571 results about "Coal storage" patented technology

The invention relates to a combined coal powder storage and supply system which comprises a coal powder storage tank, a weighing coal powder supply silo, a pulse-free coal powder supply device and a support; the coal powder storage tank is vertically arranged at the top of the support, the weighing coal powder supply silo is vertically arranged on the support below the coal powder storage tank, the pulse-free coal powder supply device is arranged below a discharging opening of the weighing coal powder supply silo, and a flexible connector in the center at the top of a sealing head of the weighing coal powder supply silo is connected with a discharging opening of the coal powder storage tank through a rotary valve; and a fluidization component is arranged on the outer wall of a conical hopper of the coal powder storage tank, and a coal powder anti-arching stirring device is arranged on a hopper of the weighing coal powder supply silo. The invention has compact structure, reasonable layout, automatic feeding and stable supply and can solve the problems frequently existing in the ordinary coal storage silo and the supply silo of birdnesting, bridging, rat hole, channeling, wall build-up, breakage, self combustion, and the like; and the invention can be widely used in any situation where the small and medium-sized industrial coal powder boilers are required.

The invention discloses an environment-friendly flame-retardant high-molecular gel inhibitor for preventing coal from spontaneously combusting of coal mine, which takes water as a solvent and comprises the following components with percentage concentration by weight: 7-10 percent of high-molecular base material, 0.1-0.5 percent of inorganic inhibitor, 0.1-0.5 percent of flame retardant agent, 0.01-0.5 percent of surface active agent and 0.1-3 percent of reinforcing agent. The environment-friendly flame-retardant high-molecular gel inhibitor has the advantages of simple operation, good wall-absorbing property and inhibiting effect, flame retardant property and environment protection; a coating layer can bear the action of flame for a plurality of times and has large mechanical strength, and a coating film is stable and does not fall off in the humid environment. In the process of coal mining, the inhibitor solution is sprayed to superficial coal and combustible areas behind a coal-mining working surface and the spontaneous combustion tendency of coal can be reduced, therefore, the environment-friendly flame-retardant high-molecular gel inhibitor prevents the spontaneous combustion of coal thoroughly and is applicable to the operation under a mine and coal storage.

The automatic control method for steel ball coal mill in thermal power plant adopts a double-layer control structure, including an upper layer of self optimizing algorithm and a lower layer of multidimensional fuzzy control algorithm. The self optimizing algorithm finds out the optimal inside coal storage quantity inside the coal mill, the optimal outlet temperature of the coal mill and the optimal inlet negative pressure value of the coal mill as the controlling set values; and the multidimensional fuzzy control algorithm realizes the automatic regulation of the coal feed quantity, the hot air valve opening, and the recirculating air valve opening or the cold air valve opening, so as to ensure the safe and reliable running of the steel ball coal mill system in optimal mode.

The invention discloses a coal mine underground mining, dress and filling integral method, which comprises the following steps that: a raw coal belt conveyor, a raw coal cabin, a raw coal feeding belt conveyor, a washing system, a cleaned coal belt conveyor, an underground coal storage cabin, a washed coal gangue belt conveyor, a digging coal gangue belt conveyor, a crushing machine, a coal gangue feeding belt conveyor, a coal gangue cabin and a filling coal belt conveyor are adopted; underground mined raw coal is subjected to dressing by washing by the washing system; cleaned coal subjected to dressing by washing is conveyed into the underground coal storage cabin and is hoisted onto the ground; and washed coal gangue obtained after the dressing by washing is crushed by the crushing machine and is then conveyed to a solid filling coal mining work surface for mine goaf filling. The mining, dress and filling integral method has the advantages that the safe and efficient exploitation under a railway, a water body and a building is realized; the mine auxiliary hosting pressure is reduced; the coal quality is improved; and the problems of ground occupation, pollution and the like caused by coal gangue discharge onto the ground are solved.

