Thiocyanate mother liquor treatment system for enriching high molecular impurities

Abstract

The present invention provides a thiocyanate mother liquor treatment system enriched with polymer impurities, belonging to the technical field of chemical waste treatment, including a thiocyanate mother liquor storage tank, an ammonium-to-sodium reactor, a caustic soda storage tank, a condenser, a desulfurization device, a filter and a sodium thiocyanate storage tank, the thiocyanate mother liquor in the thiocyanate mother liquor storage tank can be transported to the ammonium-to-sodium reactor, the caustic soda storage tank transports caustic soda to the ammonium-to-sodium reactor, the gas phase after the heating reaction is recovered by the condenser ammonia water, the desulfurization device is used to desulfurize the ammonia water, the liquid phase after the heating reaction is filtered by the filter, and the filtered filtrate is used to be transported to the coal blending device, and the sodium thiocyanate storage tank is used to accommodate the liquid sodium thiocyanate product obtained after being filtered by the filter. The thiocyanate mother liquor treatment system enriched with polymer impurities provided by the present invention has good treatment effect on thiocyanate mother liquor, high product acquisition rate, less impurities, small amount of mother liquor waste and is conducive to recycling and reuse.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical waste treatment, and more specifically, relates to a thiocyanate mother liquor treatment system enriched with high molecular impurities. Background Art

[0002] In the field of chemical waste liquid treatment, the thiocyanate mother liquor enriched with high molecular weight impurities accumulated by the salt extraction device includes multiple components. The use of equipment in the prior art to re-treat the thiocyanate mother liquor has no obvious effect, low production efficiency, large amount of mother liquor waste, and more impurities obtained, resulting in a low product acquisition rate, which is not conducive to reuse. Summary of the invention

[0003] The object of the present invention is to provide a thiocyanate mother liquor treatment system for enriching high molecular impurities, aiming to solve the technical problems of poor treatment effect of thiocyanate mother liquor and low product acquisition rate using existing technical equipment.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a thiocyanate mother liquor treatment system for enriching high molecular impurities, including a thiocyanate mother liquor storage tank, an ammonium to sodium reactor, a caustic soda storage tank, a condenser, a desulfurization device, a filter and a sodium thiocyanate storage tank.

[0005] The thiocyanate mother liquor storage tank contains thiocyanate mother liquor enriched with high molecular impurities;

[0006] The ammonium-to-sodium reaction kettle is connected to the thiocyanate mother liquor storage tank, and the thiocyanate mother liquor in the thiocyanate mother liquor storage tank can be transported to the ammonium-to-sodium reaction kettle, and the ammonium-to-sodium reaction kettle is used for heating reaction;

[0007] The caustic soda storage tank contains caustic soda or liquid sodium hydroxide, is connected to the ammonium-to-sodium conversion reactor and can transport caustic soda into the ammonium-to-sodium conversion reactor;

[0008] The condenser is connected to the gas phase outlet of the ammonium-to-sodium conversion reactor, and the gas phase after the heating reaction is passed through the condenser to recover ammonia water;

[0009] The desulfurization device is in communication with the condenser and is used to receive the ammonia water output from the condenser and desulfurize the ammonia water;

[0010] The filter is connected to the liquid phase outlet of the ammonium-to-sodium reactor, the liquid phase after the heating reaction is filtered through the filter, and the filtered material is used to be transported to the coal blending device, and the coal blending device is used to blend the filtered material with coal;

[0011] The sodium thiocyanate storage tank is communicated with the filtering end of the filter and is used to contain the liquid sodium thiocyanate product obtained after being filtered by the filter.

[0012] In a possible implementation, the system for treating thiocyanate mother liquor enriched with high molecular weight impurities further includes an ammonia evaporation device, which is connected to the condenser and is used to receive ammonia water output from the condenser and evaporate ammonia from the ammonia water.

[0013] In a possible implementation, a three-way valve is provided at the output end of the condenser, the liquid inlet of the desulfurization device and the liquid inlet of the ammonia evaporation device are respectively connected to the two outlets on the three-way valve, and the liquid outlet of the condenser is connected to the inlet of the three-way valve. By controlling the opening and closing of the three-way valve, the ammonia water output by the condenser is controlled to flow into the desulfurization device or the ammonia evaporation device.

