CN202844602U - Microwave-heating device for waste acid regeneration - Google Patents

Abstract

The utility model provides a microwave-heating device for waste acid regeneration, and the microwave-heating device comprises a waste acid storage tank, a circulating pump, a microwave heating device, an evaporator, a condensing device, a regenerated acid tank and a vacuum pump, wherein the waste acid storage tank is connected with the inlet of the microwave heating device through an anti-corrosion connecting pipe and the circulating pump; the outlet of the microwave heating device is connected with the evaporator; the side outlet of the evaporator is connected with the waste acid storage tank through a pipeline; the top outlet of the evaporator is connected with the inlet of the condensing device; the outlet of the condensing device is connected with the regenerated acid tank; and the vacuum pump is connected with the regenerated acid tank. The microwave-heating device provided by the utility model has the advantages of high heating speed, fast starting and stopping, easiness for control, convenience for operation, less production equipment, simple structure, convenience for installation, no heat exchange link, high energy utilization ratio and heating efficiency, safety, environment friendliness, cleanness, production without pollution, greatly reduced production cost and increased working efficiency and can be used for heating the spent acid solution under the condition of circulation.

Description

A microwave heating device for waste acid regeneration

technical field

The utility model relates to a microwave heating device for regenerating waste acid, which is mainly used for regeneration treatment of metal material pickling liquid and waste acid liquid produced in metal smelting process, and belongs to the technical field of microwave energy application.

Background technique

Volatile inorganic strong acids are widely used in modern industry. If the waste acid produced is directly discharged, it will lead to waste of resources and environmental pollution. At present, most enterprises use graphite heat exchanger as the regeneration process of the main device. The specific process is as follows: through The boiler produces high-temperature steam, and the graphite heat exchanger is used to transfer the heat of the high-temperature steam to the waste acid liquid, and the waste acid liquid is heated to boiling and continuously evaporates to recover the valuable acid. However, in the production process, there are many problems in the graphite heat exchanger device, which are as follows: 1. The impact resistance of graphite in the graphite heat exchanger is low, so it is easy to be damaged during transportation, installation and specific operations, and it needs frequent Maintenance; 2. There is a small amount of salt dissolved in the acid solution. When the waste acid solution evaporates to a certain volume, it will crystallize and precipitate, thereby blocking the pores of the graphite heat exchanger during the heating cycle and reducing the heat exchange efficiency. In severe cases It hinders the smooth progress of production and brings hidden dangers to safe production; 3. High-temperature steam is generated by the waste heat boiler, and after pipeline transmission, heat is exchanged to the waste acid liquid through a graphite heat exchanger. After multiple heat transfers, the heat utilization rate is very low , resulting in high production costs and a great waste of energy, heat loss is greater.

Utility model content

In order to solve the above problems, the utility model provides a microwave heating device for waste acid regeneration, which can directly heat waste acid liquid to recover valuable acid, without heat exchange process, and the diameter of the pipeline in the device is relatively large, avoiding It solves the problem of intermittent operation and hidden dangers of production safety caused by the blockage of similar graphite heat exchangers by crystallization, and also solves the problems of heat exchange efficiency and production cost in the existing process, and realizes safe production and resource recycling.

The technical solution adopted by the utility model to solve the technical problem is: a microwave heating device for waste acid regeneration, including a waste acid storage tank 9, a circulation pump 10, a microwave heater 14, an evaporator 15, a condensation device 16, and a regeneration acid tank 17. Vacuum pump 18, the waste acid storage tank 9 is connected to the inlet 1 of the microwave heater 14 and the circulation pump 10 through a corrosion-resistant connecting pipe, the outlet 7 of the microwave heater 14 is connected to the evaporator 15, and the side outlet of the evaporator 15 is It is connected to the waste acid storage tank 9 through pipelines, the top outlet of the evaporator 15 is connected to the inlet of the condensing device 16 , the outlet of the condensing device 16 is connected to the regeneration acid tank 17 , and the vacuum pump 18 is connected to the regeneration acid tank 9 .

The microwave heater 14 includes an inlet 1, a regular cleaning liquid discharge port 2, a heating container 3, a support 4, a microwave generator 5, a microwave cavity 6, and an outlet 7, and the heating container 3 and the microwave generator 5 are arranged in the microwave cavity In 6, an inlet 1 and an outlet 7 are arranged at both ends of the heating container 3, a regular cleaning liquid discharge outlet 2 is arranged at the inlet 1, and a bracket 4 is arranged under the microwave cavity 6.

