An air circulation purification system for a barite powder production workshop

Abstract

The present invention discloses an air circulation purification system for a barite powder production workshop, including: a diaphragm pump connected to the air inlet end of any ventilation port in the production workshop, a gravity dust collector connected to the exhaust end of the diaphragm pump, for preliminary sedimentation of powder in the air, a cyclone separator connected to the exhaust end of the gravity dust collector, for rapid preliminary separation of powder with larger particles in the air, and a bag filter connected to the exhaust end of the cyclone separator for fine filtering and separation of powder with larger particles in the air. The air circulation purification system for the barite powder production workshop adopts a series-parallel mode of multiple dust treatment devices to filter the powder in the air at multiple stages, so that the filtering pressure of the equipment with slower filtering speed and higher filtering accuracy is lower, so that the air to be filtered can pass through the equipment with higher filtering accuracy as soon as possible, and the air circulation speed in the production workshop is improved.

Description

Technical Field

[0001] The invention relates to the technical field of barite powder processing, and in particular to an air circulation purification system for a barite powder production workshop. Background Art

[0002] Barite powder, also known as barium sulfate powder, has a chemical composition of BaSO4. The crystals are sulfate minerals of the orthorhombic (orthorhombic) system. They are often thick plate-shaped or columnar crystals, mostly dense block-shaped or plate-shaped, granular aggregates. When pure, they are colorless and transparent. When they contain impurities, they are dyed into various colors. The streak is white, the luster is glassy, ​​transparent to translucent, with complete and moderate cleavage in three directions, the Mohs hardness is 3-3.5, the specific gravity is 4.5, the plate-shaped crystals have low hardness, nearly right-angled complete cleavage, high density, no foaming in hydrochloric acid, and are distinguished from the similar calcite. Barite is mainly formed under medium and low temperature hydrothermal conditions. There are huge barite veins in many regions of my country. Barite is the raw material for extracting barium. It can be ground into fine powder as a mud weighting agent for drilling, and broken into pieces can be used as a substitute It can be used as a substitute for stone to make radiation-proof gravity walls, and can also be used as various white pigments, coatings, and fillers and chemicals for the rubber and paper industries. In the production process of barite powder, raw materials are crushed. The raw materials are crushed by a jaw crusher to break the ore into small pieces. Then the flake stone is selected and artificially selected to remove impurities. Then the material is ground. A ball mill is used to grind the material to grind the ore into powder of a certain particle size. Then the material is classified. A classifier is used to classify the ground powder according to the particle size to obtain barite powder that meets the requirements. Next, the material is dried. The moisture in the powder is removed by dry air separation or hot air drying in a hot air furnace to ensure product quality. Then the material is crushed. Use a pulverizer to pulverize the dried material to further refine the powder particle size. During this series of production and material pouring processes, powder will continue to spill into the air. Although barite powder is not widely toxic, it may pose a health threat to the human body under conditions of long-term exposure and large-scale inhalation. In a laboratory environment, the results of the acute toxicity test of barite on mice showed that its LD50 value was even greater than 10 grams / kilogram, indicating that at a certain concentration, barite powder is a non-toxic substance to mice. However, in an industrial production environment, barite powder is made into powder with a large number of fine particles, which are easily inhaled into the human body. Long-term exposure to the dust environment of barite powder may cause certain irritation and damage to the human respiratory system and lungs. Therefore, when producing and using barite powder, you must pay attention to the relevant safety requirements. The use of special masks, protective glasses, gloves and other protective equipment can effectively prevent the inhalation and contact of barite powder and reduce safety risks. In addition to the health risks caused by long-term exposure to barite powder dust, barite powder may also cause certain pollution to the environment. During the production and use of barite powder, some chemicals may be discharged into the environment, affecting water quality and air quality, and causing harm to humans and ecosystems. Therefore, in the production and use of barite powder, it is necessary to strictly abide by environmental protection regulations and relevant laws and regulations, and take necessary prevention and control measures to ensure that no pollution and damage is caused to the environment. In short, attention should be paid to safety issues in the production and use of barite powder.Avoid long-term exposure and contact, and pay attention to environmental protection and the impact on human health. Therefore, workers need to take strict protection during operation. At the same time, it is necessary to install filtering equipment on the ventilation system of the production workshop to prevent the powder from spilling into the external environment and polluting the environment. However, traditional single filtering equipment cannot take into account the filtering speed and filtering accuracy when filtering the air, which is not conducive to air circulation and heat dissipation in the production workshop. Summary of the invention

