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Tubular pressurizing, oxidizing and ammoniating integrated reaction system for flue gas ammonia desulphurization

A technology of ammonia desulfurization and reaction system, which is applied in the field of reactor technology and environmental engineering, which can solve the problems of low utilization rate of oxidizing wind, large excess air coefficient, and inability to accurately add ammonia to regeneration of absorption liquid, so as to achieve targeted and precise Oxidation and ammoniation, efficient oxidation and ammoniation, small volume effect

Pending Publication Date: 2020-06-12
张明
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide a tubular pressurized oxidative ammonification integrated reaction system for flue gas ammonia desulfurization, so that ammonia addition and oxidation can be carried out in the reactor, realizing real pressurized oxidation, and coupled with the use of reaction The residual air pressure of the system realizes the pneumatic agitation of the solution in the incomplete oxidation solution tank and the pneumatic agitation of the concentrate, and solves the problem of low utilization rate of oxidation wind, large excess air coefficient, and inability to accurately regenerate the absorption solution with ammonia in the existing technical route problem, it occupies a small area of ​​the device and has the significance of energy saving

Method used

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  • Tubular pressurizing, oxidizing and ammoniating integrated reaction system for flue gas ammonia desulphurization
  • Tubular pressurizing, oxidizing and ammoniating integrated reaction system for flue gas ammonia desulphurization
  • Tubular pressurizing, oxidizing and ammoniating integrated reaction system for flue gas ammonia desulphurization

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Embodiment 1

[0040] The boiler design capacity of a chemical enterprise is 2×220t / h. The company built a flue gas ammonia desulfurization device, which adopted two furnaces and one tower, and crystallization process in the tower. The full-load flue gas volume of a single tower is about 25×10 4 Nm3 / h, the sulfur content of the design coal is 0.5%, and the maximum sulfur dioxide content of the flue gas inlet is 1100mg / Nm 3 , the designed outlet sulfur dioxide is required to be less than 35mg, and the nitrogen oxides can be less than 50mg. oxidization and oxidation.

[0041] The overall design of the tubular pressurized oxidative ammonification integrated reaction system for flue gas ammonia desulfurization described in this embodiment is specifically (see Figure 1-Figure 4 ): including a desulfurization tower, an incomplete oxidation solution tank 100, an oxidation-ammonation reaction system and a gas-liquid separation system, the desulfurization tower is connected to the incomplete oxidat...

Embodiment 2

[0076] The boiler design capacity of a chemical enterprise is 4×160t / h. The company has built a flue gas ammonia desulfurization device, which adopts four furnaces and one tower, subsaturated absorption, and adopts a double tower process. External steam evaporation and crystallization process, the single tower full load flue gas volume is about 21×10 4 Nm3 / h, the sulfur content of the designed coal is 0.55%. This process adopts side stirring + oxidation spray gun for oxidation. The actual oxidation rate cannot reach the design value of 98.5% or more, and the actual oxidation rate is between 85-93%. The subsequent evaporation and crystallization materials are decomposed Serious, resulting in low product yield, decomposition of ammonia and sulfur dioxide caused environmental pollution on the site.

[0077] The original incomplete oxidation solution sent to the evaporative crystallization device is oxidized and upgraded according to the Figure 5 As shown, the new tubular pressu...

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Abstract

The invention belongs to the technical field of reactors and environmental engineering in chemical engineering, and relates to a tubular pressurizing, oxidizing and ammoniating integrated reaction system for flue gas ammonia desulphurization. The system comprises a desulfurization tower, an incomplete oxidation solution tank, an oxidation-ammoniation reaction system and a gas-liquid separation system, the desulfurization tower is connected with the incomplete oxidation solution tank, the incomplete oxidation solution tank is connected with the oxidation-ammoniation reaction system, the oxidation-ammoniation reaction system is connected with the gas-liquid separation system, and the gas-liquid separation system is connected with the desulfurization tower. A tubular reactor technology is adopted to carry out pressurized oxidation and ammoniation on a desulfurization solution, precise oxidation and ammoniation are realized, the reactor is small in size, sensitive to control, capable of achieving rapid oxidation and controllable oxidation rate of a desulfurization solution and low in oxygen-sulfur ratio, oxidation of a high-concentration desulfurization solution can be achieved due tohigh oxidation pressure and high oxidation efficiency, meanwhile, pneumatic stirring and disturbance are conducted on the desulfurization system solution through gas-phase residual pressure of the gas-liquid separation system, and comprehensive utilization is achieved.

Description

technical field [0001] The invention belongs to the field of reactor technology and environmental engineering technology in chemical engineering, and relates to a tubular pressurized oxidative ammoniation integrated reaction system for flue gas ammonia desulfurization. Background technique [0002] SO generated from coal-fired boilers and various exhaust gas and tail gas incineration 2 Emissions are the main source of air pollution and the main pollutant that causes air pollution. China has become a big coal-producing country, so sulfur dioxide emissions have increased rapidly. For this reason, domestic flue gas treatment technologies have been upgraded one after another, aiming to achieve the new ultra-low emission standards promulgated by the state, that is, before 2020, coal-fired units will be released. Comprehensively implement ultra-low emission and energy-saving renovations to greatly reduce coal consumption and pollution emissions for power generation. It is clearl...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50C01C1/24C01C1/242
CPCB01D53/78B01D53/501C01C1/24C01C1/242B01D2251/2062B01D2258/0283
Inventor 宿树权杨建超张明
Owner 张明
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