A process and device for preparing sulfur from coking sulfur paste

A technology of coking sulfur and technology, which is applied in the direction of inorganic chemistry, sulfur compounds, chemical instruments and methods, etc., can solve the problems of great harm to the human body and poor sulfur separation effect, achieve complete separation of impurities, reduce heating and melting time, and improve purity Effect

Active Publication Date: 2017-12-26
SHANDONG TAIDONG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the separation effect of the above process on sulfur is not good, and in the process of discharging, a large amount of poisonous gas will be released, which will cause great harm to the human body

Method used

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  • A process and device for preparing sulfur from coking sulfur paste
  • A process and device for preparing sulfur from coking sulfur paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Open the inlet valve of the sulfur melting kettle, transport the coking sulfur paste from the sulfur paste pool to the hopper of the sulfur melting kettle with a driving grab bucket, and flow into the sulfur melting kettle by gravity. When the sulfur paste in the melting sulfur kettle reaches 70-80% of the volume of the sulfur melting kettle, stop feeding, and close the feed valve of the sulfur melting kettle.

[0071] Open the inlet and outlet valves of the jacket and coil of the sulfur melting kettle, turn on the heat transfer oil furnace, and heat the coking sulfur paste in the sulfur melting kettle at 240°C, and the internal pressure of the sulfur melting kettle is 0.55MPa. When the temperature at the top of the sulfur melting kettle reaches 145±5°C, sulfur release begins.

[0072]Place the material receiving box at the lower part of the discharge pipe, open the valve of the tail gas collecting cover, slowly and uniformly put the liquid sulfur into the material rece...

Embodiment 2

[0076] Open the inlet valve of the sulfur melting kettle, transport the sulfur paste from the sulfur paste pool to the hopper of the sulfur melting kettle with a driving grab, and flow into the sulfur melting kettle by gravity. When the sulfur paste in the melting sulfur kettle reaches 70-80% of the volume of the sulfur melting kettle, stop feeding, and close the feed valve of the sulfur melting kettle.

[0077] Open the inlet and outlet valves of the jacket and coil of the sulfur melting kettle, turn on the heat transfer oil furnace, and heat the coking sulfur paste in the sulfur melting kettle at 200°C, and the internal pressure of the sulfur melting kettle is 0.55MPa. When the temperature at the top of the sulfur melting kettle reaches 145±5°C, sulfur release begins.

[0078] Place the material receiving box at the lower part of the discharge pipe, open the valve of the tail gas collecting cover, slowly and uniformly put the liquid sulfur into the material receiving box, co...

Embodiment 3

[0082] Open the inlet valve of the sulfur melting kettle, transport the sulfur paste from the sulfur paste pool to the hopper of the sulfur melting kettle with a driving grab, and flow into the sulfur melting kettle by gravity. When the sulfur paste in the melting sulfur kettle reaches 70-80% of the volume of the sulfur melting kettle, stop feeding, and close the feed valve of the sulfur melting kettle.

[0083] Open the inlet and outlet valves of the jacket and coil of the sulfur melting kettle, turn on the heat transfer oil furnace, and heat the coking sulfur paste in the sulfur melting kettle at 150°C, and the internal pressure of the sulfur melting kettle is 0.55MPa. When the temperature at the top of the sulfur melting kettle reaches 145±5°C, sulfur release begins.

[0084] Place the material receiving box at the lower part of the discharge pipe, open the valve of the tail gas collecting cover, slowly and uniformly put the liquid sulfur into the material receiving box, co...

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Abstract

The invention provides a process for preparing sulphur through coked sulfur paste. The method includes the following steps of A, heating coked sulfur paste through heat conductive oil to obtain sulphur and waste gas; B, sequentially conducting acid absorption, alkali absorption and photolysis on waste gas in the step A to obtain exhaust gas. Coked sulfur paste is heated through heat conductive oil, the temperature difference between a heating medium and an elemental sulfur melting point is increased, the temperature-rise melting time of coked sulfur paste in a sulfur melting kettle is shortened, the layering silent period of liquid coked sulfur paste in the sulfur melting kettle is prolonged, impurities are more thoroughly separated, and the purity of a product is improved; the three-stage processing mode of alkali absorption, acid absorption and photolysis is adopted, and therefore the emission problem of toxic and harmful gas is effectively solved. The invention further provides a device for preparing sulphur through coked sulfur paste.

Description

technical field [0001] The invention belongs to the technical field of metallurgical coking, and in particular relates to a process and a device for preparing sulfur from coking sulfur paste. Background technique [0002] Coking sulfur paste is a by-product produced by the gas desulfurization system of the coking plant. In the HPF desulfurization process, the sulfur foam generated at the top of the regeneration tower needs to be concentrated to recover the desulfurized clear liquid containing ammonia and catalyst, so that the suspended sulfur is concentrated into Coking sulfur paste with a certain water content. Due to the high content of elemental sulfur in coking sulfur paste, it is prone to oxidation reaction due to heating for a long time, causing environmental pollution. The sulfur in coking sulfur paste can be purified to reduce pollution and increase economic benefits. [0003] In the prior art, a sulfur melting kettle is often used to purify the coking sulfur paste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/027
Inventor 周显涛宿庆利张秀丽郑帅强卢宗喜
Owner SHANDONG TAIDONG ENVIRONMENTAL PROTECTION TECH CO LTD
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