Cold slab sealing cover

Abstract

The application discloses a sealing cover plate of a cold material table. A sealing cover is made on the upper opening of the cold material table and can be translated. The sealing cover is driven by a pneumatic device to realize the opening and closing of the upper opening of the cold material table. Sealing doors are made around the cold material table. The fixed side sealing door and the other three side sealing doors are respectively driven to open and close by pneumatic devices. A dust removal pipe A is connected to the sealing cover, and an air extractor A and a valve A are arranged on the dust removal pipe A. A dust removal pipe B is connected to the fixed side sealing door, and a bidirectional air fan B and a valve B are connected to the dust removal pipe B. The application can comprehensively seal the outlets of the cold material table, and the smoke gas basically cannot be lost into the workshop atmosphere. The degree of automation is improved, and the human operation failure is reduced. The dust removal pipe B has a double function, and can ensure that the smoke gas can be appropriately guided and concentratedly treated.

Description

Technical Field

[0001] This invention relates to a lid for a container used in chemical plants. Background Technology

[0002] In chemical raw material and chemical product manufacturing enterprises, various reactors are involved. If they are not covered with appropriate covers or are not properly sealed, they will often emit heat and exhaust gases, which will have an adverse impact on the workshop environment and the surrounding atmosphere.

[0003] Traditional sealing caps are integrated with the reaction vessel, providing a tight seal and connecting to the outside only through a perforated tube, making them suitable for fluid media. However, they are expensive and inconvenient for solid or paste-like materials.

[0004] Some are open-top reactors, with only decorative materials covering the top or sides. They cannot be manufactured in a standardized manner, and usually have poor sealing and many defects.

[0005] In the carbon industry, large-tonnage extruders generate asphalt fumes during the electrode extrusion process. These fumes, after being cooled in the cooling cylinder and then entering the extruder, are released into the atmosphere. Maximizing the collection of these fumes into the electrostatic precipitator via hoods and pipelines has long been a major environmental challenge in the carbon industry. Traditional methods have focused on selecting appropriate dust collectors, from baghouse filters to electrostatic precipitators, and then increasing the air pressure and volume of each type of dust collector to enhance suction capacity. However, these efforts have yielded less than ideal results.

[0006] The invention disclosed in application number 201910045208.8 is a comprehensive asphalt fume treatment system. A high-intensity cooler and a continuous kneader are connected to the inlet of a regenerative thermal oxidizer (RTO) via powder conveying pipes. A waste paste conveyor belt is connected to the fume inlet of the reactor via an asphalt fume duct. A vibration molding machine is connected to the asphalt fume duct via a powder conveying pipe. The fume outlet of the RTO is connected to the asphalt fume duct via an RTO fume duct two. The RTO fume duct two is connected to the reactor via an RTO fume duct one, and the RTO fume duct two is connected to the powder conveying pipe via an RTO fume duct three. A fresh petroleum coke powder silo is connected to the reactor, the powder conveying pipe, and the asphalt fume duct via powder conveying pipes. The fume outlet of the reactor is connected to a bag filter via a pipeline. This invention provides post-treatment technology for asphalt fume, but it does not describe corresponding technologies and equipment for preventing fume diffusion.

[0007] Application No. 201310673346.3 discloses an environmental flue gas collection device for a smelting plant, comprising an overhead crane, a primary gas collection hood, a flue gas duct, a secondary gas collection hood, and a main flue. The primary gas collection hood is mounted on the overhead crane, and the flue gas duct is connected above it. The other end of the flue gas duct is located below the secondary gas collection hood, and the main flue is connected above the secondary gas collection hood to an exhaust fan. The secondary gas collection hood includes a gas collection chamber, and a flap is provided below each gas collection chamber. The flap is fixed to the gas collection chamber by a rotating shaft, one end of which is connected to a transmission gear. The transmission gear can drive the rotating shaft to rotate and open the flap when the overhead crane passes by. This invention does not clearly describe the shape and structure of the gas collection hood, and its functions are not comprehensive enough, making it inconvenient to guide the installation and layout of actual production workshops. Summary of the Invention

[0008] Purpose of the invention: A cold material platform sealing cover is provided that provides protection from five sides, does not hinder material loading and tamping, and facilitates material distribution and the dispersal and collection of fumes.

