WO2014032384A1

WO2014032384A1 - Sulfur slurry or sulfur paste conversion device and conversion process

Info

Publication number: WO2014032384A1
Application number: PCT/CN2013/000265
Authority: WO
Inventors: 徐昭平
Original assignee: Xu Zhaoping
Priority date: 2012-08-27
Filing date: 2013-03-12
Publication date: 2014-03-06
Also published as: AU2013101693A6; AU2013308021A1; CN102815673B; AU2013101693A4; CN102815673A

Abstract

Provided are a sulfur slurry or sulfur paste conversion device and a conversion process. The sulfur slurry or sulfur paste conversion device comprises a shell and a base support which is welded at the lower part of the shell. A furnace gas outlet is arranged at the top of the shell. A feed inlet is arranged at the upper part of a feed inlet end of the shell. A feeder is installed at the feed inlet. A furnace slag outlet is arranged at the lower part of a slag outlet end of the shell. A water seal device is installed at the furnace slag outlet. The sulfur slurry or sulfur paste conversion process comprises the following steps of: (1), firstly drying sulfur slurry or sulfur paste till the water content of the sulfur slurry or the sulfur paste is less than 8 percent; (2), feeding the dried sulfur slurry or the dried sulfur paste into the feed inlet of the conversion device through the feeder, the sulfur slurry or the sulfur paste being distributed on a fixed fire grate segment and/or a movable fire grate segment; and (3), using open fire to ignite sawdust to gradually increase the internal temperature of the shell till the sulfur slurry or the sulfur paste is ignited. The treatment process belongs to the technical field of desulphurization by-product treatment, and is simple and feasible, the production cost is low and the sulfur slurry or the sulfur paste can be fully utilized to the utmost extent.

Description

Sulfur mud, sulfur paste conversion device and conversion process

The invention belongs to the technical field of desulfurization by-product treatment, and particularly relates to a sulfur mud, a sulfur paste conversion device and a conversion process.

Background technique

Sulfur exists in coal in three forms, namely organic sulfur, pyrite sulfur (sulfur in the form of pyrite and pyrite) and sulfate sulfur. Although sulfur can burn heat, it is an extremely harmful ingredient. After sulfur combustion, sulfur dioxide (S02) and a small amount of sulfur trioxide (S03) are produced, which can be polluted by the atmosphere. It is the main substance that forms acid rain and is harmful to human bodies, animals and plants, and ground buildings. In order to reduce the above hazards, large coal producers such as coking plants and fertilizer plants must desulfurize coal before using coal.

At present, many coking plants in China use a desulfurization process using ammonia as an alkali source. The process belongs to wet desulfurization. The desulfurization rich liquid after the hydrogen sulfide is absorbed in the desulfurization section produces sulfur foam during the regeneration process. The sulfur foam is foamy. A solid-liquid mixture. Many coking enterprises are desiccated by centrifugal drying, and finally get a certain amount of sulfur or sulfur paste. The solids in the slime or sulfur paste are mainly sulfur particles and also contain a small amount of colored oily organic impurities. Sulfur is an important chemical raw material, but it is difficult to purify and process because the sulfur contained in the slime or sulfur paste is not high in purity. Therefore, the value of sulphur and sulphur paste is not high and is mainly treated as solid waste. The general treatment method is stacking landfill or take-out. The accumulation of these sulfur mud and sulphur paste will cause environmental pollution and waste of resources. The take-away will have low economic benefits, and the purchaser will refine the waste sulfur by heating and consume coal. High volume, resulting in waste of resources.

In the prior art, there are also processes for recycling and utilizing sulfur mud and sulfur paste: (1) a distillation process using steam or flue gas as a heat source, the process is neglected by colored organic impurities in the solid, and the obtained sulfur is not high in purity. (2) The extraction process is used to recover and purify the sulfur in the sulfur mud and sulfur paste. The process steps are complicated, the production cost is high, and the yield of the obtained sulfur is low; (3) the molten sulfur melting sulfur process, The process is to add sulfur sludge and sulfur paste to the molten sulfur kettle, and melt all the sulfur in the sulfur mud and the sulfur paste into a liquid. The energy consumption of the process in the sulfur melting process is too large, and the production cost is greatly increased.

