Large casting casting and box stripping flue gas collection and treatment system
By setting up partition mechanisms and air supply devices in the factory, the problem of difficulty in collecting flue gas during casting and unboxing of large castings is solved, efficient flue gas treatment and environmental improvement are achieved, energy consumption is reduced, and workers' health is protected.
Patent Information
- Application Number
- CN202422670598.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-01
AI Technical Summary
The smoke and VOCs generated during casting and unboxing of large castings are difficult to effectively collect and process, resulting in the flue gas in the factory, affecting the working environment and workers' health, and the existing roof exhaust efficiency is low and energy consumption is high.
The factory is divided into smoke exhaust module by using partition mechanism, combined with the air supply device to control the direction of the flue gas, and the fixed partition plate and quick roller shutter plate are used for partition management, and the flue gas is collected and processed through the air collection cover, exhaust branch pipe, air supply duct and fan system.
Effectively reduce air exhaust, save energy, ensure flue gas enters the roof exhaust hood, improve the working environment, improve exhaust efficiency, and protect workers' health.
Smart Images
Figure CN223288984U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of casting, and relates to a fume collection and treatment system for casting and box-taking off large castings. Background Art
[0002] Casting, a critical component of the industrial production process, generates significant amounts of dust and VOCs, typically accounting for 3-5% of the casting's weight. These dust and VOCs are collected and treated uniformly via purification equipment to ensure the on-site working environment meets national environmental emission standards and protect the health of workers. For large and extra-large castings, production areas are vast, processes are dispersed, and limited by process conditions. Forming, pouring, and stripping are typically performed in pits. Traditional methods for collecting and treating casting dust and nitrogen oxides result in significant spillage of dust and odor.
[0003] The research, development, and application of technologies and complete equipment for dust control during large casting pouring and unloading flasks not only improve the workplace environment and air quality, enhancing worker comfort, but also conserve energy and reduce environmental pollution. The recovery and purification of dust and VOCs during large casting pouring and unloading flasks ensures that dust concentrations and VOC emissions on the job site meet national emission standards, safeguarding the physical and mental health of workers.
[0004] During the pouring and unmolding process of large castings, thick smoke and dust, along with resin and other binders in the sand, emerge from the sand mold after being unmolded at the sprue and riser. The high-temperature molten iron burns, emitting thick black smoke and exhaust gases. Because the temperature is far above room temperature, the low-density smoke creates a powerful updraft, carrying the smoke and dust high into the air. When the temperature approaches room temperature, the smoke and VOCs in the updraft become suspended in the air and gradually descend, permeating the workshop, polluting the working environment and endangering the workers' physical and mental health. Freshly cast large castings take 4-6 hours to clear smoke and dust, and also require a considerable cooling period. After cooling, when the flask is opened, the residual heat from the casting flask can reach 50-200°C. When the flask lid is opened using a crane, the sand and dust escape along with the residual heat from the casting, accompanied by a large amount of dust. The flasks are quite large. After unpacking, the dust rises with the heat and quickly spreads into the workshop. At the same time, some of the dust inside the flasks falls off, generating more dust and a higher concentration. Due to the limitations of the crane unpacking and the large size of the flasks, there is currently no effective method for collecting the high concentration of dust generated by unpacking large castings.
[0005] The original device or equipment structure and working process: Currently, large castings are generally cast and uncasted using roof exhaust, and the factory is fully ventilated. The fan is started during operation, and the exhaust efficiency is low.
[0006] Problems with the original devices or equipment: high energy consumption for comprehensive ventilation through roof exhaust, poor exhaust effect, and smoke filling the factory during operation. Summary of the Invention
[0007] The purpose of this utility model is to provide a large casting casting and box-out smoke collection and treatment system, which can solve the above-mentioned problems and adopt an air supply device to control the direction of the smoke to ensure that the smoke enters the roof exhaust hood.
