Preheater for waste sulfuric acid regeneration

Abstract

The utility model provides a preheater for waste sulfuric acid regeneration, which comprises a water storage tank and a preheating tank, a preheating component is arranged in the preheating tank, heat preservation components are arranged on the outer surfaces of the water storage tank and the preheating tank, and water in the water storage tank is heated by controlling a plurality of electric heating pipes to work according to the set temperature. Then a hot water pump is controlled to pump hot water in the water storage tank into the preheating tank through a water inlet pipe, so that the hot water in the preheating tank preheats the flowing waste sulfuric acid liquid through a flow guide pipe, and in the process, the heat absorption area of the flow guide pipe can be increased through a plurality of heat absorption fins; the multiple blocking pieces arranged in a staggered mode can slow down the flowing speed of the waste sulfuric acid at the bent position of the flow guide pipe, so that the flow guide pipe can better preheat the flowing waste sulfuric acid, and meanwhile, the first heat insulation layer and the first heat preservation layer enable the heat preservation and heat insulation capacity of the preheating tank to be better; the blocking layer, the second heat insulation layer and the second heat preservation layer enable the heat preservation capacity of the water storage tank to be better.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste sulfuric acid regeneration technical field, specifically is a preheater for waste sulfuric acid regeneration. BACKGROUND

[0002] Waste sulfuric acid regeneration refers to the treatment of waste sulfuric acid generated during production and use, removing impurities therein through physical or chemical methods, and restoring it to a state of being reusable. Waste sulfuric acid regeneration not only reduces environmental pollution, but also saves resources, has high environmental and economic benefits. In the waste sulfuric acid regeneration process, the waste sulfuric acid to be regenerated is preheated to a specified temperature by a preheater to improve the subsequent regeneration efficiency and effect.

[0003] The preheating effect of the preheater for waste sulfuric acid regeneration in the prior art is poor, and the waste sulfuric acid cannot be fully preheated during use, which easily leads to uneven preheating of the waste sulfuric acid, thereby affecting the subsequent regeneration efficiency and effect. Moreover, the existing preheater has weak heat insulation capacity, which leads to rapid heat loss to the outside during actual use, thereby further affecting the heating effect of the preheater. SUMMARY

[0004] The utility model aims at providing a preheater for waste sulfuric acid regeneration to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A preheater for waste sulfuric acid regeneration, comprising a water storage tank, a blocking plate, a drain valve, a water replenishment valve, a preheating tank and support legs, the front end face of the water storage tank is provided with a blocking plate, the upper side of the right end face of the water storage tank is provided with a water replenishment valve, the lower side of the right end face of the water storage tank is provided with a drain valve, the upper end face of the water storage tank is fixedly connected with support legs, the upper end of the support legs is fixedly connected with a preheating tank, a preheating assembly is arranged inside the preheating tank, and the preheating assembly is used for preheating the regenerated waste sulfuric acid, and heat preservation assemblies are arranged on the outer surfaces of the water storage tank and the preheating tank, and the heat preservation assemblies are used for improving the heat preservation capacity of the water storage tank and the preheating tank.

[0007] Preferably, the preheating assembly comprises a flow guide pipe, a water inlet pipe, a hot water pump, an electric heating pipe and a water outlet pipe, the lower side of the left end face of the water storage tank is provided with a hot water pump, the outlet end of the hot water pump is connected with a water inlet pipe, the right side of the upper end face of the water storage tank is fixedly connected with a water outlet pipe, the inside of the preheating tank is fixedly connected with a flow guide pipe, and the inside of the water storage tank is provided with a plurality of electric heating pipes.

[0008] Preferably, the flow guide pipe is in the shape of a snake, a plurality of heat absorbing fins are fixedly connected to the annular side face of the flow guide pipe, a plurality of blocking pieces are fixedly connected to the inside of the flow guide pipe at the curved portions, and the plurality of blocking pieces are arranged in a staggered manner.

[0009] Preferably, the heat preservation assembly comprises a first heat preservation layer, a first heat insulation layer and a barrier layer, the annular side surface of the preheating tank is provided with the first heat insulation layer, the annular side surface of the first heat insulation layer is provided with the first heat preservation layer, and the outer surface of the water storage tank is provided with the barrier layer.

[0010] Preferably, the outer surface of the barrier layer is provided with a second heat insulation layer, the outer surface of the second heat insulation layer is provided with a second heat preservation layer, and the front end surface of the blocking plate is provided with a third heat insulation layer.

[0011] Preferably, the first heat preservation layer and the second heat preservation layer are made of environment-friendly heat preservation cotton, the first heat insulation layer, the second heat insulation layer and the third heat insulation layer are made of heat insulation cotton, and the barrier layer is made of aerogel felt.

