System and method for extracting sulfur from sulfur-containing foam of coking plant

A coking plant and foam technology, which is applied in the field of sulfur extraction from sulfur-containing foam in coking plants, can solve problems such as low sulfur content in sulfur residue, serious environmental pollution, and failure to meet sulfur quality requirements

Active Publication Date: 2020-07-03
LINHUAN COKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the invention is: the environment is seriously polluted during the desulfurization process of the HPF method, and the sulfur content of the obtained sulfur residue is low, which cannot meet the quality requirements of the national standard for sulfur

Method used

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  • System and method for extracting sulfur from sulfur-containing foam of coking plant
  • System and method for extracting sulfur from sulfur-containing foam of coking plant
  • System and method for extracting sulfur from sulfur-containing foam of coking plant

Examples

Experimental program
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Embodiment 1

[0123] Example 1 A system for extracting sulfur from sulfur-containing foam in a coking plant

Embodiment 11

[0125] The system for extracting sulfur from the sulfur-containing foam in the coking plant described in this embodiment is as follows: figure 1 shown, including:

[0126] (1) Extraction unit

[0127] The extraction unit is an extraction tower, and the extraction tower includes two inlets and two outlets, and the outlets include an extraction phase outlet and a raffinate phase outlet. Inlets include sulfur foam feed ports and extractant feed ports. The extraction tower also includes a stirring paddle with blades driven by a geared motor.

[0128] In this embodiment, specifically, the structure of the extraction tower is as follows figure 2 As shown, the extraction tower is a liquid-liquid continuous extraction tower, including a tower body and a motor 104, and the tower body includes an upper clarification section 11, a mixing section 12 and a lower clarification section 13 from top to bottom, and the mixing section 12 is Cylinder structure, the inner wall of the mixing sec...

Embodiment 12

[0141] The system for extracting sulfur from the sulfur-containing foam in the coking plant described in this example is similar to Example 1.1, wherein, in this example, the process diagram of the extraction tower used is as follows Figure 4 shown. The interior of the tower includes an upper clarification section 301 , a mixing section 302 and a lower clarification section 303 from top to bottom. The upper and lower ends of the mixing section are respectively equipped with an upper flange and a lower flange. The upper clarification section is formed between the upper flange and the top of the tower, which is used to clarify the light liquid. The lower clarification section is formed between the lower flange and the bottom of the tower. To clarify heavy liquid. The inner wall of the mixing section 302 is provided with a fixed ring with a central opening. The fixed ring divides the mixing section of the tower body into a series of extraction chambers. A rotating disk is insta...

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Abstract

The invention relates to a system and method for extracting sulfur from sulfur-containing foam of a coking plant. The system comprises an extraction unit, a separation unit and a post-treatment unit,the extraction unit comprises an extraction tower, the extraction tower comprises a tower body and a motor, the tower body sequentially comprises an upper clarification section, a mixing section and alower clarification section from top to bottom, the upper clarification section is provided with a raffinate phase discharge port, the lower clarification section is provided with an extraction phasedischarge port, the top and the bottom of the mixing section are respectively provided with an extraction agent feed port and a sulfur-containing foam feed port, the separation unit comprises a heatpreservation filtering device, the feeding port is connected with an extraction phase discharging hole, the post-treatment unit comprises an evaporation crystallizer, a kettle body of the evaporationcrystallizer is provided with a material inlet, a vapor phase discharge port and a material outlet, the material inlet is connected with a filtrate discharge port of the heat preservation filtering device, the vapor phase discharge port is communicated with the extraction agent feed port of the extraction tower, and sulfur is obtained at the material outlet. Useful components such as sulfur and anammonium salt are directly separated from the sulfur-containing foam, so that the method is economic and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of coking plant waste treatment, in particular to a system and method for extracting sulfur from sulfur-containing foam in a coking plant. Background technique [0002] Sulfur is a valuable industrial raw material used in the manufacture of dyes, pesticides, matches, gunpowder, rubber, rayon, sulfuric acid, and more. At present, domestic coking plants widely adopt HPF desulfurization technology. Because of the large processing capacity and low sulfur content of the treated gas, it can remove harmful substances such as hydrogen cyanide while removing hydrogen sulfide in the gas. The sulfur obtained by the HPF method contains coal tar, residual carbon, desulfurization liquid, ammonium salt and other impurities, and the dry content of sulfur is only 75-80%, which is far lower than the national standard requirement, and the color is black, with little commercial value. Sulfur-containing foam is a liquid-solid m...

Claims

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Application Information

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IPC IPC(8): C01B17/033C01B17/64C01B32/05C01C3/20B01D36/00
CPCB01D36/003C01B17/033C01B17/64C01C3/20C01B32/05
Inventor 陈惜明薛建平陈宇旋李璇邓梦洁计双涛邓枚鲜
Owner LINHUAN COKING
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