Device for preparing ammonium sulfate and sodium chloride from ammonium chloride and mirabilite

Abstract

The utility model discloses a device for preparing ammonium sulfate and sodium chloride from ammonium chloride and mirabilite, belongs to the technical field of chemical engineering, and relates to an alkali preparation device. A device for preparing ammonium sulfate and sodium chloride from ammonium chloride and mirabilite comprises a sodium chloride device and an ammonium sulfate device which are respectively connected with a double salt reaction device through pipelines, the double salt reaction system comprises an ammonium chloride storage tank and a mirabilite storage tank which are respectively connected with a reaction tank through pipelines, and a temperature controller is arranged on the reaction tank; the sodium chloride device comprises a mixed salt evaporation device and an ammonium chloride evaporation device which are connected through a pipeline; the ammonium sulfate device comprises a mixed salt refining device, a double salt refining device and an ammonium sulfate evaporation device which are sequentially connected through pipelines. The device is simple in structure and convenient to operate, comprehensive utilization of ammonium chloride can be realized, and the operation cost of an enterprise is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical industry, relates to an alkali making device, and specifically relates to a device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and mirabilite. Background Art

[0002] With the development of the alkali and chemical industries, the production of byproduct ammonium chloride has increased year by year. Currently, the main consumption channel for ammonium chloride in my country is in the form of nitrogen-containing compound fertilizers, which are suitable for crops such as rice, cotton, and vegetables. In the industrial field, ammonium chloride is used in dry cell batteries, storage batteries, metallurgy, and electroplating.

[0003] However, the existing application of by-product ammonium chloride still has the disadvantages of low economic value and environmental unfriendliness. Therefore, how to make full use of the excess ammonium chloride production capacity and achieve efficient application of ammonium chloride not only has high economic value, but also can make full use of resources to achieve sustainable development of the environment and resources, which is of far-reaching significance.

[0004] In order to solve the above-mentioned defects in the prior art, a device for regenerating ammonium chloride which is a by-product of chemical industry or a by-product of preparing soda ash by the soda process has been developed. Utility Model Content

[0005] The utility model aims to provide a device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and sodium sulfate.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A device for preparing ammonium sulfate and sodium chloride using ammonium chloride and mirabilite, comprising a sodium chloride device and an ammonium sulfate device respectively connected to a double salt reaction device through pipelines;

[0008] The double salt reaction system includes an ammonium chloride storage tank and a sodium sulfate storage tank respectively connected to the reaction tank through pipelines, and a temperature controller is provided on the reaction tank;

[0009] The sodium chloride device includes a mixed salt evaporation device and an ammonium chloride evaporation device connected by pipelines;

[0010] The ammonium sulfate device comprises a mixed salt refining device, a double salt refining device and an ammonium sulfate evaporating device which are sequentially connected through pipelines.

[0011] Furthermore, the mixed salt evaporation device is connected to the reaction tank through a pipeline to form a circulation.

[0012] The ammonium chloride evaporation device is connected to the reaction tank through a mother liquor pipeline and a steam pipeline respectively to form a cycle.

[0013] The mixed salt refining device is connected to the reaction tank through a pipeline to form a circulation.

[0014] The double salt refining device forms a reverse cycle with the mixed salt refining device through pipelines.

[0015] The ammonium sulfate evaporation device forms a reverse cycle with the double salt refining device through a pipeline.

[0016] When the device of the utility model is used to prepare ammonium sulfate and sodium chloride, it includes a double salt reaction process, a sodium chloride process, and an ammonium sulfate process. The by-product ammonium chloride and sodium sulfate are reacted in the double salt reaction process to generate double salt I. The reaction temperature is controlled at 0-25°C and the reaction time is 1-2 hours. The generated double salt I enters the ammonium sulfate system, and the generated MⅠ enters the sodium chloride system. The sodium chloride system is mainly composed of a mixed salt evaporation process, a sodium chloride evaporation process and an auxiliary system. The mixed salt evaporation process mainly evaporates MⅠ in the mixed salt evaporation process, and by controlling the temperature at the boiling point of the solution at 105-110℃, separates mixed salt I and mother liquor MIV, and the mixed salt I returns to the double salt reaction process, and the mother liquor MIV enters the sodium chloride evaporation process; the sodium chloride evaporation process evaporates the mother liquor MIV in the sodium chloride evaporation process, and by controlling the temperature at the boiling point of the solution at 108-112℃, separates sodium chloride and mother liquor MV, wherein the mother liquor MV returns to the double salt reaction process; the ammonium sulfate system is mainly composed of a mixed salt refining process, a double salt refining process, an ammonium sulfate evaporation process and an auxiliary system. The preparation process is to evaporate the double salt I, control the separation point of the mixed salt process (106-110°C), and obtain mixed salt II and mother liquor MII; the mixed salt II returns to the double salt reaction process, and the mother liquor MII enters the double salt refining process; the double salt refining process is to cool and precipitate the mother liquor MVI from the mother liquor MII and the ammonium sulfate process in the double salt refining process, control the cooling temperature to 28-35°C, and centrifuge the double salt II and mother liquor MIII; the double salt II returns to the mixed salt refining process, and the mother liquor MIII enters the ammonium sulfate evaporation process; the ammonium sulfate evaporation process is to evaporate the mother liquor MIII in the ammonium sulfate evaporation process, control the separation temperature of the ammonium sulfate evaporation process to 108-112°C, separate the product ammonium sulfate and mother liquor MVI, and the mother liquor MVI returns to the double salt refining process.

