Dilute sulfuric acid concentration device

Abstract

The utility model relates to the technical field of dilute sulphuric acid, and discloses a dilute sulphuric acid concentration device which comprises a heat preservation box and a concentration tank, a vacuum stirring mechanism is arranged on the heat preservation box, and the vacuum stirring mechanism comprises a vacuum meter, a vacuum pump, a pressure regulating valve, a vacuum pipe, a corrosion-resistant rotating rod and a corrosion-resistant stirring blade. The concentration tank is fixedly mounted in the heat preservation box. Sulfuric acid in the concentration tank can be stirred by the corrosion-resistant stirring blades, a sulfuric acid solution is continuously stirred by the corrosion-resistant stirring blades, so that heat can be quickly and uniformly diffused in the whole solution, the formation of a local overheating or supercooling area is avoided, the vacuum meter is used for detecting the pressure in the concentration tank, and the vacuum degree can be adjusted by the pressure adjusting valve. By reducing the pressure in the concentration tank, the boiling point of the sulfuric acid is obviously reduced, and the boiling point of the sulfuric acid can be greatly reduced under a certain vacuum degree, so that the concentration can be more efficiently realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dilute sulfuric acid, specifically to a dilute sulfuric acid concentration device. BACKGROUND

[0002] Dilute sulfuric acid concentration is a chemical process, which refers to the process of removing part of the solvent (mainly water) in a low-concentration sulfuric acid solution (i.e. dilute sulfuric acid) through physical or chemical methods, thereby increasing the mass fraction of sulfuric acid and obtaining a higher-concentration sulfuric acid solution.

[0003] According to the dilute sulfuric acid concentration device disclosed in Chinese Patent No. CN210078872U, a dilute sulfuric acid concentration device includes a concentration kettle, a flow-through channel is provided inside the concentration kettle from top to bottom, a liquid inlet and a gas outlet are provided at the top of the concentration kettle, a liquid outlet is provided at the bottom of the concentration kettle, and a heating assembly is provided at the bottom of the flow-through channel. The dilute sulfuric acid is continuously heated and warmed during the flow process, and the water is continuously vaporized. The gas-phase material runs upward along the flow-through channel and contacts the downward-running dilute sulfuric acid to exchange heat and mass. The downward-flowing liquid phase stream absorbs the vaporized sulfuric acid and the decomposed SO3 and carries them back to the concentration kettle. The concentration of the dilute sulfuric acid in the concentration kettle increases continuously during the movement process, and the concentrated sulfuric acid finally flows out of the liquid outlet at the bottom of the concentration kettle. The utility model forms a gradient temperature zone in the concentration kettle to heat the dilute sulfuric acid. The vaporized water in the dilute sulfuric acid further exchanges heat with the dilute sulfuric acid, improving the concentration effect and efficiency of the dilute sulfuric acid and reducing the energy consumption required for heating. The above-mentioned device is used to heat and concentrate under normal pressure. The boiling point of sulfuric acid is relatively high, and a large amount of heat energy is consumed. Long-term high-temperature heating further increases the probability of side reactions and the wear and tear of equipment. Therefore, a dilute sulfuric acid concentration device is proposed to solve the above-mentioned problems. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a dilute sulfuric acid concentration device to solve the above-mentioned problems in the prior art.

[0005] To solve the above-mentioned technical problems, the utility model adopts the technical scheme of a dilute sulfuric acid concentration device, which includes an insulation box and a concentration tank. A vacuum stirring mechanism is provided on the insulation box. The vacuum stirring mechanism includes a vacuum gauge, a vacuum pump, a pressure regulating valve, a vacuum pipe, a corrosion-resistant rotating shaft, and corrosion-resistant stirring blades. The concentration tank is fixedly installed inside the insulation box. The vacuum gauge is fixedly installed at the top of the insulation box. The vacuum pump is fixedly installed at the top of the insulation box. The pressure regulating valve is connected to the vacuum pump through a connecting pipe. The vacuum pipe is in communication with the pressure regulating valve. The corrosion-resistant rotating shaft is rotatably connected to the insulation box through a bearing. The corrosion-resistant stirring blades are fixedly installed on the outer wall of the corrosion-resistant rotating shaft.

