On-ground straight-line dust removal equipment for construction waste disposal

Abstract

The utility model provides in-situ straight-line dust removal equipment for construction waste disposal. The in-situ straight-line dust removal equipment comprises a dust inlet, a primary filtering chamber, an air inducing chamber, a blowing dust removal mechanism, a secondary filtering chamber and a control device, the filter element dust removal structure with the multiple filter cartridges is used for filtering and removing dust of waste gas of construction waste, one-to-one real-time blowing dust removal is conducted on the filter cartridges in cooperation with the blowing dust removal mechanism, an air bag in the blowing dust removal mechanism is arranged outside an equipment shell, a blowing valve directly penetrates through a wall plate to be fixed and right faces the filter cartridges, the blowing dust removal effect is effectively guaranteed, and the dust removal efficiency is improved. Compared with the traditional construction waste dust removal equipment, the dust content in the filtered and dedusted waste gas is greatly reduced, and the dust is filtered and discharged for the second time, so that the dust removal effect of directly discharging on the ground can be achieved; in addition, the filtering and dust removing effects are enhanced, meanwhile, the occupied area is greatly reduced, and installation in an indoor construction site is more facilitated.

Description

Technical Field

[0001] The utility model relates to the field of dust removal of construction waste, in particular to an on-site direct dust removal device for construction waste disposal. Background Art

[0002] The generation and treatment of construction waste often produces a lot of dust, which affects the health of workers and the surrounding environment. In the prior art, a dust removal device is connected to the tail end of the construction waste recycling and treatment equipment, and the waste gas is dusted and connected to the outdoor exhaust chimney through a pipeline to be discharged into the outdoor atmosphere. The country has strict requirements for the emission of waste gas during the treatment of construction waste. The treated waste gas needs to meet the GB16297 standard before it can be discharged into the surrounding atmosphere. The dust removal equipment currently used in the construction waste treatment industry can only perform primary filtration. The pleated filter element commonly used in the dust removal equipment in the industry has a large area and a small volume. It is difficult to remove dust from gases with high dust concentrations, and the equipment itself is difficult to clean. It is easy to cause waste gas emissions to fail to meet the standards during actual use. In addition, the current industry adopts outdoor discharge, which usually requires the exhaust chimney to be more than 5m higher than the surrounding buildings within a radius of 200m. There are high requirements for the emission rate of the exhaust chimney and the distance between the exhaust chimney and the surrounding buildings. The construction waste treatment site needs to increase the construction cost and site cost of the exhaust chimney; even so, the surrounding residents still react strongly to the emission of waste gas from the outdoor chimney, affecting the progress of construction waste treatment. In response to the above-mentioned problems caused by the current methods of waste gas dust removal and outdoor discharge in the construction waste treatment industry, our company has developed a method for on-site direct discharge of waste gas dust from construction waste. Utility Model Content

[0003] The utility model provides an on-site direct dust removal device for construction waste disposal in order to solve the problem that the current construction waste dust removal effect is poor and only preliminary dust removal and outdoor discharge can be performed.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An on-site direct dust removal device for construction waste disposal, comprising a dust inlet, a preliminary filtering chamber, an air induction chamber, a spraying and cleaning mechanism and a control device;

[0006] The dust inlet is located on the side wall of the preliminary filter chamber, and the dust inlet is tightly connected to the exhaust gas outlet of the construction waste recycling and processing equipment; the preliminary filter chamber is provided with m*n filter cartridges inside and used to filter the exhaust gas, wherein m≥1 and is a natural number, and n≥1 and is a natural number; the bottom of the preliminary filter chamber is provided with a dust outlet, and the induced draft chamber is provided with a fan and is connected to the preliminary filter chamber, and the fan is used to generate an airflow and guide the dust-containing gas to be discharged from the dust inlet after being filtered through the preliminary filter chamber; the spray cleaning mechanism includes m air bags and m*n spray valves, the m air bags are installed on the outside of the preliminary filter chamber and correspond to the positions of the m rows of filter cartridges, and n spray valves are installed on each air bag, and the m*n spray valves correspond to the m*n filter cartridges one by one, and the spray valve directly passes through and is fixed on the wall panel of the preliminary filter chamber;

[0007] The control device is electrically connected to the preliminary filtering chamber, the induced draft chamber, and the spray cleaning mechanism and is used to issue control instructions.

[0008] Preferably, m air bags are connected in series.

[0009] Preferably, the spray valve is directly fixedly mounted on the wall plate of the preliminary filtration chamber by using a dedicated wall penetrator, and the spray direction of each spray valve coincides with the axis of the corresponding filter cartridge.

[0010] Preferably, the control device controls m*n spray valves to spray sequentially from top to bottom.

