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A method for high-concentration salt and high-cod sewage treatment and co-production of synthesis gas

A high-concentration salt and sewage treatment technology, used in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as difficult biochemical treatment of high COD sewage treatment, and reduce secondary pollution. , the effect of reducing investment costs and improving utilization value

Active Publication Date: 2019-03-29
HUBEI SANNING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for the co-production of synthetic gas in high-concentration salt and high-COD sewage treatment to solve the existing high-salt, high-COD sewage treatment problems that are difficult to biochemically treat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The sewage containing high concentration of salt and high COD is concentrated by evaporator to a solution with a total solid content of 50%; then mixed with oxygen at the burner and atomized, it enters the pressurized coal gasifier, at 6.5MPa, 1300℃ Under working conditions, cracking, conversion, and oxidation reactions are carried out to generate water gas, and high-concentration salt, high-COD substances and raw coal are converted into H 2 , CO, CO 2 , N 2 After waiting for water gas, the water gas is washed and dedusted to obtain clean synthesis gas, which can be used to produce chemical products such as methanol, synthetic ammonia, and ethylene glycol.

[0022] Treat 1,500 tons of high-concentration salt and high-COD sewage with a total solid content of 50%. The calorific value of its solids is 15000KJ / Kg (solids refer to the remaining substances after all the water is evaporated to dryness, and the solid content of 1500 tons of waste liquid with a solid content o...

Embodiment 2

[0023] Example 2: The sewage containing high concentration of salt and high COD is concentrated to a solution with a total solid content of 30% using a concentration device; then it is mixed with oxygen at the burner and atomized and then enters the pressurized coal gasifier, at 4.0MPa , under the working condition of 1280°C, cracking, conversion, and oxidation reactions are carried out to generate water gas, and high-concentration salt, high-COD substances and raw coal are converted into H 2 , CO, N 2 , CO 2 After waiting for water gas, the water gas is washed and dedusted to obtain clean synthesis gas, which can be used to produce chemical products such as methanol, synthetic ammonia, and ethylene glycol.

[0024] Treat 1,500 tons of high-concentration salt and high-COD sewage with a total solid content of 30%. The calorific value of its solids is 15000KJ / Kg (solids refer to the remaining substances after all the water is evaporated to dryness, and the solid content of 150...

Embodiment 3

[0025] Example 3: The sewage containing high concentration of salt and high COD is concentrated to a solution with a total solid content of 30% using a concentration device; then it is mixed with oxygen at the burner and atomized and then enters the pressurized coal gasifier, at 2.0MPa , under the working condition of 1500°C, cracking, conversion, and oxidation reactions are carried out to generate water gas, and high-concentration salt, high-COD substances and raw coal are converted into H 2 , CO, N 2 , CO 2 After waiting for water gas, the water gas is washed and dedusted to obtain clean synthesis gas, which can be used to produce chemical products such as methanol, synthetic ammonia, and ethylene glycol.

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Abstract

The invention discloses a method for co-producing synthesis gas through treatment of high-concentration salt and high-COD sewage. High-concentration salt and high-COD sewage are concentrated, the mass fraction of the total solid content of the high-concentration salt and the high-COD sewage ranges from 10% to 60%, and then the concentrated materials and oxygen are mixed and atomized on a nozzle; then the mixture enters a pressurizing coal gasifier, splitting, converting and oxidizing reactions are carried out under the working condition of 2 Mpa to 8 Mpa and 1,250 DEG C to 1,500 DEG C, and water gas is generated; finally, the water gas is washed and dedusted, and the clean synthesis gas is obtained. The synthesis gas can be used for producing synthesis ammonia, methyl alcohol, ethanediol and other chemical products, and the utilization value of the sewage is improved. Harmful waste hard to treat is converted into raw materials for producing chemical products, remarkable social and economic benefits are achieved, and the method conforms to the development concept of circular economy.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating high-concentration salt and high-COD sewage and co-producing synthesis gas. Background technique [0002] With the rapid development and growth of chemical, pharmaceutical, dyestuff, pesticide and other industries, the resulting high-concentration salt and high-COD sewage have become important factors affecting the environment, such as high-concentration sodium organic acids such as benzene in the production of caprolactam Salt wastewater, ammonium sulfate wastewater from hydroquinone production, wastewater containing naphthalene derivatives from naphthol production, and anthraquinone wastewater from dye factories are major problems in the sewage treatment of various chemical industry parks. Ammonia nitrogen wastewater causes the fertilization of natural water bodies, causing algae and other aquatic organisms to grow and reproduce in large numbers to form alg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C10J3/46C10K1/02
CPCC02F1/00C10J3/46C10J2300/0946C10K1/02
Inventor 游川北李发春程双
Owner HUBEI SANNING CHEM
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