120 results about "Respirable dust" patented technology

The invention discloses a compound dust suppression agent for a coal mine and a preparation method of the compound dust suppression agent. The compound dust suppression agent comprises the following components in percent by mass: 0.05-1.00 percent of fatty alcohol-polyoxyethylene ether (JFC), 0.05-1.00 percent of sodium dodecyl benzene sulfonate (SDBS), 0.01-0.50 percent of polyacrylamide (PAM), 0.02-0.50 percent of polymeric aluminium (PAC) and the balance of water. The compound dust suppression agent disclosed by the invention has the advantages that the components are water-soluble materials, can be directly sprayed by using the original water spraying system of the mine, have wide sources, do not generate any harmful gases, and are non-toxic and tasteless; and the compound dust suppression agent is convenient for construction, and has better dust suppression effect of respirable dust in comparison that of the prior art.

The invention provides an intelligent sensor capable of monitoring respirable dust, relating to an intelligent sensor which is used for detecting dust concentration of a high-concentration dust operating environment and carrying out acquiring and remote monitoring networking in real time. The intelligent sensor comprises a dust sampling separating template, an infrared monitoring module, an RAM (Random Access Memory) microprocessor module, a communication module and a power supply module. The intelligent sensor can be used for acquiring dust data in industrial and mining enterprises and detecting the operating environment. Aiming at the current situation and the demand of dust monitoring in the industrial hygiene field in China, the dust sensor is designed, thus the technical blank of thefield is made up, and an advanced detection technology is provided for the security control department.

The invention discloses a compound foaming agent used for depositing dust and a preparation method thereof. The compound foaming agent is prepared from following materials by weight: 5-8 parts of an alkyl polyglucoside, 20-25 parts of a fatty alcohol-polyoxyethylene ether, 9-14 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 1-2 parts of 2-ethyl hexyl succinate sodium sulfonate and 51-65 parts of water. The compound foaming agent has advantages of good acid and alkali resistance and hard-water resistance, strong foaming capability, fine and rich foams, small bubble sizes, moderate stability, large dust contacting area, good adhesiveness and wettability, enhanced dust depositing effects, enhanced capturing capability for respirable dust in particular, no toxicity, no harm, no skin irritation, rapid and complete biodegradation, selection of raw materials common in market and low cost. The compound foaming agent has wide applicability in the field of dust deposition using foams.

The invention discloses a mining bubble atomization water mist dust settling device. On the basis of traditional water mist dust settling of a mine, the mine atomizing dust settling device which is good in atomizing effect, high in dust settling rate, low in water consumption and air consumption, not prone to nozzle blockage, convenient to install, capable of saving energy and environmentally friendly is designed according to the bubble atomization principle. The mining bubble atomization water mist dust settling device is mainly characterized in that by means of an existing underground dustproof pipeline and a compressed air pipeline, a water source and an air source do not need to be pressurized, and no strict requirement for the size relationship of water pressure and air pressure exits; on the basis of not conducting any changing or adding auxiliary devices, water mist good in atomizing effect is produced, dust settling effect is greatly improved, and remarkable effect can be achieved for preventing and treating respirable dust; meanwhile, plenty of water sources is saved, and underground working conditions are effectively improved; when dust settling is conducted in places such as coal faces and driving faces with large gas gushing amount, part of air carried in the water mist can have an effect on diluting gas and preventing local gas from exceeding the limit to a certain extent.

The present invention provides a cannabinoid inhaler, compositions, and methods for delivering a cannabinoid composition to a subject. The cannabinoid composition is delivered in the form of inhaled droplets of respirable size via pulmonary administration. The invention may be used in the treatment of a condition or disorder selected from the group consisting of neuropathic pain, cannabis addiction, nausea, motion sickness, arthritis, and neurodegenerative disease.