[0011] Preferably, a filter cartridge pressure difference sensor and an alarm are installed in the preliminary filtration chamber. The filter cartridge pressure difference sensor is connected to the control device and transmits a pressure difference signal to the control device. The alarm is connected to the control device and is used to receive control instructions from the control device and then alarm.

[0012] Preferably, it also includes a secondary filter chamber, the preliminary filter chamber and the secondary filter chamber are respectively located on both sides of the air inlet and outlet of the induced draft chamber, the induced draft chamber is used to guide the dust-containing gas from the preliminary filter chamber to the secondary filter chamber and then discharge it, the secondary filter chamber is connected to the control device and its filtration grade standard is greater than the filtration grade standard of the preliminary filter chamber.

[0013] Preferably, the preliminary filter chamber, the air induction chamber and the secondary filter chamber are arranged vertically in order from bottom to top.

[0014] Preferably, the dust outlet is tightly connected to a movable ash truck.

[0015] Preferably, the control device is an electric control box and uses PLC for electrical control.

[0016] Preferably, it includes a wind speed sensor and an alarm, wherein the wind speed sensor is connected to the control device and is used to monitor the gas flow rate in the equipment, and the alarm is connected to the control device and alarms when the control device determines that the wind speed exceeds a safe value.

[0017] Compared with the prior art, the beneficial effects of the utility model are: using multiple filter cartridges for dust removal and filtration in the disposal of construction waste, and cooperating with a spray cleaning mechanism with an external air bag and a spray valve fixed through the wall, the one-to-one spray cleaning effect is better, and the dust removal and filtration effect is better. At the same time, it can effectively reduce the footprint of the dust removal equipment, making it more convenient to install in the construction room, and the dust content in the exhausted exhaust gas is greatly reduced, which can meet the indoor emission standards and can achieve direct discharge on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an on-site direct dust removal device for construction waste disposal;

[0020] Figure 2 It is a structural schematic diagram of another perspective of an on-site direct dust removal device for construction waste disposal;

[0021] Figure 3 The figure is a schematic diagram of the internal structure of an on-site direct dust removal device for construction waste disposal.

[0022] Among them, there are dust inlet 1, preliminary filter chamber 2, induced draft chamber 3, spray cleaning mechanism 4, control device 5, secondary filter chamber 6, ash truck 7, filter cartridge 21, dust outlet 22, spray valve 41, air bag 42, and special wall penetrator 43. DETAILED DESCRIPTION

[0023] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] An on-site direct dust removal device for construction waste disposal, comprising a dust inlet 1, a preliminary filtering chamber 2, an air induction chamber 3, a spraying and cleaning mechanism 4 and a control device 5;

[0026] The dust inlet 1 is located on the side wall of the preliminary filter chamber 2, and the dust inlet 1 is tightly connected to the exhaust gas outlet of the construction waste recycling and processing equipment; the preliminary filter chamber 2 is provided with m*n filter cartridges 21 for filtering the exhaust gas, wherein m≥1 and is a natural number, and n≥1 and is a natural number; the bottom of the preliminary filter chamber 2 is provided with a dust outlet 22, and the induced air chamber 3 is provided with a fan and is connected with the preliminary filter chamber 2, and the fan is used to generate an airflow and guide the dust-containing gas from the dust inlet 1 to pass through the preliminary filter chamber 2 for filtration and then be discharged; the spray cleaning mechanism 4 includes m air bags 42 and m*n spray valves 41, the m air bags 42 are installed outside the preliminary filter chamber 2 and correspond to the positions of the m rows of filter cartridges 21, and each air bag 42 is installed with n spray valves 41, and the m*n spray valves 41 correspond to the m*n filter cartridges 21 one by one, and the spray valve 41 directly passes through and is fixed on the wall plate of the preliminary filter chamber 2;

[0027] The control device 5 is electrically connected to the preliminary filtering chamber 2, the induced draft chamber 3, and the spray cleaning mechanism 4 and is used to issue control instructions.

[0028] The on-site direct dust removal equipment of the utility model is specially used for construction sites for construction waste disposal. Construction sites for construction waste disposal use construction waste recycling and processing equipment to clean up gravel and other construction waste. A large amount of dust will be generated during the collection and crushing process. The dust inlet 1 of the on-site direct dust removal equipment of the utility model is tightly connected to the exhaust gas outlet of the construction waste recycling and processing equipment, and the dust-containing exhaust gas generated at the construction site is processed in real time. The utility model adopts a filtering structure of multiple filter cartridges 21 to filter dust. Compared with the pleated filter element commonly used in the current construction waste treatment industry, the use of multiple filter cartridges 21 for filtering has a smaller volume and a larger filtering area. Especially for construction waste dust with a high dust concentration that diffuses into the interior of the dust removal equipment, the dust removal efficiency is higher and the dust removal effect is better. At the same time, changing the air bag 42 of the spray cleaning mechanism 4 to an external installation can effectively reduce the outer shell volume of the dust removal equipment, so that it can be placed directly on the construction site, and the spray valve 41 is directly fixed on the wall panel of the preliminary filter chamber 2 through the wall panel, so that the installation angle of the spray valve 41 can be fixed, reducing the chance of shaking, and the spray is directed to the center of the filter cartridge 21. The spray valve 41 and the filter cartridge 21 are installed one-to-one, so that the on-site direct dust removal equipment of the utility model can obtain better spray cleaning effect, thereby obtaining better filtering and dust removal effect.