[0014] In a possible implementation, the thiocyanate mother liquor treatment system for enriching high molecular impurities also includes a first metering tank arranged between the thiocyanate mother liquor storage tank and the ammonium sodium conversion reactor, and the first metering tank is used to measure the input amount of the thiocyanate mother liquor into the ammonium sodium conversion reactor.

[0015] In a possible implementation, the thiocyanate mother liquor treatment system for enriching high molecular impurities also includes a second metering tank arranged between the caustic soda storage tank and the ammonium sodium conversion reactor, and the second metering tank is used to measure the input amount of caustic soda into the ammonium sodium conversion reactor.

[0016] In a possible implementation, the thiocyanate mother liquor storage tank and the ammonium to sodium reactor, the caustic soda storage tank and the ammonium to sodium reactor, the ammonium to sodium reactor and the condenser, the condenser and the desulfurization device, the ammonium to sodium reactor and the filter, and the filter and the sodium thiocyanate storage tank are connected by pipelines, and connecting parts for connection are provided at both ends of the pipelines.

[0017] In a possible implementation, valves are provided on the plurality of pipelines, and the valves are used to control the on-off of the pipelines.

[0018] In a possible implementation, instruments are provided on the plurality of pipelines, and the instruments include one or more of a pressure gauge, a temperature gauge, a flow meter, or a flow rate meter.

[0019] In a possible implementation, the condenser is an ammonia condenser.

[0020] In a possible implementation, the filter includes two filter pumps arranged in parallel with each other.

[0021] The beneficial effect of the thiocyanate mother liquor treatment system enriched with high molecular weight impurities provided by the present invention is that: compared with the prior art, the thiocyanate mother liquor treatment system enriched with high molecular weight impurities of the present invention comprises a thiocyanate mother liquor storage tank, an ammonium to sodium conversion reactor, a caustic soda storage tank, a condenser, a desulfurization device, a filter and a sodium thiocyanate storage tank, the thiocyanate mother liquor storage tank contains thiocyanate mother liquor enriched with high molecular weight impurities; the ammonium to sodium conversion reactor is connected to the thiocyanate mother liquor storage tank, the thiocyanate mother liquor in the thiocyanate mother liquor storage tank can be transported to the ammonium to sodium conversion reactor, and the ammonium to sodium conversion reactor is used for heating reaction; the caustic soda storage tank contains caustic soda or liquid sodium hydroxide, is connected to the ammonium to sodium conversion reactor and can transport caustic soda to the ammonium to sodium conversion reactor; the condenser is connected to the gas phase outlet of the ammonium to sodium conversion reactor, The gas phase after the heating reaction is passed through a condenser to recover ammonia water; the desulfurization device is connected with the condenser to receive the ammonia water output from the condenser and desulfurize the ammonia water; the filter is connected with the liquid phase outlet of the ammonium to sodium reactor, the liquid phase after the heating reaction is filtered through the filter, and the filtered filtrate is used to be transported to the coal blending device, and the coal blending device is used to blend the filtrate with coal; the sodium thiocyanate storage tank is connected with the filtering end of the filter to accommodate the liquid sodium thiocyanate product obtained after being filtered by the filter, which solves the technical problems of poor treatment effect of thiocyanate mother liquor and low product acquisition rate using existing technical equipment, and has the technical effects of good treatment effect of thiocyanate mother liquor, high product acquisition rate, less impurities, small waste of mother liquor and conducive to recycling and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of a thiocyanate mother liquor treatment system for enriching high molecular weight impurities provided in an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1. Thiocyanate mother liquor storage tank; 2. Ammonium to sodium reactor; 3. Caustic soda storage tank; 4. Condenser; 5. Desulfurization device; 6. Filter; 7. Sodium thiocyanate storage tank; 8. Ammonia evaporation device; 9. Three-way valve; 10. Pipeline; 11. Valve; 12. Instrument. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] See also Figure 1 The thiocyanate mother liquor treatment system for enriching high molecular weight impurities provided by the present invention is now described. The thiocyanate mother liquor treatment system for enriching high molecular weight impurities comprises a thiocyanate mother liquor storage tank 1, an ammonium to sodium conversion reactor 2, a caustic soda storage tank 3, a condenser 4, a desulfurization device 5, a filter 6 and a sodium thiocyanate storage tank 7.