The invention relates to a method for extracting gas from a coal seam roof complex branched well, which comprises the following steps of: selecting a coal storage layer with the gas content larger than 8m<3>/t; determining the machine tunnel and the tail tunnel positions excavated by a working surface to be prepared, as the position of a horizontal well section of a complex branched well; confirming the layer position in which a fissure zone generated due to coal mining is located; respectively distributing the horizontal well section above a machine tunnel and a tail tunnel; confirming the positions of a well opening and a deflection point and realizing the angle gain of a large-curvature radius; by adopting a three-opening structure on a well body structure and adopting naked-eye structures for both the horizontal well and the branched wells, constructing a horizontal well section in a selected rock stratum; constructing the branched wells at both sides of the horizontal well section; constructing a downward branched well on the horizontal well section and drilling through the coal storage layer; installing extracting equipment for extracting gas; carrying out negative pressure extraction in the medium and later extracting phases for realizing one well with multiple purposes; and inspecting effects. The method is favorable for reducing the gas content, creating condition for safely and efficiently carrying out coal tunnel excavation and coal mining and really realizing one well with multiple purposes at the coal mining phase.

The invention discloses a combined separated layer fracturing, grouping and layer-combining mining method for a coal bed well group. The method comprises the following steps of: (1) arranging a roadway, and digging an mining roadway in a top coal bed or a coal bed top plate; (2) establishing a fracturing pump room on the ground, constructing vertical wells and connection roadways, and enabling the connection roadway to be connected with the vertical wells and the roadway in the top coal bed; (3) paving high-pressure resistant pipelines; (4) constructing downwards in the roadway of the top coal bed to form a test drill hole, testing physic parameters of each coal bed below the top coal bed through the testing drill hole; (5) grouping the multiple coal beds below the top coal bed based on the physic characteristics of a coal storage layer; (6) implementing a fracturing and mining unit. The combined separated layer fracturing, grouping and layer-combining mining method for the coal bed well group ensures scope of influence of hydraulic fracturing, reduces cost taken for digging wells, can efficiently avoid mutual interference of fluid flowing among coal storage layers due to too great difference of physic characteristics of the storage layers.

The invention relates to a method for pressing crack a coal bed pressing crack liquid, which sequentially comprises the following steps of: (1) selecting high-viscosity pressing crack liquid types used for the coal bed hydraulic cracking; (2) carrying out glue breaking experiments on pressing crack liquid adopted by chlorine dioxide indoors under the condition of the coal bed temperature and determining the minimum concentration of the chlorine dioxide; (3) determining the total quality of the chlorine dioxide according to the quantity of the pressing crack liquid and the concentration of the chlorine dioxide; (4) carrying out hydraulic pressing crack according to a procedure of prepad liquid, sand containing liquid and replacing liquid, wherein the chlorine dioxide added in the prepad liquid accounts for 70 percent, the chlorine dioxide added in the replacing liquid accounts for 30 percent, and not less than 10m<3> of active water or clean water is pumped and injected among the prepad liquid, the replacing liquid and the sand containing liquid for being used as isolation liquid; (5) starting to do pressing crack liquid backflow after the waiting for 2 to 4 hours from the completion of the hydraulic pressing crack; and (6) checking effects with the main indexes including the pressing crack liquid backflow quantity, the viscosity and the damage degree of the pressing crack liquid on the coal bed. The coal bed pressing crack liquid system has the advantages that the high-viscosity pressing crack liquid can realize fast glue breaking backflow at the coal bed temperature, and the damage to the coal storage layer is reduced.

The invention relates to an efficient drying and quality-improving device and method for brown coal. In the prior art, no efficient drying and quality-improving device or method for brown coal, which is used for improving the utilization value of the brown coal, exists. The efficient drying and quality-improving device is characterized by comprising a coal storage bin, a fuel bin, a hot blast stove, a cylinder-type dryer, a product bin, a cyclone dust collector, an electrical dust collector and a plurality of pipelines, wherein both the product bin and the coal storage bin are connected with the cylinder-type dryer; the cylinder-type dryer is connected with the cyclone dust collector; and the cyclone dust collector, the electrical dust collector, the fuel bin are all connected with the hot blast stove. The method is characterized in that the raw material of the brown coal is conveyed into the cylinder-type dryer from the coal storage bin; the hot blast stove generates high-temperature flue gas at the temperature of 700-900 DEG C, and the flue gas is conveyed into the cylinder-type dryer; the raw material of the brown coal is dried by the high-temperature flue gas and conveyed into the product bin from the cylinder-type dryer for sealing and cooling, so that the finished product of the brown coal is obtained after cooling. According to the device and the method, the moisture in the brown coal can be reduced substantially, and a part of ash content in the brown coal can also be reduced, so that the utilization value of the brown coal can be improved.