[0006] Preferably, the vacuum stirring mechanism further comprises a motor, a bevel gear set, the motor is fixedly installed on the top of the heat preservation box, one bevel gear of the bevel gear set is fixedly sleeved on the outer wall of the motor output shaft, and the other bevel gear of the bevel gear set is fixedly sleeved on the outer wall of the top end of the corrosion-resistant rotating rod. Through the above-mentioned preferred, the motor is started, so that the motor output shaft drives the bevel gear set fixedly sleeved on the outer wall to rotate.

[0007] Preferably, the vacuum stirring mechanism further comprises a feeding pipe and a feeding valve, the feeding pipe is fixedly installed on the top of the heat preservation box, and the feeding valve is fixedly installed on the feeding pipe. Through the above-mentioned preferred, the feeding valve is opened, and then the sulfuric acid material enters the inside of the concentration tank through the feeding pipe.

[0008] Preferably, the heat and discharge mechanism further comprises a heating device, and the heating device is fixedly installed on one side of the heat preservation box. Through the above-mentioned preferred, the heating device is started, so that the sulfuric acid in the inside of the concentration tank can be heated.

[0009] Preferably, the heat and discharge mechanism further comprises a spiral heating pipe, and the spiral heating pipe is sleeved on the outer wall of the concentration tank. Through the above-mentioned preferred, under the heating action of the heating device and the spiral heating pipe, the sulfuric acid in the inside of the concentration tank can be heated.

[0010] Preferably, the heat and discharge mechanism further comprises a discharge pipe and a discharge valve, the discharge pipe is fixedly installed on the bottom of the heat preservation box, and the discharge valve is fixedly installed on the discharge pipe. Through the above-mentioned preferred, the discharge valve is opened, and then the concentrated sulfuric acid can be discharged through the discharge pipe.

[0011] The above-mentioned technical scheme can bring the following beneficial effects:

[0012] 1. The dilute sulfuric acid concentration device, through the cooperation of the vacuum gauge, the vacuum pump, the pressure regulating valve, the vacuum pipe, the corrosion-resistant rotating rod, the corrosion-resistant stirring blade, the motor, the bevel gear set, the feeding pipe and the feeding valve, the corrosion-resistant stirring blade can stir the sulfuric acid in the inside of the concentration tank, the corrosion-resistant stirring blade continuously stirs the sulfuric acid solution, heat can be quickly and uniformly diffused in the whole solution, local overheating or overcooling area is avoided, the vacuum gauge is used for detecting the pressure in the concentration tank, the pressure regulating valve can adjust the vacuum degree, so that the boiling point can be reduced and the evaporation can be accelerated, through reducing the pressure in the concentration tank, the boiling point of the sulfuric acid is significantly reduced, under a certain vacuum degree, the boiling point can be greatly reduced, concentration can be more efficiently realized, and the occurrence of side reactions caused by long-time heating at high temperature can be reduced in the decompression environment.

[0013] 2. The dilute sulfuric acid concentration device, through the cooperation of heating equipment, spiral heating pipe, discharge pipe, discharge valve, under the heating action of heating equipment and spiral heating pipe, the sulfuric acid in the concentration tank can be heated, and the concentrated sulfuric acid can be discharged through the discharge pipe by opening the discharge valve. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic diagram of the utility model;

[0015] Figure 2 It is a structure schematic diagram of the utility model heat preservation box internal structure;

[0016] Figure 3 It is a structure schematic diagram of the utility model concentration tank internal structure;

[0017] Figure 4 It is a structure schematic diagram of the utility model side view structure.