[0017] The utility model provides a device for regenerating ammonium chloride which is a by-product of chemical industry or a by-product of preparing soda ash by a combined alkali process. The device has a simple structure and is easy to operate, can realize the comprehensive utilization of ammonium chloride, and reduce the operating costs of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] In the figure: 1-double salt reaction unit, 2-sodium chloride unit, 3-ammonium sulfate unit, 4-reaction tank, 5-mixed salt evaporation unit, 6-ammonium chloride evaporation unit, 7-mixed salt refining unit, 8-double salt refining unit, 9-ammonium sulfate evaporation unit. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1 The device shown uses ammonium chloride and thenardite to prepare ammonium sulfate and sodium chloride for completing the above method, including a sodium chloride device 2 and an ammonium sulfate device 3 respectively connected to a double salt reaction device 1 via pipelines; the double salt reaction system 1 includes an ammonium chloride storage tank and a thenardite storage tank respectively connected to a reaction tank 4 via pipelines, and the reaction tank 4 is provided with a temperature controller; the sodium chloride device 2 includes a mixed salt evaporation device 5 and an ammonium chloride evaporation device 6 connected via pipelines; the ammonium sulfate device 3 includes a mixed salt refining device 7, a double salt refining device 8, and an ammonium sulfate evaporation device 9 sequentially connected via pipelines.

[0022] Among them, the mixed salt evaporation device 5, the ammonium chloride evaporation device 6, and the mixed salt refining device 7 are respectively connected to the reaction tank 4 through pipelines to form a circulation; the double salt refining device 8 forms a reverse circulation with the mixed salt refining device 7 through the pipeline, and the ammonium sulfate evaporation device 9 forms a reverse circulation with the double salt refining device 8 through the pipeline.

[0023] During operation, the chemical by-product containing ammonium chloride and sodium sulfate are reacted in a double salt reaction process, the reaction temperature of the double salt reaction process is 0-25°C, the reaction time is 1-2h, and double salt I and mother liquor I are generated; the mother liquor I enters the mixed salt evaporation process, the temperature of the mixed salt evaporation process is controlled at the boiling point of the separation point solution 105-110°C, to generate mixed salt I and mother liquor IV; the mixed salt I enters the double salt reaction process for recycling, the mother liquor IV enters the sodium chloride evaporation process, the reaction temperature of the sodium chloride evaporation process is 108-112°C, and sodium chloride and mother liquor V are separated; The mother liquor V and the evaporated condensate enter the double salt reaction process and are recycled; the double salt I is input into the mixed salt refining process, the reaction temperature of the mixed salt refining process is 106-110°C, and mixed salt II and mother liquor II are generated; the mixed salt II enters the double salt reaction process and is recycled, the mother liquor II enters the double salt refining process for cooling and precipitation, the cooling temperature is controlled at 28-35°C, and centrifugation is performed to obtain double salt II and mother liquor III; the double salt II enters the mixed salt refining process and is recycled, the mother liquor III enters the ammonium sulfate evaporation process for evaporation, and the temperature is controlled at 108-112°C.

[0024] The above description of the utility model is illustrative rather than restrictive. Those skilled in the art understand that many modifications, changes or equivalents may be made thereto within the spirit and scope defined by the claims, but they will all fall within the scope of protection of the utility model patent.

Claims

1. A device for preparing ammonium sulfate and sodium chloride using ammonium chloride and sodium sulfate, characterized in that: It includes a sodium chloride device and an ammonium sulfate device respectively connected to the double salt reaction device through pipelines; The double salt reaction device includes an ammonium chloride storage tank and a sodium sulfate storage tank respectively connected to the reaction tank through pipelines, and a temperature controller is provided on the reaction tank; The sodium chloride device includes a mixed salt evaporation device and an ammonium chloride evaporation device connected by pipelines; The ammonium sulfate device comprises a mixed salt refining device, a double salt refining device and an ammonium sulfate evaporating device which are sequentially connected through pipelines.

2. The device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and sodium sulfate according to claim 1, wherein: The mixed salt evaporation device is connected to the reaction tank through a pipeline to form a cycle.

3. The device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and sodium sulfate according to claim 1, wherein: The ammonium chloride evaporation device is connected to the reaction tank through a mother liquor pipeline and a steam pipeline respectively to form a cycle.

4. The device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and sodium sulfate according to claim 1, wherein: The mixed salt refining device is connected to the reaction tank through a pipeline to form a circulation.

5. The device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and sodium sulfate according to claim 1, wherein: The double salt refining device forms a reverse cycle with the mixed salt refining device through pipelines.

6. The device for preparing ammonium sulfate and sodium chloride by utilizing ammonium chloride and sodium sulfate according to claim 1, characterized in that: The ammonium sulfate evaporation device forms a reverse cycle with the double salt refining device through a pipeline.

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