[0028] The thiocyanate mother liquor storage tank 1 contains thiocyanate mother liquor enriched with high molecular impurities;

[0029] The ammonium-to-sodium reaction kettle 2 is connected to the thiocyanate mother liquor storage tank 1, and the thiocyanate mother liquor in the thiocyanate mother liquor storage tank 1 can be transported to the ammonium-to-sodium reaction kettle 2, and the ammonium-to-sodium reaction kettle 2 is used for heating reaction;

[0030] The caustic soda storage tank 3 contains caustic soda or liquid sodium hydroxide, is connected to the ammonium-to-sodium conversion reactor 2, and can transport caustic soda into the ammonium-to-sodium conversion reactor 2;

[0031] The condenser 4 is connected to the gas phase outlet of the ammonium-to-sodium conversion reactor 2, and the gas phase after the heating reaction is recovered through the condenser 4 to recover the ammonia water;

[0032] The desulfurization device 5 is connected to the condenser 4 and is used to receive the ammonia water output from the condenser 4 and desulfurize the ammonia water;

[0033] The filter 6 is connected to the liquid phase outlet of the ammonium-to-sodium reactor 2, and the liquid phase after the heating reaction is filtered through the filter 6, and the filtered filtrate is used to be transported to the coal blending device, and the coal blending device is used to blend the filtrate with coal;

[0034] The sodium thiocyanate storage tank 7 is connected to the filtering end of the filter 6 and is used to contain the liquid sodium thiocyanate product obtained after being filtered by the filter 6 .

[0035] The present invention provides a thiocyanate mother liquor processing system for enriching high molecular weight impurities. Compared with the prior art, the present invention comprises a thiocyanate mother liquor processing system for enriching high molecular weight impurities, a thiocyanate mother liquor storage tank 1, an ammonium to sodium conversion reaction kettle 2, a caustic soda storage tank 3, a condenser 4, a desulfurization device 5, a filter 6 and a sodium thiocyanate storage tank 7. The thiocyanate mother liquor storage tank 1 contains thiocyanate mother liquor enriched with high molecular weight impurities; the ammonium to sodium conversion reaction kettle 2 is connected to the thiocyanate mother liquor storage tank 1, and the thiocyanate mother liquor in the thiocyanate mother liquor storage tank 1 can be transported to the ammonium to sodium conversion reaction kettle 2, and the ammonium to sodium conversion reaction kettle 2 is used for heating reaction; the caustic soda storage tank 3 contains caustic soda or liquid sodium hydroxide, is connected to the ammonium to sodium conversion reaction kettle 2 and can transport caustic soda to the ammonium to sodium conversion reaction kettle 2; the condenser 4 is connected to the gas phase outlet of the ammonium to sodium conversion reaction kettle 2, The gas phase after the heating reaction is passed through the condenser 4 to recover the ammonia water; the desulfurization device 5 is connected with the condenser 4, and is used to receive the ammonia water output from the condenser 4 and desulfurize the ammonia water; the filter 6 is connected with the liquid phase outlet of the ammonium-to-sodium reactor 2, and the liquid phase after the heating reaction is filtered through the filter 6, and the filtered filtrate is used to be transported to the coal blending device, and the coal blending device is used to blend the filtrate with coal; the sodium thiocyanate storage tank 7 is connected with the filtering end of the filter 6, and is used to accommodate the liquid sodium thiocyanate product obtained after being filtered by the filter 6, which solves the technical problems of poor treatment effect of thiocyanate mother liquor and low product acquisition rate using existing technical equipment, and has the technical effects of good treatment effect of thiocyanate mother liquor, high product acquisition rate, less impurities, small waste of mother liquor and conducive to recycling and reuse.

[0036] In some embodiments, see Figure 1 The system for treating thiocyanate mother liquor enriched with high molecular weight impurities further comprises an ammonia evaporation device 8, which is connected to the condenser 4 and is used to receive the ammonia water output from the condenser 4 and evaporate ammonia from the ammonia water. The ammonia evaporation device 8 adopts a product of the prior art and can evaporate ammonia from the ammonia water, wherein the ammonia evaporation device 8 can adopt an ammonia evaporation tower or the like.