A three-stage dust sampler makes use of a porous foam as the impactor substrates. The sampler includes an annular inlet which conforms to ISO / CEN / ACGIH inhalable sampling criteria, two impactor stages to classify thoracic and respirable particles and a final filter to collect respirable particles after the impactors. For 100 ppi polymer foam substrates, and a flow rate of 3.2 lpm, the collection efficiency curves of the thoracic and respirable dust matches ISO / CEN / ACGIH criteria when the jet-to-plate distance is 1.0. The cut-off aerodynamic diameter is 9.6 and 4.0 μm for the first and second impactor stages, respectively, and √{square root over (stk50)} is 0.39 for both stages. The collection efficiencies for solid particles is equal to that for liquid particles, indicating that there is no solid particle bouncing from the foam substrates.

The invention provides a personal respirable dust sampling device. The personal respirable dust sampling device comprises a sampling box, a filter screen, a sampling filter membrane and a driving device, wherein the sampling box is used for providing an installation space for a sampling component; the filter screen is installed inside the sampling box, comprises a rough filter screen used for filtering out particles exceeding the dust sampling standard, and a fine filter screen used for filtering dust conforming to the sampling standard in a grading manner; the sampling filter membrane is installed at one end of a gas outlet of the fine filter screen and is used for adsorbing filtered dust and is taken as an analysis sample of dust content; the driving device comprises a driving motor and a driving shaft which simultaneously penetrates through axle lines of the rough filter screen and the fine filter screen to drive the rough filter screen and the fine filter screen to simultaneously rotate. According to the device, the technology of combination of impact type separation and a double-layer conical surface filter screen is adopted, the dusty environment is sampled, large granular dust can be separated firstly by utilizing the rough filter screen, and then respirable dust conforming to the regulations of a BMRC sampling efficacy curve is separated by utilizing the fine filter screen, so that the sampling precision is improved.

The invention discloses a wet-type blower fan foam whirling current dedusting treatment device, which comprises a foam generation apparatus, a dedusting blower fan, a dedusting / demisting treatment device amd a foam injection apparatus arranged at an air inlet of the dedusting blower fan. The treatment device uses a principle of performing foam dedusting, de-watering and demisting by high-speed rotating spiral airflow and performing eddy flow centrifuge dewatering to perform high efficiency separation on a dust-water mixture in air flow. A special filter screen structure of the dedusting / demisting processing apparatus form eddy current rotation of ventilating current and form viscous liquid film on the filter screen, strong dust adsorption is carried out to realize high efficiency separation of the dust-water mixture, so that multistage dust depositing effect can be reached. The dedusting efficiency can reach more than 99%, dedusting efficiency of respirable dust can reach 95%, processing maximum air flow can reach 900m<3> / min, the processed ventilating current enable dust and mist-free cleaning, and work environment of safe production under well can be ensured.

This invention refers to innovative water sprays applications to significantly improve coal and quartz dust control around a continuous miner Significant dust control is achieved through utilizing different types of sprays at locations on the top and sides of the miner chassis to create water curtains or shrouds of water around zones of high dust concentration and zones of high concentration dust transport. This is called “multiple lines of defense” spray system (MLD.) This invention also provides a method of reducing dust around a continuous miner by configuring a spray system, located at the top or sides of the cutter boom, thereby improving control of respirable dust.

The invention discloses a co-mining tunneling method of seam roadway gas. The port of a roadway is sealed to form a sealed space, therefore air outside the roadway can not enter the space, so that the concentration of the gas in the roadway is above 20%, the concentration of the oxygen in the roadway is lower than 12%, and gas loses explosion capability. A drawing pipe is connected to release high-concentration gas released in a working space. In order to prevent high pressure from forming when coal and gas extrude in the roadway, a circular arc-shaped pressure relief roadway is dug on the opening end of the roadway, and high-pressure gas generated by extrusion can be removed. An air conditioning system is arranged in the roadway to guarantee proper environment in the roadway, and workerswork in the sealed space under the condition of prepared safety protection. By utilizing the roadway tunneling method, the problem of gas explosion is fundamentally solved, fire hazard danger is alsoeliminated, and the damage to a human body caused by respirable dust is eliminated; and meanwhile, because the roadway does not have explosion danger, so that the co-mining tunneling method provided by the invention has no anti-explosion requirement on equipment, and has a good popularization value.