[0018] In the figure: 1, heat preservation box; 21, vacuum stirring mechanism; 211, vacuum table; 212, vacuum pump; 213, pressure regulating valve; 214, vacuum pipe; 215, corrosion-resistant rotating rod; 216, corrosion-resistant stirring blade; 217, motor; 218, bevel gear set; 219, feed pipe; 220, feed valve; 31, heating and discharging mechanism; 311, heating equipment; 312, spiral heating pipe; 313, discharge pipe; 314, discharge valve. DETAILED DESCRIPTION

[0019] 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, not 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.

[0020] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0021] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "connection", "arrangement" should do broad sense understanding, for example, can be fixedly connected, arrangement, also can be detachable connection, arrangement, or integrally connected, arrangement. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0022] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "several" is two or more than two, unless otherwise explicitly limited.

[0023] Please refer to Figures 1-4 An embodiment of the utility model is: a dilute sulfuric acid concentration device, including heat preservation box 1 and concentration tank, vacuum stirring mechanism 21 is arranged on heat preservation box 1, vacuum stirring mechanism 21 includes vacuum table 211, vacuum pump 212, pressure regulating valve 213, vacuum pipe 214, corrosion-resistant rotating rod 215, corrosion-resistant stirring vane 216, concentration tank is fixedly installed in heat preservation box 1, vacuum table 211 is fixedly installed at heat preservation box 1 top, vacuum pump 212 is fixedly installed at heat preservation box 1 top, pressure regulating valve 213 is connected with vacuum pump 212 by connecting pipe, vacuum pipe 214 is communicated with pressure regulating valve 213 and is arranged, corrosion-resistant rotating rod 215 is rotatably connected on heat preservation box 1 by bearing, corrosion-resistant stirring vane 216 is fixedly installed in the outer wall of corrosion-resistant rotating rod 215, vacuum stirring mechanism 21 still includes motor 217, helical gear set 218, motor 217 is fixedly installed at heat preservation box 1 top, one helical gear of helical gear set 218 is fixedly sleeved in the outer wall of motor 217 output shaft, another helical gear of helical gear set 218 is fixedly sleeved in the outer wall of corrosion-resistant rotating rod 215 top end, vacuum stirring mechanism 21 still includes feed pipe 219, feed valve 220, feed pipe 219 is fixedly installed at heat preservation box 1 top, feed valve 220 is fixedly installed on feed pipe 219;

[0024] Working principle: by opening the feed valve 220, sulfuric acid material is through the feed pipe 219 into the inside of the concentration tank, by starting the motor 217, the motor 217 output shaft drives the bevel gear set 218 fixed on the outer wall to rotate, under the transmission connection of two mutually meshing bevel gears, the corrosion-resistant rotating rod 215 is driven to rotate, so that the corrosion-resistant stirring blade 216 fixedly installed on the outer wall of the corrosion-resistant rotating rod 215 is driven to rotate, the corrosion-resistant stirring blade 216 can stir the sulfuric acid in the concentration tank, the corrosion-resistant stirring blade 216 constantly stirs the sulfuric acid solution, so that the heat can be quickly and uniformly spread in the whole solution, avoiding the formation of local overheating or supercooling area, by starting the vacuum pump 212, the vacuum gauge 211 is used for detecting the pressure in the concentration tank, and the pressure regulating valve 213 can adjust the vacuum degree, so that the boiling point can be reduced to accelerate evaporation, by reducing the pressure in the concentration tank, the boiling point of sulfuric acid is significantly reduced, and under a certain vacuum degree, the boiling point can be greatly reduced, so that the concentration can be more efficiently realized, and the by-reaction caused by high temperature and long time heating can be reduced.

[0025] Please refer to Figures 1-4 On the basis of the above embodiment, in another embodiment of the utility model, the heat preservation box 1 still is provided with heating and discharging mechanism 31, heating and discharging mechanism 31 includes heating equipment 311, and heating equipment 311 is fixedly installed on one side of heat preservation box 1, and heating and discharging mechanism 31 still includes spiral heating pipe 312, and spiral heating pipe 312 is sleeved in the outer wall of concentration tank, and heating and discharging mechanism 31 still includes discharging pipe 313 and discharging valve 314, and discharging pipe 313 is fixedly installed at the bottom of heat preservation box 1, and discharging valve 314 is fixedly installed on discharging pipe 313.

