An exhaust gas treatment device for a core shooter

Abstract

The utility model relates to a kind of waste gas treatment device for core shooter, it is arranged at the exhaust end of core shooter core box, including washing bin and washing liquid tank being set on washing bin, hierarchical washing mechanism is arranged on the washing bin.This waste gas treatment device for core shooter, by setting hierarchical washing mechanism, significantly improve waste gas purification efficiency, multiple filter screen plates sequentially arranged in mechanism along waste gas flow direction can effectively increase the contact area and contact time of waste gas and washing medium, so that dust, ammonia, formaldehyde and other pollutants in waste gas are fully intercepted, dissolved and reacted, solve the technical problem that gas-liquid contact is not sufficient and reaction time is short in traditional spray tower, shunt pipe cooperates with the first spray pipe and the second spray pipe of different lengths, and multiple equidistant spray heads are arranged thereon, can form multi-level, three-dimensional spray coverage network in washing bin, ensure that washing medium is evenly distributed.

Description

Technical Field

[0001] This utility model relates to the field of core shooting machine technology, specifically to a waste gas treatment device for core shooting machines. Background Technology

[0002] A core shooter is a device used to produce casting molds, especially in sand casting, to create the core of a casting. The core is the part placed inside the mold during the casting process to form the cavity or specific shape of the casting. The core shooter mixes specific sand and binder and uses mechanical force to "shoot" the sand core into the mold cavity to create the required sand core. During the production process, when the core shooter injects molding sand into the mold, it leaks a large amount of dust outwards. Furthermore, during heating, curing, and mold opening, it releases irritating fumes into the air, causing physical discomfort to production workers.

[0003] Currently, the industry mostly uses a single spray scrubbing method to treat exhaust gas from core shooting machines. This often involves using acid to absorb ammonia or alkaline solutions to neutralize some acidic organic compounds. However, traditional spray towers have simple internal structures, resulting in insufficient contact between the exhaust gas and the scrubbing medium and short reaction times. For multi-component, high-concentration exhaust gases, this method often suffers from low purification efficiency, high consumption of scrubbing media, and limited effectiveness in removing VOCs.

[0004] Therefore, a waste gas treatment device for core shooting machines is proposed to solve the aforementioned technical problem of poor waste gas treatment effect. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a waste gas treatment device for core shooting machines, which has the advantage of good treatment effect and solves the problems of insufficient contact between waste gas and washing medium and short reaction time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste gas treatment device for a core shooting machine, which is installed at the exhaust end of the core box of the core shooting machine, including a washing chamber and a washing medium tank installed on the washing chamber, wherein a graded washing mechanism is provided on the washing chamber. The graded washing mechanism includes a plurality of filter screens arranged sequentially along the direction of exhaust gas flow. A diversion pipe is provided at the bottom of the filter screen, a first spray pipe is provided on the diversion pipe, and a second spray pipe is provided on the diversion pipe. Spray heads are provided on the diversion pipe, the first spray pipe, and the second spray pipe facing the direction of exhaust gas flow.

[0007] Furthermore, the number of spray heads is several, and the several spray heads are respectively arranged at equal intervals on the diversion pipe, the first spray pipe and the second spray pipe.

[0008] Furthermore, the length of the first spray pipe is greater than the length of the second spray pipe, and the other end of the diversion pipe passes through the washing chamber and extends to its exterior.

[0009] Furthermore, the washing chamber is connected to the washing medium tank, so that the washed acid solution can be returned to the washing medium tank.

[0010] Furthermore, a circulation module is provided on the outside of the washing medium tank, and the input end of the circulation module is connected to the washing medium tank.

[0011] Furthermore, the output end of the circulation module is connected to an infusion tube, which is connected to a shunt tube.

[0012] Furthermore, an air inlet is provided on the outer side of the washing chamber and near its lower part, and an exhaust port is provided on the top of the washing chamber; The medium in the washing medium tank can be any one of acid, alkali, or water.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The exhaust gas treatment device for the core shooting machine significantly improves the exhaust gas purification efficiency by setting up a graded washing mechanism. The multiple filter screens arranged sequentially along the exhaust gas flow direction can effectively increase the contact area and contact time between the exhaust gas and the washing medium, so that pollutants such as dust, ammonia, and formaldehyde in the exhaust gas are fully intercepted, dissolved, and reacted, solving the technical problems of insufficient gas-liquid contact and short reaction time in traditional spray towers.

[0014] 2. The exhaust gas treatment device for the core shooting machine achieves efficient utilization of the washing medium by optimizing the layout of the spray system. The diversion pipe is combined with the first and second spray pipes of different lengths, and multiple spray heads with equal spacing are set on them. This can form a multi-layer, three-dimensional spray coverage network in the washing chamber, ensuring uniform distribution of the washing medium and avoiding washing dead corners. Thus, while ensuring the purification effect, the consumption of washing medium is reduced.

