Hot galvanizing waste acid treatment equipment

Abstract

The utility model relates to the technical field of waste acid treatment equipment, and provides hot galvanizing waste acid treatment equipment which comprises a tank body and an evaporation assembly arranged in an inner cavity of the tank body to evaporate waste acid, the top of the tank body is provided with a tail gas treatment assembly for treating acid gas, and the tail gas treatment assembly comprises a containing cavity formed in the top of the tank body. A containing cavity is formed in the top of the tank body, alkali liquor is arranged in the containing cavity, a U-shaped communicating pipe communicated with an inner cavity of the tank body is arranged in the containing cavity, a plurality of baffle plates are arranged at the top of the tank body and located above the containing cavity, and the baffle plates are provided with air outlets for water vapor to rise and liquid overflow holes for guiding liquid downwards. According to the waste acid treatment device, waste acid is treated through the evaporation assembly, acidic substances in water vapor are neutralized through the arrangement of the tail gas treatment assembly, so that the environment and a tail gas pipeline are protected, in addition, the dehumidification capacity of the device on overflowing airflow is improved, and the service time of alkali liquor is prolonged through the arrangement of elements such as a baffle plate.

Description

Technical Field

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

[0002] During the hot-dip galvanizing pickling process, as the pickling operation continues, the concentration of the pickling solution continues to decrease. When the concentration of the pickling solution is lower than the specified value, it will become waste acid. According to national environmental protection regulations, these waste acids need to be treated before they can be discharged. The existing waste acid is mainly separated from the water and hydrochloric acid in the waste acid by high-temperature evaporation, and the solid ferrous chloride is heated and decomposed to produce ferric oxide and hydrochloric acid, thereby achieving the function of waste acid treatment.

[0003] However, during the evaporation process, hydrogen chloride may evaporate into gas due to heat and be discharged along with the water vapor. Since hydrogen chloride gas is an acidic gas, its discharge into the atmosphere will damage the atmospheric environment and cause certain corrosion to the evaporation pipe. Utility Model Content

[0004] The utility model aims to solve the shortcoming that the gas generated during the existing hot-dip galvanizing waste acid treatment may damage the pipeline and the atmospheric environment, and proposes a hot-dip galvanizing waste acid treatment device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hot dip galvanizing waste acid treatment device comprises a tank body and an evaporation component arranged in the tank body cavity for evaporating the waste acid, and a tail gas treatment component for treating acidic gas is arranged on the top of the tank body;

[0007] The exhaust gas treatment component includes a holding chamber arranged on the top of the tank body, an alkali solution is arranged in the holding chamber, a U-shaped connecting pipe connected to the inner cavity of the tank body is arranged in the holding chamber, a plurality of baffles are arranged on the top of the tank body and above the holding chamber, and an air outlet for water vapor to rise and an overflow hole for guiding liquid downward are arranged on the baffles.

[0008] Preferably, the baffle is arranged obliquely in the tank body, the air outlet is arranged in the middle of the baffle, and the overflow hole is arranged at the lowest end of the baffle.

[0009] Preferably, a conical cavity is provided in the connecting tube, and the inner size of the conical cavity increases from top to bottom. A movable sphere is provided in the conical cavity, and the movable sphere is a hollow structure.

[0010] Preferably, an indicator assembly for detecting the usage time of the alkali solution is provided on the top of the tank body, and the indicator assembly includes an indicator sleeve mounted on the tank body, and a plurality of activated carbon filter plates are detachably installed inside the indicator sleeve. A mounting bolt threadedly connected to the tank body is provided between the indicator sleeve and the tank body, and a bearing rod is slidably installed on the tank body, and the upper part of the bearing rod is in contact with the indicator sleeve, and the lower part is provided with a bearing spring fixed to the tank body.

[0011] Preferably, the evaporation component comprises a heating chamber arranged in an inner interlayer of the tank body, a heating resistance wire is arranged in the heating chamber, and a discharge port is arranged at the bottom of the tank body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model realizes the treatment of waste acid through the evaporation component, and utilizes the setting of the tail gas treatment component to neutralize the acidic substances in the water vapor, thereby protecting the environment and the tail gas pipeline. In addition, the setting of components such as baffles improves the dehumidification capacity of the equipment for the overflow airflow and prolongs the use time of the alkali solution.

[0014] 2. The utility model can intuitively monitor the usage time of the alkali solution in the containing chamber by setting the indicating component, so that the staff can replace the alkali solution in time, thereby proving the treatment effect of the equipment on the acidic substances in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a front cross-sectional view of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0018] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of area B in the middle.