[0026] Working principle: by starting heating equipment 311, under the heating action of heating equipment 311 and spiral heating pipe 312, the sulfuric acid in the concentration tank can be heated, and by opening discharging valve 314, the concentrated sulfuric acid can be discharged through discharging pipe 313.

[0027] It is worth mentioning that, in order to facilitate control, the motor 217 in the above embodiment is provided with a control switch, which can control the motor 217 to work, and the above is prior art, which is not the main innovation point, and will not be described in detail here, in addition, the heating equipment 311 is a common device of prior art, and the type and the like can be customized according to actual use requirements.

[0028] The utility model provides a dilute sulphuric acid concentration device, the method and the approach of specific implementation this technical scheme are many, above only is the preferred implementation mode of the utility model, should point out, for the ordinary skilled person in the art, under the premise of not departing from the principle of the utility model, still can make a number of improvements and the embellishment, these improvements and the embellishment also should be regarded as the protection scope of the utility model. The unexplicited component part of this embodiment can be realized by prior art.

Claims

1. A dilute sulfuric acid concentration device comprising an insulation box (1) and a concentration tank, characterized in that: The vacuum stirring mechanism (21) is arranged on the incubator (1), the vacuum stirring mechanism (21) comprises a vacuum gauge (211), a vacuum pump (212), a pressure regulating valve (213), a vacuum pipe (214), a corrosion-resistant rotating shaft (215), and corrosion-resistant stirring blades (216), the concentration tank is fixedly installed in the incubator (1), the vacuum gauge (211) is fixedly installed on the top of the incubator (1), the vacuum pump (212) is fixedly installed on the top of the incubator (1), the pressure regulating valve (213) is connected with the vacuum pump (212) through a connecting pipe, the vacuum pipe (214) is arranged in communication with the pressure regulating valve (213), the corrosion-resistant rotating shaft (215) is rotatably connected to the incubator (1) through a bearing, and the corrosion-resistant stirring blades (216) are fixedly installed on the outer wall of the corrosion-resistant rotating shaft (215).

2. A dilute sulphuric acid concentration plant according to claim 1, characterized in that: The vacuum stirring mechanism (21) further comprises a motor (217) and a helical gear set (218), the motor (217) is fixedly installed on the top of the incubator (1), one helical gear of the helical gear set (218) is fixedly sleeved on the outer wall of the output shaft of the motor (217), and the other helical gear of the helical gear set (218) is fixedly sleeved on the outer wall of the top end of the corrosion-resistant rotating shaft (215).

3. A dilute sulphuric acid concentration plant according to claim 1, characterized in that: The vacuum stirring mechanism (21) further comprises a feeding pipe (219) and a feeding valve (220), the feeding pipe (219) is fixedly installed on the top of the incubator (1), and the feeding valve (220) is fixedly installed on the feeding pipe (219).

4. A dilute sulphuric acid concentration plant according to claim 1, characterized in that: The heating and discharging mechanism (31) is further arranged on the incubator (1), the heating and discharging mechanism (31) comprises a heating device (311), and the heating device (311) is fixedly installed on one side of the incubator (1).

5. A dilute sulphuric acid concentration plant according to claim 4, characterised in that: The heating and discharging mechanism (31) further comprises a spiral heating pipe (312), and the spiral heating pipe (312) is sleeved on the outer wall of the concentration tank.

6. A dilute sulphuric acid concentration plant according to claim 4, characterised in that: The heating and discharging mechanism (31) further comprises a discharging pipe (313) and a discharging valve (314), the discharging pipe (313) is fixedly installed on the bottom of the incubator (1), and the discharging valve (314) is fixedly installed on the discharging pipe (313).

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