[0009] Technical solution: The original design of the cold sluice platform on the carbon product extrusion molding machine was an open-top enclosure with a support frame made of channel steel to support the paste box after it had been mixed and unloaded. The open design allowed for easy observation of the paste's hardness and oil content during feeding, facilitating material flow and compaction. However, due to the high temperature of the paste, asphalt fumes diffused into the air from above and all sides, causing a certain impact on the environment and the health of employees. This had been a long-standing and difficult problem that had remained unresolved for many years.

[0010] After discussion and research by relevant technical personnel organized by the applicant's company leaders, they independently designed and manufactured the integrated cold material platform sealing cover of this invention.

[0011] Specifically, a movable sealing cover is made at the top of the cold material platform that receives the paste. The sealing cover is driven by a pneumatic device (two devices are provided, one end of each device is connected to the right or left end of the sealing cover, and the other end is connected to the frame on the left or right side of the cold material platform; the sealing cover may have two tracks for translation below) to open and close the cold material platform.

[0012] Sealing doors are installed around the cold material platform; the sealing door on one side (fixed side) in the direction of movement is closed and cannot be opened; the other three sealing doors can be controlled to open and close separately, and are also driven by a pneumatic device (one end connected to the bottom plate of the cold material platform and the other end connected to the side sealing door plate). Each sealing door can rotate around its lower axis to open and close.

[0013] A dust collection pipe A is connected to the sealing cover, and its on / off state is controlled by a self-regulating valve A. The self-regulating valve A is preferably a one-way valve, and the dust collection pipe A is equipped with an exhaust fan A, so that the dust collection pipe A can only draw in smoke.

[0014] A dust collection pipe B is connected to the fixed-side sealing door, and its on / off state is controlled by a self-regulating valve B. The self-regulating valve B is preferably a two-way valve. A two-way fan is connected to the dust collection pipe B, which can both draw in exhaust gas (acting as an exhaust fan) and blow air in the opposite direction (acting as a blower). The controller controls the linkage between the two-way fan and the two-way self-regulating valve B (opening or closing in the same direction) to control the airflow direction, thus determining when to blow air to pressurize the cold material platform and when to draw in air to create a negative pressure effect.

[0015] The purpose of opening the side sealing door is to facilitate material tamping—manually inserting a rod to tamp the material, break up clumps, and guide the flow. Either side of the sealing door can be manually opened for tamping operations as needed. The side sealing door is positioned below the operator's eyes or hands; its rotation from below and opening from above ensure it faces the operator's field of vision and the direction of their handheld tools, facilitating observation and tamping.

[0016] Additionally, the bottom of the cold material platform has a grid to break up the poured paste and distribute it evenly to the discharge port below. Preferably, the grid is a conical grid.

[0017] All pneumatic devices and automatic valves can be automatically interlocked by a controller to determine which one should be opened, which one should be closed, and which one should be closed.

[0018] During unloading, the sealing cover is opened and the three-sided sealing doors are closed; this facilitates pouring materials from above without splashing outwards or obstructing the rotating shaft of the side sealing doors. At this time, through the controller's linkage with the automatic control valves, exhaust fan A stops working, and exhaust fan B starts to draw in the smoke, preventing the smoke from diffusing from above.

[0019] After the paste box is unloaded and leaves, all sealing covers and side sealing doors are closed to reduce internal space and minimize air leakage. At this time, through the controller's linkage with the automatic control valves, exhaust fan A starts working to extract air, and bidirectional fan B turns on to blow air, helping to disperse the overflowing fumes from the paste. The fumes are then collected and recycled by exhaust fan A and sent to the dust removal facility.

[0020] When either side of the sealed door is opened, the upper sealing cover closes, the upper exhaust fan A starts to exhaust, and the bidirectional fan B starts to draw in the smoke, preventing the smoke from overflowing from the opened side of the sealed door into the surrounding space.

[0021] Beneficial effects: The sealing cover of the present invention can automatically open and close on four sides, while the fixed side on the other side is always sealed. The bottom is for conveying and discharging paste, so the outlets on all sides of the cold material platform are fully covered, so that the flue gas will not be lost into the workshop atmosphere.

[0022] By controlling the start and stop of several pneumatic devices and two fans with a controller, the level of automation is improved, and manual operation and errors are reduced.

[0023] The bidirectional opening and closing of the bidirectional fan B allows flue gas to be drawn into and collected by dust collection pipe B, or blown in the opposite direction from dust collection pipe B and then collected and discharged centrally through dust collection pipe A. The dual function of dust collection pipe B ensures that when the upper sealing cover or either side sealing door is open, the flue gas is properly guided and will not be released into the environment. Dust collection pipe A, as the main dust collection pipe, collects and centrally discharges the flue gas, facilitating subsequent purification treatment. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of the present invention when the sealing cover is closed and the side sealing door is open.

