Waste sulfuric acid distillation and purification device

Abstract

The utility model belongs to the field of waste sulfuric acid treatment, and discloses a waste sulfuric acid distillation and purification device which comprises an inner box assembly for containing waste sulfuric acid for heating, and a box cover assembly which is arranged at the top of the inner box assembly and is used for guiding water vapor and acid vapor to be shunted, an outer box assembly for switching distillation states of inlet and outlet water is mounted on the periphery of the inner box assembly; the box cover assembly comprises a steam guide mechanism used for gathering steam and dividing the steam, a liquid inlet pipe is arranged on the steam guide mechanism, and a liquid inlet valve is installed on the liquid inlet pipe. The outer box assembly comprises an outer box cylinder, a water inlet and outlet mechanism is arranged on one side of the outer box cylinder, and a pressure release valve is arranged on the side, away from the water inlet and outlet mechanism, of the outer box cylinder. According to the waste sulfuric acid distillation and purification device disclosed by the utility model, the boiling point of the purified water in the outer box is raised by injecting the purified water into the outer box assembly and controlling the pressure by utilizing the pressure release valve, and the water in the waste sulfuric acid in the inner box is kept at a normal-pressure boiling point and is evaporated preferentially; and after drainage, the acid purification stage is switched, so that staged automatic purification is realized, and the energy efficiency ratio is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to waste sulfuric acid processing field, especially, relate to a waste sulfuric acid distillation purification device. BACKGROUND

[0002] Waste sulfuric acid distillation purification is an effective method for treating and recycling waste sulfuric acid generated in industrial processes. This method not only reduces environmental pollution, but also recycles valuable sulfuric acid, reducing production costs. Waste sulfuric acid usually contains various impurities such as organic matter, metal ions and other inorganic salts, which will affect the purity and use effect of sulfuric acid. Through distillation purification, these impurities can be effectively removed to obtain high-purity sulfuric acid.

[0003] The Chinese patent with publication number CN221544253U discloses a waste sulfuric acid distillation purification device, which includes a distillation assembly and a liquid storage tank. The distillation assembly is installed with a drain pipe at the top, and the drain pipe is connected and fixed with the liquid storage tank at the bottom. The liquid storage tank is fixedly connected with a curved gas return pipe on both sides. The inner wall of the gas return pipe is provided with a fixed frame, and the circumferential outer wall of the fixed frame is fixedly connected with a support plate. The end of the support plate is connected and fixed with the inner wall of the gas return pipe. The bottom of the fixed frame is fixedly connected with a motor, and the output end of the motor is connected with the fixed frame. After the waste sulfuric acid is heated, the turbine is driven to rotate by the two motors, which can make the steam in the connecting sleeve flow quickly into the liquid storage tank through the drain pipe, and part of the steam entering the gas return pipe will flow into the liquid storage tank through the lower end. This design can improve the steam flow speed.

[0004] However, the above-mentioned patent needs to treat the water in the waste sulfuric acid first before distillation and purification of sulfuric acid, which not only increases the complexity of operation and reduces the convenience of operation, but also easily dissipates a large amount of heat energy, greatly reducing the energy efficiency ratio. Therefore, a new device needs to be designed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a waste sulfuric acid distillation purification device to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A waste sulfuric acid distillation purification device, comprising an inner tank assembly for containing waste sulfuric acid heating, further comprising a tank cover assembly installed on the top of the inner tank assembly for guiding the diversion of water vapor and acid vapor, and an outer tank assembly installed on the outer periphery of the inner tank assembly for switching the distillation state of water in and out; the tank cover assembly comprises a gas guide mechanism for converging steam and diversion, the gas guide mechanism is provided with a liquid inlet pipe, and the liquid inlet pipe is provided with a liquid inlet valve; the outer tank assembly comprises an outer tank cylinder, one side of the outer tank cylinder is provided with a water inlet and outlet mechanism, and the side of the outer tank cylinder away from the water inlet and outlet mechanism is provided with a pressure relief valve.

[0008] Further, the inner tank assembly comprises an inner tank cylinder, a heating plate is installed on the bottom surface of the inner tank cylinder, a waste discharge pipe is installed on one side of the bottom of the inner tank cylinder, and a waste discharge valve is installed on the waste discharge pipe.

[0009] Further, the inner tank cylinder is provided with a connecting flange around the circumference, the connecting flange is arranged at one fourth of the top end of the inner tank cylinder, and a sealing gasket is attached to the bottom surface of the connecting flange.

[0010] Further, the gas guide mechanism comprises a gas guide cover, the bottom circumference of the gas guide cover is provided with a connecting rim, the top end of the gas guide cover is provided with a gas guide pipe, and a tee pipe is installed at the gas outlet end of the gas guide pipe.

[0011] Further, the gas guide cover is trumpet-shaped, and the gas guide pipe is inclined downward at an angle of 10 degrees with the horizontal.

[0012] Further, the water inlet and outlet mechanism comprises a water inlet pipe arranged on the top of the outer tank cylinder and a water outlet pipe arranged on the bottom of the outer tank cylinder, a water inlet pipe is installed on the water inlet pipe, and a water outlet valve is installed on the water outlet pipe.

[0013] Further, a plurality of support legs are uniformly distributed on the bottom surface of the outer tank cylinder, and a liquid level window is arranged on the front surface of the outer tank cylinder.

[0014] Compared with the prior art, the beneficial effects are:

[0015] 1. The outer tank assembly injects clean water and controls the pressure by using the pressure relief valve, so that the boiling point of the clean water in the outer tank is raised, while the water in the waste sulfuric acid in the inner tank maintains the normal pressure boiling point, and the water is preferentially evaporated; after draining, the acid purification stage is switched to realize automatic purification in stages, and the energy efficiency ratio is significantly improved;

[0016] 2. By dynamically adjusting the boiling point through pressure difference, combined with the design of the diversion type condenser, the problems of high energy consumption and incomplete separation in waste sulfuric acid purification are solved, and the device has the advantages of high efficiency, safety and convenient operation;

[0017] 3. Through the horn-shaped air guide cover and the inclined air guide pipe design, directional convergence and diversion of water vapor and acid vapor are realized, combined with the three-way pipe time period switching condensing equipment, efficient separation and independent collection of the two vapors are ensured, and cross contamination is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the waste sulfuric acid distillation purification device of the utility model;

[0019] Figure 2 is an appearance view of the waste sulfuric acid distillation purification device of the utility model;

[0020] Figure 3 is an inner box assembly schematic view of the waste sulfuric acid distillation purification device of the utility model;

[0021] Figure 4 is a front perspective view of the inner box assembly of the waste sulfuric acid distillation purification device of the utility model;

[0022] Figure 5 is a box cover assembly schematic view of the waste sulfuric acid distillation purification device of the utility model;

[0023] Figure 6 is an outer box assembly schematic view of the waste sulfuric acid distillation purification device of the utility model.

[0024] In the figure, 101, inner box cylinder; 102, heating plate; 103, waste pipe; 104, waste valve; 105, connecting flange; 106, sealing gasket; 201, air guide cover; 202, connecting edge; 203, air guide pipe; 204, liquid inlet pipe; 205, liquid inlet valve; 206, three-way pipe; 301, outer box cylinder; 302, support leg; 303, liquid level window; 304, water inlet pipe; 305, water inlet valve; 306, water outlet pipe; 307, water outlet valve; 308, pressure relief valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Please refer to Figures 1-6 A waste sulfuric acid distillation purification device, comprising an inner box assembly for containing waste sulfuric acid for heating, further comprising a box cover assembly installed on the top of the inner box assembly for guiding the diversion of water vapor and acid vapor, and an outer box assembly installed on the outer periphery of the inner box assembly for switching the distillation state of inlet and outlet water.

[0027] In this embodiment: the inner tank assembly includes an inner tank cylinder 101, the bottom of which is provided with a heating plate 102, and one side of the bottom of the inner tank cylinder 101 is provided with a waste pipe 103, and the waste pipe 103 is provided with a waste valve 104; the circumference of the inner tank cylinder 101 is provided with a connecting flange 105, which is arranged at one fourth of the top end of the inner tank cylinder 101, and the bottom of the connecting flange 105 is pasted with a sealing gasket 106; the inner tank cylinder 101 is connected and fixed in the middle of the outer tank cylinder 301 through the connecting flange 105, and the sealing gasket 106 ensures the sealing of the connection; during distillation and purification, the heating plate 102 heats the waste sulfuric acid contained in the inner tank cylinder 101 to form water vapor and acid vapor, which are used for distillation and purification; after completion, the waste valve 104 is opened, and the waste liquid flows out of the inner tank cylinder 101 from the waste pipe 103;

[0028] In this embodiment: the tank cover assembly includes a gas guide mechanism for converging steam and distributing; the gas guide mechanism is provided with a liquid inlet pipe 204, and the liquid inlet pipe 204 is provided with a liquid inlet valve 205; the gas guide mechanism includes a gas guide cover 201, the bottom circumference of which is provided with a connecting rim 202, and the top end of the gas guide cover 201 is provided with a gas guide pipe 203, and the gas guide pipe 203 is provided with a three-way pipe 206 at the gas outlet end; the gas guide cover 201 is in the shape of a horn, and the gas guide pipe 203 is inclined downward at an angle of 10 degrees with the horizontal; the liquid inlet valve 205 is opened, and the waste sulfuric acid is injected into the inner tank cylinder 101 from the liquid inlet pipe 204; after reaching the set value, the liquid inlet valve 205 is closed, and the water vapor and acid vapor are collected in the gas guide cover 201 in time periods, and flow to the three-way pipe 206 from the gas guide pipe 203, and then the water vapor condensing equipment and the acid vapor condensing equipment are opened in time periods, so that the water vapor flows to the water vapor condensing equipment through the three-way pipe 206 for collection, and the acid vapor flows to the acid vapor condensing equipment through the three-way pipe 206 for collection;

[0029] In this embodiment: the outer box assembly includes an outer box cylinder 301, which is provided with an inlet and outlet water mechanism on one side, and a pressure relief valve 308 on the side away from the inlet and outlet water mechanism; the inlet and outlet water mechanism includes a water inlet pipe 304 provided on the top of the outer box cylinder 301 and a water outlet pipe 306 provided on the bottom of the outer box cylinder 301, a water inlet valve 305 is installed on the water inlet pipe 304, and a water outlet valve 307 is installed on the water outlet pipe 306; the bottom surface of the outer box cylinder 301 is uniformly distributed with a plurality of support legs 302, and the front surface of the outer box cylinder 301 is provided with a liquid level window 303; open the water inlet valve 305, and make the purified water flow into the outer box cylinder 301 from the water inlet pipe 304, check through the liquid level window 303, and close the water inlet valve 305 when reaching the set value; the purified water in the outer box cylinder 301 is heated, the pressure in the outer box cylinder 301 is slightly higher than that in the inner box cylinder 101 due to the limitation of the pressure relief valve 308, so the boiling point of the purified water in the outer box cylinder 301 rises, while the boiling point of the water liquid in the waste sulfuric acid in the inner box cylinder 101 remains unchanged, thereby boiling into water vapor; after the collection of water vapor is completed, open the water outlet valve 307, and make the purified water flow out of the outer box cylinder 301 from the water outlet pipe 306.