[0005] The harmless treatment of sulfur mud and sulfur paste is an important part of the desulfurization recovery section. It can be seen from the above description that sulfuric acid, sulfur paste and other by-products produced after desulfurization from coal combustion have low purity, poor quality and difficult sales. In addition to the low-purity sulfur, there are no other better methods. It is used.

Summary of the invention

It is an object of the present invention to provide a slime, sulfur paste conversion apparatus and conversion process for the above-mentioned drawbacks. The treatment process is simple and easy, the production cost is low, and the sulfur mud and sulfur paste can be fully utilized to the utmost extent. The technical scheme of the present invention is: a sulfur mud and sulfur paste conversion device, comprising: a casing and a base bracket welded to a lower portion of the casing, wherein a furnace gas outlet is arranged on a top surface of the casing; and a feeding portion is provided at an upper portion of the feeding end of the casing a feeding device is installed at the inlet; a slag outlet is arranged at the lower part of the slag outlet of the casing, and a water sealing device is installed at the slag outlet; the bottom surface of the casing is a sloped surface, and the fixed furnace is arranged step by step on the bottom surface of the casing. In the row, a wind chamber is arranged below the fixed grate piece, and the air chamber is provided with an inlet valve: a movable grate piece is arranged between two adjacent fixed grate pieces of the fixed grate piece, and the movable grate piece is fixed on the movable frame The movable frame is located directly below the bottom surface of the casing; the bottom of the movable frame is mounted with a plurality of supporting frames, and the bottom end of the supporting frame is connected to the sliding rail fixed on the base bracket by a pulley; the supporting frame is connected Transmission device: A waste heat recovery device is disposed inside the casing.

The transmission device includes a connecting rod and a driving device, and the supporting frame is connected to the driving device through a connecting rod.

The drive device is a motor or a hydraulic cylinder or a cylinder or a cylinder.

The housing has a heat insulating material.

A sulfur mud and sulfur paste conversion process includes the following steps:

(1) First, the sulfur mud and sulfur paste are dried to a water content of less than 8%;

(2) The dried sulfur slurry and sulfur paste are sent to the feed port of the conversion device through the feeder, and the sulfur mud and the sulfur paste are distributed on the fixed grate piece and/or the movable grate piece;

(3) The sawdust is ignited and ignited, so that the shell gradually heats up to the sulfur mud and the sulfur paste is ignited; the air chamber controls the air intake amount, so that the sulfur mud and the sulfur paste are fully burned, the sulfur mud and the sulfur paste are converted into sulfur dioxide gas and slag. The generated sulfur dioxide gas enters the sulfur dioxide recovery device connected to the casing from the furnace gas outlet on the top surface of the casing, and recovers the sulfur dioxide; the slag moves along the bottom surface of the casing to the slag outlet of the casing step by step, and the slag is discharged from the slag outlet The water sealing device located at the outlet of the slag is recovered, and the slag is recovered after the water sealing; the waste heat generated by the combustion of the sulfur mud and the sulfur paste is used for recycling by the waste heat recovery device.

The beneficial effects of the invention are as follows: The conversion device according to the invention is used for the treatment of slime and sulphur paste, and the device is designed as a slope on the bottom surface of the casing to facilitate the discharge of slag. In addition, a fixed grate piece and a movable grate piece are arranged, and the fixed grate pieces located in the casing are directly arranged and fixed on the bottom surface of the casing in a stepwise manner, and are integrated with the bottom surface of the casing, which can not only fully utilize the inclined surface of the bottom surface of the casing, but also the structure. Simple, no need to use complicated fixed parts, saving cost: The active grate pieces are arranged between two adjacent fixed grate sheets, and the movable grate pieces entering the housing through the bottom surface of the housing can reciprocate between the fixed grate pieces It can not only help the sulfur mud and sulfur paste to repeatedly and fully burn inside the casing, but also push the fully burned slag down the fixed grate piece, and discharge it along the bottom surface of the inclined surface shell to the slag outlet, and enter the water sealing device. Dust and dust. At the same time, there is a waste heat recovery device inside the casing, which can recycle the heat generated by the combustion of sulfur mud and sulfur paste, saving energy and being green.

It can be seen from the above description that the conversion device has reasonable structural design, simple structure, strong practicability, simple operation and high operational reliability. The treatment of sulfur mud and sulfur paste is highly efficient and environmentally friendly.

