Semi-dry process smoke eliminator with independent temperature-reducing column

A flue gas purification, semi-dry technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problem that the purification process cannot continue, the energy consumption of flue gas purification increases, and the quality of flue gas purification is affected. problems, to achieve the effect of greatly reducing the amount of daily maintenance, improving the processing capacity, and eliminating the sticky wall scaling

Active Publication Date: 2009-01-14
HANGZHOU NEW CENTURY ENERGY ENVIRONMENTAL PROTECTION ENG CO LTD
View PDF1 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing flue gas purification device sprays desuperheating water and lime dry powder or slurry into the reaction tower at the same time, removes HCL, SOx, and HF through neutralization reaction, and then removes heavy metals and dioxins by reducing the temperature and adsorbing activated carbon. A better flue gas purification effect is achieved; but it also has the following problems in use: 1) The current waste incineration boiler can only use a higher exhaust gas temperature in order to prevent corrosion of the heating surface at the tail of the waste heat boiler, resulting in The temperature of the flue gas purification device is very high; however, it has been confirmed from relevant theories and experiments that whether it is the neutralization and deacidification reaction of the flue gas or the removal of dioxins and heavy metals in the flue gas, their effects are all with the flue gas Decrease with increasing temperature
Therefore, for the neutralization and deacidification reaction tower in the existing flue gas purification device, a large amount of desuperheating water must be added for cooling; etc., and with the rotation of the airflow, it is thrown to the tower wall, and the fly ash bridges or sticks into scale on the inner wall of the reaction tower; the result not only affects the quality of flue gas purification, but also increases the resistance of flue gas movement, so that the flue gas The energy consumption of gas purification increases; 2) A large amount of desuperheating water entering the reaction tower also increases the humidity of the flue gas coming out of the reaction tower, resulting in further increase in the resistance of the subsequent bag filter and flue gas purification. The purification process cannot continue due to the severe bagging of the bag filter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Semi-dry process smoke eliminator with independent temperature-reducing column
  • Semi-dry process smoke eliminator with independent temperature-reducing column
  • Semi-dry process smoke eliminator with independent temperature-reducing column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the structure of the semi-dry flue gas purification device with independent desuperheating tower in this embodiment can be referred to in Fig. 1, and it comprises a reaction tower with the inlet smoke box 2a of the bottom, the flue gas outlet 2d of the top 2. At the bottom of the reaction tower, there is a Venturi-shaped tower wall with a constriction section 2b and a diffusion section 2f, which can make the flue gas inject at low resistance and high speed, and set two on the tower wall below the diffusion section 2f. The first-stage water spraying device 2c, the nozzle pipe 2e for dry lime powder and returned ash is provided on the tower wall above the diffusion section 2f, and the inertial separator 3 and activated carbon mixing are sequentially connected between its flue gas outlet 2d and the induced draft fan 5 device 5, bag filter 7, and the detector (not shown in the figure) that can measure temperature and acidity on-line; What is different from exis...

Embodiment 2

[0034] Embodiment 2, the structure of the semi-dry flue gas purification device that this embodiment has independent desuperheating tower can be seen from Fig. 1 and Fig. 3, and its difference with embodiment 1 is: this embodiment has independent The semi-dry flue gas purification device of the desuperheating tower is equipped with a flow equalization device on the inner wall 1h of the flue gas inlet end of the desuperheating tower. The device includes a boiler flue gas inlet pipe 1a installed on the inner wall of the flue gas inlet end 1h A circular casing 1g connected in a tangential direction, and a group of radial blades 1b distributed uniformly along the circumferential direction in the casing. The high-temperature boiler flue gas entering from the flue gas inlet port 1h of the desuperheating tower 1 passes through the gap between two adjacent blades 1b, and the flue gas is evenly dispersed into the desuperheating tower without bias flow; therefore, the flue gas and desupe...

Embodiment 3

[0035] Embodiment 3, present embodiment has the structure shown in Fig. 2 and Fig. 4~Fig. The difference is that it includes a volute casing 1g installed on the inner wall of the flue gas inlet end 1h of the desuperheating tower, which is in tangential communication with the boiler flue gas inlet pipe 1a, and a set of self-centered casings in the casing. Make the blade 1b that tangentially diverges outward. The high-temperature boiler flue gas entering from the flue gas inlet port 1h of the desuperheating tower 1 also passes through the gap between two adjacent blades 1b, and rotates along the tangential direction of the blades to enter the desuperheating tower. After the exchange, the temperature is lowered, and the cooling effect is good. At the same time, the fly ash in the flue gas is separated immediately, and the concentration of the flue gas dust is also reduced by 5-10%. The separated fly ash sinks in the tower, enters the ash hopper 1f at the bottom, and is discharge...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a smoke gas purification device by a semidry process, which is provided with an independent desuperheating tower, comprising a reaction tower provided with an smoke inlet box, a smoke gas outlet, a venturi tube type tower wall arranged on a tower bottom, a water injector arranged on the tower wall and a nozzle for lime dry powder and revert dust; and the smoke gas outlet is connected with an inertia separator, an activated carbon mixer, a bag-type dust remover and a draught fan. The invention is characterized in that the invention is also provided with the desuperheating tower which is provided with a boiler smoke gas inlet manifold, a single-stage water injector, an ash bucket with an ash hole and a gas flue; the gas flue of the desuperheating tower is connected with the smoke inlet box into one unit. The boiler smoke gas disperses within the two towers for cooling, thereby improving the adaptability of a system to a load; the boiler smoke gas particularly can be cooled down urgently to a set temperature in the desuperheating tower; and the reaction tower can be humidified only by evaporation with a little water to complete a deacidifying reaction and remove dioxin, thereby avoiding the disadvantages of scale formation on the tower wall of the prior reaction tower and bag burning of the bag-type dust remover, guaranteeing a sustaining and stable smoke purification process and having the advantages of good purification effect and low energy consumption.

Description

technical field [0001] The invention relates to a semi-dry flue gas purification device, in particular to a device capable of effectively preventing fouling on the inner wall of its reaction tower and pasting bags of a bag dust collector, thereby ensuring continuous and stable flue gas purification process, good purification effect and low energy consumption A semi-dry flue gas purification device with an independent desuperheating tower. technical background [0002] At present, the flue gas purification device used for domestic waste incineration is a semi-dry flue gas purification device including a reaction tower for flue gas deacidification and a bag filter for dust removal. For example, the application number in the Chinese patent is 200610052126.9 "Flue Gas Purification Device of Domestic Waste Incinerator", which includes a reaction tower with a flue gas inlet pipe, a slag outlet, a nozzle for dry lime powder and returned ash, and a flue gas outlet, and a set of reac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80
Inventor 张星群王柯方涛任少清程仲宽
Owner HANGZHOU NEW CENTURY ENERGY ENVIRONMENTAL PROTECTION ENG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap