Centralized treatment equipment for acidic waste gas in steel processing

Abstract

The utility model discloses steel processing acid waste gas centralized treatment equipment which comprises an acid pickling tank, a partition plate is fixed in the acid pickling tank and divides an inner cavity of the acid pickling tank into an acid pickling cavity and a gas washing cavity which are independent, a first through hole is formed in one side of the acid pickling cavity, and a second through hole is formed in the partition plate. A sealing plate capable of sliding to the second penetrating hole is slidably connected to the first penetrating hole, a motor is fixed to one end of the pickling tank, the output end of the motor is in driving connection with a screw rod, the screw rod is in threaded connection with the sealing plate, an air pump is fixed to the top end of the sealing plate, and the input end of the air pump is communicated into the pickling cavity; the output end of the air pump is communicated with the air distribution pipe through a pipeline, a spraying pipe is fixed to the position, above the air distribution pipe, in the air washing cavity, a pump body is fixed to one side of the pickling tank, the input end of the pump body is communicated with the interior of the air washing cavity, the pump body is communicated with the spraying pipe, and a liquid inlet communicated with the interior of the air washing cavity is formed in one side of the pickling tank. The device can prevent acid gas from escaping, and can carry out centralized and rapid treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel production equipment, and particularly relates to an acid waste gas centralized treatment device for steel processing. Background Art

[0002] Stainless steel is a kind of decorative material with a light brightness close to that of a mirror surface, a hard and cold touch, and is relatively avant-garde. It has excellent corrosion resistance, formability, compatibility, and toughness, etc., and is used in heavy industry, light industry, daily necessities industry, and building decoration industries.

[0003] In the production process of stainless steel, it is inevitable to go through processing processes such as annealing, normalizing, quenching, and welding, and black scale will often be generated on the surface. The scale not only affects the appearance quality of stainless steel but also has an adverse effect on the subsequent processing of the product. Therefore, before subsequent processing, surface treatment methods such as pickling and polishing must be used to remove it. In the production line of the stainless steel production workshop, pickling operation is carried out. First, the steel removes the oxide film on the wire surface through hydrochloric acid, and then forms an insoluble compound film using phosphate to avoid wearing the mold during subsequent processing and protect the processing equipment. The pickling solution for the pickling process is generally a mixture of multiple acids, mainly sulfuric acid, nitric acid, and hydrofluoric acid, etc. These mixed acids are highly corrosive, and at the same time have strong oxidizing properties and a relatively high temperature of the corrosive medium. The main components of the scale generated on the stainless steel surface are dense oxides such as Fe0, Fe203, Ni0, Cr203, Fe304, Fe0·Cre03, Ni·Fe203, Fe0·Cr203·Fe203, etc. When the steel enters the pickling device, the scale reacts chemically with the acid solution. While cleaning the scale on the steel surface, a large amount of acid gas will be generated. If directly discharged into the air, it will pollute the air. Therefore, it is very necessary to design a pickling waste gas treatment device that can avoid acid gas leakage and reliably treat acid gas. Summary of the Utility Model

[0004] The purpose of this application is to provide an acid waste gas centralized treatment device for steel processing to solve the problems raised in the above background art.

[0005] To achieve the above object, the present application provides the following technical solutions: An acidic waste gas centralized treatment device for steel processing, including a pickling tank. A partition is fixedly installed inside the pickling tank to divide its inner cavity into an independent pickling chamber and a gas washing chamber. A first perforation is provided on one side of the pickling chamber, and a second perforation is provided on the partition. A sealing plate that can slide to the second perforation is slidably connected at the first perforation. A motor is fixedly installed at one end of the pickling tank, and the output end of the motor is drivingly connected to a screw rod. The screw rod is threadedly connected to the sealing plate. A gas pump is fixedly installed at the top end of the sealing plate, and the input end of the gas pump leads into the pickling chamber. A horizontally arranged air distribution pipe is fixedly installed inside the gas washing chamber, and the output end of the gas pump is communicated with the air distribution pipe through a pipeline. A spray pipe is fixedly installed above the air distribution pipe inside the gas washing chamber. A pump body is fixedly installed on one side of the pickling tank, and the input end of the pump body leads into the inside of the gas washing chamber. The output end of the pump body is communicated with the spray pipe. An inlet for liquid is provided on one side of the pickling tank and is communicated with the inside of the gas washing chamber. Preferably,

[0006] Sealing rings adapted to be sealed with the outer walls of both ends of the sealing plate are fixedly installed on the inner walls of the first perforation and the second perforation.

[0007] Preferably, an air outlet is provided at the top end of the gas washing chamber.

[0008] Preferably, a water-blocking and air-permeable membrane is fixedly installed above the spray pipe inside the gas washing chamber.

[0009] Preferably, a drain port communicated with the inside thereof is provided on one side at the bottom end of the gas washing chamber.

[0010] Preferably, a detachable cover plate is provided at the top end of the gas washing chamber.

[0011] In summary, the technical effects and advantages of the present utility model are as follows:

[0012] In the present utility model, the motor drives the screw rod to rotate to drive the sealing plate to open or close the pickling chamber. The acidic gas generated by pickling the steel in the pickling chamber is intercepted inside and is pumped by the gas pump into the air distribution pipe in the gas washing chamber and discharged. The absorption liquid in the gas washing chamber is pumped by the pump body and sprayed from the spray pipe to absorb the acid gas, realizing centralized and leak-free treatment, avoiding environmental pollution, and realizing the integration of steel pickling and waste gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 This is a schematic cross-sectional structure diagram of an acid waste gas centralized treatment device for steel processing in an embodiment of the present application;

[0015] Figure 2 This is a schematic top view structure diagram of an acid waste gas centralized treatment device for steel processing in an embodiment of the present application.