[0003] The object of the present invention is to provide an air circulation purification system for a barite powder production workshop to solve the problem of poor air filtration method proposed in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: an air circulation purification system for a barite powder production workshop, comprising:

[0005] The diaphragm pump is connected to the air inlet of any air exchange port in the production workshop;

[0006] A gravity dust collector, connected to the exhaust port of the diaphragm pump, is used to initially settle the powder in the air;

[0007] The cyclone separator is connected to the exhaust port of the gravity dust collector and is used to quickly and initially separate larger particles of powder in the air;

[0008] A bag dust collector is connected to the exhaust end of the cyclone separator and is used to finely filter and separate larger particles of powder in the air. The dust outlets of the bag dust collector and the cyclone separator are both connected to the same powder collection cabin;

[0009] The wet electrostatic precipitator is connected to the exhaust end of the bag filter and is used to electrostatically adsorb and separate smaller particles of powder in the air;

[0010] The water bath dust collector is connected to the exhaust port of the wet electrostatic precipitator to perform final separation of powders that cannot be separated by the wet electrostatic precipitator and to humidify the air.

[0011] Preferably, two groups of cyclone separators are provided, and a guide valve is installed at one end of the pipeline connecting the cyclone separator and the gravity dust collector, and the two groups of cyclone separators are installed in parallel.

[0012] Preferably, a guide valve 2 and a guide valve 3 are installed at one end of the pipe connecting the bag dust collector and the cyclone separator, and a one-way valve is installed between the guide valve 2 and the guide valve 3, and a pressure sensor 1 is arranged between the one-way valve and the guide valve 2, and the guide valve 2 and the guide valve 1 are linked by a wire connection.

[0013] Preferably, the guide valve 1, the guide valve 2 and the guide valve 3 are all provided with three diversion modes: single opening, double opening and double closing.

[0014] Preferably, a controller is integrated on the pressure sensor 1, the guide valve 3 is connected to two temporary pressure vessels through a pipeline, and the pressure sensor 2 is arranged in the pipeline connecting the guide valve 3 and the two temporary pressure vessels.

[0015] Preferably, the second pressure sensor is connected to an emergency stop switch via a wire, and the emergency stop switch is connected to the diaphragm pump via a wire.

[0016] Preferably, the liquid outlet pipe of the water bath dust collector is connected in series with the water pump, the evaporation chamber and the condenser respectively, and the condenser is connected with the liquid inlet pipe of the water bath dust collector through a pipe.

[0017] Preferably, the air outlet pipe of the water bath dust collector is connected to the air outlet end of any ventilation port in the production workshop, and the air outlet end of any ventilation port in the production workshop is located in the lower half of the production workshop, and the air outlet end of any ventilation port in the production workshop is located in the upper half of the production workshop.

[0018] Preferably, the temporary storage pressure container is a canned design with a piston arranged inside, and a pressure balancing valve is arranged at the upper end of the temporary storage pressure container, and the pipeline connecting the temporary storage pressure container and the guide valve and the pressure balancing valve are respectively located on both sides of the piston inside the temporary storage pressure container.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the air circulation purification system for the barite powder production workshop:

[0020] 1. By adopting a series-parallel connection of multiple dust treatment devices, the powder in the air is filtered at multiple levels, so that the filtering pressure of the equipment with slower filtering speed and higher filtering accuracy is lower, so that the air to be filtered can pass through the equipment with higher filtering accuracy as quickly as possible, and the air circulation speed in the production workshop is improved, so that the air quality in the workshop can be guaranteed;

[0021] 2. Furthermore, by installing two cyclone separators in parallel, a guide valve is used to switch the gas flow direction to achieve a working mode in which one cyclone separator is in operation while the other is in maintenance, so that the working mode can be flexibly adjusted according to the dust concentration in the production workshop;

[0022] 3. Furthermore, a temporary pressure vessel is used to divert the gas, so that the bag filter can stop supplying air to the bag filter when maintenance is required, and the air stored in the temporary pressure vessel can be filtered again by gradually releasing it when the filtering pressure is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the system flow of the present invention. DETAILED DESCRIPTION

[0024] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 The present invention provides a technical solution: an air circulation purification system for a barite powder production workshop, comprising:

[0026] The diaphragm pump is connected to the air inlet of any air exchange port in the production workshop;

[0027] A gravity dust collector, connected to the exhaust port of the diaphragm pump, is used to initially settle the powder in the air;

[0028] The cyclone separator is connected to the exhaust port of the gravity dust collector and is used to quickly and initially separate larger particles of powder in the air;

[0029] The bag dust collector is connected to the exhaust end of the cyclone separator and is used to finely filter and separate larger particles of powder in the air. The dust outlets of the bag dust collector and the cyclone separator are both connected to the same powder collection cabin;

[0030] The wet electrostatic precipitator is connected to the exhaust end of the bag filter and is used to electrostatically adsorb and separate smaller particles of powder in the air;

[0031] The water bath dust collector is connected to the exhaust port of the wet electrostatic precipitator to perform final separation of powders that cannot be separated by the wet electrostatic precipitator and to humidify the air.

