Trichloroisocyanuric acid mother liquor chlorine recovery system

Abstract

A trichloroisocyanuric acid mother liquor chlorine recovery system comprises a mother liquor tank and a hydrochloric acid tank, the mother liquor tank is communicated with the bottom of a dechlorination tank through a pump body and a pipeline, the hydrochloric acid tank is communicated with the top of a dechlorination tower through a pump body and a pipeline, and the bottom of the dechlorination tower is communicated with the top of the dechlorination tank. The dechlorination tank is also communicated with the top of the dechlorination tower through a pump body and a pipeline, and the top of the dechlorination tower is also communicated with chlorine recovery equipment. By optimizing the structure, the trichloroisocyanuric acid mother liquor chlorine gas recycling system is formed, the acidity of the mother liquor is increased, the air volume of the blow-off tower is reduced, the air content in the blown chlorine gas is reduced, the recycled chlorine gas is used for producing a sodium monochloroisocyanate intermediate, and the recycling is ensured.

Description

Technical Field

[0001] The utility model relates to chemical equipment, in particular to a trichloroisocyanuric acid mother liquor chlorine recovery system. Background Art

[0002] The mass concentration of sodium chloride in trichloroisocyanuric acid mother liquor is about 100g / L, and the mass concentration of free chlorine is 6.5-8.5g / L. The mother liquor treatment process is as follows: Acid is added to the mother liquor for acidification, and chlorine is recovered to the chlorination station through two-stage vacuum dechlorination and a first-stage dechlorination blowing tower. The recovered chlorine is used to chlorinate cyanuric acid to produce a sodium monochloroisocyanate intermediate, and the sodium monochloroisocyanate intermediate is deeply chlorinated again to produce a trichloroisocyanuric acid product to achieve comprehensive utilization of wastewater.

[0003] The traditional purge tower has a large air volume, and the chlorine gas blown out contains a large amount of air. The chlorine gas blown out cannot be reused and cannot be recycled. Utility Model Content

[0004] In order to solve the above problems, the utility model aims to provide a trichloroisocyanuric acid mother liquor chlorine recovery system.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a trichloroisocyanuric acid mother liquor chlorine recovery system, comprising a mother liquor tank and a hydrochloric acid tank, the mother liquor tank is connected to the bottom of a dechlorination tank through a pump body and a pipeline, the hydrochloric acid tank is connected to the top of a dechlorination tower through a pump body and a pipeline, the bottom of the dechlorination tower is connected to the top of the dechlorination tank, the dechlorination tank is also connected to the top of the dechlorination tower through a pump body and a pipeline, and the top of the dechlorination tower is also connected to a chlorine recovery device.

[0006] Furthermore, there are multiple groups of dechlorination tanks and dechlorination towers, and the pipelines connecting the mother liquid tank, the hydrochloric acid tank, the dechlorination tanks and the dechlorination towers are also provided with control valves respectively.

[0007] Furthermore, there are three groups of dechlorination tanks and dechlorination towers, and the mother liquid tank is connected to the first group of dechlorination tanks through a pump body, a pipeline and a control valve, the first group of dechlorination tanks is connected to the second group of dechlorination tanks through a pipeline and a valve, and the second group of dechlorination tanks is connected to the third group of dechlorination tanks through a pipeline and a valve.

[0008] Furthermore, the discharge end of the third group of dechlorination tanks is also connected to a triple-effect evaporation device.

[0009] Furthermore, the bottom of the third group of dechlorination towers is connected to the air inlet end of the fan.

[0010] Furthermore, each group of dechlorination tanks is connected to the corresponding dechlorination tower through a circulation pump body and a pipeline.

[0011] The utility model has the advantages that the structure is optimized, that is, the mother liquid tank is connected with the bottom of the dechlorination tank through a pump body and a pipeline, the hydrochloric acid tank is connected with the top of the dechlorination tower through a pump body and a pipeline, the bottom of the dechlorination tower is connected with the top of the dechlorination tank, the dechlorination tank is also connected with the top of the dechlorination tower through a pump body and a pipeline, and the top of the dechlorination tower is also connected with a chlorine recovery device, so as to form a trichloroisocyanuric acid mother liquid chlorine gas circulation recovery system, increase the acidity of the mother liquid, reduce the air volume of the blowing tower, reduce the air content in the blown chlorine gas, and produce a sodium monochloroisocyanate intermediate with the recovered chlorine gas, thereby ensuring recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is now further described with reference to the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the main structure of the utility model. DETAILED DESCRIPTION

