Process and device for producing (NH4)2SO4 fertilizer by using ammonium sulfite solution

A technology of ammonium sulfite and 2SO4, applied in fertilization devices, ammonium salt fertilizers, nitrogen fertilizers, etc., can solve the problems of low oxidation rate, high temperature, long reaction time, etc., and achieve sufficient mass transfer, improved mass transfer efficiency, and production environment Improved effect

Inactive Publication Date: 2010-02-10
洛阳市天誉环保工程有限公司
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Problems solved by technology

[0003] To solve the traditional (NH 4 ) 2 SO 3 Oxidation process adopts air pressurization and directly blows into the method, the problem of long reaction time and low oxidation rate, the invention provides a kind of preparation (NH 4 ) 2 SO 4 The process and equipment of chemical fertilizers make full use of the oxygen in the air, so that the reaction efficiency is improved, the reaction time is shortened, and the conversion rate is increased.

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  • Process and device for producing (NH4)2SO4 fertilizer by using ammonium sulfite solution

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Embodiment Construction

[0021] Such as figure 1 Shown: a preparation with ammonium sulfite solution (NH 4 ) 2 SO 4 The process of chemical fertilizer is to absorb SO with ammonia liquid in the ammonia flue gas desulfurization device 2 The resulting ammonium sulfite solution (NH 4 ) 2 SO 3 , produced by self-inhalation air oxidation (NH 4 ) 2 SO 4 The process of chemical fertilizer, its steps are as follows:

[0022] 1. Using self-absorption air oxidation, the ammonium sulfite (NH 4 ) 2 SO 3 After the solution is pressurized by the liquid inlet pump 13, it is input into the liquid inlet ejector 9 on the top of the oxidation tank 2. While the solution is sprayed into the oxidation tank 2 at a high speed, the liquid inlet ejector 9 utilizes the vacuum formed when the high-speed liquid flow passes through the vacuum chamber. Inhale the atmosphere directly from the suction port, and the high-speed liquid flow cuts the air into extremely fine air particles, which greatly increases the gas-liqui...

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Abstract

The invention discloses a process and a device for producing a (NH4)2SO4 fertilizer by using an ammonium sulfite solution. In an ammonia-process flue gas desulfurization device, by using the ammoniumsulfite solution (NH4)2SO3 produced after ammonia absorbs SO2, the outlet of a liquid inlet ejector (9) is led into the solution at the middle lower part of an oxidation tank (2) by a downcomer through a oxidization preparation process of (NH4)2SO4 fertilizer by self-absorption of air so as to increase the reaction time; and the medium is fully oxidized through the three-stage cyclic oxidation. The cyclic oxidation procedure comprises liquid at the lower part of the oxidation tank (2), a recycle pump (4), a recycle liquid ejector and the middle lower part of the oxidation tank. Air is absorbedin the liquid inlet ejector, and sheared by liquid flows and dispersed into tiny air particles, so that the contact specific area of the gas and the liquid is increased by tens of times compared withthe bubbling oxidization, thereby fully utilizing the oxygen in the air. Therefore, the process enhances the reaction efficiency, shortens the reaction times and increases the conversion rate.

Description

technical field [0001] The present invention relates to (NH 4 ) 2 SO 4 The technical field of chemical fertilizer production, especially suitable for a kind of preparation of ammonium sulfite solution (NH 4 ) 2 SO 4 Fertilizer technology and equipment. Background technique [0002] SO in boiler flue gas 2 After being absorbed by ammonia liquid, it forms (NH 4 ) 2 SO 3 , while the recovered by-products in flue gas desulfurization are (NH 4 ) 2 SO 4 (as a chemical fertilizer, it is easy to sell in the market), so in the ammonia desulfurization process, it is necessary to use (NH 4 ) 2 SO 3 Oxidized to (NH 4 ) 2 SO 4 , This oxidation process adopts self-priming air oxidation, which has the lowest cost and is the easiest to control. Traditional (NH 4 ) 2 SO 3 The oxidation technology adopts the method of blowing the air directly into the liquid layer in the oxidation tank after being pressurized by the blower for bubbling oxidation. Due to the large bubbles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05C3/00
Inventor 史选增李清林
Owner 洛阳市天誉环保工程有限公司
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