The sulfur mud and sulfur paste conversion process of the present invention first ignites the sulfur mud and the sulfur paste in the above-mentioned sulfur mud and sulfur paste conversion device. The combustion is converted into sulfur dioxide and slag, and the sulfur dioxide is sent to a recovery device for recovery. It can be used to produce sulfurized products such as ammonium sulfite. The slag recovery can be used to prepare cement, and the waste heat generated by combustion is also recycled by the waste heat recovery device.

The sulfur mud and sulfur paste conversion process has the advantages of new process and reliable system operation, and can fully utilize sulfur mud and sulfur paste as much as possible in the prior art, and at the same time, low production cost and low energy consumption. The sulfurized product such as ammonium sulfite obtained by recovering sulfur dioxide gas has high economic value, and therefore the conversion process of the invention has important significance for protecting the environment and has good economic benefits.

DRAWINGS

FIG. 1 is a schematic structural view of a sulfur mud and sulfur paste conversion device according to an embodiment of the present invention.

Among them, 1 is the shell, 2 is the base bracket, 3 is the furnace gas outlet, 4 is the casing feeding end, 5 is the feeder, 6 is the shell slag end, 7 is the slag outlet, 8 is the water sealing device 9 is the bottom surface of the casing, 10 is the fixed grate piece, 11 is the wind chamber, 12 is the movable frame, 13 is the movable grate piece, 14 is the support frame, 15 is the pulley, 16 is the slide rail, 17 is the waste heat recovery device, 18 For the connecting rod, 19 is the driving device.

detailed description

As can be seen from Fig. 1, a sulfur mud and sulfur paste conversion device comprises a casing 1 and a base bracket 2 welded to the lower portion of the casing 1, and a furnace gas outlet 3 is provided on the top surface of the casing 1; The upper end of the material end 4 has a feeding port, and the feeder 5 is provided with a feeder 5, and the feeder 5 can deliver the sulfur mud and sulfur paste to be treated into the casing 1. The slag outlet 6 of the casing has a slag outlet 7 at the lower portion, and a water sealing device 8 is installed at the slag outlet 7, and the water sealing device 8 can block the air entering the device at the slag outlet 7 and can also function as a slag for dust reduction. Prevent slag dust from polluting the atmosphere and conducive to environmental protection. The bottom surface 9 of the casing is a sloped surface, and a fixed grate piece 10 is arranged and fixed step by step on the bottom surface 9 of the casing, and a wind chamber 11 is disposed below the fixed grate piece 10, and an inlet valve is installed in the air chamber 11. The air flow into the casing 1 is controlled by the inlet valve of the plenum 11 to achieve the purpose of controlling the sulfur dioxide gas content of the furnace gas outlet 3. A movable grate piece 13 is disposed between the two adjacent fixed grate pieces 10 of the fixed grate piece 10, and the movable grate piece 13 is fixed on the movable frame 12, and the movable frame 12 is located on the bottom surface 9 of the casing. Below. A plurality of support frames 14 are mounted on the bottom of the movable frame 12. The bottom end of the support frame 14 is connected to the slide rail 16 fixed to the base support 2 via a pulley 15; the support frame 14 is connected to the transmission device: the housing I A waste heat recovery device 17 is provided inside.

The transmission comprises a connecting rod 18 and a drive unit 19, which is connected to the drive unit 19 via a connecting rod 18.

The drive unit 19 is a motor or a hydraulic cylinder or a cylinder or cylinder.

The housing 1 is provided with a heat insulating material.

Sulfur mud and sulfur paste conversion process, including the following steps:

(2) The dried sulfur slurry and sulfur paste are sent to the feed port of the conversion device through the feeder 5, and the sulfur mud and the sulfur paste are distributed in the solid. The furnace row 10 and/or the movable grate piece 13;

(3) The sawdust is ignited and ignited, so that the inside of the casing 1 is gradually heated to the sulfur mud and the sulfur paste is ignited; the air chamber 11 controls the air intake amount of the air, so that the sulfur mud and the sulfur culture are fully burned, and the sulfur mud and the sulfur paste are converted into sulfur dioxide. Gas and slag; The generated sulfur dioxide gas enters the sulfur dioxide recovery device connected to the casing 1 from the furnace gas outlet 3 on the top surface of the casing to recover sulfur dioxide, and the sulfur dioxide recovery can produce sulfurized products such as ammonium sulfite. The slag moves along the bottom surface of the casing 9 to the slag outlet 7 of the casing 1 step by step, and the slag enters the water sealing device 8 located at the slag outlet 7 from the slag outlet 7 to recover the slag after the water seal; the sulfur sludge and the sulfur paste are burned to produce The waste heat is used for recycling by the waste heat recovery device 17.

