Hot galvanizing pickling waste acid treatment equipment

Abstract

The utility model relates to the technical field of waste acid treatment equipment, and solves the problems that a heating mode in the prior art is easy to damage heating equipment and consumes more energy. The hot galvanizing pickling waste acid treatment equipment comprises a supporting frame, a dissolving tank used for receiving waste acid liquid is arranged at the upper end of the supporting frame, a waste acid liquid pretreatment device is arranged at the upper end of the dissolving tank, the dissolving tank comprises a tank pool installed on the supporting frame, the interior of the tank pool is hollow, and a reaction tank is arranged in the tank pool; a blocking plate connected with a top plate of the tank is arranged at the upper end of the reaction tank, the tank comprises a liquid passing channel and a reaction tank, the forming depth of the reaction tank is larger than that of the liquid passing channel, the reaction tank is arranged in the reaction tank, and the blocking plate is arranged in the liquid passing channel. The reaction tank comprises a tank body mounted in the reaction tank and a plurality of layers of liquid passing holes formed in the tank body, filtering holes are formed between the adjacent layers of liquid passing holes in a staggered manner, and the adjacent filtering holes are connected through strip grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of waste acid treatment equipment, in particular to hot-dip galvanizing pickling waste acid treatment equipment. Background Art

[0002] When the waste acid produced by the pickling line is reprocessed and purified into a ferrous chloride solution, the waste acid needs to be heated to reduce the HCl content and then adjust the pH value. However, the waste acid contains an indefinite proportion of acid and acid salts and impurities, which can easily cause corrosion and scaling of heating equipment such as graphite heat exchangers, resulting in corrosion damage or blockage of the heat exchanger. Moreover, the above-mentioned heat exchanger adopts an indirect heating method, which consumes a lot of energy. Some units also use steam direct heating. Although the heating efficiency is high and the equipment is simple. However, since the steam condensate dilutes the solution, the total amount of processed materials is increased, the workload of subsequent processing is increased, and the energy consumption is increased, and the purity of the ferrous chloride solution is reduced. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a hot-dip galvanizing pickling waste acid treatment device, which solves the problem that the heating method in the prior art easily leads to damage of the heating equipment and high energy consumption.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot-dip galvanizing pickling waste acid treatment equipment, comprising a support frame, a dissolving tank for receiving waste acid liquid is arranged at the upper end of the support frame, and a waste acid liquid pretreatment device is arranged at the upper end of the dissolving tank;

[0005] The dissolving tank comprises a tank installed on a supporting frame, the tank is hollow inside and is provided with a reaction tank, and a blocking plate connected to the tank top plate is provided at the upper end of the reaction tank;

[0006] The tank comprises a liquid passage and a reaction tank. The depth of the reaction tank is greater than the depth of the liquid passage. The reaction tank is arranged in the reaction tank, and the blocking plate is arranged in the liquid passage.

[0007] In one embodiment, the reaction tank comprises a tank body installed in the reaction pool and a plurality of layers of liquid holes opened on the tank body, filter holes are staggered between adjacent layers of liquid holes, and adjacent filter holes are connected by grooves;

[0008] The filter holes are filled with filter plates, and the sum of the thickness of the filter plates and the depth of the strip grooves is equal to the wall thickness of the reaction tank.

[0009] In one embodiment, the waste acid liquid pretreatment device includes a treatment tank installed on the liquid flow channel and connected to the liquid flow channel, the treatment tank is connected to the liquid flow channel by a liquid outlet pipe, an overflow pipe is installed on the treatment tank, a top cover and a nozzle installed on the top cover are arranged at the upper end of the treatment tank, a feed pipe that passes through the top cover is connected to the upper end of the nozzle, the feed pipe introduces the waste acid liquid into the nozzle and evenly sprays it into the treatment tank.

[0010] In one embodiment, the size of the blocking plate is adapted to the liquid passing size of the liquid passing channel to close the liquid passing channel;

[0011] The reaction tank is rectangular and filled with tanks from front to back.

[0012] In one embodiment, the overflow pipe is installed on the processing tank in an inclined shape, and a filter plate and iron filings placed on the filter plate are arranged in the processing tank;

[0013] An air inlet pipe is arranged at the lower end of the processing tank, and its setting position is lower than the installation position of the filter plate.

[0014] In one of the embodiments, a heat-insulating layer is provided on the outer wall of the processing tank.

