CN219186423U

CN219186423U - High-activity calcium-based desulfurization system suitable for multiple industries

Info

Publication number: CN219186423U
Application number: CN202222402209.3U
Authority: CN
Inventors: 尹华改
Original assignee: Hunan Zhongke Chucai Environmental Technology Co ltd
Current assignee: Hunan Zhongke Chucai Environmental Technology Co ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-06-16
Anticipated expiration: 2032-09-09

Abstract

The utility model relates to the technical field of high-activity calcium-based desulfurization systems, and discloses a high-activity calcium-based desulfurization system suitable for multiple industries, which comprises a desulfurization reactor, wherein an inlet of the desulfurization reactor is connected with a flue of a waste heat boiler, an outlet of the desulfurization reactor is fixedly connected with a bag-type dust remover, an outlet of the bag-type dust remover is provided with a denitration reactor, the bag-type dust remover is fixedly connected with the denitration reactor through the flue, an outlet of the denitration reactor is fixedly connected with a draught fan, and an outlet of the draught fan is fixedly connected with a chimney. In the utility model, the pollutant reaches extremely low standard, the reaction is completely intercepted by the bag-type dust collector for removal, and the dust is collected by the ash bucket under the bag-type dust collector and then is conveyed to an ash bin for treatment by conveying equipment. The flue gas after desulfurization and dust removal enters a denitration reactor to further remove nitrogen oxides, and the treated flue gas is sent to a chimney for emission through a fan, so that the ultra-low emission of the waste incineration power generation industry is realized.

Description

High-activity calcium-based desulfurization system suitable for multiple industries

Technical Field

The utility model relates to the technical field of high-activity calcium-based desulfurization systems, in particular to a high-activity calcium-based desulfurization system suitable for multiple industries.

Background

With the steady growth of the population of China, the continuous promotion of town and the development of economy, the economic development of China is rapid, the living standard of people is continuously improved, the production of domestic garbage in China is continuously increased, and the treatment demand is increasingly vigorous. The harmless treatment of garbage is mainly divided into three modes of incineration, landfill and composting. The incineration has the advantages of obvious reduction effect, small occupied area, relatively small influence on the environment and the like, and is the subdivision field with the fastest growth. In 2008-2020, urban garbage incineration plants in China are increased from 74 to 658. The daily treatment capacity is increased from 5.16 ten thousand tons to 73.58 ten thousand tons, and compared with developed countries, the garbage incineration treatment ratio of China is still relatively low, and the urban area is about 50.29 percent by 2020.

And secondly, in industrial production of the industrial kiln, the material or the workpiece is heated by using heat generated by fuel combustion or electric energy conversion. The industrial kiln is widely applied to industries such as steel, coking, color, building materials, petrochemical industry, chemical industry, mechanical manufacturing and the like, has an important supporting function on industrial development, and is also a main emission source of atmospheric pollution in the industrial field.

And simultaneously, the emission standard of the atmospheric pollutants is further improved in the country, and particularly in places such as Jinjin Ji, fenwei plain and the like which are under tension in the atmospheric environment in coastal areas with developed economy, the emission standard of the atmospheric pollutants is more and more strict.

The existing waste incineration power generation flue gas mainly adopts a purification process of semi-dry method (rotary spray reaction tower) +dry method (spraying calcium hydroxide) +active carbon spraying+cloth bag dust remover. The process flow has the following problems: 1) The absorbent system is easy to scale and block, and a special slurry preparation system and a slurry atomization system are required to be configured; 2) The flow rate of the flue gas in the deacidification tower is low, the diameter of the deacidification tower is large, and the system occupies relatively large area. 3) The system can generate temperature drop of 30-50 ℃, the subsequent denitration system needs to be heated, and the energy consumption is increased. 4) The common calcium-based semi-dry method has lower relative desulfurization efficiency and can not meet the requirements of increasingly strict emission standards.

