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High-speed jet purification method and device for blast furnace gas ammonium chloride

A high-speed jet, blast furnace gas technology, applied in the field of high-speed jet purification, blast furnace gas ammonium chloride high-speed jet purification, can solve the problems of loss, pipeline corrosion, gas burner blockage, etc., to reduce industrial water consumption, turbulence High degree, efficient reunion purification effect

Active Publication Date: 2022-05-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the corrosion caused by impurities such as ammonium chloride in the blast furnace gas to the pipeline during the transportation of the gas, and the crystallization of ammonium chloride will easily cause the gas burner to be blocked, which will cause inconvenience and inconvenience to the use of the gas. Economic losses

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  • High-speed jet purification method and device for blast furnace gas ammonium chloride
  • High-speed jet purification method and device for blast furnace gas ammonium chloride
  • High-speed jet purification method and device for blast furnace gas ammonium chloride

Examples

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Embodiment 1

[0048] See attached figure 1 , 2 , 3, 4, blast furnace gas ammonium chloride high-speed jet flow purification method of the present invention, comprises the following steps:

[0049] Introduce about 0.4MPa high-pressure steam and dilute sulfuric acid solution to the upper part of the first-level high-speed jet reactor (1-1). In the first-level high-speed jet reactor (1-1), first use the gas-liquid two-phase flow nozzle (12- The high-pressure steam in 1, 12-2) atomizes the dilute sulfuric acid solution and sprays dilute sulfuric acid absorption liquid particles with particles between 10-20 μm to the first-stage high-speed jet reactor (1-1), dilute sulfuric acid absorption The liquid and liquid particles absorb and wash the pollutants (ammonium chloride, ammonia) in the blast furnace gas, and at the same time, the high-pressure steam condenses the ammonium chloride particles in the blast furnace gas during the condensation process, making them grow up and dissolve in water. Th...

Embodiment 2

[0058] The difference between embodiment 2 and embodiment 1 is: the dosage of dilute sodium hydroxide is 0.55kg / h per 1000 cubic meters of gas, and the mass fraction is 10%; the dosage of dilute sulfuric acid is 0.35kg per 1000 cubic meters of gas / h, the mass fraction is 10%; the amount of high-pressure steam feeding is 50kg / h per 1000 cubic meters of gas; when the mass concentration of the first dilute sulfuric acid absorption liquid in the primary circulation tank reaches 10% of the initial concentration, the output is open circuit to the filter press for solid-liquid separation; when the mass concentration of the first dilute sodium hydroxide absorption liquid in the secondary circulation tank reaches 10% of the initial concentration, it is output to the filter press for solid-liquid separation in an open circuit.

[0059] In embodiment 2, pass into the blast furnace gas flow rate 8000Nm in the high-speed jet reactor 3 / h, containing ammonia 20mg / Nm 3 , hydrogen chloride ...

Embodiment 3

[0061] The difference between embodiment 3 and embodiment 1 is: the dosage of dilute sodium hydroxide is 0.60kg / h per 1000 cubic meters of gas, and the mass fraction is 10%; the dosage of dilute sulfuric acid is 0.36kg per 1000 cubic meters of gas / h, the mass fraction is 10%; the amount of high-pressure steam feeding is 80kg / h per 1000 cubic meters of gas; the mass concentration of the first dilute sulfuric acid absorption liquid in the primary circulation tank reaches 10% of the initial concentration, and the output is open circuit to the filter press for solid-liquid separation; when the mass concentration of the first dilute sodium hydroxide absorption liquid in the secondary circulation tank reaches 10% of the initial concentration, it is output to the filter press for solid-liquid separation in an open circuit.

[0062] In embodiment 3, pass into the blast furnace gas flow rate 9000Nm in the high-speed jet reactor 3 / h, containing ammonia 25mg / Nm 3 , hydrogen chloride 3...

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Abstract

According to the blast furnace gas ammonium chloride high-speed jet purification method and device, an acid-base two-stage wet purification process is adopted, dilute sulphuric acid and dilute sodium hydroxide are used as absorption liquid to react with ammonia gas and hydrogen chloride in gas, and purification of ammonium chloride, ammonia gas and hydrogen chloride in blast furnace gas is achieved. According to the device, two stages of high-speed jet reactors connected in series are connected with a high-pressure steam and acid-base purification medium circulating system, so that the effects of absorbing, washing and purifying ammonium chloride, ammonia gas and hydrogen chloride in coal gas are achieved; the blast furnace gas is used as a continuous phase, and the absorption liquid and the high-pressure steam are used as dispersed phases, so that the phase interface is enlarged, the gas phase turbulence degree is high, the purification efficiency is effectively improved, the purification process is mature and reliable, the operation cost is low, the process applicability is good, the total purification efficiency of ammonium chloride and hydrogen chloride reaches 95% or above, the water consumption is small, and the problems of chlorate and the like are effectively solved. The equipment is blocked by sulfate enrichment and crystallization. The vertical reactor is small in occupied area and suitable for purifying blast furnace gas.

Description

technical field [0001] The invention discloses a blast furnace gas ammonium chloride high-speed jet purification method and device, in particular to a high-speed jet purification method and device capable of effectively purifying ammonium chloride impurities in blast furnace gas, and belongs to the technical field of blast furnace gas purification in the ironmaking industry. Background technique [0002] Blast furnace gas is a by-product of the ironmaking industry, which contains a certain concentration of ammonium chloride, hydrogen chloride and ammonia. The gas burner is blocked, causing inconvenience and economic loss to the use of gas. In addition, blast furnace gas is also an important secondary energy source for iron and steel plants, and as a gas fuel, the dust content of blast furnace gas should reach 10mg / Nm 3 the following. Considering from the perspective of economy, resource utilization and environmental protection, it is of great significance to the efficient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/10C10K1/12C10K1/00B01J19/26
CPCC10K1/10
Inventor 李立清盛鹏罗俊英曾政
Owner CENT SOUTH UNIV
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