In-furnace deep denitration process, denitration agent and preparation method of denitration agent

A denitration agent and denitration technology, applied in the field of denitrification, can solve the problems of short service life, failure to meet environmental protection requirements, high operation and maintenance costs, and achieve the effect of improving production efficiency

Pending Publication Date: 2020-09-18
常州和艺翔环境工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing flue gas denitrification treatment system in China, such as the ammonia water denitrification process, requires that the nitrogen oxides (NOx) in the denitrification furnace X ) concentration is less than 100 mg / standard square, resulting in low ammonia denitrification efficiency and heavy pollution, which cannot meet environmental protection requirements
Another example is the Selective Catalytic Reduction (SCR) technology. Although the denitrification efficiency is high, the process is complex, the equipment is expensive, the equipment operation and maintenance costs are high, and the service life is short. It is difficult to be widely used in the denitrification industry, especially in the domestic environmental protection industry. The use of thermal power plants has great limitations

Method used

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  • In-furnace deep denitration process, denitration agent and preparation method of denitration agent
  • In-furnace deep denitration process, denitration agent and preparation method of denitration agent

Examples

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preparation example Construction

[0036] Further, the present invention provides a method for preparing a denitrification agent, comprising: mixing urea, double crystal ammonia, talc powder, polyacrylic acid, and kaolin in water; heating the mixed solution to 120°C and stirring rapidly; mixing the raw materials Finally, a polymerization reaction occurs, so that the amino component in the twin crystal ammonia is polymerized on the polymer material in the raw material; after drying at a high temperature, it is dried; the dried powder is added to the reactor, the temperature is raised to 180 ° C, and the pressure is increased to two Atmospheric pressure, after fully reacting for 80 minutes until the finished product comes out of the pan.

[0037] Part II: List some examples

Embodiment 1

[0039] The denitrification agent is delivered to the powder through the powder conveying reaction system (including the denitrification agent silo, equipped with weighing devices, heat tracing devices, rapping devices, arch breaking devices, high and low material level alarms, buffer hoppers, agitators, etc.) The body is automatically cleaned in the spray gun, and then the powder denitrification agent is sprayed from the spray gun into the 600 °C furnace (that is, in the denitrification environment) to perform deep denitrification. The denitration agent is prepared from the following raw materials in parts by mass: 7 parts of urea; 2 parts of twin crystal ammonia; 2 parts of talcum powder; 3 parts of polyacrylic acid; and 1 part of kaolin.

Embodiment 2

[0041] The denitrification agent is delivered to the powder automatic cleaning spray gun through the powder delivery reaction system, and then the powder denitrification agent is sprayed from the spray gun into the 650°C furnace (that is, in the denitrification environment) to perform deep denitrification. The denitration agent is prepared from the following raw materials in parts by mass: 6 parts of urea; 1 part of twin crystal ammonia; 2 parts of talcum powder; 2 parts of polyacrylic acid; 1 part of kaolin.

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Abstract

The invention belongs to the technical field of denitration, and particularly relates to an in-furnace deep denitration process, a denitration agent and a preparation method of the denitration agent.The in-furnace deep denitration process comprises the following steps that a denitration agent is added into a heated hearth, so that the denitration agent is subjected to high-temperature cracking reaction to generate a gaseous denitration reducing agent; and the gaseous denitration reducing agent and nitrogen oxide in the hearth are subjected to in-situ reduction reaction so as to carry out deepdenitration. By utilizing the good diffusivity of the gaseous denitration reducing agent in a denitrification environment, the gaseous denitration reducing agent can be fully and efficiently mixed with gaseous nitric oxide, so that an in-situ reduction reaction is facilitated, and the effect of deep denitrification is achieved; and meanwhile, the concentration of nitric oxide in the hearth does not need to be limited, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of denitrification, and in particular relates to an in-furnace deep denitrification process, a denitrification agent and a preparation method of the denitrification agent. Background technique [0002] With the country's increasingly stringent requirements for environmental protection, there are higher and higher new standards for industrial flue gas, especially for the emission of nitrogen oxides. In the process of incineration, solid substances are burned into gaseous substances or other forms, which may cause greater harm to the environment. NO produced during waste incineration x Nitric oxide (NO) and nitrogen dioxide (NO 2 ), where NO is generated at higher temperatures, and NO 2 It is relatively stable at low temperature, and NO can combine with O in the air 2 or O 3 reaction to produce NO 2 . In the incinerator, the temperature and the chemical composition of the burning waste are the main fact...

Claims

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Application Information

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IPC IPC(8): B01D53/56B01D53/76
CPCB01D53/56B01D53/76B01D2258/0283
Inventor 裔中平
Owner 常州和艺翔环境工程有限公司
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