[0012] Preferably, a thermometer is installed on the left side of the upper end surface of the water storage tank, and a connecting valve is installed between the water storage tank and the preheating tank.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. In the process of regenerating waste sulfuric acid, by controlling multiple electric heating pipes to work according to the set temperature, the multiple electric heating pipes can heat the water in the water storage tank, then the hot water pump pumps the hot water in the water storage tank into the preheating tank through the water inlet pipe, so that the hot water in the preheating tank heats the flow guide pipe, and the flow guide pipe preheats the waste sulfuric acid liquid flowing through it; in this process, the multiple heat absorbing fins can increase the heat absorbing area of the flow guide pipe, and the multiple staggered blocking pieces can slow down the flow rate of the waste sulfuric acid at the bending part of the flow guide pipe, so that the flow guide pipe can better preheat the waste sulfuric acid flowing through it.

[0015] 2. The first heat insulation layer and the first heat preservation layer are arranged, so that the heat preservation and heat insulation capacity of the preheating tank is better, the heat in the preheating tank is prevented from flowing out quickly, the barrier layer, the second heat insulation layer and the second heat preservation layer make the heat preservation capacity of the water storage tank better, and the third heat insulation layer also makes the heat insulation capacity of the blocking plate better, so that the heat in the water storage tank is prevented from flowing out quickly. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the main body structure of the utility model;

[0017] Figure 2 It is a front view of the preheating assembly and the heat preservation assembly in the utility model;

[0018] Figure 3 It is a front view of the preheating assembly and the heat preservation assembly in the utility model; Figure 2 It is an enlarged view of A in the utility model;

[0019] Figure 4It is the structure diagram of the water storage tank in the utility model.

[0020] Figure 5 It is the structure diagram of the preheating tank in the utility model.

[0021] In the drawing: 1, water storage tank; 2, plugging plate; 21, third heat insulation layer; 3, drain valve; 4, water replenishing valve; 5, preheating tank; 6, supporting leg; 71, flow guide pipe; 72, heat absorbing fin; 73, water inlet pipe; 74, thermometer; 75, hot water pump; 76, electric heating pipe; 77, connecting valve; 78, water outlet pipe; 79, blocking piece; 81, first heat preservation layer; 82, first heat insulation layer; 83, second heat preservation layer; 84, second heat insulation layer; 85, blocking layer. DETAILED DESCRIPTION

[0022] 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 protection scope of the utility model.

[0023] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0024] Embodiment one:

[0025] A preheater for waste sulfuric acid regeneration, including water storage tank 1, plugging plate 2, drain valve 3, water replenishing valve 4, preheating tank 5 and supporting leg 6, water storage tank 1 front end face installs plugging plate 2, plugging plate 2 is separately detachable structure, and the separately detachable plugging plate 2 is convenient for later period staff to maintain the inside of water storage tank 1, and water storage tank 1 right end face upper side installs water replenishing valve 4, and the inlet end of water replenishing valve 4 is connected with the outlet of outside industrial water storage tank through pipeline, and water replenishing valve 4 is convenient for staff to replenish water to the inside of water storage tank 1, and water storage tank 1 right end face lower side installs drain valve 3, and the outlet end of drain valve 3 is connected with outside sewer pipeline through pipeline, and drain valve 3 is convenient for staff to drain the water inside water storage tank 1 and replace, and water storage tank 1 upper end is fixedly connected with supporting leg 6, and supporting leg 6 can support and fix preheating tank 5, and the upper end of supporting leg 6 is fixedly connected with preheating tank 5, and preheating tank 5 is convenient for preheating assembly to preheat the waste sulfuric acid passing.

[0026] Preheating tank 5 is internally provided with preheating assembly, and the preheating assembly is used for preheating regenerated waste sulfuric acid, the outer surfaces of water storage tank 1 and preheating tank 5 are provided with heat preservation assembly, and the heat preservation assembly is used for improving the heat preservation capacity of water storage tank 1 and preheating tank 5, and the front side of the upper end of water storage tank 1 is provided with water level observation window, and the water level observation window is convenient for staff to observe the water level inside water storage tank 1 in real time.

[0027] The preheating assembly comprises a flow guide pipe 71, a water inlet pipe 73, a hot water pump 75, an electric heating pipe 76 and a water outlet pipe 78. The hot water pump 75 is installed on the lower side of the left end face of the water storage tank 1 and is connected with an external control switch through a wire. The hot water pump 75 can transport water in the water storage tank 1 to the water inlet pipe 73 when working. The water inlet pipe 73 is connected with the outlet end of the hot water pump 75 and can guide water into the inside of the preheating tank 5. The water outlet pipe 78 is fixedly connected with the right side of the upper end face of the water storage tank 1 and can guide high-position water in the preheating tank 5 into the water storage tank 1 again for recycling. The flow guide pipe 71 is fixedly connected inside the preheating tank 5 and is in the shape of a snake. The upper end of the flow guide pipe 71 is connected with an acid inlet pipe and the lower end is connected with an acid outlet pipe. The flow guide pipe 71 in the shape of a snake can prolong the flow length of waste sulfuric acid in the preheating tank 5, so that the hot water in the preheating tank 5 can heat the waste sulfuric acid better through the flow guide pipe 71. The material of the flow guide pipe 71 is 904L stainless steel. The flow guide pipe 71 made of 904L stainless steel has better acid and corrosion resistance, thereby ensuring the service life of the flow guide pipe 71.