[0025] Figure 2 This is a three-dimensional view of the present invention when the sealing cover is open and the side sealing door is closed.

[0026] Figure 3 This is a rear view of the present invention.

[0027] Figure 4 This is a partial three-dimensional structural diagram of a grid in a cold material platform according to the present invention.

[0028] Figure 5 This is a schematic diagram of a control component structure according to the present invention.

[0029] In the diagram, 1-frame; 2-track; 3-pneumatic device A; 4-exhaust fan A; 5-sealing cover; 6-pneumatic device B; 7-conical grille; 8-sealing door; 9-fixed side sealing door; 10-valve A; 11-bidirectional fan B; 12-valve B; 13-controller. Detailed Implementation

[0030] Example 1: like Figure 1 The cold material platform sealing cover shown has a pneumatic device 3 at the top of the cold material platform that drives a sliding opening and closing sealing cover 5.

[0031] The fixed side of the cold material platform is sealed with a door 9, while the other three sides have sealing doors 8 that are driven by pneumatic devices 6 and can rotate around their lower axis to open and close.

[0032] A dust removal pipe A is connected to the sealing cover 5, and the dust removal pipe A is equipped with an exhaust fan A4 and a self-control valve A10. A dust removal pipe B is connected to the fixed side sealing door 9, and the dust removal pipe B is connected to a bidirectional fan B and a self-control valve B12.

[0033] like Figure 4 As shown, all pneumatic devices 3 and automatic valves are interlocked and controlled by controller 13; When unloading, the sealing cover 5 is opened and the three-sided sealing door 8 is closed; the exhaust fan A4 stops working and the exhaust fan B is turned on to extract the smoke.

[0034] After the paste box is unloaded and leaves, all sealing covers 5 and side sealing doors 8 are closed, controller 13 is activated, exhaust fan A4 draws out the air, and bidirectional fan B blows out the air. The fumes overflowing from the paste are collected and recovered by exhaust fan A4.

[0035] Example 2: Based on Embodiment 1, the cold material platform sealing cover is equipped with a conical grid 7 at the bottom of the cold material platform, which can evenly disperse the material before it falls down.

Claims

1. A sealing cover for a cold material platform, comprising a movable sealing cover (5) at the top of the cold material platform for receiving materials, the sealing cover (5) being driven by a pneumatic device A (3) to move on two translational tracks below it to open and close the top of the cold material platform; a dust removal pipe A is connected to the sealing cover (5), and an exhaust fan A (4) and a self-controlled valve A (10) are provided on the dust removal pipe A; sealing doors (8) are made below the sealing cover (5) and around the cold material platform; one side is a fixed side sealing door (9), which is closed and cannot be opened; characterized in that: The bottom of the cold material platform has a grid; the other three side sealing doors (8) are driven by pneumatic device B (6) to rotate around the lower edge of the rotating shaft to open and close, and the upper edge can be opened, so that it is convenient for manual labor to insert a rod into the grid from the upper edge to tamp the material. A dust removal pipe B is connected to the fixed side sealing door (9), and a bidirectional fan B (11) and a self-controlled valve B (12) are connected to the dust removal pipe B. The bidirectional fan B (11) can both draw in smoke and blow air in the opposite direction. The bidirectional fan B (11) and the self-controlled valve B (12) are linked by the controller (13) to control the air direction, so as to pressurize the air in the cold material platform or draw in air to form negative pressure. The specific control process is as follows: When unloading, the sealing cover (5) is opened and the three-sided sealing door (8) is closed; the exhaust fan A (4) stops working and the bidirectional fan B (11) is turned on to extract the smoke. After the paste box is unloaded and leaves, when the sealing cover (5) and the three-sided sealing door (8) are closed, the exhaust fan A (4) draws air and the bidirectional fan B (11) blows air. The flue gas overflowing from the paste is collected and recycled by the exhaust fan A. When the upper sealing cover (5) is closed and the sealing door (8) on either side is opened, the upper exhaust fan A (4) starts to exhaust and the bidirectional fan B (11) starts to suck.

2. The cold material platform sealing cover as described in claim 1, characterized in that: Pneumatic device A (3), pneumatic device B (6), automatic valve A (10) and automatic valve B (12) are all controlled by a controller (13).

3. The cold material platform sealing cover as described in claim 1 or 2, characterized in that: The grille is a tapered grille (7).

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