The microwave heating device for waste acid regeneration also includes a microwave control system 20, which is composed of an automatic control circuit and a temperature sensor 13, and the temperature sensor 13 is distributed at the inlet and outlet of the microwave heater 14.

The microwave heating device for waste acid regeneration also includes a flow control system for waste acid liquid, which is composed of a flow meter 12 and a flow control valve 11 , and is arranged between the inlet 1 of the microwave heater 14 and the circulating pump 10 .

The microwave heating device for waste acid regeneration also includes a waste acid storage tank drain valve 8 and a regeneration acid tank drain valve 19, which are respectively arranged on the waste acid storage tank 9 and the regeneration acid tank 17.

The waste acid storage tank 9, heating container 3, evaporator 15, and regeneration acid tank 17 are all made of high performance polypropylene (PPH).

The circulation pump 10 adopts a steel-lined polytetrafluoroethylene-lined centrifugal acid-resistant pump.

The flowmeter 12 is a polytetrafluoroethylene flanged rotameter with two ends.

The inner wall of the microwave cavity 6 is made of stainless steel.

The condensing device 16 is a coil glass cooler.

The diameter of the inlet and outlet of the heating container 3 is 3-18 cm; it can also be adjusted appropriately according to the capacity. Increasing the caliber can avoid the occurrence of crystallization during the evaporation process and block the pipeline, and avoid the problems of intermittent operation and safety production hazards caused by the small pore size of graphite heat exchangers that are easily blocked by crystallization during the production process.

The working principle of the device is: the waste acid liquid in the waste acid storage tank is transported to the heating container in the microwave cavity through the PTFE acid-resistant pump, and the waste acid liquid absorbs microwave energy after flowing through the heating container, and the temperature is raised. The spent acid is heated in continuous circulation until it boils. Using the principle of microwave heating, mainly using the effect of microwaves on polar molecules, the waste acid liquid is heated to the boiling point and maintained in a boiling state. After boiling, the gas-liquid phase is separated in the evaporator, and the liquid is circulated back to the waste acid storage tank through the pipeline. , the acid gas flows through the condensing device under the action of negative pressure, and the regenerated acid is obtained after condensation. The automatic control circuit controls the number of microwave heaters, that is, the microwave heating power, according to the output signal of the temperature sensor, and the flow of waste acid is controlled by a valve.

The remarkable effect of the utility model is mainly manifested in: the microwave heating equipment is adopted, the heating speed is fast, it can be started and stopped quickly, it is easy to control, the operation is convenient, and the waste acid can be heated under the circulation condition; there is no boiler and graphite heat exchanger , less production equipment, simple structure, easy installation; no heat exchange link, high energy utilization and heating efficiency, safe, environmentally friendly, clean production and no pollution, greatly reducing production costs and improving work efficiency. The device can be widely used in the production process of recycling and reusing waste acid produced in the pickling or pickling process in the metallurgical industry, and can be used in the recovery of waste acid, concentration of solution and Chinese herbal medicine extract, etc.

Description of drawings

Fig. 1 is the structural representation of the microwave heating device of waste acid regeneration;

Fig. 2 is the structural representation of microwave heater;

Fig. 3 is the structural representation of heating vessel;

In the figure, inlet-1, regular cleaning liquid discharge port-2, heating container-3, bracket-4, microwave generator-5, microwave cavity-6, outlet-7, waste acid storage tank drain valve-8, Waste acid storage tank-9, circulating pump-10, flow control valve-11, flow meter-12, temperature sensor-13, microwave heater-14, evaporator-15, condensing device-16, regeneration acid tank-17, Vacuum pump-18, regeneration acid tank drain valve-19, microwave control system-20.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

