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Production system of low-chlorine potassium sulfate

A production system, technology of potassium sulfate, applied in the field of production system of low-chlorine potassium sulfate, can solve problems such as increasing costs, and achieve the effects of saving production costs, reducing consumption, and fully reacting raw materials

Pending Publication Date: 2021-01-01
青岛碱业钾肥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this scheme, a new reactor needs to be added for production, which increases the cost

Method used

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  • Production system of low-chlorine potassium sulfate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, the production system of the low chloride potassium sulfate described in the present embodiment comprises a first Mannheim furnace 1, a first screening device, a first crushing device 2, a mixing device 3 and a second Mannheim furnace 4. The potassium sulfate product in the first Mannheim furnace 1 enters the first screening device for screening, and the screened oversize enters the first crushing device 2, and the pulverized oversize is mixed with concentrated sulfuric acid in the mixing device 3, The mixture enters the second Mannheim furnace 4 for heating reaction to obtain potassium sulfate perchlorate.

[0044] The first Mannheim furnace 1 includes four sets, and each first Mannheim furnace 1 is respectively connected with a first screening device, and each first screening device is connected with a first crushing device 2, and each first The crushing devices 2 communicate with the mixing device 3 respectively.

[0045] In another solut...

Embodiment 2

[0056] Such as figure 1 As shown, what is described in this embodiment is the further limitation of the above-mentioned embodiment one. The mixing device 3 has a stirring device and a spraying device. The concentrated sulfuric acid enters the mixing device 3 in a mist form through the spraying device. Mix with sieve. Because the consumption of the concentrated sulfuric acid is very little compared with the solid granular sieve, the concentrated sulfuric acid is sprayed into the mixing device 3 in the form of spraying, so that the mist droplets formed by the concentrated sulfuric acid can be wrapped on the surface of the solid particles, and after stirring The mixing of the two is more uniform, which is beneficial to the subsequent reaction of the second Mannheim furnace 4 to proceed more fully.

[0057] In this embodiment, a mixing device with a stirring device and a spraying device is used to spray concentrated sulfuric acid into the oversize material in the form of a spray,...

Embodiment 3

[0059] What is described in this embodiment is a further limitation of the above-mentioned embodiment one, the combustion chamber of the first Mannheim furnace is provided with a flue gas outlet, the second Mannheim furnace is provided with a flue gas inlet, and the first Mannheim furnace is provided with a flue gas inlet. The flue gas outlet of the Heim furnace is connected with the flue gas inlet of the second Mannheim furnace through a pipeline. When using the Mannheim method to produce potassium sulfate in the existing process, since the raw material sulfuric acid is liquid, it will corrode the hearth of the Mannheim furnace and easily cause acid leakage. Generally, the flue gas is not passed into the bottom of the furnace to reuse the heat energy. In this embodiment, the concentrated sulfuric acid and the oversize are mixed in the mixing device to become solid, and then enter the second Mannheim furnace. There is no liquid concentrated sulfuric acid, and there is no corros...

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Abstract

The invention discloses a production system of low-chlorine potassium sulfate. The production system comprises a first Mannheim furnace, a first screening device, a first crushing device, a mixing device and a second Mannheim furnace, a potassium sulfate product in the first Mannheim furnace enters the first screening device and is screened, the oversize product obtained after screening enters thefirst crushing device, the crushed oversize product is mixed with concentrated sulfuric acid in the mixing device, and the obtained mixture enters the second Mannheim furnace and undergoes a heatingreaction to obtain the low-chlorine potassium sulfate. Corresponding devices are connected in sequence, the oversize product in discharge of the first Mannheim furnace is further treated, raw materialreaction is more sufficient, continuous production of low-chlorine potassium sulfate is achieved, the oversize product reacts in the second Mannheim furnace, existing production devices can be fullyutilized for manufacturers producing potassium sulfate through a Mannheim method, and on the basis of existing production equipment, the building of the production system can be completed only by changing a material conveying mode, so the cost investment is saved.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, in particular to a production system of low-chlorine potassium sulfate. Background technique [0002] In the prior art, the industrialized production of potassium sulfate mostly adopts the Mannheim method, with potassium chloride and concentrated sulfuric acid as raw materials, which are continuously put into a Mannheim furnace according to a certain proportion for reaction to generate potassium sulfate. The specific reaction process includes the following two steps: [0003] KCl+H 2 SO 4 →KHSO 4 +HCl [0004] KCl+KHSO 4 →K 2 SO 4 +HCl [0005] The above two-step reactions are all heterogeneous reactions. Affected by factors such as uneven heating in the reaction process, the potassium bisulfate generated in the first step reaction is often coated on the surface of potassium chloride, which hinders the further progress of the reaction and causes the product Chlorine c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/02
CPCC01D5/02
Inventor 孙新德姜杰王金台孙高峰
Owner 青岛碱业钾肥科技有限公司
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