Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Aminogroup smoke exhaust purification method and device thereof

A technology for ammonia and purification towers, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve problems such as easy to occur, unsolved ammonia escape loss, large ammonia escape loss, etc., to achieve effective oxidation, operation and operation Controlling safe and reliable, crystallized quality results

Inactive Publication Date: 2010-05-12
王建敏
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1178735C discloses a combined ammonia method purification tower, including an oxidation section, a concentration section, an absorption section, a water washing section and a defogging section. That is, equivalent to 0.2-0.5 liters of liquid / Nm 3 Flue gas, too low, resulting in a large loss of ammonia escape
CN2790569Y and CN1648049A propose a combined purification tower with an ammonia recovery section, trying to solve the problem of ammonia escape loss, and the gas-liquid ratio of the absorption section is 200-2000, which is equivalent to 0.5-5 liters of liquid / Nm 3 Flue gas, in fact, does not solve the problem of ammonia escape loss
The existing ammonia-based smoke exhaust purification technology has almost no method for this type of aerosol. Even for weakly acidic aerosols, most ammonia-based purification technologies are easy to appear in practical applications and difficult to solve

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
  • Aminogroup smoke exhaust purification method and device thereof
  • Aminogroup smoke exhaust purification method and device thereof
  • Aminogroup smoke exhaust purification method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The amino smoke exhaust purification device and method of the present invention are applied to a smoke exhaust purification process, and the treated flue gas volume is 100,000 Nm 3 / h, the sulfur dioxide content in the flue gas is 3000mg / Nm 3 , the content of sulfur trioxide is 50mg / Nm 3 , the hydrogen chloride content is 25mg / Nm 3 , NO 2 The content is 50mg / Nm 3 , NO content is 320mg / Nm 3 , the dust content is 80mg / Nm 3 , the flue gas temperature is 135°C.

[0054] Use as attached figure 1 As shown in the amino smoke exhaust purification device of the present invention, the washing tower 5 is a vertically installed spray tower with a diameter of 3.6m, and the purification tower 15 is an inverse sulfur tower with a diameter of 3.6m. The described smoke exhaust purification method is implemented according to the following steps:

[0055] 1) The original flue gas 10 enters the washing tower 5 to cool down to 55°C, removes dust, and absorbs strong acid gases such a...

Embodiment 2

[0070] Other conditions of the flue gas are the same as in Example 1, except that the content of sulfur dioxide in the flue gas is higher, reaching 12000mg / Nm 3 , the content of sulfur trioxide reaches 150mg / Nm 3 , using the attached figure 2 The shown amino smoke exhaust purification device of the present invention, that is, the washing tower 5 is a vertically installed spray tower, and the purification tower 15 is a downstream tower, and the diameter of the two towers is 3.6m. Implementation steps are also the same as in Example 1.

[0071] In addition, the raw material ammonia 2 enters the oxidation tank at the lower part of the purification tower 15 with a flow rate of 628.5kg / h, and the oxidation air 13 also enters the oxidation tank with a flow rate of 50Nm 3 / min, the process water 1 also enters the oxidation tank with a flow rate of 4.5m 3 / h, obtain described dilute ammonium sulfate aqueous solution 151 and store in the oxidation pond of described purification tow...

Embodiment 3

[0078] Other conditions of flue gas are identical with embodiment 1, have adopted as attached image 3 The shown amino smoke exhaust purification device of the present invention, that is, the washing tower 5 is a horizontally installed spray tower, and the purification tower 15 is a countercurrent tower with a diameter of 3.6m and a height of 35m. Moreover, the special feature of this embodiment is that the flue gas outlet on the top of the purification tower is directly connected with a straight chimney, and the height of the straight chimney is 60m. Implementation steps are the same as in Example 1.

[0079] In the present embodiment, the purification efficiency reaches 96.5%, and the ammonia escape amount in the purification exhaust gas 30 is 3.5mg / Nm 3 , the sulfur dioxide content is 98mg / Nm 3 , there is no obvious aerosol phenomenon, and the smoke plume basically disappears when the length of the smoke plume is about 100m. The effect is very obvious.

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

An aminogroup smoke exhaust purification method and a device thereof relate to a method and a device for eliminating aerosol and ammonia escape, wherein a purification device comprises a washing tower, a purifying tower, a washing circulation tank and a crystal growth tank. Exhaust smoke enters the washing tower for temperature reduction and strong acidic gas absorption firstly, and then enters a subsequent purifying tower for weak acidic gas absorption. The method and the device have the following characteristics: dilute aqueous solution of ammonium sulfate with concentration of 5-40% and pH of 5.3-6.3 is used in the purifying tower; dilute slurry containing ammonium sulfate crystalline solid is used in the washing tower, wherein ammonium sulfate solid content is less than 10% and pH thereof is 1.0- 4.5; in addition, the ratio of the flow rate of sulfur to the flow rate of circulating fluid in the purifying tower is 50-500 (g / h) / (m3 / h), and the ratio of the flow rate of the circulating fluid in the washing tower to the flow rate of the exhaust smoke is 1.0-10.0 (l / h) / (Nm3 / h). Therefore, two processes deciding aerosol formation and ammonia escape are effectively decoupled and controlled, and the operation and control of the whole purification system are safer and more reliable.

Description

technical field [0001] The invention relates to a method and device for purifying ammonia exhaust smoke, in particular to a purification method and device for producing ammonium sulfate fertilizer by recovering sulfur oxide from flue gas with ammonia as a raw material, which belongs to the technical fields of electric power, metallurgy, environmental protection and chemical industry, and is especially suitable for Smoke exhaust purification field. Background technique [0002] Acidic gaseous harmful substances contained in flue gas, especially SO 2 is the main source of acid rain. As we all know, one way to solve acid rain pollution is smoke exhaust purification. Existing smoke exhaust purification methods mainly use limestone as raw material for calcium-based purification, and its purification product is calcium sulfate (or purified gypsum), which can be used as building materials, including gypsum board and cement additives, but due to China's gypsum resources It is rel...

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
IPC IPC(8): B01D53/78B01D53/50
Inventor 王建敏
Owner 王建敏
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com