The invention discloses a simulation system used for safety and health of industrial and mining environment dust occupational diseases and an industrial and mining environment dust simulation method. The simulation system and the simulation method can realize simulation of an industrial and mining dust environment; simulation of each influence factor of an operating environment is realized by virtue of an axial flow fan, a dust emitter, a noise simulator, a temperature regulator, an air pressure controller and a humidity regulator mainly; determination analysis of each influence factor in the environment is realized by virtue of a dust sampler, a temperature sensor, a humidity sensor, an oxygen content sensor, an atmosphere sensor, a toxic and harmful gas sensor, an air speed sensor and the like; finally two analysis methods that a human respiratory organ simulator is used for simulating human respiration and organs of a mouse are used for damaging the simulation are utilized for analyzing health condition of personnel in factors and under conditions of different dust environments, temperatures and humidities, ambient pressures, oxygen contents and the like, a damage mechanism of respirable dust in the industrial and mining dust environment on a human respiratory system and deposition law of the respirable dust can be obtained by combining with animal anatomy, and finally a dust pathogenic mechanism is revealed.

The invention relates to an unpowered dust removal device which is characterized in that a material guide groove is arranged between an uploading belt and a downloading belt, the material guide groove is communicated with a catching groove above the downloading belt, and the dust removal device is provided an ash cyclic channel which is communicated with the material guide groove and is in the shape of a Chinese character 'Hui', a plurality of external cyclic dust chambers and a plurality of dust blocking curtains; the material guide groove, the ash cyclic channel in the shape of a Chinese character 'Hui' and the external cyclic dust chambers are sequentially arranged on the catching groove above the downloading belt, and the bottom of the dust removal device is communicated with the catching groove above the downloading belt; and the interior shape of the external cyclic dust chambers can be a right angle, an obtuse angle, an acute angle, a semicircle or a 3 / 4 circle. The unpowered dust removal device realizes multi-way synchronous dust removal, solves the problem of deflagration in the process of coal transmission and dust removal, and enables the dust removal effect to meet the requirements of GB16248-1996 Health Standard for Respirable Dust in the Air of Workplace.

The invention discloses an environment-friendly type dust capturing agent and a preparation method thereof. The capturing agent is composed of the following compositions in percent by mass: 10-20% of poly(amino acid) or poly(amino acid salt), 10-20% of an amino acid surfactant, 1-5% of an quaternary ammonium salt, and the balance water. The advantages comprise that the dust capturing agent is nontoxic in composition and completely degradable by nature microbes, and does not cause pollution to soil and underground water after being directly discharged. The agent is easy to dissolve in water, and can be directly sprayed for usage by utilizing an original water spraying system of a mine. The dust capturing agent has the dust removing rate on total coal dust up to 95% or more, and has the dust removing rate on respirable dust up to 90% or more. The agent has corrosion-resistant and sterilization effects, and is capable of improving the environment in mine tunnels. The agent has certain gathering and cladding effects on dust, enables mineral dust to form relatively large particles, and is insusceptible to cause secondary dust rising after drying is performed. The agent is capable of improving the downhole operation environment, reducing dust damage and promoting safe production.

