Pressurized moving bed oxygen thermal method calcium carbide gas integrated production equipment

Abstract

The invention relates to pressurized moving bed oxygen thermal method calcium carbide gas integrated production equipment. The equipment comprises a calcium carbide gasifier, a first gasifier body isarranged above the waist of a gasifier body of the calcium carbide gasifier, and a second gasifier body is arranged below the waist. The top of the first furnace body is of a frustum body structure, and a distribution cylinder with a hyperbolic section is longitudinally arranged in the middle of the frustum body structure; and an annular gas collection chamber is formed by a cavity between the material distribution cylinder and the inner wall of the frustum body structure. The bottom of the gas collecting chamber is communicated with the furnace chamber of the first furnace body, and the top of the gas collecting chamber is provided with a gas collecting chamber outlet for outputting calcium carbide furnace gas to the outside of the furnace body. The plurality of oxygen nozzles are arranged around the waist of the furnace body. A hearth for accommodating liquid calcium carbide is arranged in the second furnace body; a calcium carbide outlet is formed in the second furnace body; a heavycalcium carbide outlet is formed in the bottom of the second furnace body. According to the invention, fully-closed safe operation of calcium carbide production can be realized, raw material and power consumption is reduced, carbon emission is reduced, and the environment is improved.

Description

technical field [0001] The invention relates to the technical field of calcium carbide production, in particular to a pressurized moving bed calcium carbide gas integrated production equipment. Background technique [0002] The main component of calcium carbide is calcium carbide (CaC 2 ), with many follow-up processes, known as "the mother of organic synthesis". Calcium carbide acetylene chemical industry is the most important branch of coal chemical industry, the main downstream products are polyvinyl chloride, polyethylene, BDO, vinyl acetate and so on. [0003] According to statistics from the China Chlor-Alkali Industry Association, the output of calcium carbide products in my country in 2019 was 27.95 million tons. The output of polyvinyl chloride was 20.11 million tons, of which calcium carbide acetylene method accounted for 81.3%, and the consumption of calcium carbide was about 21.5 million tons, accounting for 83% of the total consumption of calcium carbide. [...

AI Technical Summary

Problems solved by technology

Second, intrinsically safe performance is low

At present, the widely used airtight calcium carbide furnace is actually not completely airtight. Abnormal working conditions such as leakage of furnace gas or air inhalation, leakage of electrode cooling water, capping on the surface of materials, and soft and hard breakage of electrodes often occur during normal pressure operation. A little carelessness can cause explosions, furnace spraying, poisoning, burns, and generally large-scale accidents

Third, product quality should not be controlled

Due to the uneven temperature of the three-point heating furnace in the production of calcium carbide by the electric arc method, the unreacted calcium oxide in the calcium carbide product is generally more than 12%, resulting in the calcium carbide product CaC 2 The content can only reach about 80%, which not only hinders the quality improvement of calcium carbide products, but also leads to the waste of calcium oxide raw materials

Fourth, the production environment is poor

[0008] At present, although the results of domestic and foreign experimental research all believe that the energy-saving effect is remarkable, but because of the serious problems in the furnace design and engineering process, it has not been applied in industry so far.

The main problems are, first, the energy utilization of the device is unreasonable, and the consumption of raw materials (mainly carbon materials) is too large

Second, the quality of calcium carbide products cannot meet the requirements of industrial grades

Third, the safety of the test device is poor, and some serious accidents occurred during the test run of some domestic and foreign test devices

Fourth, the tail gas products of calcium carbide furnaces have not been well utilized

Therefore, these experimental research results have only achieved phased conclusions. From the perspective of product quality, comprehensive cost and system safety, the experimental results cannot be applied to industrial production. Reasons to scale

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