[0028] A plurality of electric heating pipes 76 are installed inside the water storage tank 1 and are connected with an external temperature controller through wires. The plurality of electric heating pipes 76 can heat the water inside the water storage tank 1. A plurality of heat absorption fins 72 are fixedly connected with the annular side face of the flow guide pipe 71. The plurality of heat absorption fins 72 can increase the heat absorption area of the flow guide pipe 71, so that the flow guide pipe 71 can better preheat the waste sulfuric acid flowing therethrough. A plurality of blocking pieces 79 are fixedly connected with the inside of the flow guide pipe 71 and are staggered. The plurality of blocking pieces 79 can slow down the flow speed of the waste sulfuric acid at the curved part of the flow guide pipe 71. A thermometer 74 is installed on the left side of the upper end face of the water storage tank 1 and can display the water temperature inside the water storage tank 1 in real time. A connecting valve 77 is installed between the water storage tank 1 and the preheating tank 5 and can facilitate the staff to drain all the water in the preheating tank 5 into the water storage tank 1 for replacement.

[0029] Embodiment two:

[0030] On the basis of embodiment one, the first heat insulation layer 82 and the first heat preservation layer 81 arranged in this embodiment make the heat preservation and insulation capacity of the preheating tank 5 better, so as to avoid the rapid loss of heat in the preheating tank 5 to the outside. The blocking layer 85, the second heat insulation layer 84 and the second heat preservation layer 83 make the heat preservation capacity of the water storage tank 1 better. The third heat insulation layer 21 also makes the heat insulation capacity of the blocking plate 2 better, thereby avoiding the rapid loss of heat in the water storage tank 1 to the outside.

[0031] The heat preservation assembly comprises a first heat preservation layer 81, a first heat insulation layer 82 and a barrier layer 85. The first heat insulation layer 82 is arranged on the annular side surface of the preheating tank 5. The first heat insulation layer 82 is made of heat insulation cotton, so that the heat insulation capacity of the preheating tank 5 is better. The first heat insulation layer 82 is provided with the first heat preservation layer 81. The first heat preservation layer 81 is made of environment-friendly heat preservation cotton, so that the heat preservation capacity of the preheating tank 5 is better, thereby avoiding the rapid loss of heat in the preheating tank 5 to the outside. The outer surface of the water storage tank 1 is provided with the barrier layer 85. The barrier layer 85 is made of aerogel felt, and has a low thermal conductivity, so as to improve the heat insulation capacity of the water storage tank 1.

[0032] The outer surface of the barrier layer 85 is provided with the second heat insulation layer 84. The second heat insulation layer 84 is made of heat insulation cotton, so as to further improve the heat insulation capacity of the water storage tank 1. The outer surface of the second heat insulation layer 84 is provided with the second heat preservation layer 83. The second heat preservation layer 83 is made of environment-friendly heat preservation cotton, so that the heat preservation capacity of the water storage tank 1 is better. The front end surface of the blocking plate 2 is provided with the third heat insulation layer 21. The third heat insulation layer 21 is made of heat insulation cotton, so that the heat insulation capacity of the blocking plate 2 is better, thereby avoiding the rapid loss of heat in the water storage tank 1 to the outside.

