dust leaks every hour, 240kg per day, 86.4-172 tons of dust per year, and the dust is the finest dust which can penetrate through a dust remover, so that thousands of tons of activated carbon are blocked and failed. For example, the flue gas treatment of a certain power plant consumes 2.5 million tons of activated carbon every year, and the value is billion yuan. The method becomes a key obstacle for limiting the wide application of the activated carbon in flue gas desulfurization and denitrification in the heavy pollution industry.
The core for solving the problems is to reduce the content of dust in the flue gas entering the activated carbon desulfurization and denitrification device, and the content is preferably less than 10-100 micrograms. It has not been possible to accomplish this task with existing bag-type dust collectors.
Disclosure of Invention
The self-Guoshaohua technology for treating flue gas by using the hollow fiber membrane filter element at high purity improves the dust treatment precision by 1000 times compared with the best bag-type dust remover under the condition of equivalent wind resistance, and stably reaches microgram level. The invention aims to combine the hollow fiber membrane dust removal technology with the activated carbon desulfurization and denitrification technology, solve the problem that the activated carbon is blocked, and form a novel flue gas treatment device integrating dust, sulfur, nitrate, mercury and dioxin removal.
The purification system combining the hollow fiber membrane dust remover and the activated carbon gas treatment device comprises a hollow fiber membrane filter element dust remover and an activated carbon gas treatment device;
the hollow fiber membrane filter element dust remover comprises a flue gas inlet pipe, a mixer, an adsorption powder spraying port, a hollow fiber membrane filter element assembly, a back flushing device and an air outlet valve;
the activated carbon gas treatment device comprises an activated carbon desulfurization part, an activated carbon SCR denitration part, an ammonia injection port, a steam generator, an acid gas condensation recoverer, an activated carbon feeding port and an activated carbon discharging port;
the purification system of the combination of the hollow fiber dust remover and the active carbon gas treatment device is characterized in that: the hollow fiber membrane filter element deduster is arranged in front of the activated carbon gas treatment device, dust in flue gas and the adsorbent which adsorbs harmful gas-phase substances are filtered by the hollow fiber membrane filter element deduster to below 0.5-100 ug/m for flowering, and then the flue gas is sent to the activated carbon gas treatment device for desulfurization, denitration and demercuration;
the front end of the hollow fiber membrane filter element dust remover is sequentially provided with a flue gas inlet pipe and a mixer, the mixer is provided with an adsorption powder spraying inlet, an activated carbon adsorbent or an alumina powder adsorbent is sprayed into the mixer from the adsorption powder spraying inlet, flue gas is mixed with the adsorbent in the mixer and then enters the hollow fiber membrane filter element dust remover, a cabinet of the hollow fiber membrane filter element dust remover is internally provided with a matrix consisting of hollow fiber membrane filter element assemblies, the activated carbon adsorbent absorbs most dioxin in the flue gas, the alumina powder adsorbent absorbs most hydrogen fluoride in the flue gas, the adsorbent absorbing harmful gases and dust in the flue gas are intercepted by the hollow fiber membrane filter element, deposited on the surface of membrane wires of the hollow fiber membrane filter element and blown down by a back blowing device arranged at the end part of the hollow fiber membrane filter element assembly;
description of the drawings: therefore, the adsorbent is introduced into the mixer to adsorb most dioxin or hydrogen fluoride in advance, but not to be reserved for the following activated carbon to be treated together, and leakage and diffusion can be avoided only by intercepting and collecting the high-risk substances with the hollow fiber membrane filter element at high precision.
The air outlet end of the hollow fiber membrane filter element dust remover outputs flue gas with dust content lower than 0.5-100 ug/m, the flue gas is connected with an active carbon desulfurization part of the active carbon gas treatment device through an air outlet valve, the active carbon desulfurization part is connected with an active carbon SCR denitration part through a pipeline, and the flue gas after desulfurization is in contact with and reacts with ammonia entering from the ammonia injection port in the active carbon SCR denitration part to realize denitration;
the activated carbon gas treatment device is an activated carbon fixed bed or a fluidized bed.
Further, the purification system combining the hollow fiber dust collector and the activated carbon gas treatment device according to the present invention is characterized in that: the activated carbon gas treatment device and the hollow fiber dust scrubber jointly form a flue gas treatment system, and is a fixed bed flue gas treatment device using activated carbon fibers as filler, and the fixed bed flue gas treatment device and the activated carbon fiber gas treatment device jointly form a fixed bed flue gas purification system combining the hollow fiber dust scrubber and the activated carbon fiber gas treatment device.
Description of the drawings: the activated carbon fiber is activated carbon-containing fiber, has a very large specific surface area (1000-3000 square meters per gram) and abundant micropores, and the volume of the micropores accounts for more than 90% of the total pore volume. Activated carbon fibers have a greater adsorption capacity and faster adsorption kinetics than conventional granular activated carbon. However, it is more prone to clogging by dust and cannot be used in a fluidized bed. The permanent operation can be realized only under two working conditions of microgram level and fixed bed. The invention aims to combine the purification treatment precision of the hollow fiber dust collector with the excellent performance of the activated carbon fiber, avoid the damage of the fluidized bed to the activated carbon fiber and form a novel flue gas purification system combining the hollow fiber dust collector and the activated carbon fiber gas treatment device.