The invention discloses a polynary ionic wetting agent for inhibiting mine dust and a preparation method thereof, which are applied to the inhibition of a lot of dust produced during the production ofa mining working face of a mine. A variety of anionic, cationic, nonionic and neutral ionic surfactants are first isotropically combined and compounded, then anisotropically cross-compounded, added with water, put into a chemical reaction kettle and agitated under 120 DEG C for 2 hours while pressure is kept at 0.8MPa; inorganic salt is added to improve the ionized characteristic of the mixture,and agitation is carried out for 1 hour; adhesive is added to improve the capturing capability of mixture droplets, curing and reinforcing agent is added to increase the suspension period of the droplets in the air, and agitation is carried out for 2 hours; imidazole ionic liquid is added as an additive, agitation is carried out for 1 hour, the mixture is depressurized, cooled and taken out of thekettle, and thereby the polynary ionic wetting agent is formed. The wetting agent can greatly improve wetting capability and capturing capability on respirable dust and prolong the suspension life ofdroplets; the mine dust suppression cost is low, skin cannot be injured, machine corrosion is little, and the polynary ionic wetting agent has good applicability and environment-friendliness.

The invention relates to an atomizer for air dust prevention and dustfall, humidification and temperature reduction. The atomizer adopts a split assembled design and comprises a water rotator, a gas rotator, a pressing cap, a main body, a locking cap, a regulating rod and the like. The atomizer uses compressed air as power to atomize water and can efficiently atomize the water by the special design of the water rotator and the gas rotator. Dispersity, the action range and waterdrop movement speed of mist generated by the atomizer are suitable for capturing settled respirable dust. The atomizer is provided with a regulating device; and by rotating the regulating rod, the atomizing state can achieve the optimal application effect.

The present invention relates to a liquid-phase dust removing system and a liquid-phase dust removing method of pyrolysis coke-oven gas. The system comprises a venturi washer, an oil washing tower and a pressure reducing tower, wherein the tar and the dust in the coke-oven gas are condensed into the washing oil through the quenching cooling of the Venturi washer and the cooling dust removing of the oil washing tower, and the dust-containing washing oil is subjected to pressure reducing distillation to obtain the qualified tar product. According to the present invention, the system has characteristics of simple design, stable operation, economy, efficient and good safety, the dust removing method has characteristics of simpleness, high dust removing efficiency and stable and reliable dust removing effect, the quinoline insoluble substance content in the product oil can be less than 0.5%, the quinoline insoluble substance content in the dry coal gas is less than 1%, and the high concentration dust-containing heavy oil is circulated to the reactor so as to be subjected to pyrolysis again, such that the good dust removing purpose is achieved.

The invention relates to a froth dedusting agent used in mine, belonging to the field of coal mining, and is suitable for coal mine underground mining dedusting, metallurgical mines mining dedusting and digging tunnel dedusting. The forth dedusting agent comprises 10 to 20 percent of dodecyl benzene sulfonate, 2 to 5 percent of succinic acid diester sulfonate, 4 to 8 percent of CDEA, 1 to 2 percent of addition agent and water. The mine dedusting agent has the advantages of high frothing percentage, long dedusting time, simple technical process and operation, no corrosion action or toxicity and side effect of the independent components and the solution and good dedusting effect, the dust laying rate to all dust can reach above 95 percent, and the dust laying rate to respirable dust can reach above 85 percent. The dedusting agent can improve the operating environment of underground working face effectively and has good effect on reducing dust hazard and realizing safe production.

The invention discloses a dust control system and method for a thermal power plant. The system comprises a base, a water supply system, an air supply system, a two-phase flow nozzles and an air suction pipeline and is characterized in that a settling chamber is formed in the base, the two-phase flow nozzles are arranged at the top of the settling chamber, the water supply system and the air supply system are communicated with the two-phase flow nozzles, the air suction pipeline is in butt joint with the air inlet end of the settling chamber, and a fan is arranged on the air suction pipeline. The dust control system has the advantages that sprayed water mist can reach the micron size by regulating air supply and water supply pressure, water mist quantity is changed by regulating the use number of the nozzles, the wetting property of the water is changed by adding surfactant, the sprayed micron-sized water mist collides with and wraps dust to allow the dust to settle, and a spray dust removing effect is achieved; the dust control system is low in cost, low in energy consumption, evident in air purification effect and especially suitable for the purification of the air of an environment with respirable dust.