[0015] 3. The waste gas treatment device for the core shooting machine realizes the recycling of the washing medium through the circulation module, which is economical and environmentally friendly. The washed liquid can be returned to the washing medium tank and then transported back to the spray system through the circulation pump and the liquid delivery pipe, realizing the recycling of acid or alkali solution. This reduces wastewater discharge and chemical reagent consumption, and also lowers the operating cost of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the washing chamber structure in this utility model; Figure 3 This is a schematic diagram of the overall structure of the graded washing mechanism in this utility model; Figure 4 This is a front view of the connection structure between the first spray pipe, the second spray pipe, and the spray head in this utility model; Figure 5 This is a bottom view of the connection structure of the diversion pipe, the first spray pipe, and the second spray pipe in this utility model.

[0017] In the diagram: 100, washing chamber; 200, washing medium tank; 300, graded washing mechanism; 301, filter screen; 302, diversion pipe; 303, first spray pipe; 304, second spray pipe; 305, spray head; 306, circulation module; 307, infusion pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0019] Please see Figure 1-2 and Figure 5 This embodiment provides a waste gas treatment device for a core shooting machine, which is installed at the exhaust end of the core shooting machine core box. It includes a washing chamber 100 and a washing medium tank 200 installed on the washing chamber 100. The feature is that the washing chamber 100 is provided with a graded washing mechanism 300. It should be noted that the core shooting machine in this application is a common device in the prior art, and the usage method and working principle of the core shooting machine are well known to those skilled in the art of core shooting machines, and will not be described in detail in this application.

[0020] Specifically, the washing chamber 100 is connected to the washing medium tank 200, so that the acid solution after washing can be returned to the washing medium tank 200.

[0021] It should be noted that the connection between the washing chamber 100 and the washing medium tank 200 enables the recycling of the washing medium and the continuous operation of the system. Specifically, the used washing medium after spraying and washing the exhaust gas will be pumped back to the washing medium tank 200 under gravity or through a specific return pipeline, thus realizing the recycling of the washing medium. This significantly reduces the amount of fresh chemical reagents needed and the amount of industrial wastewater discharged, thereby reducing operating costs and alleviating the environmental burden.

[0022] An air inlet is provided on the outer side of the washing chamber 100 near its lower part, and an exhaust port is provided on the top of the washing chamber 100; The medium in the washing medium tank 200 can be any one of acid, alkali or water.

[0023] Understandably, the exhaust gas enters from the bottom of the scrubbing chamber 100 and must flow upward against gravity in order to finally be discharged from the exhaust port at the top. This upward process forcibly prolongs the residence time of the exhaust gas in the chamber. A longer residence time means that the exhaust gas has more opportunities to fully contact, react and be absorbed by the scrubbing media droplets sprayed from top to bottom, thereby significantly improving the removal efficiency of pollutants. Acid solution: When the core shooter uses furan resin to generate a large amount of ammonia, acid solution is selected as the medium. Through acid-base neutralization reaction, ammonia can be efficiently and thoroughly converted into stable ammonium salts, with high removal efficiency. Alkaline solution: When the content of acidic organic matter such as phenols in the exhaust gas is high, alkaline solution can be used. Alkaline solution can neutralize phenols and generate sodium phenolate, which is easily soluble in water, thereby effectively removing them.

[0024] Water: When the main pollutants in the exhaust gas are water-soluble substances or the main purpose is to cool down or remove dust, water can be used as a medium, which is economical and convenient.

[0025] The graded washing mechanism 300 includes a plurality of filter screens 301 arranged sequentially along the exhaust gas flow direction. A diversion pipe 302 is provided at the bottom of the filter screen 301. A first spray pipe 303 is provided on the diversion pipe 302. A second spray pipe 304 is provided on the diversion pipe 302. Spray heads 305 are provided on the diversion pipe 302, the first spray pipe 303 and the second spray pipe 304 facing the exhaust gas flow direction.

[0026] In application, the high-temperature exhaust gas generated by the core shooting mechanism box first enters the washing chamber 100 through the air inlet at the bottom. Since the air inlet is located at the bottom, the exhaust gas naturally flows upward. This process slows down its flow rate and initially diffuses it within the chamber, preparing it for subsequent uniform treatment. The upward-flowing exhaust gas first encounters several filter screens 301 arranged sequentially along the exhaust gas flow direction in the graded washing mechanism 300. Larger dust particles in the exhaust gas are directly intercepted and captured when they collide with and pass through the filter screens 301. The washing medium in the diversion pipe 302 is diverted to the first spray pipe 303 and the second spray pipe 304, and finally sprayed out through the numerous spray heads 305 arranged on them. This makes the spray area cover different cross-sectional areas of the washing chamber 100, forming a three-dimensional, intersecting spray network without dead angles, ensuring that the exhaust gas can be fully mixed with the washing medium no matter where it flows. Example

[0027] The basic content is the same as in Example 1, except that: Please see Figure 3-5 In this embodiment, the length of the first spray pipe 303 is greater than the length of the second spray pipe 304, and the other end of the diversion pipe 302 passes through the washing chamber 100 and extends to its outside.