As shown in Figures 1 to 3, the microwave heating device for waste acid regeneration includes a waste acid storage tank 9, a circulation pump 10, a microwave heater 14, an evaporator 15, a condensation device 16, a regeneration acid tank 17, and a vacuum pump 18. The inlet 1 of the tank 9 and the microwave heater 14 is connected with the circulating pump 10 through a corrosion-resistant connecting pipe, the outlet 7 of the microwave heater 14 is connected with the evaporator 15, and the side outlet of the evaporator 15 is connected with the waste acid storage tank 9 through a pipeline, The top outlet of the evaporator 15 is connected to the inlet of the condensing device 16 , the outlet of the condensing device 16 is connected to the regeneration acid tank 17 , and the vacuum pump 18 is connected to the regeneration acid tank 9 . The microwave heater 14 includes an inlet 1, a regular cleaning liquid discharge port 2, a heating container 3, a support 4, a microwave generator 5, a microwave cavity 6, and an outlet 7, and the heating container 3 and the microwave generator 5 are arranged in the microwave cavity 6 , the two ends of the heating container 3 are provided with an inlet 1 and an outlet 7, the regular cleaning liquid discharge port 2 is arranged at the inlet 1, and the bracket 4 is arranged under the microwave cavity 6 . The microwave heating device for waste acid regeneration also includes a microwave control system 20, which is composed of an automatic control circuit and a temperature sensor 13, and the temperature sensor 13 is distributed at the inlet and outlet of the microwave heater 14. It may also include a waste acid flow control system, which is composed of a flow meter 12 and a flow control valve 11 , and is arranged between the inlet 1 of the microwave heater 14 and the circulation pump 10 . In addition, the device also includes a waste acid storage tank drain valve 8 and a regeneration acid tank drain valve 19, which are respectively arranged on the waste acid storage tank 9 and the regeneration acid tank 17.

Among them, the diameter of the inlet and outlet of the heating container 3 is 3 cm; and the waste acid storage tank 9, the heating container 3, the evaporator 15, and the regeneration acid tank 17 are all made of high-performance polypropylene (PPH). The circulating pump 10 adopts a steel-lined polytetrafluoroethylene-lined centrifugal acid-resistant pump. The flowmeter 12 is a polytetrafluoroethylene flanged rotameter with both ends. The inner wall of the microwave cavity 6 is made of stainless steel. The condensing device 16 is a coil glass cooler.

Example 2

As shown in Figures 1 to 3, the microwave heating device for waste acid regeneration includes a waste acid storage tank 9, a circulation pump 10, a microwave heater 14, an evaporator 15, a condensation device 16, a regeneration acid tank 17, and a vacuum pump 18. The inlet 1 of the tank 9 and the microwave heater 14 is connected with the circulating pump 10 through a corrosion-resistant connecting pipe, the outlet 7 of the microwave heater 14 is connected with the evaporator 15, and the side outlet of the evaporator 15 is connected with the waste acid storage tank 9 through a pipeline, The top outlet of the evaporator 15 is connected to the inlet of the condensing device 16 , the outlet of the condensing device 16 is connected to the regeneration acid tank 17 , and the vacuum pump 18 is connected to the regeneration acid tank 9 . The microwave heater 14 includes an inlet 1, a regular cleaning liquid discharge port 2, a heating container 3, a support 4, a microwave generator 5, a microwave cavity 6, and an outlet 7, and the heating container 3 and the microwave generator 5 are arranged in the microwave cavity 6 , the two ends of the heating container 3 are provided with an inlet 1 and an outlet 7, the regular cleaning liquid discharge port 2 is arranged at the inlet 1, and the bracket 4 is arranged under the microwave cavity 6 . The microwave heating device for waste acid regeneration also includes a microwave control system 20, which is composed of an automatic control circuit and a temperature sensor 13, and the temperature sensor 13 is distributed at the inlet and outlet of the microwave heater 14. It may also include a waste acid flow control system, which is composed of a flow meter 12 and a flow control valve 11 , and is arranged between the inlet 1 of the microwave heater 14 and the circulation pump 10 . In addition, the device also includes a waste acid storage tank drain valve 8 and a regeneration acid tank drain valve 19, which are respectively arranged on the waste acid storage tank 9 and the regeneration acid tank 17.

Among them, the diameter of the inlet and outlet of the heating container 3 is 18 cm; and the waste acid storage tank 9, the heating container 3, the evaporator 15, and the regeneration acid tank 17 are all made of high-performance polypropylene (PPH). The circulating pump 10 adopts a steel-lined polytetrafluoroethylene-lined centrifugal acid-resistant pump. The flowmeter 12 is a polytetrafluoroethylene flanged rotameter with both ends. The inner wall of the microwave cavity 6 is made of stainless steel. The condensing device 16 is a coil glass cooler.