[0032] During purification, the diaphragm pump is turned on to extract the air in the production workshop, and the air enters the gravity dust collector, so that the dust naturally settles from the airflow by its own gravity, so as to achieve the purpose of separating or capturing particles in the dust-laden airflow. At this time, the air passes through the first guide valve and enters the cyclone separator. After the cyclone separator purifies the dust in the air, the purified air passes through the second guide valve, the one-way valve and the third guide valve and enters the bag filter. At this time, the air passes through the bag filter and enters the wet electrostatic precipitator and the water bath filter, so that the dust in the air is completely removed. At this time, the air filtered and humidified by the water bath filter is re-circulated and injected into the production workshop, so as to achieve the purpose of circulating and purifying the air in the production workshop.

[0033] Two groups of cyclone separators are provided, and a guide valve is installed at one end of the pipeline connecting the cyclone separator and the gravity dust collector, and the two groups of cyclone separators are installed in parallel.

[0034] A guide valve 2 and a guide valve 3 are installed at one end of the pipe connecting the bag dust collector and the cyclone separator, and a one-way valve is installed between the guide valve 2 and the guide valve 3, and a pressure sensor 1 is arranged between the one-way valve and the guide valve 2. The guide valve 2 and the guide valve 1 are linked by a wire connection.

[0035] The pilot valve 1, the pilot valve 2 and the pilot valve 3 are all provided with three diversion modes: single opening, double opening and double closing.

[0036] A controller is integrated on the pressure sensor 1, the guide valve 3 is connected to two temporary pressure vessels through a pipeline, and the pressure sensor 2 is arranged in the pipeline connecting the guide valve 3 and the two temporary pressure vessels.

[0037] The pressure sensor 2 is connected to the emergency stop switch through a wire, and the emergency stop switch is connected to the diaphragm pump through a wire.

[0038] The liquid outlet pipeline of the water bath dust collector is respectively connected in series with the water pump, the evaporation chamber and the condenser, and the condenser is connected with the liquid inlet pipeline of the water bath dust collector through a pipeline.

[0039] The air outlet pipe of the water bath dust collector is connected to the air outlet end of any ventilation port in the production workshop, and the air outlet end of any ventilation port in the production workshop is located in the lower half of the production workshop, and the air outlet end of any ventilation port in the production workshop is located in the upper half of the production workshop.

[0040] The temporary storage pressure vessel is a canned design with a piston inside, and a pressure balancing valve is provided at the upper end of the temporary storage pressure vessel, and the pipes and pressure balancing valve connecting the temporary storage pressure vessel and the guide valve are respectively located on both sides of the piston inside the temporary storage pressure vessel.

[0041] When one set of cyclone separators needs to be maintained, all dusty air discharged from the gravity dust collector is guided to another set of cyclone separators for filtration through guide valve 1. At this time, guide valve 2 is linked with guide valve 1 to cut off the connection between the cyclone separators under maintenance and the circulation system, ensuring that no air enters the cyclone separators under maintenance when cleaning dust, so that the internal parts of the cyclone separators under maintenance can be collected through the powder collection cabin for unified treatment;

[0042] When the air flows to the bag filter through the second guide valve, the one-way valve and the third guide valve, the bag filter filters the air and uses the gas to pass through the woven or pressed fiber mesh filter material to achieve gas purification. Since the pores of the filter material are often larger than the diameters of some particles to be intercepted, in the early stage of the filtration process, the particles in the gas will first fill part of the gaps in the filter material, and then a powder layer will be formed on the surface of the filter material. With the establishment of the powder coating layer, the filtration efficiency will increase, and the pressure drop of the gas through the filter material will also increase accordingly. When this pressure drop exceeds the set limit value and affects subsequent filtration , the performance of the filter material needs to be updated. At this time, pulse back-blowing air is usually used to blow off the powder layer and make it fall into the ash hopper to achieve the regeneration of the filter material, and then the filtering can continue. At this time, with the increase of pressure drop, the pressure between the guide valve 2 and the guide valve 3 increases, and the pressure sensor 1 detects the increase in pressure. At this time, the pressure sensor 1 sends an electrical signal to the guide valve 3, and the guide valve 3 guides the air of the bag dust collector to the temporary storage pressure vessels on both sides, so that the bag dust collector can now blow the filtered powder back into the powder collection cabin by pulse back-blowing;

