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A multi-tubular moving bed reaction device for producing ammonia and hydrogen chloride by pyrolysis and separation of ammonium chloride

A technology of moving bed reactor and reaction device, which is applied in the direction of chlorine/hydrogen chloride, preparation with chloride, preparation/separation of ammonia, etc. It can solve the problems of lack of introduction of reactor type, structure and operating conditions, etc., and achieve repeatability and Make full use of and realize the effect of heat

Active Publication Date: 2018-03-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, most of the patent documents disclosed so far and other documents only relate to the principle and process of ammonium chloride decomposition and separation, and lack the introduction of special reactors for the pyrolysis process of ammonium chloride, especially the lack of reactor types, Introduction to structure and operating conditions

Method used

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  • A multi-tubular moving bed reaction device for producing ammonia and hydrogen chloride by pyrolysis and separation of ammonium chloride
  • A multi-tubular moving bed reaction device for producing ammonia and hydrogen chloride by pyrolysis and separation of ammonium chloride
  • A multi-tubular moving bed reaction device for producing ammonia and hydrogen chloride by pyrolysis and separation of ammonium chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0082] Taking the device that handles 10,000 tons of ammonium chloride per year as an example, the ammonium chloride chemical chain recycling ammonia and hydrogen chloride release process and chlorine release process are all carried out in a horizontal tube moving bed reactor ( figure 2 with image 3 ). exist image 3 In the chlorine release device shown, the reaction material is the solid phase material obtained after the ammonia release process, that is, a mixture of magnesium oxide (chemical chain cycle carrier) and magnesium hydroxychloride, and the mass flow rate of the mixture feed is 2.3t / h, of which the oxidation The molar ratio of magnesium to hydroxymagnesium chloride is about 1:2. At the same time, during the reaction process, a certain amount of atmospheric pressure water vapor is reversed into the cylinder, and the water vapor is provided by a vaporizer at 200°C. Combustion nozzles are evenly arranged on the upper part of the flue gas chamber, and the volume fl...

Embodiment 2

[0086] Still taking the annual processing capacity of 10,000 tons of ammonium chloride as an example, the ammonium chloride chemical chain recycling ammonia and hydrogen chloride release process and chlorine release process are all carried out in the vertical pipe moving bed reactor ( Figure 4 with Figure 5 ). exist Figure 5 In the shown chlorine release device, the reaction material is the solid-phase material obtained after the ammonia release process, that is, a mixture of magnesium oxide (chemical chain cycle carrier) and magnesium hydroxychloride, and the mass flow rate of the mixture feed is 2.3t / h, of which magnesium oxide The molar ratio to hydroxymagnesium chloride is about 1:2. At the same time, during the reaction process, a certain amount of atmospheric pressure water vapor is reversed into the tube, and the water vapor is provided by a vaporizer at 200°C. The volume flow rate at normal temperature is about 0.28m 3 The air and volume flow rate of / s is about ...

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Abstract

The invention discloses a multi-tube moving bed reaction device for preparing ammonia and hydrogen chloride by virtue of pyrolysis separation of ammonium chloride. The multi-tube moving bed reaction device comprises an ammonia releasing device and a chloride releasing device, wherein the ammonia releasing device and the chloride releasing device are respectively provided with one or more feeding holes and discharging holes and are multi-tube moving bed reactors, a solid discharging hole of the ammonia releasing device is connected with a solid feeding hole of the chloride releasing device, and a solid discharging hole of the chloride releasing device is connected with a carrier feeding hole of the ammonia releasing device; and meanwhile, a heat supply channel of the chloride releasing device is connected with a heat supply channel of the ammonia releasing device, the chloride releasing device is heated by virtue of combustion, and the ammonia releasing device is heated by virtue of high temperature flue gas produced after the combustion. According to the multi-tube moving bed reaction device, by mounting a large amount of heat exchanging row tubes in reactors, sufficient heat exchanging areas are provided, and the heat exchanging requirements of pyrolysis of ammonium chloride are met; meanwhile, by utilizing a proper structure and operation conditions, the requirements on the pyrolysis reaction and flow of ammonium chloride are met, and the large-scale continuous industrial production can be realized; and meanwhile, the multi-tube moving bed reaction device can be applied to a sodium carbonate-chloroethylene coproduction process.

Description

technical field [0001] The invention relates to chemical reaction equipment, in particular to a multi-tubular moving bed reaction device for producing ammonia and hydrogen chloride by pyrolysis and separation of ammonium chloride. Background technique [0002] The joint soda production method in soda ash production uses sodium chloride, carbon dioxide and synthetic ammonia as raw materials to produce soda ash and ammonium chloride. Ammonium chloride as a fertilizer is likely to cause soil acidification and compaction. The market is very limited, the price has been falling all the way, and there is a large backlog of ammonium chloride Has become the bottleneck of the development of the soda ash industry. If the ammonium chloride can be decomposed and separated into ammonia gas and hydrogen chloride, the ammonia gas can be recycled for alkali production, and hydrogen chloride can be used for the production of vinyl chloride or hydrochloric acid, on the one hand, the market out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/02C01B7/05
CPCC01B7/055C01C1/026
Inventor 李希潘腾班衡成有为王丽军
Owner ZHEJIANG UNIV
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