The flue gas produced by the industrial kiln is mainly treated by adopting a treatment process of SDS dry desulfurization and a bag-type dust remover. The process flow has the following problems: 1) The price of the desulfurizing agent is relatively high; 2) The byproducts generated by sodium-based desulfurization are a mixture of sodium sulfate, sodium sulfite and sodium carbonate, and belong to common solid waste which is difficult to be treated in a compliance way, and the subsequent treatment is difficult. Therefore, we propose a high-activity calcium-based desulfurization system suitable for multiple industries.

Disclosure of Invention

The utility model mainly solves the technical problems existing in the prior art and provides a high-activity calcium-based desulfurization system suitable for multiple industries.

In order to achieve the above purpose, the utility model adopts the following technical scheme that the high-activity calcium-based desulfurization system suitable for multiple industries comprises a desulfurization reactor, wherein an inlet of the desulfurization reactor is connected with a flue of a furnace body, an outlet of the desulfurization reactor is fixedly connected with a bag-type dust remover, an outlet of the bag-type dust remover is provided with a denitration reactor, the bag-type dust remover and the denitration reactor are fixedly connected through the flue, an outlet of the denitration reactor is fixedly connected with an induced draft fan, an outlet of the induced draft fan is fixedly connected with a chimney, a high-activity calcium injection system is arranged at a front flue of the desulfurization reactor, and the high-activity calcium injection system comprises: the high-activity calcium storage bin, the jet fan and the ejector are fixedly arranged on the lower side of the high-activity calcium storage bin, and the jet fan is fixedly connected to the side face of the ejector.

Preferably, the high-activity calcium is dry, white and instant powder, the particle size of the powder is 20-30 mu m, the high-activity calcium has the characteristics of high porosity and high specific surface area, and the specific surface area is 35m larger ² /g。

Preferably, when the flue gas in the bag-type dust collector enters the SCR reactor, a heater is not required to be arranged, so that the flue gas is heated.

Preferably, the flow rate of the flue gas in the desulfurizing tower is 5-8 m/s, and the residence time is 2-3 s.

Preferably, the wind speed in the bag-type dust collector is 0.6-0.8 m/min.

Advantageous effects

The utility model provides a high-activity calcium-based desulfurization system suitable for multiple industries. The device comprises the following

The beneficial effects are that:

(1) When the high-activity calcium-based desulfurization system suitable for multiple industries is used, flue gas enters a desulfurization reactor from a furnace body, the flue gas is uniformly distributed in the desulfurization reactor through a guide plate, meanwhile, high-activity calcium powder stored in a high-activity calcium storage bin is purchased, sprayed into a flue through a Roots blower and an ejector, and rapidly reacts with acid gas in the flue gas to remove pollutants, the reacted powder enters a bag-type dust remover along with the flue gas, and covers the bag, the unreacted complete desulfurizing agent can further react with the acid gas to further remove the pollutants, so that the pollutants reach extremely low standard, the reacted complete desulfurizing agent is intercepted by the bag-type dust remover to be removed, and the dust is collected through an ash bucket under the bag-type dust remover and then conveyed to an ash bin for treatment through conveying equipment. The flue gas after desulfurization and dust removal enters a denitration reactor to further remove nitrogen oxides, and the treated flue gas is sent to a chimney for emission through a fan, so that the ultra-low emission of the waste incineration power generation industry is realized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments can be derived from the drawings provided without the inventive effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.

FIG. 1 is a diagram of a high activity calcium-based dry desulfurization system of the present utility model.

Legend description:

1. a desulfurization reactor; 2. a high-activity calcium storage bin; 3. a jet fan; 4. an ejector; 5. a bag-type dust collector; 6. a denitration reactor; 7. an induced draft fan; 8. and (5) a chimney.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: the utility model provides a high activity calcium-based desulfurization system suitable for multi-industry, as shown in fig. 1, including desulfurization reactor 1, desulfurization reactor 1's import links to each other with the furnace body flue, the furnace body is exhaust-heat boiler or industrial kiln, desulfurization reactor 1's export fixedly connected with sack cleaner 5, sack cleaner 5's export is provided with denitration reactor 6 and sack cleaner 5 and denitration reactor 6 pass through flue fixed connection, the setting of reactor can be changed according to the project needs in the denitration reactor 6, sack cleaner 5 and denitration reactor 6 are the prior art and do not make detailed here, the export fixedly connected with draught fan 7 at denitration reactor 6, draught fan 7 and chimney 8 are the prior art and do not make detailed here, be provided with high activity calcium injection system at desulfurization reactor 1's front portion flue, high activity calcium injection system includes: the high-activity calcium storage bin 2, the spray fan 3 and the sprayer 4, the high-activity calcium storage bin 2 is a cylindrical bin body, wherein the high-activity calcium is dry and white instant powder, the particle size of the powder is 20-30 mu m, the sprayer 4 is fixedly arranged on the lower side of the high-activity calcium storage bin 2, and the spray fan 3 is fixedly connected to the side face of the sprayer 4.

