Unlock instant, AI-driven research and patent intelligence for your innovation.

Boiler flue gas treatment device and method

A boiler flue gas and treatment method technology, which is applied in the direction of gas treatment, combined devices, separation methods, etc., can solve the problems of inability to achieve high efficiency and energy saving, high investment and operation costs, and large building area, and achieve the best desulfurization effect, investment and cost. Low operating cost and high denitrification efficiency

Pending Publication Date: 2017-05-10
浙江嘉化能源化工股份有限公司
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If two independent industrial systems are simply combined, not only the system is complex, the equipment is large, the building area is large, the investment and operating costs are high, and the simple combination of two independent systems cannot achieve high efficiency, energy saving and environmental protection.

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
  • Boiler flue gas treatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Send the full load of fuel to the boiler for combustion, and generate flue gas in the boiler furnace, the flue gas volume is 46200Nm 3 / hr, the flue gas temperature is 850°C~1100°C, after passing through the first area of ​​the SNCR, the reducing agent is ammonia, the concentration of ammonia water is 20%, the expected flow rate is 1022.1kg / Hr, the ammonia reducing agent is distributed to each spray gun through the module, and through a A special spray gun specially used for ammonia reducing agent solution is sprayed in, and a small amount of compressed air is used to atomize the ammonia solution, and air with a certain pressure and flow rate provided by the compressed air pipe network is used as a package to carry the atomized ammonia reducing agent. Injected into the furnace, and the NO in the flue gas X N 2 and HO 2 , the flue gas mixture that comes out goes through the SNCR zone 2 and SNCR zone 3 for multiple de-stocking treatments, and then enters the SCR zone in...

Embodiment 2

[0083] Process is identical with embodiment 1, and each process parameter is:

[0084] Ammonia reducing agent choose ammonia water

[0085] Flue gas volume: 46200Nm3 / hr

[0086] Flue gas temperature is 850℃~894℃

[0087] The flue gas temperature at the inlet of the separator is 850℃~901℃

[0088] The temperature of the flue gas at the outlet of the separator is 710 ° C ~ 888 ° C

[0089] Ammonia concentration is 20%

[0090] Expected flow 900.1kg / Hr

[0091] The flue gas temperature at the inlet of the desulfurization tower is 0℃~350℃

[0092] Measured SO 2 Emission concentration is 40mg / Nm 3 , the removal rate is 98.1%, the treated NO X The baseline concentration is 84mg / Nm 3 , The removal rate is 80%.

Embodiment 3

[0094] Process is identical with embodiment 1, and each process parameter is:

[0095] Amino reducing agent choose urea

[0096] Flue gas volume: 46200Nm 3 / hr

[0097] Flue gas temperature is 900℃~1150℃

[0098] The flue gas temperature at the inlet of the separator is 900℃~1150℃

[0099] The temperature of the flue gas at the outlet of the separator is 810 ° C ~ 1000 ° C

[0100] Ammonia concentration is 20%

[0101] Expected flow 1000.1kg / Hr

[0102] The flue gas temperature at the inlet of the desulfurization tower is 0℃~350℃

[0103] Measured SO 2 The emission concentration is 48mg / Nm 3 , the removal rate is 98%, the treated NO X The baseline concentration was 90mg / Nm3, and the removal rate was 79%.

[0104] In the present invention, the desulfurization slurry is the prior art. For example, the slurry may consist primarily of a mixture of various salts (MgSO 4 , CaCl 2 ), gypsum particles, limestone particles, CaF 2 and ash particles.

[0105] Certainly, th...

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 discloses a boiler flue gas treatment device and method. The method comprises the following steps: a, performing denitration treatment: performing denitration treatment on flue gas in a boiler (2) for multiple times, and entering a desulfuration treatment step; and b, performing desulfuration treatment: enabling the flue gas treated in the step a to be in sufficient contact with slurry to perform the desulfuration treatment, thereby completing the boiler flue gas treatment method. According to the boiler flue gas treatment method disclosed by the invention, an SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) hybrid denitration technology and a single-tower double-cycle limestone-plaster wet desulfuration technology are adopted, and an SNCR region and an SCR region are dispersed in a boiler furnace and a coal economizer in a multi-angle mode, and a spray layer adopts a multi-time spraying mode, so that the flue gas is in contact with an amino reducer and an absorbent in a multi-angle reversing mode.

Description

technical field [0001] The invention belongs to the technical field of industrial boiler desulfurization and desulphurization treatment devices, and in particular relates to an industrial boiler flue gas treatment device and method. The flue gas treatment method includes desulphurization and desulphurization treatment methods. Background technique [0002] my country is a big coal-burning country. With the development of the economy, the pollution caused by energy consumption is becoming more and more serious. The NO in the flue gas X , SO 2 Become the main pollutant of the atmosphere. In order to achieve desulfurization and destocking treatment, the latest technology is limestone-gypsum double cycle technology and research related to SNCR+SCR combined destocking technology. The reaction equation is: [0003] 4NH 3 +4NO+O 2 =4N 2 +6H 2 o [0004] 8NH 3 +6NO 2 =7N 2 +12H 2 O or 4NH 3 +2NO 2 +O 2 =3N 2 +6H 2 o [0005] 2CaO+2SO 2 +O 2 = 2CaSO 4 [0006] If ...

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): B01D50/00B01D53/80B01D53/50B01D53/56B01D53/75B01D53/86
CPCB01D50/00B01D53/50B01D53/56B01D53/75B01D53/80B01D53/8628B01D53/8631B01D2251/404B01D2251/606B01D2258/0283
Inventor 汪建平冯义沈良郭付俊徐文梅朱芬娟
Owner 浙江嘉化能源化工股份有限公司