The invention relates to an intelligent air-water spraying control dust falling device for the blasting of coal mine. The device comprises a valve bank control system, a spraying air-water mixing cavity and nozzles. The bottom of the valve bank control system is connected with a pressure water source and a pressure air source through a pipeline respectively. A shock wave receiving plate close to the top is arranged on the right end face of the valve bank control system. A mechanically-controlled pneumatic valve connected with the valve bank control system is arranged below the shock wave receiving plate. The top of the valve bank control system is connected with the spraying air-water mixing cavity through a water duct and an air delivery pipe. A plurality of nozzles are arranged to form a sector on the right end face of the spraying air-water mixing cavity. According to the dust falling device, the dust concentration, particularly the concentration of respirable dust, of a blasting working surface can be effectively reduced, and a high-concentration gas generated in a heading process can be blown away by pressure air to be prevented from being accumulated on a heading end; and flame generated by the blasting is eliminated, so that the dust falling device can be conveniently used for various sites of the coal mine, and has a multifunctional effect.

Belonging to the field of blast mining, the invention specifically relates to a mining high efficiency blister mud dedusting additive, which is composed of 15-25% of a JFC penetrating agent, 5-10% of superabsorbent resin, 0.4-2.5% of sodium dodecyl sulfate, 1.0-1.5% of a metal washing agent, 0.5-1.0% of sodium hexametaphosphate, and the balance water. The additive is prepared by the steps of: first adding 5-10% of superabsorbent resin into a solvent and stirring them to form a homogeneous solution; then adding 15-25% of a JFC penetrating agent and 0.4-2.5% of sodium dodecyl sulfate into the above saturated solution in proportion; and adding 1.0-1.5% of a metal washing agent, 0.5-1.0% of sodium hexametaphosphate, and the balance water into the mixture, and continuing stirring for half an hour. With strong dedusting capability, the additive of the invention has a comprehensive dedusting rate up to over 80%, and the removing rate for respirable dust less than 5 micrometers can reach over 70%. Thus, the additive provided in the invention is suitable for dedusting in mine exploitation and stone removal, as well as coal mine explosion and exploitation.

A three-stage dust sampler makes use of a porous foam as the impactor substrates. The sampler includes an annular inlet which conforms to ISO / CEN / ACGIH inhalable sampling criteria, two impactor stages to classify thoracic and respirable particles and a final filter to collect respirable particles after the impactors. For 100 ppi polymer foam substrates, and a flow rate of 3.2 lpm, the collection efficiency curves of the thoracic and respirable dust matches ISO / CEN / ACGIH criteria when the jet-to-plate distance is 1.0. The cut-off aerodynamic diameter is 9.6 and 4.0 μm for the first and second impactor stages, respectively, and √{square root over (stk50)} is 0.39 for both stages. The collection efficiencies for solid particles is equal to that for liquid particles, indicating that there is no solid particle bouncing from the foam substrates.

The invention provides a centralized-control type bubble atomizing dust removal device and method for tunnel respirable dust. An air compressor is connected to a gas inlet pipe and a gas storage tank. The gas storage tank is connected to a liquid storage tank and a gas side check valve. The rear end of the gas side check valve is sequentially connected with a rotor flow meter, a gas side needle valve and a gas side pressure gauge. One side of the liquid storage tank is connected to a water inlet pipe, and the other side of the liquid storage tank is sequentially connected with a filter, a plunger pump, a liquid side check valve, an electromagnetic flow meter, a liquid side needle valve and a liquid side pressure gauge. The rear end of the liquid side pressure gauge and the rear end of the gas side pressure gauge are together connected to a bubble atomizing spray nozzle. The devices between the gas side check valve and the gas side pressure gauge and the devices between the liquid side check valve and the liquid side pressure gauge are all installed in an instrument control box in a centralized mode. Thus, parameters in the dust removal device are adjusted and controlled more easily, rapidly and conveniently; lots of micro-grain-size fog drops are formed after atomizing is conducted through the bubble atomizing spray nozzle, a good collision effect is achieved for respirable dust floating in alleys, the dust removal efficiency is high, and the space safety and environment quality of coal mine alleys are improved.