[0019] In the figure: 1. tank body; 2. evaporation component; 21. heating chamber; 22. heating resistor wire; 23. discharge port; 3. exhaust gas treatment component; 31. holding chamber; 32. connecting pipe; 33. baffle; 34. gas outlet; 35. overflow hole; 36. indication component; 361. indication sleeve; 362. activated carbon filter plate; 363. mounting bolts; 364. load-bearing rod; 365. load-bearing spring; 37. conical chamber; 38. movable sphere. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the hot-dip galvanizing production process, the generation of waste acid is inevitable. If the heavy metal ions, iron ions and other harmful substances contained in the waste acid are discharged directly without treatment, it will have a serious impact on the environment and human health. Many factories use high-temperature evaporation to treat waste acid, mainly by separating the water and hydrochloric acid in the waste acid through high-temperature evaporation, and heating and decomposing solid ferrous chloride to produce ferric oxide and hydrochloric acid. This method can recycle hydrochloric acid and reduce the generation of waste slag, but because acidic gases are easily volatilized by heat, the discharged gases may cause damage to the environment and exhaust pipes.

[0022] Embodiment 1

[0023] The gas produced during the existing hot-dip galvanizing waste acid treatment may cause damage to the pipeline and the atmospheric environment. Figure 1-Figure 4 This embodiment proposes a hot-dip galvanizing waste acid treatment device, which realizes the neutralization of acidic substances in the overflow gas flow and protects the environment and the tail gas pipeline. It mainly consists of a tank body 1 and an evaporation component 2 arranged in the inner cavity of the tank body 1 to evaporate the waste acid. The top of the tank body 1 is provided with a tail gas treatment component 3 for treating acidic gas. Figure 1 As shown, a feed pipe is provided on one side of the tank body 1. During treatment, the waste acid liquid can enter the inner cavity of the tank body 1 through the feed pipe, and then the feed pipe is closed. The waste acid is heated by the evaporation component 2, so that the moisture is converted into water vapor and separated from the waste acid, and the remaining acid liquid and solid crystals are discharged after the treatment is completed. In addition, the exhaust gas treatment component 3 arranged on the top of the tank body 1 will process the discharged water vapor and absorb the acidic substances contained therein, so as to achieve the effect of protecting the environment and the pipeline.

[0024] In order to treat the acidic substances in the overflow gas flow, this embodiment proposes a tail gas treatment component 3, which protects the environment and the tail gas pipeline by neutralizing the acidic substances in the water vapor. Figure 2As shown, the exhaust gas treatment component 3 includes a holding chamber 31 arranged on the top of the tank body 1, an alkali solution is arranged in the holding chamber 31, a U-shaped connecting pipe 32 connected to the inner cavity of the tank body 1 is arranged in the holding chamber 31, and a plurality of baffles 33 are arranged on the top of the tank body 1 and above the holding chamber 31, and an air outlet 34 for water vapor to rise and an overflow hole 35 for guiding liquid downward are provided on the baffle 33. When the waste acid is treated, the water vapor generated by it will gather at the top of the tank body 1 and enter the holding chamber 31 along the connecting pipe 32, and the acidic substance contained therein will react with the alkali solution in the holding chamber 31 to neutralize the acidic substance, so as to achieve the purpose of removing the acidic substance, and the remaining gas will overflow from the holding chamber 31 and contact the baffle 33, and the liquid entrained by the air flow in the holding chamber 31 will be adsorbed on the baffle 33 and return to the holding chamber 31 along the overflow hole 35, thereby avoiding the alkaline substance from polluting the environment and prolonging the use time of the alkali solution.

[0025] The baffle 33 is tilted in the tank body 1, and the air outlet 34 is arranged in the middle of the baffle 33, and the overflow hole 35 is arranged at the lowest end of the baffle 33. Figure 4 As shown, the two baffles 33 and the inner cavity of the tank body 1 form a triangular dehumidification space. After the airflow enters the dehumidification space, it will first flow to the highest point of the dehumidification space. When it is found that the highest point of the dehumidification space is closed, the airflow will flow back to find an overflow channel. In this process, the liquid components in the airflow will gather at the top of the baffle 33, and as the amount of gathering increases, the liquid will flow downward along the inner wall of the tank body 1 until it flows into the containing chamber 31 from the overflow hole 35. This arrangement increases the dehumidification effect of the equipment on the overflow airflow.

[0026] A conical cavity 37 is provided in the connecting tube 32, and the internal size of the conical cavity 37 increases from top to bottom. A movable sphere 38 is provided in the conical cavity 37, and the movable sphere 38 is a hollow structure. Since the movable sphere 38 is hollow and the internal size of the conical cavity 37 increases from top to bottom, the movable sphere 38 in the connecting tube 32 will close the connecting tube 32 under the action of buoyancy to prevent alkali solution from entering the tank body 1. When the waste acid is treated, the water vapor generated will squeeze the movable sphere 38 to move downward, thereby releasing the restriction on the connecting tube 32, so that the airflow in the tank body 1 enters the containing cavity 31 for neutralization operation.