[0037] In some embodiments, see Figure 1 A three-way valve 9 is provided at the output end of the condenser 4. The liquid inlet of the desulfurization device 5 and the liquid inlet of the ammonia evaporation device 8 are respectively connected to the two outlets on the three-way valve 9. The liquid outlet of the condenser 4 is connected to the inlet of the three-way valve 9. By controlling the opening and closing of the three-way valve 9, the ammonia water output by the condenser 4 is controlled to flow into the desulfurization device 5 or the ammonia evaporation device 8.

[0038] In some embodiments, see Figure 1 The thiocyanate mother liquor treatment system for enriching high molecular impurities also includes a first metering tank arranged between the thiocyanate mother liquor storage tank 1 and the ammonium sodium conversion reactor 2, and the first metering tank is used to measure the input amount of the thiocyanate mother liquor into the ammonium sodium conversion reactor 2.

[0039] In some embodiments, see Figure 1The thiocyanate mother liquor treatment system for enriching high molecular impurities also includes a second metering tank arranged between the caustic soda storage tank 3 and the ammonium sodium conversion reactor 2, and the second metering tank is used to measure the input amount of caustic soda into the ammonium sodium conversion reactor 2.

[0040] The above-mentioned first metering tank and second metering tank are not shown in the figure. The products in the prior art can be used. After the materials are weighed or measured, they are added to the ammonium to sodium reactor 2 in proportion to obtain a product with a higher yield. The matching proportion relationship has been set before the operation of this system. It is only necessary to add a certain amount of thiocyanate mother liquor and caustic soda to the ammonium to sodium reactor 2. Through the heating reaction of the ammonium to sodium reactor 2, the expected technical effect can be obtained.

[0041] In some embodiments, see Figure 1 The thiocyanate mother liquor storage tank 1 and the ammonium to sodium reactor 2, the caustic soda storage tank 3 and the ammonium to sodium reactor 2, the ammonium to sodium reactor 2 and the condenser 4, the condenser 4 and the desulfurization device 5, the ammonium to sodium reactor 2 and the filter 6, and the filter 6 and the sodium thiocyanate storage tank 7 are connected through pipelines 10, and connecting parts for connection are provided at both ends of the pipeline 10. The connecting part is a connecting end that can be connected to the liquid inlet and liquid outlet of the above-mentioned components. A sealing member (such as a sealing ring) is provided on the connecting part. When connected to the upper component, a sealed connection can be ensured and a proper sealing effect can be achieved.

[0042] In some embodiments, see Figure 1 , valves 11 are provided on the plurality of pipelines 10, and the valves 11 are used to control the on and off of the pipelines 10. The valves 11 installed on the pipelines 10 can be selected according to the actual situation, such as a one-way valve, a check valve, a solenoid valve, a flow valve or a pressure valve, etc., and can be selected and installed on the pipelines 10 at appropriate positions according to the actual situation, so as to control the operation of the pipelines 10.

[0043] In some embodiments, see Figure 1 , instruments 12 are provided on the plurality of pipelines 10, and the instruments 12 include one or more of a pressure gauge, a temperature gauge, a flow meter, or a velocity meter. By installing the instruments 12 on the pipelines 10, the style or function of the instruments 12 can be selected according to actual needs. By selecting a suitable instrument 12 and installing it on the pipeline 10 at a suitable position, the operation status of the pipeline 10 can be monitored in real time, so that the staff can make reasonable adjustments to the present invention later.

[0044] In some embodiments, see Figure 1 The condenser 4 is an ammonia condenser 4. The ammonia condenser 4 can be an ammonia condenser 4 in the prior art, which has a good effect and can meet the normal use of the present invention.

[0045] In some embodiments, see Figure 1 The filter 6 includes two filter pumps arranged in parallel. One filter pump is for normal use, and the other filter pump is for standby use. The connection method and structure of the two water pumps are the same. The present invention also includes a control panel that is electrically connected to the two filter pumps and controls the operation respectively. The two filter pumps can be switched through the control panel. When one filter pump fails, the other filter pump can be switched normally and put into use. At the same time, an alarm is electrically connected to the control panel. When a failure occurs, the alarm sends an alarm signal. The alarm is an audible and visual alarm.