Drawings
Fig. 1 is a schematic view showing an example of a purification system in which a hollow fiber dust collector and an activated carbon gas treatment device are combined according to the present invention. Wherein: (1) an ash conveying device; (2) a hollow fiber membrane filter element dust remover; (3) a flue gas inlet pipe; (4) a mixer; (5) an adsorption powder injection port; (6) an ammonia injection port; (7) an activated carbon SCR denitration part; wherein the filler is granular activated carbon or activated carbon fiber; (8) an air outlet valve; (9) an activated carbon feed port; (10) a gas-liquid valve; (11) the active carbon desulfurization part, wherein the filler is granular active carbon or active carbon fiber; (12) an acid gas condensation and recovery device; (13) a steam generator; (14) a discharge hole of the activated carbon; (17) hollow fiber membrane cartridge assemblies.
Detailed Description
The desulfurization, denitrification and demercuration of the activated carbon are mature technologies, and 99 percent of desulfurization and 90 percent of denitrification can be realized in a laboratory. However, large-scale on-site implementation of power generation, coking, cement, sintering, electrolytic aluminum, waste incineration and the like has considerable difficulty, and the main problem is dust blockage.
The essence of the invention is that the hollow fiber film dust collector replaces the original cloth bag dust collector, and the precision of dust treatment is improved to microgram level.
1-2 ug/m, for a system with an air volume of 100 ten thousand m, 1g leaks out every hour, 24g each day, 8-17 kg dust each year, and only accounts for 4 ten thousandths of 2 ten thousand tons of activated carbon, which is negligible.
According to the small experimental device manufactured according to the principle of the invention, the dust content actually sent to the active carbon link is 0.5-2 ug/m for high speed cultivation, which is close to the purity of standard gas in a laboratory.
Thus, the life of the activated carbon is already independent of the dust content of the flue gas and a fixed bed can be used. Not only the covering and the blocking of the dust to the activated carbon are avoided, but also the abrasion consumption of the fluidized bed to the activated carbon is greatly reduced, the process flow and the energy consumption are reduced, and the activated carbon, especially the activated carbon fiber, is applied to the flue gas treatment on a large scale, thereby opening up a road.
The novel small-sized experimental device of the purification system combining the hollow fiber membrane dust collector and the activated carbon fiber gas treatment device manufactured according to the principle of the invention has the desulfurization efficiency of 99 percent and the denitration efficiency of 90 percent and longer service life.
Claims (2)
1. The purification system combining the hollow fiber membrane dust remover and the activated carbon gas treatment device comprises a hollow fiber membrane filter element dust remover and an activated carbon gas treatment device;
the hollow fiber membrane filter element dust remover comprises a flue gas inlet pipe, a mixer, an adsorption powder spraying port, a hollow fiber membrane filter element assembly, a back flushing device and an air outlet valve;
the activated carbon gas treatment device comprises an activated carbon desulfurization part, an activated carbon SCR denitration part, an ammonia injection port, a steam generator, an acid gas condensation recoverer, an activated carbon feeding port and an activated carbon discharging port;
the purification system of the combination of the hollow fiber dust remover and the active carbon gas treatment device is characterized in that: the hollow fiber membrane filter element deduster is arranged in front of the activated carbon gas treatment device, dust in flue gas and the adsorbent which adsorbs harmful gas-phase substances are filtered by the hollow fiber membrane filter element deduster to below 0.5-100 ug/m for flowering, and then the flue gas is sent to the activated carbon gas treatment device for desulfurization, denitration and demercuration;
the front end of the hollow fiber membrane filter element dust remover is sequentially provided with a flue gas inlet pipe and a mixer, the mixer is provided with an adsorption powder spraying inlet, an activated carbon adsorbent or an alumina powder adsorbent is sprayed into the mixer from the adsorption powder spraying inlet, flue gas is mixed with the adsorbent in the mixer and then enters the hollow fiber membrane filter element dust remover, a cabinet of the hollow fiber membrane filter element dust remover is internally provided with a matrix consisting of hollow fiber membrane filter element assemblies, the activated carbon adsorbent absorbs most dioxin in the flue gas, the alumina powder adsorbent absorbs most hydrogen fluoride in the flue gas, the adsorbent absorbing harmful gases and dust in the flue gas are intercepted by the hollow fiber membrane filter element, deposited on the surface of membrane wires of the hollow fiber membrane filter element and blown down by a back blowing device arranged at the end part of the hollow fiber membrane filter element assembly;
the air outlet end of the hollow fiber membrane filter element dust remover outputs flue gas with dust content lower than 0.5-100 ug/m, the flue gas is connected with an active carbon desulfurization part of the active carbon gas treatment device through an air outlet valve, the active carbon desulfurization part is connected with an active carbon SCR denitration part through a pipeline, and the flue gas after desulfurization is in contact with and reacts with ammonia entering from the ammonia injection port in the active carbon SCR denitration part to realize denitration.
2. The purification system of claim 1 in combination with an activated carbon gas treatment device, wherein: the activated carbon gas treatment device and the hollow fiber dust scrubber jointly form a flue gas treatment system, and is a fixed bed flue gas treatment device using activated carbon fibers as filler, and the fixed bed flue gas treatment device and the activated carbon fiber gas treatment device jointly form a fixed bed flue gas purification system combining the hollow fiber dust scrubber and the activated carbon fiber gas treatment device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110743318A (en) * | 2019-12-11 | 2020-02-04 | 广东风和洁净工程有限公司 | Purification system combining hollow fiber membrane dust collector and activated carbon gas treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110743318A (en) * | 2019-12-11 | 2020-02-04 | 广东风和洁净工程有限公司 | Purification system combining hollow fiber membrane dust collector and activated carbon gas treatment device |
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