[0027] Embodiment 2

[0028] On the basis of the first embodiment, the technical solution proposed in the first embodiment is used to solve the disadvantage that the gas generated during the existing hot-dip galvanizing waste acid treatment may damage the pipeline and the atmospheric environment. However, as the number of treatments increases, the alkaline components in the containing chamber 31 will become lower and lower, and the acidic substances in the airflow will gradually fail to be treated.

[0029] Reference Figure 1-Figure 4 The top of the tank body 1 is provided with an indicator assembly 36 for detecting the use time of the alkali solution. The indicator assembly 36 includes an indicator sleeve 361 sleeved on the tank body 1. A plurality of activated carbon filter plates 362 are detachably installed inside the indicator sleeve 361. A mounting bolt 363 threadedly connected to the tank body 1 is provided between the indicator sleeve 361 and the tank body 1. A bearing rod 364 is slidably installed on the tank body 1, and the upper part of the bearing rod 364 contacts the indicator sleeve 361, and the lower part is provided with a bearing spring 365 fixedly connected to the tank body 1. In this embodiment, By setting the indicating component 36, the usage time of the alkali solution can be monitored so that it can be replaced in time. When the amount of acidic substances neutralized by the alkali solution decreases, these acidic substances will enter the indicating sleeve 361 and be absorbed by the activated carbon filter plate 362. As the absorption time increases, the weight of the indicating sleeve 361 will increase, and then it will press the bearing rod 364 to move downward, thereby reminding the staff to replace the alkali solution and the activated carbon filter plate 362 in time, thereby ensuring the treatment effect of the equipment on the acidic substances in the exhaust gas.

[0030] The evaporation component 2 includes a heating chamber 21 arranged in the inner layer of the tank body 1, a heating resistance wire 22 is arranged in the heating chamber 21, and a discharge port 23 is arranged at the bottom of the tank body 1. When treating the waste acid, the inner cavity of the tank body 1 is first heated by starting the heating resistance wire 22. After the waste acid in the inner cavity of the tank body 1 is heated, the volatilization of its internal moisture will be accelerated. After the evaporation is completed, the solid crystals and the acid liquid are discharged from the discharge port 23, and then these crystals can be separated from the acid liquid by physical methods such as cooling and filtration, thereby completing the treatment of the acid liquid.

[0031] 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 waste acid treatment device, comprising a tank body (1), and an evaporation component (2) arranged in the inner cavity of the tank body (1) for evaporating the waste acid, characterized in that: The top of the tank body (1) is provided with a tail gas treatment component (3) for treating acidic gas; The tail gas treatment assembly (3) comprises a containing chamber (31) arranged at the top of the tank body (1), wherein an alkali solution is arranged in the containing chamber (31), wherein a U-shaped connecting pipe (32) communicating with the inner chamber of the tank body (1) is arranged in the containing chamber (31), and wherein a plurality of baffles (33) are arranged at the top of the tank body (1) and above the containing chamber (31), wherein the baffles (33) are provided with an air outlet (34) for water vapor to rise and an overflow hole (35) for guiding liquid downward.

2. A hot dip galvanizing waste acid treatment equipment according to claim 1, characterized in that: The baffle (33) is arranged obliquely in the tank body (1), the air outlet (34) is arranged in the middle of the baffle (33), and the overflow hole (35) is arranged at the lowest end of the baffle (33).

3. A hot dip galvanizing waste acid treatment equipment according to claim 1, characterized in that: A conical cavity (37) is provided in the connecting pipe (32), and the internal size of the conical cavity (37) increases in order from top to bottom. A movable ball (38) is provided in the conical cavity (37), and the movable ball (38) is a hollow structure.

4. A hot dip galvanizing waste acid treatment equipment according to claim 1, characterized in that: The top of the tank body (1) is provided with an indicator assembly (36) capable of detecting the usage time of the alkali solution. The indicator assembly (36) comprises an indicator sleeve (361) sleeved on the tank body (1), a plurality of activated carbon filter plates (362) are detachably mounted inside the indicator sleeve (361), and a mounting bolt (363) threadedly connected to the tank body (1) is provided between the indicator sleeve (361) and the tank body (1).

5. A hot dip galvanizing waste acid treatment equipment according to claim 4, characterized in that: A bearing rod (364) is slidably mounted on the tank body (1), and the upper portion of the bearing rod (364) is in contact with the indicating sleeve (361), while the lower portion is provided with a bearing spring (365) fixedly connected to the tank body (1).

6. A hot dip galvanizing waste acid treatment equipment according to claim 1, characterized in that: The evaporation component (2) comprises a heating chamber (21) arranged in the inner cavity interlayer of the tank body (1), a heating resistance wire (22) is arranged in the heating chamber (21), and a discharge port (23) is arranged at the bottom of the tank body (1).

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