[0014] like Figure 1 As shown, a trichloroisocyanuric acid mother liquor chlorine recovery system includes a mother liquor tank 1 and a hydrochloric acid tank 2. The mother liquor tank 1 is connected to the bottom of a dechlorination tank 3 through a pump body and a pipeline, and the hydrochloric acid tank 2 is connected to the top of a dechlorination tower 4 through a pump body and a pipeline. The bottom of the dechlorination tower 4 is connected to the top of the dechlorination tank 3. The dechlorination tank 3 is also connected to the top of the dechlorination tower 4 through a pump body and a pipeline. The top of the dechlorination tower 4 is also connected to a chlorine recovery device.

[0015] Specifically: there are multiple groups of dechlorination tanks 3 and dechlorination towers 4, and the pipes connecting the mother liquid tank 1, the hydrochloric acid tank 2, the dechlorination tank 3, and the dechlorination tower 4 are also provided with control valves 5. There are three groups of dechlorination tanks 3 and dechlorination towers 4, and the mother liquid tank 1 is connected to the first group of dechlorination tanks 3 through a pump body, a pipe and a control valve 5, the first group of dechlorination tanks 3 is connected to the second group of dechlorination tanks 3 through a pipe and a valve 6, and the second group of dechlorination tanks 3 is connected to the third group of dechlorination tanks 3 through a pipe and a valve 6.

[0016] In addition, the discharge end of the third group of dechlorination tanks 3 is also connected to a three-effect evaporator 7, the bottom of the third group of dechlorination towers 4 is connected to the air inlet end of the fan 8, and each group of dechlorination tanks 3 is connected to the corresponding dechlorination tower 4 through a circulation pump body 9 and a pipeline.

[0017] Working principle of the utility model: the utility model increases the acidity of the mother liquor, reduces the air volume of the blowing tower, reduces the air content in the blown chlorine gas, and recovers the chlorine gas to produce the sodium monochloroisocyanate intermediate, thereby ensuring recycling.

[0018] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A trichloroisocyanuric acid mother liquor chlorine recovery system, comprising a mother liquor tank (1) and a hydrochloric acid tank (2), characterized in that: The mother liquid tank (1) is connected to the bottom of the dechlorination tank (3) through a pump body and a pipeline, the hydrochloric acid tank (2) is connected to the top of the dechlorination tower (4) through a pump body and a pipeline, the bottom of the dechlorination tower (4) is connected to the top of the dechlorination tank (3), the dechlorination tank (3) is also connected to the top of the dechlorination tower (4) through a pump body and a pipeline, and the top of the dechlorination tower (4) is also connected to a chlorine recovery device.

2. A trichloroisocyanuric acid mother liquor chlorine recovery system as claimed in claim 1, characterized in that: The dechlorination tank (3) and the dechlorination tower (4) are provided in multiple groups, and the pipelines connecting the mother liquid tank (1), the hydrochloric acid tank (2), the dechlorination tank (3) and the dechlorination tower (4) are also provided with control valves (5) respectively.

3. A trichloroisocyanuric acid mother liquor chlorine recovery system as claimed in claim 2, characterized in that: The dechlorination tank (3) and the dechlorination tower (4) are provided in three groups, and the mother liquid tank (1) is connected to the first group of dechlorination tanks (3) through a pump body, a pipeline and a control valve (5), the first group of dechlorination tanks (3) is connected to the second group of dechlorination tanks (3) through a pipeline and a valve (6), and the second group of dechlorination tanks (3) is connected to the third group of dechlorination tanks (3) through a pipeline and a valve (6).

4. A trichloroisocyanuric acid mother liquor chlorine recovery system as claimed in claim 3, characterized in that: The discharge end of the third group of dechlorination tanks (3) is also connected to a triple-effect evaporation device (7).

5. A trichloroisocyanuric acid mother liquor chlorine recovery system as claimed in claim 3, characterized in that: The bottom of the third group of dechlorination towers (4) is connected to the air inlet end of the fan (8).

6. A trichloroisocyanuric acid mother liquor chlorine recovery system as claimed in claim 2, characterized in that: Each group of dechlorination tanks (3) is connected to a corresponding dechlorination tower (4) via a circulation pump body (9) and a pipeline.

Images