The invention discloses a comprehensive treatment method of dust produced during coal cutting against wind by a coal cutter in a fully-mechanized coal mining working face. Firstly, a first spraying device is utilized to wet front and rear rollers of the coal cutter and nearby caved fragmentized coal bodies; then a dust blocking curtain, a second spraying device and a third spraying device are utilized to guide flying dust to move downward along one side of the coal wall; a fourth spraying device and a fifth spraying device are utilized to intensively and efficiently purify high-concentration dusty airflow guided to one side of the coal wall to move; and lastly, a sixth spraying device is utilized to settle the escaped dust. The whole dust falling efficiency reaches 90% or above, the respirable dust falling efficiency reaches 85% or above, and finally the effective treatment of the dust during coal cutting against wind by the coal cutter is achieved.

The invention discloses high-pressure fine water mist dust removal equipment which comprises a rack, a motor, a water pump, a water tank, a water pipe assembly, a nozzle, a demisting cover and a fan. Air passes through the rack of the dust removal equipment and then flows to an outlet under the action of the fan, in the rack, the motor rotates to drive the water pump to pump water in the water tank into the water pipe assembly, then water mist is sprayed out of the nozzle to be mixed and in contact with air, the water mist collides with air to absorb harmful particles in air, and the function of purifying indoor air is achieved. In addition, the water mist is condensed into water when passing through the demisting cover, so that no water mist enters air at the outlet end, the dust removal effect is good, and the collection efficiency of respirable dust is improved to above 80% from original 35%. The PM2.5 concentration of the purified air is remarkably lowered.

This invention refers to innovative water sprays applications to significantly improve coal and quartz dust control around a continuous miner. Significant dust control is achieved through utilizing different types of sprays at locations on the top and sides of the miner chassis to create water curtains or shrouds of water around zones of high dust concentration and zones of high concentration dust transport. This is called “multiple lines of defense” spray system (MLD.) This invention also provides a method of reducing dust around a continuous miner by configuring a spray system, located at the top or sides of the cutter boom, thereby improving control of respirable dust.

The invention discloses a moisture absorbing and water retaining type mining foam generator and a preparation method thereof. The mining foam generator is prepared from the following components by mass percent: 0.1-0.2% of fatty alcohol polyoxyethylene ether, 0.05-0.1% of sodium secondary alkyl sulfonate, 0.2-0.4% of octadecyl trimethyl ammonium chloride, 0.02-0.03% of fatty acid diethanolamide, 0.03-0.05% of amine oxide, 0.2-0.3% of potassium lauryl ether phosphate, 0.1-0.2% of dioctyl sodium sulfosuccinate, 0.1-0.2% of sodium chloride, 0.05-0.1% of sodium carboxymethyl starch, 0.01-0.04% ofsorbitan monooleate polyoxyethylene ether and the balance of water. The potassium lauryl ether phosphate, the dioctyl sodium sulfosuccinate, the sodium chloride and the sodium carboxymethyl starch which can improve foam wetting property are added into the mining foam generator, so that the dust catching ability of foams is effectively improved. The foam generator has higher wettability and solubility; the foams generated by the foam generator are not easily broken, thus better covering and removing dust; the foam generator is high in interception efficiency especially for respirable dust, is high in moisture absorbing and water retaining capacities, and prevents secondary flying dust, thus creating a good working environment and being free from toxic and side effects on a human body.