[0029] In one embodiment, m air bags 42 are connected in series. The air bags 42 are externally placed and connected in series, so that the air sources of the m air bags 42 can be shared. Therefore, when the spray valve 41 sprays and cleans, it can not only use the air source of the air bag 42 where it is located, but also use all the air sources of the m air bags 42 connected in series, so that a better spray and clean effect can be obtained.

[0030] In a preferred embodiment, the air bag 42 can be a square air bag 42, and the spray valve 41 can be a submerged valve. The above combination can reduce the volume of the spray cleaning structure, occupy less space, but have a better spray effect.

[0031] In one embodiment, the spray valve 41 is directly fixed on the wall panel of the preliminary filter chamber 2 by using a special wall penetrator 43. The spray direction of each spray valve 41 coincides with the axis of its corresponding filter cartridge 21. The special wall penetrator 43 installs the spray valve 41, so that the spray valve 41 can be quickly and detachably installed through the wall panel and ensure that the spray axis of the spray valve 41 is perpendicular to the wall panel and can coincide with the axis of the corresponding filter cartridge 21 to obtain the best cleaning effect, reduce the difficulty of installation, and avoid the situation where the installation angle deviation of the spray valve 41 affects the spray effect due to the poor skills of the installers during installation.

[0032] In a preferred embodiment, the control device 5 controls the m*n spray valves 41 to spray in sequence from top to bottom to keep all the filter cartridges 21 clean after spraying, and avoids the situation where the upper filter cartridge 21 is cleaned after the lower filter cartridge 21 is sprayed and cleaned, causing the dust in the upper filter cartridge 21 to fall onto the lower filter cartridge 21 again, thereby affecting the filtering effect of the filter cartridge 21.

[0033] In a preferred embodiment, a filter cartridge 21 pressure difference sensor and an alarm are installed in the preliminary filtration chamber 2. The filter cartridge 21 pressure difference sensor is connected to the control device 5 and transmits a pressure difference signal to the control device 5. The alarm is connected to the control device 5 and is used to receive control instructions from the control device 5 and then alarm. The pressure difference value measured by the pressure difference sensor of the filter cartridge 21 can also be used as a feedback parameter to control the blowing work of the blowing and cleaning mechanism 4. For example, the upper limit and lower limit of the pressure difference of the filter cartridge 21 are pre-set. If the measured pressure difference reaches the upper limit, the control device 5 controls the blowing and cleaning mechanism 4 to blow until the pressure difference reaches the lower limit, so that the filter cartridge 21 can work again. If the lower limit of the pressure difference cannot be reached after three consecutive blowing and cleaning, the upper limit and the lower limit are adjusted to be slightly higher than the minimum pressure difference that can be achieved after the current blowing and cleaning. Repeat the above monitoring-cleaning work until the upper limit of the monitored pressure difference exceeds the preset dangerous alarm value, then the alarm directly alarms to notify the staff to inspect and replace the filter cartridge 21. The above-mentioned pressure difference sensor, alarm, control device 5, and blowing and cleaning device are used in combination, so that the filter cartridge 21 can obtain an automatic and effective blowing and cleaning effect, and according to the actual use of the filter cartridge 21, the best dust removal and filtering effect that can be achieved is always maintained.

[0034] In a preferred embodiment, the on-site direct dust removal equipment of the utility model also includes a secondary filter chamber 6, the preliminary filter chamber 2 and the secondary filter chamber 6 are respectively located on both sides of the air inlet and outlet of the induced draft chamber 3, the induced draft chamber 3 is used to guide the dust-containing gas from the preliminary filter chamber 2 to the secondary filter chamber 6 and then discharge it, the secondary filter chamber 6 is connected to the control device 5 and its filtration grade standard is greater than the filtration grade standard of the preliminary filter chamber 2, for example, the preliminary filter chamber 2 can adopt the medium efficiency filtration of the F9 filtration grade standard, and the secondary filter chamber 6 can adopt the high efficiency filtration of the H13 or H14 filtration grade standard. After the construction waste dust is filtered by the preliminary filter chamber 2 and then filtered again by the secondary filter chamber 6, the discharged exhaust gas can be filtered to the indoor emission standard and directly discharged.