[0008] According to the technical solution provided by the present invention: A large-scale casting and box-degassing smoke collection and treatment system includes a factory building, the upper part of the factory building is divided into several smoke exhaust module working areas by a partition mechanism, and an air collection hood is installed on the top of the smoke exhaust module working area. One side of the air collection hood is connected to the input end of the smoke treatment device through the exhaust branch pipe and the exhaust main pipe in sequence, the output end of the smoke treatment device is connected to the fan, and the output end of the fan is connected to the input end of the air supply pipe. Several air supply ports are opened on the air supply section of the air supply pipe, and the air supply port is located in the smoke exhaust module working area. A smoke exhaust electric valve is installed in the exhaust branch pipe.
[0009] As a further improvement of the present invention, a crane is installed on the upper part of the factory building for horizontal sliding; the partition mechanism includes a fixed partition board and a fast rolling shutter lifting board, the fixed partition board is fixed to the top of the factory building, the upper and left and right sides are fixed to the roof truss, and the lower part is fixed to the lowest roof truss that does not affect the passage of the crane, and the fast rolling shutter lifting board is fixed to the lower side of the fixed partition board.
[0010] As a further improvement of the present invention, the partition board and the factory building can be fixed by bolt connection or welding.
[0011] As a further improvement of the present invention, the end portion of the exhaust branch pipe connected to the air collecting hood is bucket-shaped.
[0012] As a further improvement of the present invention, the air supply sections of the air supply ducts are symmetrically arranged and installed on both sides of the working area of the smoke exhaust module.
[0013] As a further improvement of the present invention, the air supply port faces the air collecting hood.
[0014] As a further improvement of the present invention, the air supply pipe is fixed on the pipeline bracket of the factory column.
[0015] The positive progress of this application is:
[0016] The utility model adopts a roof fixed partition board combined with a fast rolling shutter board to carry out zoned control of smoke and dust below, reduce exhaust volume and save energy.
[0017] The utility model adopts an air supply device to control the direction of smoke and ensures that the smoke enters the roof exhaust hood. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front view of the utility model.
[0019] Figure 2 This is a top view of the utility model (the factory building is hidden).
[0020] Figure 1-Figure 2 It includes a fixed partition board 1, a fast rolling shutter lifting board 2, an air supply pipe 3, an exhaust main pipe 4, an electric smoke exhaust valve 5, an exhaust branch pipe 6, an air supply port 7, a fan 8, a smoke treatment device 9, an overhead crane 10, and an air collecting hood 11. DETAILED DESCRIPTION
[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0022] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.
[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate for the embodiments of the present invention described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed may also be "included" and "having"; for example, a process, method, system, product or device that may include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.
[0024] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text.
[0025] like Figure 1-Figure 2As shown, a large casting casting and box-out smoke collection and treatment system includes a factory building, the upper part of the factory building is divided into several smoke exhaust module working areas by a partition mechanism, and a gas collection hood 11 is installed on the top of the smoke exhaust module working area. One side of the gas collection hood 11 is connected to the input end of the smoke treatment device 9 through the exhaust branch pipe 6 and the exhaust main pipe 4 in sequence. The output end of the smoke treatment device 9 is connected to the fan 8, and the output end of the fan 8 is connected to the input end of the air supply pipe 3. Several air supply ports 7 are opened on the air supply section of the air supply pipe 3, and the air supply ports 7 are located in the smoke exhaust module working area.
[0026] An overhead crane 10 is installed horizontally and slides horizontally above the factory building. The partition mechanism consists of a fixed partition board 1 and a fast rolling shutter lift board 2. The fixed partition board 1 is fixed to the factory building roof, with the top and left and right roof trusses fixed to it, and the bottom to the lowest roof truss that does not obstruct the passage of the overhead crane. The fast rolling shutter lift board 2 is fixed to the side below the fixed partition board 1 and is designed to not obstruct the movement of the overhead crane when retracted.
[0027] The end portion of the exhaust branch pipe 6 connected to the gas collecting hood 11 is bucket-shaped, which can increase the flow rate of the gas.
[0028] The smoke exhaust electric valve 5 is installed in the exhaust branch pipe 6 to control the working conditions of the individual smoke exhaust module working area.