[0028] The washing chamber 100 is connected to the washing medium tank 200, and is used to return the washed acid solution to the washing medium tank 200.

[0029] A circulation module 306 is provided on the outside of the washing medium tank 200, and the input end of the circulation module 306 is connected to the washing medium tank 200.

[0030] The output end of the circulation module 306 is connected to the infusion tube 307, and the infusion tube 307 is connected to the diversion tube 302.

[0031] It should be noted that the circulation module 306 includes, but is not limited to, any one of a circulation pump and a pressurizing pump. The circulation module 306 is connected to the control unit, which controls the start and stop of the circulation module 306. The control unit and its working principle are well known to those skilled in the art, and will not be described in this embodiment.

[0032] During application, the circulation module 306 is activated, and its input end draws the stored washing medium from the washing medium tank 200. After being pressurized by the pump, the washing medium is discharged from the output end of the circulation module 306 and enters the infusion pipe 307. The infusion pipe 307 delivers the pressurized washing medium to the diversion pipe 302 that runs through the washing chamber 100. After entering the diversion pipe 302, the washing medium is diverted to the first spray pipe 303. The first spray pipe 303 is longer than the second spray pipe 304, which allows the two spray pipes to cover areas of different radii on the cross-section of the washing chamber 100, forming a three-dimensional spray network with a wider coverage and a more reasonable layout. The pressurized washing medium is finally sprayed out at high speed in the opposite direction through numerous spray heads 305 that are equally spaced on the spray pipe, and is atomized into countless tiny droplets. The exhaust gas enters the high-density droplet area formed by the three-dimensional spray network. Since the spraying is in the opposite direction, the exhaust gas and the washing medium droplets undergo violent opposing collisions, contact and mixing.

[0033] In summary, the working principle of this exhaust gas treatment device for the core shooting machine is as follows: The high-temperature exhaust gas generated by the core-shooting mechanism box first enters the washing chamber 100 through the air inlet at the bottom. Since the air inlet is located at the bottom, the exhaust gas naturally flows upward. This process slows down its flow rate and initially diffuses it within the chamber, preparing it for subsequent uniform treatment. The upward-flowing exhaust gas first encounters several filter screens 301 arranged sequentially along the exhaust gas flow direction in the graded washing mechanism 300. Larger dust particles in the exhaust gas are directly intercepted and captured when they collide with and pass through the filter screens 301. The washing medium is pumped out from the washing medium tank 200 through the circulation module 306 and transported to the diversion pipe 302 through the delivery pipe 307. The washing medium in the diversion pipe 302 is diverted to the first spray pipe 303 and the second spray pipe 304, and finally sprayed out through the numerous spray heads 305 arranged on them. This makes the spray area cover different cross-sectional areas of the washing chamber 100, forming a three-dimensional, cross-shaped spray network without dead angles, ensuring that the exhaust gas can be fully mixed with the washing medium no matter where it flows.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A waste gas treatment device for a core shooter, disposed at the exhaust end of the core box of the core shooter, comprising a washing chamber (100) and a washing medium tank (200) disposed on the washing chamber (100), characterized in that: The washing chamber (100) is equipped with a graded washing mechanism (300). The graded washing mechanism (300) includes a plurality of filter screens (301) arranged sequentially along the exhaust gas flow direction. A diversion pipe (302) is provided at the bottom of the filter screen (301). A first spray pipe (303) is provided on the diversion pipe (302). A second spray pipe (304) is provided on the diversion pipe (302). Spray heads (305) are provided on the diversion pipe (302), the first spray pipe (303) and the second spray pipe (304) facing the exhaust gas flow direction.

2. The waste gas treatment device for a core shooter according to claim 1, characterized in that: The number of spray heads (305) is several, and the several spray heads (305) are respectively arranged at equal intervals on the diversion pipe (302), the first spray pipe (303) and the second spray pipe (304).

3. The waste gas treatment device for a core shooter according to claim 1, characterized in that: The length of the first spray pipe (303) is greater than the length of the second spray pipe (304), and the other end of the diversion pipe (302) passes through the washing chamber (100) and extends to its exterior.

4. The waste gas treatment device for a core shooter according to claim 1, characterized in that: The washing chamber (100) is connected to the washing medium tank (200) and is used to return the washed acid solution to the washing medium tank (200).

5. The waste gas treatment device for a core shooter according to claim 1, characterized in that: A circulation module (306) is provided on the outside of the washing medium tank (200), and the input end of the circulation module (306) is connected to the washing medium tank (200).

6. The waste gas treatment device for a core shooter according to claim 5, characterized in that: The output end of the circulation module (306) is connected to an infusion tube (307), which is connected to a diversion tube (302).

7. The waste gas treatment device for a core shooter according to claim 1, characterized in that: An air inlet is provided on the outside of the washing chamber (100) and near its lower part, and an exhaust port is provided on the top of the washing chamber (100); The medium in the washing medium tank (200) is any one of acid, alkali, or water.

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