[0035] In one embodiment, the primary filter chamber 2, the induced draft chamber 3 and the secondary filter chamber 6 are arranged vertically from bottom to top, shortening the gas path and reducing the volume of the dust removal equipment, so that the dust removal equipment has a vertical structure and occupies a small area, which is more convenient to install in an indoor construction site.

[0036] In one embodiment, the dust outlet 22 is tightly connected to the movable ash car 7, and the dust outlet 22 can be set to a conical structure, so that the dust can naturally accumulate at the bottom, and conveniently fall into the ash car 7 along the conical slope. A ash car 7 proximity switch, a gate valve closing alarm, and a ash car 7 material level alarm light device can also be installed at the dust outlet 22 to monitor whether the ash car 7 is tightly connected to the dust outlet 22, whether the gate valve is closed, whether the ash car 7 reaches the specified material level when loaded, etc. After being connected to the control device 5, intelligent monitoring and control can be realized to reduce labor costs.

[0037] In one embodiment, the control device 5 is an electric control box and uses PLC for electrical control. A fail-safe PLC can be used to record monitoring data and alarm information; a thermal overload protector is set to trip the overload to protect the motor; a phase sequence protector is set to not start when the power supply is missing or reversed; it is linked with the main equipment and can be remotely controlled to stop; an emergency stop button is configured; the overall protection level of the electric control cabinet meets IP54, so that the safety performance of the equipment is effectively guaranteed.

[0038] In one embodiment, a wind speed sensor and an alarm are included. The wind speed sensor is connected to the control device 5 and is used to monitor the gas flow rate in the equipment. The alarm is connected to the control device 5 and realizes fool-proofing by monitoring the fluctuation of wind speed. If the wind speed does not change for a long time, an alarm is issued.

[0039] The electric control box can also be equipped with a touch screen to provide a human-computer interaction interface, which can be used to set parameters such as upper and lower limits for temperature values, pressure difference backblowing, etc.

[0040] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. An on-site direct dust removal device for construction waste disposal, characterized in that: It includes dust inlet, preliminary filtering chamber, induced draft chamber, spray cleaning mechanism and control device; The dust inlet is located on the side wall of the preliminary filter chamber, and the dust inlet is tightly connected to the exhaust gas outlet of the construction waste recycling and processing equipment; the preliminary filter chamber is provided with m*n filter cartridges inside and used to filter the exhaust gas, wherein m≥1 and is a natural number, and n≥1 and is a natural number; the bottom of the preliminary filter chamber is provided with a dust outlet, and the induced draft chamber is provided with a fan and is connected to the preliminary filter chamber, and the fan is used to generate an airflow and guide the dust-containing gas to be discharged from the dust inlet after being filtered through the preliminary filter chamber; the spray cleaning mechanism includes m air bags and m*n spray valves, the m air bags are installed on the outside of the preliminary filter chamber and correspond to the positions of the m rows of filter cartridges, and n spray valves are installed on each air bag, and the m*n spray valves correspond to the m*n filter cartridges one by one, and the spray valve directly passes through and is fixed on the wall panel of the preliminary filter chamber; The control device is electrically connected to the preliminary filtering chamber, the induced draft chamber, and the spray cleaning mechanism and is used to issue control instructions.

2. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: m air bags are connected in series.

3. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: The spray valve is directly fixedly mounted on the wall plate of the preliminary filtering chamber by using a special wall penetrator, and the spray direction of each spray valve coincides with the axis of the corresponding filter cartridge.

4. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: The control device controls m*n spray valves to spray in sequence from top to bottom.

5. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: A filter cartridge pressure difference sensor and an alarm are installed in the preliminary filtration chamber. The filter cartridge pressure difference sensor is connected to the control device and transmits a pressure difference signal to the control device. The alarm is connected to the control device and is used to receive a control instruction from the control device and then alarm.

6. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: It also includes a secondary filter chamber, the preliminary filter chamber and the secondary filter chamber are respectively located on both sides of the air inlet and outlet of the induced draft chamber, the induced draft chamber is used to guide the dust-containing gas from the preliminary filter chamber to the secondary filter chamber and then discharge it, the secondary filter chamber is connected to the control device and its filtration grade standard is greater than the filtration grade standard of the preliminary filter chamber.

7. The on-site direct dust removal equipment for construction waste disposal according to claim 6, characterized in that: The preliminary filter chamber, the air induction chamber and the secondary filter chamber are arranged vertically in order from bottom to top.

8. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: The dust outlet is tightly connected to the movable dust truck.

9. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: The control device is an electric control box and uses PLC for electrical control.

10. The on-site direct dust removal equipment for construction waste disposal according to claim 1, characterized in that: It includes a wind speed sensor and an alarm. The wind speed sensor is connected to the control device and is used to monitor the gas flow rate in the equipment. The alarm is connected to the control device and alarms when the control device determines that the wind speed exceeds a safe value.

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