The invention relates to a method for treating waste coking oven gas desulfurization solution, comprising the following steps: (1) setting up a pipeline from a waste coking oven gas desulfurization solution tank (1) and to the top of a coal tower (3); (2) transporting the waste coking oven gas desulfurization solution to the top of the coal tower (3) by using a waste coking oven gas desulfurization solution pump (2); (3) arranging an annular spraying pipe (4) on the top of the coal tower (3), wherein each spraying branch pipe is provided with a valve and a spray nozzle; (4) spraying the waste coking oven gas desulfurization solution to all coal storage tanks which are arranged on the top of the coal tower (3) under the outlet pressure of the waste coking oven gas desulfurization solution pump (2), and mixing the waste coking oven gas desulfurization solution with coking coal; and (5) decomposing the waste coking oven gas desulfurization solution at the high temperature of 1100-1200 DEG C in a coking oven. The invention can solve the problem existing in the prior art that the waste coking oven gas desulfurization solution can be not treated harmlessly and thoroughly.

The invention discloses an accurate coal blending system of a silo. The accurate coal blending system comprises a coal blending silo, a raw coal in-silo belt conveyor, a silo roof material distribution machine, a coal blending silo bottom belt conveyor, a metering device and a finished coal out-of-silo belt conveyor, wherein a coal inlet of the raw coal in-silo belt conveyor is connected to a storage yard coal blending system, a coal outlet of the raw coal in-silo belt conveyor is connected with a coal inlet of the silo roof material distribution machine, the coal blending silo comprises a plurality of silo tubes, a coal outlet of the silo roof material distribution machine is connected with coal inlets of the silo tubes, coal outlets of the silo tubes are connected with a coal inlet of the coal blending silo bottom belt conveyor, a coal outlet of the coal blending silo bottom belt conveyor is connected with a coal inlet of the finished coal out-of-silo belt conveyor, and a coal outlet of the finished coal out-of-silo belt conveyor is connected with a finished coal storage yard or a shipment system. According to the accurate coal blending system disclosed by the invention, high-accuracy coal blending requirements are met, meanwhile, the coal blending is not limited by the number of storage yard material taking devices, and the coal blending requirements on four or more than four coal types can be met.

The invention discloses a high pressure conveyance gas recovery method which comprises a first storage tank, a second storage tank, a first locking hopper, a second locking hopper, a first feeding tank, a second feeding tank and a gas coupling tank. After the first feeding tank (second feeding tank) correspondingly receives a batch of power from the first locking hopper (second locking hopper), the first locking hopper (second locking hopper) is separated from the first feeding tank (second feeding tank). The first locking hopper is opened for equalizing pressure with a communication valve of the gas coupling tank, after pressure is balanced, the second locking hopper is opened for equalizing pressure with the communication valve of the gas coupling tank. When pressure of the first locking hopper, the gas coupling tank and the second locking hopper is balanced, the gas coupling tank is isolated, gases are discharged into a powdered coal storage tank so that a filter is used for discharging pressure of the first locking hopper, and meanwhile, pressure conveyance gases are used for punching the second locking hopper. According to the high pressure conveyance gas recovery method, conveyance gases can be partly recycled, energy dissipation is reduced, and recovery use ratio of conveyance gases is 50% compared with a single system.

The invention discloses an intelligent coal yard monitoring method and system. The steps of the method are as follows: S1, dividing the coal yard into regions; S2, stockpiling material: the coal material is piled in different areas according to the actual needs according to the divided areas; S3, stockpile counting: the coal is divided into storage spaces according to the batches, the stacking density is calculated, and all the information of the batch of coal is related to the stacking position; S4, reclaiming material: reclaiming material in different regions according to requirements from the designated area of the stacking yard; S5, retrieval counting: the actual coal retrieval amount of this batch of coal retrieval is counted once, and the current coal storage state of the coal yard is counted and determined. The system is used to implement the method described above. The invention has the advantages of high automation degree, realizing intelligent real-time monitoring, good monitoring effect and the like.

The invention relates to a steam power plant which consists essentially of a steam generator (1), a turbo group comprising a condensing steam turbine (2) and generator (3), a water-cooled condenser (4) and a bled-steam-heated preheating system. In said steam power plant all components, including the fuel storage area (6), are situated at ground level and in the open air. The turbo group (2, 3) and the condenser (4), the preheating system with associated pumps and the transformers (7) are arranged such that a gantry crane is able to pass over them. The steam generator (1), flue gas cleaning system (16) and the chimney (17) are positioned in a row along a common flue gas axis (18) and the turbo group (2, 3) arranged in the immediate vicinity and parallel thereto. As seen from the main wind direction (9), the coal storage area (6) is positioned downwind from the turbo group (2, 3) and the steam generator (1).