[0030] Working principle: first open the liquid inlet valve 205, and inject the waste sulfuric acid into the inner box cylinder 101 from the liquid inlet pipe 204; when reaching the set value, close the liquid inlet valve 205, then open the water inlet valve 305, and make the purified water flow into the outer box cylinder 301 from the water inlet pipe 304; check through the liquid level window 303, and close the water inlet valve 305 when reaching the set value; then heat the inner box cylinder 101 through the heating plate 102, and the purified water in the outer box cylinder 301 is also heated; the pressure in the outer box cylinder 301 is slightly higher than that in the inner box cylinder 101 due to the limitation of the pressure relief valve 308, so the boiling point of the purified water in the outer box cylinder 301 rises, while the boiling point of the water liquid in the waste sulfuric acid in the inner box cylinder 101 remains unchanged, thereby boiling into water vapor; at the same time, since the boiling point of sulfuric acid in the waste sulfuric acid is higher than that of water liquid, the waste sulfuric acid will not temporarily boil into acid vapor; the water vapor converges along the gas guide cover 201, flows to the three-way pipe 206 from the gas guide pipe 203, the water vapor condensing equipment is opened, and the water vapor flows to the water vapor condensing equipment through the three-way pipe 206 for collection; after the collection of water vapor is completed, the water outlet valve 307 is opened, and the purified water flows out of the outer box cylinder 301 from the water outlet pipe 306; the heating plate 102 continues to heat the inner box cylinder 101, and since there is a lack of the boiling point of the purified water, the sulfuric acid in the waste sulfuric acid boils into acid vapor at this time; the acid vapor converges along the gas guide cover 201, flows to the three-way pipe 206 from the gas guide pipe 203, the acid vapor condensing equipment is opened, and the acid vapor flows to the acid vapor condensing equipment through the three-way pipe 206 for collection; after the collection of acid vapor is completed, the waste liquid flows out of the inner box cylinder 101 from the waste discharge pipe 103 by opening the waste discharge valve 104.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A distillation purification apparatus for spent sulfuric acid comprising an inner tank assembly for holding spent sulfuric acid for heating, characterized by: Also included is the inner tank assembly top-mounted for guiding water vapor and acid vapor diversion box cover assembly, the inner tank assembly outer peripheral installation for access to water liquid switching distillation state of the outer tank assembly; The box cover assembly includes a gas guide mechanism for converging steam and diversion, the gas guide mechanism is provided with a liquid inlet pipe (204), the liquid inlet pipe (204) is provided with a liquid inlet valve (205); The outer tank assembly includes an outer tank cylinder (301), one side of the outer tank cylinder (301) is provided with an inlet and outlet water mechanism, and the outer tank cylinder (301) is provided with a pressure relief valve (308) away from the inlet and outlet water mechanism.

2. A device for distilling and purifying spent sulfuric acid according to claim 1, characterized in that: The inner tank assembly includes an inner tank cylinder (101), the bottom of the inner tank cylinder (101) is provided with a heating plate (102), one side of the bottom of the inner tank cylinder (101) is provided with a waste pipe (103), and the waste pipe (103) is provided with a waste valve (104).

3. A distillation apparatus for purifying spent sulfuric acid according to claim 2, characterized in that: The inner tank cylinder (101) is provided with a connecting flange (105) around the circumference, the connecting flange (105) is arranged at one fourth of the top end of the inner tank cylinder (101), and the bottom of the connecting flange (105) is pasted with a sealing gasket (106).

4. A device for distilling and purifying spent sulfuric acid according to claim 1, characterized in that: The gas guide mechanism includes a gas guide cover (201), the bottom of the gas guide cover (201) is provided with a connecting rim (202), the top end of the gas guide cover (201) is provided with a gas guide pipe (203), and the gas guide pipe (203) is provided with a three-way pipe (206).

5. A distillation apparatus for purifying spent sulfuric acid according to claim 4, characterized in that: The gas guide cover (201) is a horn shape, and the gas guide pipe (203) is inclined downward and arranged at an angle of 10 degrees with the horizontal.

6. A device for distilling and purifying spent sulfuric acid according to claim 1, characterized in that: The inlet and outlet water mechanism includes a water inlet pipe (304) arranged at the top of the outer tank cylinder (301) and a water outlet pipe (306) arranged at the bottom of the outer tank cylinder (301), the water inlet pipe (304) is provided with a water inlet valve (304), and the water outlet pipe (306) is provided with a water outlet valve (307).

7. A distillation apparatus for purifying spent sulfuric acid as claimed in claim 6, wherein: The bottom of the outer tank cylinder (301) is uniformly distributed with a plurality of support legs (302), and the front of the outer tank cylinder (301) is provided with a liquid level window (303).

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