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Composite bed reactor and method for combined production of calcium carbide, gas and tar

A reactor and compound bed technology, applied in the field of compound bed reactors, can solve the problems of small particle raw material gas flow interference loss, high pollution, high energy consumption, etc. Effect

Active Publication Date: 2013-09-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem of "high investment, high energy consumption and high pollution" in the production of calcium carbide. Through a lot of research and creative work, the inventor has developed a kind of product with simple structure and operation, high efficiency, low energy consumption and wide source of raw materials. The low-cost reactor and method for the co-production of calcium carbide, gas and tar not only solves the problem of contact between large particles of coke and calcium oxide or the problem of loss of small particles of raw materials due to air flow interference, but also realizes high temperature gas in the furnace. Direct and efficient heat exchange of raw materials to optimize heat utilization

Method used

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  • Composite bed reactor and method for combined production of calcium carbide, gas and tar

Examples

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Effect test

Embodiment 1

[0032] A composite bed reactor for the co-production of calcium carbide, gas and tar, such as figure 1 shown. The reactor includes a hopper 1, a moving bed preheating chamber 2, a tar trap 3, a gas discharge port 4, a rotary distributor 5, an oxygen hot chamber 6, an oxygen injection burner 7, a product molten pool 8, and a product discharge port. 9 and the gate silo 10, etc., there is one hopper 1, which is located on the top of the central axis of the reactor, the bottom of the hopper 1 is communicated with the gate silo 10, the gate silo 10 is communicated with the moving bed preheating chamber 2, and the moving bed preheating chamber 2 is connected. A tar catcher 3 is provided on the top side of the hot chamber 2, a gas discharge port 4 is provided on the tar catcher 3, a rotary distributor 5 is provided at the bottom of the moving bed preheating chamber 2, and the moving bed preheating chamber 2 passes through the rotary distributor 5 is communicated with the oxygen hot ...

Embodiment 2

[0039] A method for co-producing calcium carbide, coal gas and tar using the reactor described in Example 1, comprising the following steps:

[0040] A. Raw material molding: pulverized coal and carbide slag (containing 90% calcium hydroxide) are used as raw materials, in which the fixed carbon content of the pulverized coal is 70%, the volatile content is 22%, and the ash content is 8%; the C content is 76% %. Grind and sieve the raw materials, select powders below 120 mesh, mix them according to the ratio of C / Ca molar ratio of 16:1, and use a tablet machine to form columnar particles with a diameter of 30mm and a height of 40-60mm after stirring evenly.

[0041] b. Raw material transportation and preheating: the raw material particles obtained in the above step A are sent to the hopper 1, and then sent to the moving bed preheating chamber 2 through the gate silo 10, and the feeding speed and the motor speed of the rotary distributor 5 are adjusted to control the The spee...

Embodiment 3

[0045] A method for co-producing calcium carbide, coal gas and tar using the reactor described in Example 1, comprising the following steps:

[0046] A. Raw material granulation: using coke and calcium oxide as raw materials, the C content in the coke is about 90%, the ash content is about 8%, and the purity of the calcium oxide is about 90%. Grind and sieve the raw materials, select powders below 60 mesh, mix them according to the ratio of C / Ca molar ratio of 9:1, spray and add water after stirring evenly, and finally use a roller extrusion molding machine to form small balls with a particle size of 30mm.

[0047] b. Raw material transportation and preheating: the raw material particles obtained in the above step A are sent to the hopper 1, and then sent to the moving bed preheating chamber 2 through the gate silo 10, and the feeding speed and the motor speed of the rotary distributor 5 are adjusted to control the The speed at which the granular raw material moves down in t...

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Abstract

The invention relates to a composite bed reactor and a method for combined production of calcium carbide, gas and tar, and belongs to the field of calcium carbide production. The reactor comprises a hopper, a brake bunker, a moving bed preheating chamber, a tar collector, a gas outlet, a distributing device, an oxygen heat reaction chamber, oxygen spraying burners, a product molten pool and a product outlet, and the hopper is connected with the moving bed preheating chamber by the brake bunker, and the top side surface of the moving bed preheating chamber is provided with the tar collector, and the tar collector is provided with a gas outlet, and the moving bed preheating chamber bottom is provided with a distributing device, and the moving bed preheating chamber is communicated with an oxygen heat reaction chamber by a distributing device, and the oxygen heat reaction chamber bottom is connected with a product molten pool, and the upper portion of the connection between the oxygen heat reaction chamber and the product molten pool is provided with the oxygen spraying burner, and the middle bottom of the product molten pool is provided with a product outlet. The reactor of the invention has the advantages of simple structure and high efficiency, and large scale production is easy to realize, and the raw material is pelleted by powder form carbonaceous raw material and powder form calcium containing raw material, and the contact surface between raw materials is large, the reaction rate is fast, and reactor is convenient for reusing calcium carbide slags.

Description

technical field [0001] The invention relates to a composite bed reactor and method for co-producing calcium carbide, coal gas and tar, in particular to the molding of powdered carbon-containing raw materials and powdered calcium-containing raw materials, direct combustion of part of the carbon-containing raw materials for heating production of calcium carbide, combustion product gas and Calcium carbide furnace gas naturally rises to the upper part of the reactor to continuously exchange heat with the raw materials, and the hot gas is cooled and the raw materials are preheated and then reacted. Background technique [0002] Calcium carbide commonly known as calcium carbide (CaC 2 ), known as the mother of organic synthesis before the middle of the last century. At present, it is mainly used to produce a series of products such as vinyl chloride, vinyl acetate and acrylic acid. For example, about 70% of PVC (polyvinyl chloride) production in China originates from the calcium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/08C01B31/32C10B53/04C10J3/66C01B32/942
Inventor 刘振宇刘清雅王仁醒屈一新李成岳刘辉
Owner BEIJING UNIV OF CHEM TECH
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