Semi-coke wastewater treatment method

A technology of blue carbon wastewater and treatment method, which is applied in the directions of multi-stage water treatment, water/sewage treatment, natural water treatment, etc.

Active Publication Date: 2018-03-23
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defect that the semi-coke wastewater treatment process in the prior art can only reach the wastewater discharge standard and c

Method used

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  • Semi-coke wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] figure 1It is a process flow diagram of a specific example of the blue charcoal wastewater treatment method in Embodiment 1 of the present invention. The raw material lump coal enters the carbonization chamber from the upper part of the vertical carbonization furnace 9 at a speed of 16 t / h, and the temperature in the preheating section of the vertical carbonization furnace 9 is 350 ℃, the carbonization temperature is 750℃, the temperature in the upper part of the cooling section is 180℃, and the temperature in the lower part of the cooling section is 70℃. The factory carries out screening, obtains semi-coke product after screening, and the semi-coke waste water produced by vertical carbonization furnace 9 passes through steel concrete structure grease trap 10, obtains oil slick in the upper part, obtains heavy oil in the lower part, removes the sewage of heavy oil and oil slick from The middle part of the steel concrete structure grease trap 10 enters the entrance of th...

Embodiment 2

[0032] The semi-coke waste water treatment process that vertical carbonization furnace 9 produces is the same as embodiment 1, and the difference is that the process parameters of deacidification tower 1, deamination tower 2, and phenol oil extraction tower 3 are different, and the plate number of deacidification tower 1 in the present embodiment is 30. The operating pressure at the top of the tower is 0.4Mpa, the operating pressure at the bottom of the tower is 0.42Mpa, the temperature at the top of the tower is 43°C, the temperature at the bottom of the tower is 136°C, the reflux ratio is 4, and the number of plates of the deamination tower 2 is 40. The operating pressure is 0.5Mpa, the operating pressure at the bottom of the tower is 0.53Mpa, the temperature at the top of the tower is 142°C, the temperature at the bottom of the tower is 154°C, the reflux ratio is 6, the number of plates of the phenol oil extraction tower 3 is 75, and the operating pressure at the top of the t...

Embodiment 3

[0034] The semi-coke waste water treatment process that vertical carbonization furnace 9 produces is the same as embodiment 1, and the difference is that the process parameters of deacidification tower 1, deamination tower 2, and phenol oil extraction tower 3 are different, and the plate number of deacidification tower 1 in the present embodiment is 35, the operating pressure is 0.45Mpa, the temperature at the top of the tower is 45°C, and the temperature at the bottom of the tower is 135°C. The reflux ratio is 5; 0.58Mpa, the temperature at the top of the tower is 140°C, the temperature at the bottom of the tower is 148°C, and the reflux ratio is 4; the number of plates in the phenol oil extraction tower 3 is 80, the operating pressure at the top of the tower is 200Kpa, and the operating pressure at the bottom of the tower is 210Kpa. The temperature is 55°C, the bottom temperature is 60°C, and the solvent ratio is 8:1.

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Abstract

The invention relates to the field of semi-coke wastewater treatment, in particular to a semi-coke wastewater treatment method. The method comprises a pretreatment phase and a biochemical treatment phase, wherein the pretreatment phase comprises the following steps of enabling semi-coke wastewater to be successively subjected to oil removing treatment, acid stripping treatment, deamination treatment and dephenolization treatment to obtain pretreated wastewater, wherein the acid stripping treatment is performed in an acid stripping tower, the deamination treatment is performed in a deaminationtower, and the dephenolization treatment is performed in a carbolic oil extraction tower; the biochemical treatment phase comprises the following steps of enabling the pretreated wastewater to successively pass through a hydrolysis acidification pool, a biochemical reaction pool, a settling pool, a coagulative precipitation pool and a film treatment device to obtain dialysis water and concentratedwater, wherein the dialysis water enters a cooling segment of a vertical carbonization furnace, and the concentrated water enters a preheating segment of the vertical carbonization furnace. The acidstripping tower, the deamination tower and the carbolic oil extraction tower jointly cooperate with another process in a specific process condition, so that the semi-coke wastewater can be recycled for quenching coke, the quality of an obtained semi-coke product meets a standard, the cycle use of the semi-coke wastewater is realized, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a semi-coke wastewater treatment method. Background technique [0002] Semi-coke, also known as semi-coke, as a new type of carbon material, has gradually replaced metallurgical coke due to its characteristics of fixed carbon, high specific resistivity and chemical activity, and low content of impurities such as ash, sulfur, phosphorus, and moisture. Production of calcium carbide, ferroalloy, ferrosilicon and other products. Semi-coke is mainly made of non-stick coal as a raw material. It is a solid substance with high fixed carbon content in the production of medium and low temperature carbonization process. Wastewater will be generated during the production of semi-coke and gas purification, which is called semi-coke wastewater. Carbon production adopts medium and low temperature dry distillation process, and the temperature is relatively low, so semi-coke product...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/34
CPCC02F1/04C02F1/26C02F1/40C02F1/441C02F1/52C02F3/28C02F9/00C02F2001/007C02F2103/34C02F2301/08
Inventor 不公告发明人
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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