The invention relates to a method for safety seal and flow delivery in the technique of the gasification of dust coal. It uses choke damp or flue gas to pressurize and seal safely the dust coal storage bin, and then uses choke damp to lock bucket the dust coal and to pressurize the dust coal feed bin, in order to transport the dust coal to gasification stove, temperature of said choke damp using to pressurize the feed bin being from normal temperature to less than 100 Deg. C, and pressure being 0.1-6.9 MPa. Using the specified choke damp to substitute nitrogen as power carrier of air conveying doesn't leaven the quality of the prepared synthetic gas or increase the content of nitrogen except the nitrogen carried by coal, available composition of the gas being high; using choke damp to substitute nitrogen as the gas for safety seal realizes the rational use of resource, for the limited choke damp carried with dust coal can generate non-catalytic reaction and getting corresponding product gas after it into gasification stove.

The invention discloses an environmentally-friendly multifunctional dust suppressant and a preparation method thereof. The environmentally-friendly multifunctional dust suppressant comprises the materials in percentage by weight: 0.05-2.50% of carboxymethylcellulose, 0.05-2.50% of chitosan, 0.1-0.5% of acetic acid, 0.25-1.00% of glycerol, 0.05-0.15% of sodium alkyl benzene sulfonate, 0.01-0.05% of copper sulfate, 2-20% of magnesium chloride and the balance of water. The dust suppressant provided by the invention is remarkable in dust suppressant and loss preventative effect. Compared with other dust suppressants, the preparation method has the following advantages: the machining process is simple and convenient, the cost is lower, the dust suppressant time is long, the performance cost ratio is high, and the components are independent. The liquor of the dust suppressant is free from any toxic and side effects and corrosive effect, and the dust suppressant can be biodegradable and is free from any secondary pollution. The dust suppressant provided by the invention can be widely applied to the fields of construction sites, cement plants and coal storage and transportation and dust suppression.

The invention relates to a steam coal preparation technique with low coal slime yield, comprising the following steps of: (1) storing the raw coal of steam coal in a horizontal cabin, wherein the height of coal storage is less than 10 m; (2) crushing the raw coal less than 200 nm by using a grading crusher; (3) feeding the raw coal into a bolting mill for milling after crushing, wherein the coal with big screening size enters a lump coal washing system for washing, the fine coal powder with small size is then sieved, and the fine powder less than 6 nm after sieving directly enters a product cabin; and the remaining slack coal enters a non-pressure dense media swirler for washing and de-liming. The technique can wash all the steam coal with relatively lower cost; the coal slime yield is reduced; and the calorific value of washed steam coal product is increased.

The invention provides an oily liquid and oil state dust preventive composition, a preparation method and purpose for preventing dust from flying. The dust preventive composition comprises the following components per 100 parts by weigh of oily solution: 50-80 parts by weight of oily liquid acrylamide copolymerized high-molecules prepared by copolymerization of acrylamide monomers, and 2.0-10.0 parts by weight of surfactant with emulsification and dispersion functions, and 5.0-30.0 parts by weight of hygroscopic oil with dispersion and moisture evaporation inhibition function, and 0.2-10.0 parts by weight of one or two kinds of natural high-molecules with good dust adhesion strength or adhesion maintenance force. In the yellow sand region, tunnel, subway, mine, coal storage field, sand storage field, road and building sit with many dust, and a certain amount of dust composition can be diluted and stirred in water for sprinkling, because of differences of adsorption, viscosity, density and polarity, after the composition is coated on flying dust surface, the dust, the granular form dust and fine dust and other dusts can be prevented from flying.

A system and a method for active fire extinguishing and explosion suppression in coal mine workplaces are especially suitable for monitoring, early warning, and actively inserting and inhibiting in spaces that are prone to fire and explosion hazards, and the spaces comprise coal mine workplaces that generate gas and coal dust, and gas and coal dust accumulated areas in coal storage bunkers, and the like. Quantitative evaluation of environmental space explosion hazard degrees is obtained by the system through active monitoring and comprehensive evaluating of a plurality of parameters such as gas composition, dust concentrations, ambient temperature, photoelectric signals, etc. in a working environment, thereby providing theory criteria for action execution of explosion suppression mechanisms. According to the invention, real-time monitoring of environmental parameters of gas and coal dust in workplaces and advanced quantitative determination of explosion hazard degrees are realized, and therefore effective explosion suppression measures are adopted proactively before an explosion hazard occurs, and the probability of successful execution of explosion suppression is increased.