When in use, the flue gas to be treated and the high-activity calcium powder enter the desulfurization reactor 1 together, and pollutants in the flue gas and the high-activity calcium powder are mixed with each otherThe highly active calcium reaction is removed. The flow rate of the flue gas in the desulfurizing tower is 5-8 m/s, and the residence time is 2-3 s; the flue gas enters a bag-type dust remover 5 from the outlet of the desulfurization reactor 1 through a flue, dust in the flue gas is attached to a bag to form desulfurization ash, and unreacted desulfurizing agent can further react with SO in the flue gas ₂ The reaction further reduces the emission concentration, the filtering wind speed of the bag-type dust collector is 0.6-0.7 m/min, and the enough residence time is ensured to ensure dust and SO ₂ The flue gas after desulfurization and dust removal enters the denitration reactor 6, the outlet of the denitration reactor 6 is connected with the inlet of the fan 7, the outlet of the fan 7 is connected with a chimney, the flue gas is discharged into the atmosphere, nitrogen oxides in the flue gas are reacted with ammonia gas of a person spraying to be removed, the flue gas can ensure better operation of the catalyst after desulfurization and dust removal, and due to dry desulfurization, the system temperature is reduced, the denitration can be performed by using the catalyst with low temperature without further heating and temperature rising, the operation cost is reduced, and the SO in the discharged flue gas is ensured ₂ The concentration of the nitrogen oxide is less than 35mg/Nm3, the dust concentration is less than 10mg/Nm3, the nitrogen oxide concentration is less than 50mg/Nm3, and the ultra-low emission of the waste incineration power generation industry is realized.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Claims

1. The utility model provides a high activity calcium-based desulfurization system suitable for multi-industry, includes desulfurization reactor (1), its characterized in that: the inlet of desulfurization reactor (1) links to each other with the furnace body flue, the export fixedly connected with sack cleaner (5) of desulfurization reactor (1), the export of sack cleaner (5) is provided with denitration reactor (6) and sack cleaner (5) and denitration reactor (6) pass through flue fixed connection, the export fixedly connected with draught fan (7) at denitration reactor (6), the export fixedly connected with chimney (8) of draught fan (7), the anterior flue at desulfurization reactor (1) is provided with high-activity calcium injection system, high-activity calcium injection system includes: the high-activity calcium storage bin (2), the jet fan (3) and the ejector (4), wherein the ejector (4) is fixedly arranged at the lower side of the high-activity calcium storage bin (2), and the jet fan (3) is fixedly connected to the side face of the ejector (4).

2. A high activity calcium-based desulfurization system for use in multiple industries according to claim 1, wherein: the high-activity calcium is dry and white instant powder, the particle size of the powder is 20-30 mu m, the high-activity calcium has the characteristics of high porosity and high specific surface area, and the specific surface area is 35m larger ² /g。

3. A high activity calcium-based desulfurization system for use in multiple industries according to claim 2, wherein: when the flue gas in the bag-type dust collector (5) enters the denitration reactor (6), a heater is not required to be arranged, so that the flue gas is heated.

4. A high activity calcium-based desulfurization system according to claim 3, suitable for use in a plurality of industries, wherein: the flow rate of the flue gas in the desulfurization reactor (1) is 5-8 m/s, and the residence time is 2-3 s.

5. A high activity calcium-based desulfurization system for use in multiple industries according to claim 4, wherein: the wind speed in the bag-type dust collector (5) is 0.6-0.8 m/min.