[0029] The flue gas treatment device 9 filters and absorbs the flue gas.
[0030] The air supply section of the air supply pipe 3 is symmetrically arranged and installed on both sides of the smoke exhaust module working area. The air supply port 7 faces the gas collection hood 11 to assist the smoke to rise.
[0031] The air supply pipe 3 is fixed on the pipeline bracket of the factory column. The bracket and the factory column are fixed with threaded rods and clips. If allowed, the bracket can be welded.
[0032] The fan 8 and the flue gas treatment device 9 are located outside the factory building to avoid erosion by flue gas.
[0033] The working process of this utility model is as follows:
[0034] During casting and box removal in the foundry department, a large amount of thick smoke and dust, as well as the resin and other adhesives in the sand, emerge from the sand mold. After being burned by the high-temperature molten iron, thick black smoke and exhaust gas are emitted. Because the temperature is much higher than room temperature, the low-density smoke generates a strong updraft that carries the smoke and dust into the sky. When the temperature approaches room temperature, the smoke and VOCs in the updraft are suspended in the air and gradually fall and diffuse in the factory.
[0035] During casting and box removal, the crane enters the smoke exhaust module working area and stops for preparation work. The fast rolling shutter lifting plate 2 falls, the main fan 8 starts, the smoke exhaust electric valve 5 opens, and the smoke is drawn into the exhaust branch pipe 6 from the gas collecting hood 11. After passing through the exhaust main pipe 4, it enters the smoke treatment device 9 for purification, and then passes through the air supply pipe 3 and is discharged from the air supply port 7 into the smoke exhaust module working area, blowing the smoke containing impurities toward the gas collecting hood 11.
[0036] The smoke exhaust and air supply modules are divided independently according to the working area. Each module can work simultaneously or individually and accept intelligent control instructions.
[0037] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.
Claims
1. A large casting casting and degassing fume collection and treatment system, including a plant, characterized in that: The upper part of the factory building is divided into several smoke exhaust module working areas by a partition mechanism. A gas collecting hood (11) is installed on the top of the smoke exhaust module working area. One side of the gas collecting hood (11) is connected to the input end of the smoke treatment device (9) through the exhaust branch pipe (6) and the exhaust main pipe (4) in sequence. The output end of the smoke treatment device (9) is connected to the fan (8). The output end of the fan (8) is connected to the input end of the air supply pipe (3). Several air supply ports (7) are opened on the air supply section of the air supply pipe (3). The air supply ports (7) are located in the smoke exhaust module working area. A smoke exhaust electric valve (5) is installed in the exhaust branch pipe (6).
2. The large casting casting and degassing fume collection and treatment system according to claim 1, characterized in that: A crane (10) is installed on the upper part of the factory building in a horizontal sliding manner; the partition mechanism includes a fixed partition board (1) and a fast rolling shutter lifting board (2); the fixed partition board (1) is fixed to the top of the factory building, fixed to the roof trusses on the top and left and right sides, and fixed to the lowest roof truss that does not affect the passage of the crane on the bottom; the fast rolling shutter lifting board (2) is fixed to the side below the fixed partition board (1).
3. The large casting casting and degassing fume collection and treatment system according to claim 2, characterized in that: The partition plate (1) can be fixed to the factory building by bolt connection or welding.
4. The large casting casting and degassing fume collection and treatment system according to claim 1, characterized in that: The end portion of the exhaust branch pipe (6) connected to the gas collecting hood (11) is bucket-shaped.
5. The large casting casting and degassing fume collection and treatment system according to claim 1, characterized in that: The air supply sections of the air supply pipe (3) are symmetrically arranged and installed on both sides of the working area of the smoke exhaust module.
6. The large casting casting and degassing fume collection and treatment system according to claim 1, characterized in that: The air supply port (7) faces the air collecting hood (11).
7. The large casting casting and degassing fume collection and treatment system according to claim 1, characterized in that: The air supply pipe (3) is fixed on the pipe bracket of the plant column.