[0033] Working principle: in the process of regenerating waste sulfuric acid, the waste sulfuric acid to be regenerated needs to be preheated in advance, the staff first controls a plurality of electric heating pipes 76 to work according to the set temperature through an external temperature controller, so that the plurality of electric heating pipes 76 heat the water in the water storage tank 1, in this process, the thermometer 74 can display the water temperature in the water storage tank 1 in real time, when the water temperature in the water storage tank 1 reaches the required temperature value, the hot water pump 75 can be started, so that the hot water pump 75 pumps the hot water in the water storage tank 1 into the preheating tank 5 through the water inlet pipe 73, in this process, the water level of the hot water in the preheating tank 5 gradually rises, when the water level of the hot water rises to the high position, the water outlet pipe 78 can guide the hot water at the high position into the water storage tank 1 again for circulation and use; then the staff can guide the waste sulfuric acid liquid to be preheated into the flow guide pipe 71 through the acid inlet pipe, in this process, the hot water in the preheating tank 5 can heat the flow guide pipe 71, so that the flow guide pipe 71 can preheat the waste sulfuric acid liquid flowing through it, at the same time, the plurality of heat absorption fins 72 can increase the heat absorption area of the flow guide pipe 71, and the plurality of staggered blocking pieces 79 can slow down the flowing speed of the waste sulfuric acid at the bending part of the flow guide pipe 71, so that the flow guide pipe 71 can better preheat the waste sulfuric acid flowing through it, the preheated waste sulfuric acid liquid can be discharged through the acid discharge pipe and enter the next process for regeneration treatment; during the use of the preheating tank 5 and the water storage tank 1, the first heat insulation layer 82 made of heat insulation cotton can better insulate the preheating tank 5, and the first heat preservation layer 81 made of environment-friendly heat preservation cotton can better preserve the heat of the preheating tank 5, so as to avoid the rapid loss of heat in the preheating tank 5, at the same time, the blocking layer 85 made of aerogel felt can improve the heat insulation capacity of the water storage tank 1, the second heat insulation layer 84 made of heat insulation cotton can further improve the heat insulation capacity of the water storage tank 1, and the second heat preservation layer 83 made of environment-friendly heat preservation cotton can better preserve the heat of the water storage tank 1, and the third heat insulation layer 21 made of heat insulation cotton can better insulate the blocking plate 2, so as to avoid the rapid loss of heat in the water storage tank 1, when the waste sulfuric acid liquid does not need to be preheated, the hot water pump 75 and the electric heating pipe 76 can be closed respectively.

[0034] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A preheater for waste sulfuric acid regeneration, comprising a water storage tank (1), a blocking plate (2), a drain valve (3), a water supply valve (4), a preheating tank (5) and support legs (6), characterized in that: The front end face of the water storage tank (1) is provided with a blocking plate (2), the upper side of the right end face of the water storage tank (1) is provided with a water replenishing valve (4), the lower side of the right end face of the water storage tank (1) is provided with a water draining valve (3), the upper end face of the water storage tank (1) is fixedly connected with a supporting leg (6), and the upper end of the supporting leg (6) is fixedly connected with a preheating tank (5). The preheating tank (5) is internally provided with a preheating assembly for preheating regenerated waste sulfuric acid, and the outer surfaces of the water storage tank (1) and the preheating tank (5) are provided with heat preservation assemblies for improving the heat preservation capacity of the water storage tank (1) and the preheating tank (5).

2. A preheater for regeneration of spent sulfuric acid according to claim 1, characterized in that: The preheating assembly comprises a flow guide pipe (71), a water inlet pipe (73), a hot water pump (75), an electric heating pipe (76) and a water outlet pipe (78), the lower side of the left end face of the water storage tank (1) is provided with the hot water pump (75), the outlet end of the hot water pump (75) is connected with the water inlet pipe (73), the right side of the upper end face of the water storage tank (1) is fixedly connected with the water outlet pipe (78), the inside of the preheating tank (5) is fixedly connected with the flow guide pipe (71), and the inside of the water storage tank (1) is provided with a plurality of electric heating pipes (76).

3. A preheater for regeneration of spent sulfuric acid according to claim 2, characterized in that: The flow guide pipe (71) is in a serpentine shape, a plurality of heat absorbing fins (72) are fixedly connected to the annular side face of the flow guide pipe (71), a plurality of blocking pieces (79) are fixedly connected to the internal curved portions of the flow guide pipe (71), and the plurality of blocking pieces (79) are staggered.

4. A preheater for regeneration of spent sulfuric acid according to claim 1, characterized in that: The heat preservation assembly comprises a first heat preservation layer (81), a first heat insulation layer (82) and a blocking layer (85), the annular side face of the preheating tank (5) is provided with the first heat insulation layer (82), the annular side face of the first heat insulation layer (82) is provided with the first heat preservation layer (81), and the outer surface of the water storage tank (1) is provided with the blocking layer (85).

5. A preheater for regeneration of spent sulfuric acid according to claim 4, characterized in that: The outer surface of the blocking layer (85) is provided with a second heat insulation layer (84), the outer surface of the second heat insulation layer (84) is provided with a second heat preservation layer (83), and the front end face of the blocking plate (2) is provided with a third heat insulation layer (21).

6. A preheater for regeneration of spent sulfuric acid according to claim 5, characterized in that: The first heat preservation layer (81) and the second heat preservation layer (83) are made of environment-friendly heat preservation cotton, the first heat insulation layer (82), the second heat insulation layer (84) and the third heat insulation layer (21) are made of heat insulation cotton, and the blocking layer (85) is made of aerogel felt.

7. A preheater for regeneration of spent sulfuric acid according to claim 1, characterized in that: A thermometer (74) is mounted to the left side of the upper end face of the water storage tank (1), and a connecting valve (77) is mounted between the water storage tank (1) and the preheating tank (5).

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