[0016] In the figure: 1, pickling tank; 2, pickling chamber; 3, gas washing chamber; 4, partition board; 5, sealing plate; 6, motor; 7, screw rod; 8, first perforation; 9, second perforation; 10, air pump; 11, spray pipe; 12, air distribution pipe; 13, air outlet; 14, sealing ring; 15, pump body; 16, liquid discharge port; 17, liquid inlet port. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0018] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] It should also be noted that the standard parts used in this application document can all be purchased from the market, and can also be customized according to the records in the description and the drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations, and without clear limitations, mechanical parts and equipment can all adopt conventional models in the prior art.

[0020] In this text, the term "comprising" is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the said element.

[0021] Example: Refer to Figure 1-2 A centralized treatment equipment for acidic waste gas in steel processing as shown, which includes a pickling tank 1. A partition is fixedly installed inside the pickling tank 1 to divide its inner cavity into an independent pickling chamber 2 and a gas washing chamber 3. A first perforation 8 is provided on one side of the pickling chamber 2, and a second perforation 9 is provided on the partition 4. A sealing plate 5 that can slide to the second perforation 9 is slidably connected at the first perforation 8. One end of the pickling tank 1 is fixedly installed with a motor 6, and the output end of the motor 6 is drivingly connected with a screw rod 7. The screw rod 7 is threadedly connected with the sealing plate 5. The top end of the sealing plate 5 is fixedly installed with an air pump 10, and the input end of the air pump 10 leads into the pickling chamber 2. A horizontally arranged air distribution pipe 12 is fixedly installed inside the gas washing chamber 3, and the output end of the air pump 10 is communicated with the air distribution pipe 12 through a pipeline. A spray pipe 11 is fixedly installed above the air distribution pipe inside the gas washing chamber 3. One side of the pickling tank 1 is fixedly installed with a pump body 15, the input end of the pump body 15 leads into the inside of the gas washing chamber 3, and the output end of the pump body 15 is communicated with the spray pipe 11. An inlet 17 communicating with the inside of the gas washing chamber is provided on one side of the pickling tank 1. By driving the screw rod to rotate by the motor to drive the sealing plate to open or close the pickling chamber, the acidic gas generated during the pickling of the steel in the pickling chamber is intercepted inside and is pumped by the air pump to the air distribution pipe in the gas washing chamber for discharge. The absorption liquid in the gas washing chamber is pumped by the pump body and sprayed from the spray pipe for absorbing the acid gas, realizing centralized leak-free treatment, avoiding environmental pollution, and integrating the pickling of steel and the treatment of waste gas. When it is necessary to put steel for pickling, the motor drives the screw rod to rotate, and the sealing plate slides towards the first perforation direction to expose the pickling tank, facilitating feeding.

[0022] With the above structure: Sealing rings 14 that are adapted to seal the outer walls at both ends of the sealing plate 5 are fixedly installed on the inner walls of the first perforation 8 and the second perforation 9 to avoid leakage of acid gas.

[0023] With the above structure: An air outlet 13 is provided at the top end of the gas washing chamber 3 to facilitate the discharge of the gas after pickling.

[0024] With the above structure: A water-blocking and air-permeable membrane is fixedly installed above the spray pipe inside the gas washing chamber 3 to reduce the discharge of the absorption liquid.

[0025] With the above structure: One side of the bottom end of the scrubbing chamber 3 is provided with a liquid discharge port 16 communicating with its interior.

[0026] With the above structure: The top end of the scrubbing chamber 3 is provided with a detachable cover plate.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A centralized treatment device for acid waste gas from steel processing, comprising a pickling tank, characterized in that: A partition is fixedly installed inside the pickling tank to divide its inner cavity into an independent pickling chamber and a gas washing chamber, a first through-hole is provided on one side of the pickling chamber, a second through-hole is provided on the partition, a sealing plate that can slide to the second through-hole is slidably connected to the first through-hole, a motor is fixedly installed at one end of the pickling tank, a screw is driven and connected to the output end of the motor, the screw and the sealing plate are threadedly connected, an air pump is fixedly installed on the top of the sealing plate, the input end of the air pump passes into the pickling chamber, a horizontal air distribution pipe is fixedly installed inside the gas washing chamber, the output end of the air pump is connected to the air distribution pipe through a pipeline, a spray pipe is fixedly installed inside the gas washing chamber above the air distribution pipe, a pump body is fixedly installed on one side of the pickling tank, the input end of the pump body passes into the interior of the gas washing chamber, the output end of the pump body is connected to the spray pipe, and a liquid inlet connected to the interior of the gas washing chamber is provided on one side of the pickling tank.

2. The centralized treatment equipment for acidic waste gas from steel processing according to claim 1 is characterized by: The inner walls of the first through hole and the second through hole are fixedly mounted with sealing rings adapted to seal with the outer walls at both ends of the sealing plate.

3. The centralized treatment equipment for acidic waste gas from steel processing according to claim 1 is characterized by: An air outlet is arranged at the top of the air washing cavity.

4. The centralized treatment equipment for acidic waste gas from steel processing according to claim 1 is characterized by: A water-blocking and breathable membrane is fixedly installed inside the air washing cavity above the spray pipe.

5. The centralized treatment equipment for acidic waste gas from steel processing according to claim 1 is characterized by: A liquid discharge port communicating with the interior of the air washing cavity is provided on one side of the bottom end of the air washing cavity.

6. The centralized treatment equipment for acidic waste gas from steel processing according to claim 1 is characterized by: The top of the air washing chamber is provided with a detachable cover plate.

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