Example 3

As shown in Figures 1 to 3, the microwave heating device for waste acid regeneration includes a waste acid storage tank 9, a circulation pump 10, a microwave heater 14, an evaporator 15, a condensation device 16, a regeneration acid tank 17, and a vacuum pump 18. The inlet 1 of the tank 9 and the microwave heater 14 is connected with the circulating pump 10 through a corrosion-resistant connecting pipe, the outlet 7 of the microwave heater 14 is connected with the evaporator 15, and the side outlet of the evaporator 15 is connected with the waste acid storage tank 9 through a pipeline, The top outlet of the evaporator 15 is connected to the inlet of the condensing device 16 , the outlet of the condensing device 16 is connected to the regeneration acid tank 17 , and the vacuum pump 18 is connected to the regeneration acid tank 9 . The microwave heater 14 includes an inlet 1, a regular cleaning liquid discharge port 2, a heating container 3, a support 4, a microwave generator 5, a microwave cavity 6, and an outlet 7, and the heating container 3 and the microwave generator 5 are arranged in the microwave cavity 6 , the two ends of the heating container 3 are provided with an inlet 1 and an outlet 7, the regular cleaning liquid discharge port 2 is arranged at the inlet 1, and the bracket 4 is arranged under the microwave cavity 6 . The microwave heating device for waste acid regeneration also includes a microwave control system 20, which is composed of an automatic control circuit and a temperature sensor 13, and the temperature sensor 13 is distributed at the inlet and outlet of the microwave heater 14. It may also include a waste acid flow control system, which is composed of a flow meter 12 and a flow control valve 11 , and is arranged between the inlet 1 of the microwave heater 14 and the circulation pump 10 . In addition, the device also includes a waste acid storage tank drain valve 8 and a regeneration acid tank drain valve 19, which are respectively arranged on the waste acid storage tank 9 and the regeneration acid tank 17.

Among them, the diameter of the inlet and outlet of the heating container 3 is 12 cm; and the waste acid storage tank 9, the heating container 3, the evaporator 15, and the regeneration acid tank 17 are all made of high-performance polypropylene (PPH). The circulating pump 10 adopts a steel-lined polytetrafluoroethylene-lined centrifugal acid-resistant pump. The flowmeter 12 is a polytetrafluoroethylene flanged rotameter with both ends. The inner wall of the microwave cavity 6 is made of stainless steel. The condensing device 16 is a coil glass cooler.

Claims (10)

1. the microwave heating equipment of an acid regeneration, it is characterized in that: comprise spent acid storage tank (9), circulating pump (10), microwave applicator (14), evaporimeter (15), condensing unit (16), regenerated acid tank (17), vavuum pump (18), described spent acid storage tank (9) is connected with circulating pump (10) by corrosion-resistant tube connector with the import (1) of microwave applicator (14), the outlet (7) of microwave applicator (14) is connected with evaporimeter (15), the side outlet of evaporimeter (15) is connected with spent acid storage tank (9) by pipeline, the top outlet of evaporimeter (15) is connected with the import of condensing unit (16), the outlet of condensing unit (16) is connected with regenerated acid tank (17), and vavuum pump (18) links to each other with regenerated acid tank (9).

2. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: described microwave applicator (14) comprises import (1), periodic cleaning liquid floss hole (2), heating container (3), support (4), microwave generator (5), microwave cavity (6), outlet (7), heating container (3) and microwave generator (5) are arranged in the microwave cavity (6), heating container (3) two ends arrange import (1) and outlet (7), periodic cleaning liquid floss hole (2) is arranged on import (1) and locates, and support (4) is set under the microwave cavity (6).

3. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: the microwave heating equipment of described acid regeneration also comprises microwave control system (20), be comprised of automatic control circuit and temperature sensor (13), temperature sensor (13) is distributed in entrance point and the port of export of microwave applicator (14).

4. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: the microwave heating equipment of described acid regeneration also comprises the acid pickle flow control system, formed by flowmeter (12) and flow control valve (11), be arranged between the import (1) and circulating pump (10) of microwave applicator (14).

5. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: the microwave heating equipment of described acid regeneration also comprises spent acid storage tank tapping valve (8), regenerated acid tank tapping valve (19), is separately positioned on spent acid storage tank (9) and the regenerated acid tank (17).

6. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: described spent acid storage tank (9), heating container (3), evaporimeter (15) and regenerated acid tank (17) all select high-performance polypropylene (PPH) material to make; The inwall of microwave cavity (6) adopts the stainless steel manufacturing.

7. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: described circulating pump (10) adopts the centrifugal acid-proof pump of steel lining teflon lined.

8. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: described flowmeter (12) is two ends polytetrafluoroethylene (PTFE) flange form spinner flowmeter.

9. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: described condensing unit (16) is coiled glass cools device.

10. the microwave heating equipment of described acid regeneration according to claim 1 and 2, it is characterized in that: it is 3～18cm that described heating container (3) is imported and exported bore.

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