[0015] Compared with the prior art, the utility model provides a hot-dip galvanizing pickling waste acid treatment equipment, which has the following beneficial effects:

[0016] In the technical solution disclosed by the utility model, a filter plate placed in a treatment tank and iron filings laid on the filter plate are utilized, and the air intake pipe is set at a position lower than the filter plate, so that when hot air is transported from the air intake pipe to the inside of the treatment tank, the movement path of the hot air gradually moves toward the upper end of the treatment tank, heating the waste acid liquid sprayed into the treatment tank, thereby increasing the temperature of the waste acid and improving the efficiency of dissolving the iron filings.

[0017] The utility model divides the tank into a liquid passage and a reaction tank. The liquid passage is opened horizontally, and the reaction tank is arranged at the lower end of the liquid passage to form a water containing cavity. After the liquid passage is blocked by a blocking plate, the waste acid liquid can only be collected in the reaction tank to reduce the flow rate, and is output from the liquid passage to the dissolution tank after passing through the reaction tank, thereby enhancing the reaction degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2This is a schematic diagram of the half-section structure of the utility model tank;

[0021] Figure 3 This is a schematic diagram of the half-section structure of the reaction tank of the utility model.

[0022] In the figure: 1. support frame; 2. dissolving tank; 21. tank pool; 211. liquid passage; 212. reaction tank; 22. reaction tank; 221. tank body; 222. liquid passage hole; 223. filter hole; 224. groove; 225. filter plate; 23. blocking plate; 3. waste acid liquid pretreatment device; 31. treatment tank; 32. overflow pipe; 33. feed pipe; 34. filter plate; 35. air inlet pipe; 36. insulation layer. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] In the prior art, some units use steam for direct heating. Although the heating efficiency is high and the equipment is simple, the condensed water from the steam dilutes the solution, which increases the total amount of materials to be processed, increases the workload of subsequent processing, increases energy consumption, and reduces the purity of the ferrous chloride solution. The present application solves the above problems through a hot-dip galvanizing pickling waste acid treatment device, such as Figure 1-Figure 3 As shown, a support frame 1 is provided, a dissolving tank 2 for receiving waste acid liquid is provided at the upper end of the support frame 1, and a waste acid liquid pretreatment device 3 is arranged at the upper end of the dissolving tank 2.

[0026] The dissolving tank 2 includes a tank 21 installed on the support frame 1. The tank 21 is hollow inside and is provided with a reaction tank 22. The upper end of the reaction tank 22 is provided with a plugging plate 23 connected to the top plate of the tank 21. The tank 21 includes a liquid passage 211 and a reaction tank 212. The opening depth of the reaction tank 212 is greater than the opening depth of the liquid passage 211. The reaction tank 22 is arranged in the reaction tank 212. The plugging plate 23 is arranged in the liquid passage 211. The size of the plugging plate 23 is adapted to the liquid passage size of the liquid passage 211 to close the liquid passage 211.

[0027] The reaction tank 22 includes a tank body 221 installed in the reaction pool 212 and a plurality of layers of liquid holes 222 opened on the tank body 221. Filter holes 223 are staggered between adjacent layers of liquid holes 222. Filter plates 225 are filled in the filter holes 223. The sum of the thickness of the filter plates 225 and the depth of the opening of the grooves 224 is equal to the wall thickness of the reaction tank 22. The filter plates 225 filter the impurities after the reaction in the waste acid liquid. The adjacent filter holes 223 are connected by the grooves 224. The grooves 224 connect the plurality of filter plates 225, thereby enhancing the transfer of the waste acid liquid between the filter plates 225.

[0028] like Figure 3 As shown, the reaction tank 22 is rectangular and fills the tank 21 from front to back. The liquid passage 211 is opened horizontally, and the reaction tank 212 is arranged at the lower end of the liquid passage 211 and forms a water-containing cavity. After the liquid passage 211 is blocked by the blocking plate 23, the waste acid liquid can only be collected in the reaction tank 212 to reduce the flow rate, and after passing through the reaction tank 22, it is output from the liquid passage 211 to the dissolution tank 2, thereby enhancing the degree of reaction.

[0029] The waste acid liquid pretreatment device 3 includes a treatment tank 31 installed on the liquid passage 211 and connected to the liquid passage 211. The treatment tank 31 is connected to the liquid passage 211 through a liquid outlet pipe. An overflow pipe 32 is installed on the treatment tank 31. A top cover and a nozzle installed on the top cover are arranged at the upper end of the treatment tank 31. A feed pipe 33 that runs through the top cover is connected to the upper end of the nozzle. The feed pipe 33 introduces the waste acid liquid into the nozzle and evenly sprays it into the treatment tank 31.