The invention discloses a dust-removing air supply sprayer provided with a silencer, belonging to the technical field of an air supply sprayer. The environment-friendly dust-removing air supply sprayer provided with the silencer has the technical key points that the environment-friendly dust-removing air supply sprayer comprises an axial flow fan; an air outlet arranged in front of the axial flow fan is connected with a spray cylinder; a silencing ring is sheathed in the spray cylinder; the external diameter of the silencing ring is less than the internal diameter of the spray cylinder; a silencing area is formed between the spray cylinder and the silencing ring; and the silencing area is internally filled with sound absorption cotton. The invention aims at providing the dust-removing air supply sprayer provided with the silencer, which is compact in structure and good in use effect; and the environment-friendly dust-removing air supply sprayer is used for removing and inhibiting dust for the dust pollution caused by a large open coal mine and fugitive dust emission pollution caused by coal storage yard, transportation, crushing and the like.

The invention discloses a method for displaying fired coal quality in real time. The method comprises the following steps: searching for demanded measured point data from an SIS (Safety Instrumented System) system by a measured point base via a thermal power plant system and storing searched demanded measured point data; analyzing demands by an index base according to working conditions, acquiring one or more measured point data from the measured point base, calculating index data according to an index formula and measured data acquired from the measured point base, and transmitting the generated index data to a typical working condition index database; in real time processing and updating coal storage information of each coal bunker by a real-time coal storage information management device according to the index data, wherein the coal storage information involves in beginning and terminating time of coal bed formation; acquiring the corresponding coal quality information of the coal bed including real-time fired coal by matching the beginning and terminating time with the manually inputted coal supply information, thereby obtaining the real-time fired coal heat value of the coal bunker. According to the displaying method, coal quality conditions at present and after some time can be absolutely clear.

Disclosed is a high-temperature water source heat pump unit. Single-step compression refrigeration cycle and cascaded refrigeration cycle combined linkage technology is adopted, temperature of outgoing water of the unit can be increased to be higher than 85 DEG C by utilizing a low-temperature heat source to lower a compression ratio of the unit under a high-temperature working condition, efficiency of the unit is improved, working conditions of compressors are improved, and running reliability of the unit under the high-temperature working condition is guaranteed. The high-temperature water source heat pump unit is composed of a first compressor, a first heat exchanger, a first throttling element, a liquid storage device, a first one-way valve, a second one-way valve, an intermediate heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a second compressor, a second throttling element, a second heat exchanger and a connecting pipeline. By the high-temperature water source heat pump unit, high environmental-protection benefit and economic benefit can be achieved, waste gas and waste residues of a coal fired boiler are avoided from polluting surrounding environment, and coal transporting cost, coal storage site cost, dedusting cost, coal slag transporting and processing cost and the like are omitted; investment in building a heating system is saved, and the high-temperature water source heat pump unit is especially suitable for being used for building a central air conditioning heating system in northern cold areas.

The invention belongs to a coal gasification device and process capable of combusting organic effluent sewage. The coal gasification device comprises an organic effluent sewage storage tank, an oxygen storage tank, a dry pulverized coal storage tank and a water storage tank, wherein the dry pulverized coal storage tank and the water storage tank are respectively connected with the inlet of a coal water slurry storage tank, outlets of the organic effluent sewage storage tank, the oxygen storage tank, the dry pulverized coal storage tank and the coal water slurry storage tank are respectively connected with a burner part at the top of a combustor; the burner part is connected with the interior of a membrane type water cooling film, the oxygen storage tank is connected with an oxygen and gas increasing nozzle arranged at the middle of the combustor through a pipeline, the water storage tank is connected with the inlet of the membrane type water cooling wall, a connecting cylinder is arranged at the bottom of the combustor, penetrates through the top of a water cooler and is arranged at the inner-upper part of the water cooler, a synthetic gas outlet is formed in the upper part of one side of the water cooler, a deslagging hole is formed in the lower part of the water cooler, and a multilayer baffling boosting cylinder is arranged at the outer part of the connecting cylinder. The coal gasification device has the advantages of strong coal type adaptability, high coal gasification efficiency, and cleanness and good quality of synthetic gas, and is capable of treating the organic effluent sewage.