The sulfur sludge and sulfur paste to be treated are sent to the casing 1 through the feeder 5, and the sulfur mud and the sulfur paste merge with the air sent from the air chamber 11 to ignite, so that the sulfur mud and the sulfur paste are in the casing 1. The sulfur dioxide gas generated by the combustion and combustion is discharged through the furnace gas outlet 3, enters the sulfur dioxide recovery device connected to the casing 1, and the sulfur dioxide is recovered and processed to produce a vulcanized product such as ammonium sulfite. Along the direction of the bottom end of the casing 9 from the feed end 4 of the casing to the slag end 6 of the casing, the movable grate 13 and the fixed grate 10 are alternately arranged. The thrust or tension provided by the motor or hydraulic cylinder or cylinder or cylinder of the driving device 19 acts on the support frame 14 through the connecting rod 18, and the pulley 15 connected to the bottom end of the support frame 14 is slid along the sliding rail 16 by the thrust or pulling force, and the support frame The 14 connected movable frames 12 are moved accordingly, so that the movable grate pieces 13 fixedly arranged on the movable frame 12 are reciprocated between the fixed grate pieces 10, and the reciprocating motion of the movable grate pieces 13 not only contributes to the slime The sulfur paste is sufficiently burned in the casing 1 of the apparatus, and the movable grate piece 13 can push the slag generated after the full combustion to the slag outlet 7 step by step, and enter the water sealing device 8 at the slag outlet 7.

Claims

Rights request

A sulfur slurry and sulfur paste conversion device, comprising: a casing and a base bracket welded to a lower portion of the casing; and a furnace gas outlet at a top surface of the casing: a feed inlet at an upper portion of the casing feeding end a feeding device is installed at the feeding port; a slag outlet is arranged at a lower portion of the slag outlet of the casing, and a water sealing device is installed at the slag outlet; the bottom surface of the casing is a sloped surface, and the fixed grate piece is arranged and arranged step by step on the bottom surface of the casing a wind chamber is arranged below the fixed grate piece, and the air chamber is provided with an inlet valve: a movable grate piece is arranged between two adjacent fixed grate pieces of the fixed grate piece, and the movable grate piece is fixed on the movable frame The movable frame is located directly below the bottom surface of the casing; the bottom of the movable frame is mounted with a plurality of supporting frames, and the bottom end of the supporting frame is connected to the sliding rail fixed on the base bracket by a pulley; the supporting frame is connected and transmitted a device; a waste heat recovery device is disposed inside the casing.

2. The slime and sulfur paste conversion device according to claim 1, wherein the transmission device comprises a connecting rod and a driving device, and the support frame is connected to the driving device via a connecting rod.

The sulfur slurry or sulfur paste conversion device according to claim 1, wherein the driving device is a motor or a hydraulic cylinder or a cylinder or a cylinder.

The sulfur slurry and sulfur paste conversion device according to claim 1, wherein the casing has a heat insulating material.

5. A sulfur mud and sulfur paste conversion process, including the following steps -

(2) The dried sulfur slurry and sulfur paste are sent to the feed port of the conversion device through the feeder, and the sulfur mud and the sulfur paste are distributed on the fixed furnace row and/or the movable grate sheet;

(3) The sawdust is ignited and ignited, so that the shell is heated up to the sulphur mud and the sulphur paste is ignited; the air chamber controls the intake air of the air, so that the sulphur and sulphur paste are fully burned, the sulphur and sulphur paste are converted into sulphur dioxide gas and The sulphur dioxide gas generated from the furnace gas outlet on the top surface of the casing enters the sulfur dioxide recovery device connected to the casing to recover the sulfur dioxide; the slag moves along the bottom surface of the casing to the slag outlet of the casing step by step, and the slag is slag The outlet enters the water sealing device located at the outlet of the slag, and the slag is recovered after the water seal; the waste heat generated by the combustion of the sulfur mud and the sulfur paste is used for recycling by the waste heat recovery device.