[0043] After a period of time, after the pulse backflushing is completed, pressure sensor 1 detects a decrease in pressure. At this time, pressure sensor 1 sends an electrical signal to guide valve 3, and guide valve 3 guides the air in the temporary pressure vessel to the bag dust collector for further filtration. In the repeated process of the above process, when the pressure in the temporary pressure vessel reaches the maximum, pressure sensor 2 sends an electrical signal to pressure sensor 1, and pressure sensor 1 transmits the pressure signal to the controller. The controller controls guide valve 2 to switch to a double-closed working state. At the same time, pressure sensor 2 sends an electrical signal to the emergency stop switch to stop the diaphragm pump, so that the bag dust collector can fully backflushed. At the same time, after the backflushing of the bag dust collector is completed, guide valve 3 releases the gas in the temporary pressure vessel until the gas in the two temporary pressure vessels is completely released. At this time, guide valve 2 and guide valve 3 are both switched to normal, and the emergency stop switch is closed to resume normal operation of the diaphragm pump.

[0044] When the powder in the air enters the water in the water bath dust collector, the water pump extracts the water in the water bath dust collector and inputs it into the evaporation chamber. The evaporation chamber evaporates the extracted water so that the powder remains in the evaporation chamber waiting to be cleaned and reused, and the water vapor enters the condenser and condenses into cold water and flows back to the water bath dust collector, completing the water cycle.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air circulation purification system for a barite powder production workshop, characterized in that: include The diaphragm pump is connected to the air inlet of any air exchange port in the production workshop; A gravity dust collector, connected to the exhaust port of the diaphragm pump, is used to initially settle the powder in the air; A cyclone separator is connected to the exhaust end of the gravity dust collector and is used for rapid preliminary separation of larger particles of powder in the air; two groups of cyclone separators are provided, and a guide valve 1 is installed at one end of the pipe connecting the cyclone separator and the gravity dust collector, and the two groups of cyclone separators are installed in parallel. By installing the two groups of cyclone separators in parallel and switching the gas flow direction through the guide valve 1, a working mode in which one group of cyclone separators is in operation while the other group of cyclone separators is under maintenance is achieved; A bag dust collector is connected to the exhaust end of the cyclone separator and is used for fine filtering and separation of larger particles of powder in the air. The dust outlets of the bag dust collector and the cyclone separator are both connected to the same powder collection cabin; a guide valve 2 and a guide valve 3 are installed at one end of the pipeline connecting the bag dust collector and the cyclone separator, and a check valve is installed between the guide valve 2 and the guide valve 3, and a pressure sensor 1 is provided between the check valve and the guide valve 2, and the guide valve 2 and the guide valve 1 are linked by a wire connection; The wet electrostatic precipitator is connected to the exhaust end of the bag filter and is used to electrostatically adsorb and separate smaller particles of powder in the air; A water bath dust collector is connected to the exhaust port of the wet electrostatic precipitator and is used to finally separate the powder that cannot be separated by the wet electrostatic precipitator and to humidify the air; The pressure sensor 1 is integrated with a controller, the guide valve 3 is connected to the two temporary pressure vessels through a pipeline, and the guide valve 3 is connected to the two temporary pressure vessels in the pipeline provided with a pressure sensor 2; The temporary storage pressure vessel is a canned design with a piston inside, and a pressure balancing valve is provided at the upper end of the temporary storage pressure vessel, and the pipeline connecting the temporary storage pressure vessel and the guide valve and the pressure balancing valve are respectively located on both sides of the piston inside the temporary storage pressure vessel.

2. An air circulation purification system for a barite powder production workshop according to claim 1, characterized in that: The first guide valve, the second guide valve and the third guide valve are all provided with three diversion modes: single opening, double opening and double closing.

3. An air circulation purification system for a barite powder production workshop according to claim 1, characterized in that: The second pressure sensor is connected to an emergency stop switch via a wire, and the emergency stop switch is connected to a diaphragm pump via a wire.

4. An air circulation purification system for a barite powder production workshop according to claim 1, characterized in that: The liquid outlet pipeline of the water bath dust collector is respectively connected in series with the water pump, the evaporation chamber and the condenser, and the condenser is connected with the liquid inlet pipeline of the water bath dust collector through a pipeline.

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