[0046] In the embodiment of the present invention, in addition to filtering with a filter pump, a filter net or a filter screen can also be used for filtering, and the specific selection method of the filter 6 can be determined according to actual conditions.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for treating thiocyanate mother liquor for enriching high molecular weight impurities, characterized in that: include: A thiocyanate mother liquor storage tank, containing thiocyanate mother liquor enriched with high molecular weight impurities; An ammonium-to-sodium conversion reactor is connected to the thiocyanate mother liquor storage tank, and the thiocyanate mother liquor in the thiocyanate mother liquor storage tank can be transported to the ammonium-to-sodium conversion reactor, and the ammonium-to-sodium conversion reactor is used for heating reaction; a caustic soda storage tank containing caustic soda, connected to the ammonium-to-sodium conversion reactor and capable of conveying caustic soda into the ammonium-to-sodium conversion reactor; A condenser is connected to the gas phase outlet of the ammonium-to-sodium reaction kettle, and the gas phase after the heating reaction is passed through the condenser to recover ammonia water; a desulfurization device, connected to the condenser, for receiving the ammonia water output from the condenser and desulfurizing the ammonia water; A filter is connected to the liquid phase outlet of the ammonium-to-sodium reactor, and the liquid phase after the heating reaction is filtered through the filter, and the filtered material is used to be transported to the coal blending device, and the coal blending device is used to blend the filtered material with coal; as well as a sodium thiocyanate storage tank, connected to the filtering end of the filter, for containing the liquid sodium thiocyanate product obtained after being filtered by the filter; It also includes an ammonia evaporation device, which is in communication with the condenser and is used to receive the ammonia water output from the condenser and evaporate ammonia from the ammonia water; The filter comprises two filter pumps arranged in parallel with each other, the filter pumps are electrically connected to a control panel, and the control panel is used to control the switching operation of the two filter pumps; A three-way valve is provided at the output end of the condenser, and the liquid inlet of the desulfurization device and the liquid inlet of the ammonia evaporation device are respectively connected to the two outlets on the three-way valve, and the liquid outlet of the condenser is connected to the inlet of the three-way valve. By controlling the opening and closing of the three-way valve, the ammonia water output by the condenser is controlled to flow into the desulfurization device or the ammonia evaporation device.

2. The system for treating thiocyanate mother liquor for enriching high molecular weight impurities according to claim 1, characterized in that: The thiocyanate mother liquor treatment system for enriching high molecular impurities also includes a first metering tank arranged between the thiocyanate mother liquor storage tank and the ammonium to sodium conversion reactor, and the first metering tank is used to measure the input amount of the thiocyanate mother liquor into the ammonium to sodium conversion reactor.

3. The system for treating thiocyanate mother liquor for enriching high molecular weight impurities according to claim 1, characterized in that: The thiocyanate mother liquor treatment system for enriching high molecular impurities also includes a second metering tank arranged between the caustic soda storage tank and the ammonium sodium conversion reactor, and the second metering tank is used to measure the input amount of caustic soda into the ammonium sodium conversion reactor.

4. The system for treating thiocyanate mother liquor for enriching high molecular weight impurities according to claim 1, characterized in that: The thiocyanate mother liquor storage tank and the ammonium to sodium reactor, the caustic soda storage tank and the ammonium to sodium reactor, the ammonium to sodium reactor and the condenser, the condenser and the desulfurization device, the ammonium to sodium reactor and the filter, and the filter and the sodium thiocyanate storage tank are connected by pipelines, and connecting parts for connection are provided at both ends of the pipelines.

5. The system for treating thiocyanate mother liquor for enriching high molecular weight impurities according to claim 4, characterized in that: Valves are provided on the plurality of pipelines, and the valves are used to control the on-off of the pipelines.

6. The system for treating thiocyanate mother liquor for enriching high molecular weight impurities according to claim 5, characterized in that: Instruments are arranged on the plurality of pipelines, and the instruments include one or more of a pressure gauge, a temperature gauge, a flow meter, or a flow velocity meter.

7. The system for treating thiocyanate mother liquor for enriching high molecular weight impurities according to claim 1, characterized in that: The condenser is an ammonia condenser.

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