[0030] The overflow pipe 32 is installed on the treatment tank 31 in a downwardly inclined shape, and its pipe opening inside the treatment tank 31 is lower than its pipe opening outside the treatment tank 31. On the one hand, it can better adapt to the movement state of the gas from bottom to top after evaporation. On the other hand, when the nozzle sprays the waste acid liquid into the treatment tank 31, the setting of the overflow pipe 32 reduces the stagnation of the waste acid liquid in the overflow pipe 32. A filter plate 34 and iron filings placed on the filter plate 34 are provided in the treatment tank 31. After the waste acid liquid is heated, it contacts the iron filings on the filter plate 34, then falls downward through the filter plate 225, and flows into the liquid channel 211 along the liquid outlet pipe.

[0031] An air inlet pipe 35 for conveying hot air into the processing tank 31 is provided at the lower end of the processing tank 31 and is installed in an upward tilted shape. Its setting position is lower than the installation position of the filter plate 34. When the hot air enters the reaction tank 22, in order to maintain the temperature in the reaction tank 22 and thus reduce the condensation of condensed water, a heat preservation layer 36 is wrapped on the outer wall of the processing tank 31. The setting position of the air inlet pipe 35 is lower than the filter plate 34, so that when the hot air is conveyed from the air inlet pipe 35 to the processing tank 31, the movement path of the hot air gradually moves toward the upper end of the processing tank 31, heating the waste acid liquid sprayed into the processing tank 31, which can increase the waste acid temperature and improve the iron filings dissolution efficiency.

[0032] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot dip galvanizing pickling waste acid treatment device, comprising a support frame (1), characterized in that: The upper end of the support frame (1) is provided with a dissolving tank (2) for receiving the waste acid liquid, and the upper end of the dissolving tank (2) is provided with a waste acid liquid pretreatment device (3); The dissolving tank (2) comprises a tank (21) mounted on a support frame (1); the tank (21) is hollow inside and is provided with a reaction tank (22); a blocking plate (23) connected to a top plate of the tank (21) is provided at the upper end of the reaction tank (22); The tank (21) comprises a liquid passage (211) and a reaction tank (212). The opening depth of the reaction tank (212) is greater than the opening depth of the liquid passage (211). The reaction tank (22) is arranged in the reaction tank (212), and the blocking plate (23) is arranged in the liquid passage (211).

2. A hot dip galvanizing pickling waste acid treatment equipment according to claim 1, characterized in that: The reaction tank (22) comprises a tank body (221) installed in the reaction pool (212) and a plurality of layers of liquid holes (222) provided on the tank body (221), filter holes (223) are staggered between adjacent layers of liquid holes (222), and adjacent filter holes (223) are connected via grooves (224); The filter hole (223) is filled with a filter plate (225), and the sum of the thickness of the filter plate (225) and the depth of the groove (224) is equal to the wall thickness of the reaction tank (22).

3. A hot dip galvanizing pickling waste acid treatment equipment according to claim 1, characterized in that: The waste acid liquid pretreatment device (3) comprises a treatment tank (31) installed on the liquid passage (211) and connected to the liquid passage (211); the treatment tank (31) is connected to the liquid passage (211) via a liquid outlet pipe; an overflow pipe (32) is installed on the treatment tank (31); a top cover and a nozzle installed on the top cover are arranged at the upper end of the treatment tank (31); a feed pipe (33) penetrating the top cover is connected to the upper end of the nozzle; the feed pipe (33) introduces the waste acid liquid into the nozzle and evenly sprays it into the treatment tank (31).

4. A hot dip galvanizing pickling waste acid treatment equipment according to claim 1, characterized in that: The size of the blocking plate (23) is adapted to the size of the liquid passage (211) so as to close the liquid passage (211); The reaction tank (22) is rectangular and fills the tank (21) from front to back.

5. A hot dip galvanizing pickling waste acid treatment equipment according to claim 3, characterized in that: The overflow pipe (32) is installed on the processing tank (31) in an inclined manner, and a filter plate (34) and iron filings placed on the filter plate (34) are arranged in the processing tank (31); The lower end of the processing tank (31) is provided with an air inlet pipe (35), the setting position of which is lower than the installation position of the filter plate (34).

6. A hot dip galvanizing pickling waste acid treatment equipment according to claim 5, characterized in that: The outer wall of the processing tank (31) is provided with a heat-insulating layer (36).

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