The invention discloses a movable type mining wet vibration wire and cyclone dust collector. The movable type mining wet vibration wire and cyclone dust collector comprises a cylinder (8), a flow connection air inlet (1) and a fan (7), wherein a high-pressure spray device, a vibrating grid plate (4) and a cyclone device are mounted in the cylinder (8) sequentially; the high-pressure spray device comprises a high-pressure water supply pipe (2) and high-pressure nozzles (3) distributed on the high-pressure water supply pipe (2); the cyclone device is formed by oppositely combining two cyclone blades (5) with identical shape and opposite directions. The cylinder (8) is mounted on a support mechanism (11), and rollers (12) are mounted at the lower part of the support mechanism (11). The movable type mining wet vibration wire and cyclone dust collector has the advantages of being high in dust collection efficiency, low in resistance and energy consumption, small in size, low in treatment cost and easy to run and maintain and can be widely applied to treatment of dust, especially respirable dust on a working face and in a roadway in a mine pit.

The invention relates to a coal mine underground dust removal device, and belongs to the field of dust removal. The coal mine underground dust removal device and dust removal method comprise an ejector, a pneumatic fan, a mixing cylinder, a dust removal chamber, a filter polygonal cylinder, an outlet chamber and a movable bracket, wherein the air flow is used to drive the pneumatic fan to rotate from an air flow inlet and a compressed air inlet; an air injection of a dry mist nozzle is carried out by the ejector, the water flow is connected with the dry mist nozzle, a spray is formed in the pneumatic fan, and the mixing cylinder and the dust removal chamber through the gas-liquid mixing; polluted air is sucked into the cylinder from the outside; at the same time, the air flow in the ejector ejects the polluted air from the air inlet to the dust removal chamber; through the dust removal by the adsorption of the dry mist, the dust removal of the polygonal net filter cylinder, and the dedusted air enters the outlet chamber through a filter cylinder outlet to be discharged finally; and the filter cylinder rotates while the aircurrent enters, and dust particles attached on the filter cylinder net is dropped into a dust discharge groove and discharged from a dust discharge opening. The coal mine underground dust removal device and the dust removal method are high in dust removal efficiency, small in volume, convenient to operate, capable of moving, simple in structure, low in dust removal, and the respirable dust is thoroughly treated.

The invention belongs to the technical field of the dust removal device used for an underground coal mine jumbolter, in particular to an integrated vacuum negative-pressure three-level dust removal system. The integrated vacuum negative-pressure three-level dust removal system solves the problem that the traditional dust removal equipment cannot satisfy the use requirement of a low-rise jumbolter. In the integrated vacuum negative-pressure three-level dust removal system, a cyclone and a dust removal tank are integrated, the dust removal tank and a power device are integrated, and three-level dust removal of cyclone dust removal, gravity dust removal and filter element dust removal is integrated in the dust removal tank. The integrated vacuum negative-pressure three-level dust removal system has the beneficial effect that the dust removal tank combines various dust removal mechanisms into a whole, and the dust removal tank and the power device are integrated into a whole. Therefore, the integrated vacuum negative-pressure three-level dust removal system is novel dust removal equipment which has the advantages of compact structure, small volume, small land occupation and light weight, is convenient to move and maintain and especially has higher dust removal efficiency for respirable dust, the reliability of the dust removal system is effectively improved, the dust removal efficiency is greatly improved, and the working environment of workers is effectively improved.

The invention discloses a dust sampling and incremental control system which is characterized by comprising a filtration membrane sampling device, a laser optical measuring device and a mixed signal processor, wherein the filtration membrane sampling device comprises a sampling head, a flow sensor and an air pump I, the sampling head is connected with the air pump I, and the flow sensor is arranged between the sampling head and the air pump I; the laser optical measuring device comprises an optical sensor, an air filter and an air pump II, and the optical sensor is provided with a slit and a measurement chamber; and the flow sensor, the optical sensor and a temperature and pressure sensor are respectively connected with the mixed signal processor which is respectively connected with the air pump I and the air pump II. Compared with the prior art, the dust sampling and incremental control system has the advantages that the weight increment in dust filtration membrane sampling can be controlled through the optical measuring system, and thus the pass percent of dust samples is ensured; and the optical measuring system can respectively measure total dust concentration and respirable dust concentration.