32results about How to "Avoid clogging accidents" patented technology

The invention discloses an extraction method for coal bed gas in a composite old mined-out area formed through a lower tool post method. The method comprises the steps that a horizontal well is constructed at a middle rock layer between an upper old mined-out area and a lower old mined-out area, extraction is carried out, and the coal bed gas extraction amount within the unit time is recorded as Q1; when the extraction amount is decreased to be below 10-20% of Q1, fracturing is carried out for extraction again, and the coil bed gas extraction amount is recorded as Q2; when the extraction amount is decreased to be below 10-20% of Q2, fracturing is carried out again, and the extraction amount is recorded as Q3; when the extraction amount is decreased again to be 10-20% of Q3, carbon dioxide displacement is carried out; then, extraction is carried out again and not stopped until the extraction amount is decreased to 6 m<3> / min. By means of the method, the problems that only a ground vertical well drilling method is adopted for extracting the old mined-out area in the prior art, the effect contact area of an extraction drilling well and an old mined-out area storage layer is small, and the extraction range is limited are solved; sources near the upper old mined-out area coal bed layer are extracted together with lower old mined-out coal bed gas, and the cost is saved.

The invention discloses a method for exploiting coal bed methane in collapse old goafs and lower coal beds in a combined manner. The method includes surveying mines, constructing horizontal wells from the ground to intermediate rock strata of the old goafs and the lower coal beds, carrying out fracturing and extracting the coal bed methane; circularly carrying out extraction stopping-decompression extraction procedures when the unit-time coal bed methane extraction quantities are reduced and reach 20%-40% of Q<1>, and continuing to extract the coal bed methane; carrying out secondary fracturing when the extraction quantities are lower than 10% of the Q<1>, constructing drainage straight wells and arranging equipment to drain the coal bed methane; carrying out carbon dioxide gas displacement when the extraction quantities are reduced and are lower than 20% of Q<2>, and draining the coal bed methane; carrying out supercritical carbon dioxide displacement when the extraction quantities are reduced again and are lower than 20% of the Q<2>, draining the coal bed methane until the extraction quantities are reduced and reach 10% of the Q<2>, and stopping extracting the coal bed methane. The method has the advantages that coal bed methane resources in the old goafs and the adjacent coal beds can be extracted together by the aid of the method, accordingly, the cost can be saved, and the coal bed methane resources can be extracted to the greatest extent.

The invention discloses a method of synergetic extraction of coal bed gas of a tool post type mined area and a lower coal bed. The method comprises the steps that firstly, a mine is surveyed; after the floor failure depth is determined, a horizontal well is constructed; the coal bed gas of the mined area is extracted; when the extraction amount of the coal bed gas during unit time is decreased to 20-40% of Q1, the extraction pressure is decreased circularly so that coal bed gas extraction can be continued; when the extraction amount is decreased to 10-18% of Q1, supercritical CO2 is injected for displacement; when the extraction mount is decreased below 20% of Q1 again, oriented fracturing is conducted, a vertical discharge well is arranged on the other side of the horizontal well, and discharging equipment is arranged for conducting coal bed gas extraction; and when the extraction amount of the coal bed gas is decreased below 20% of Q2, the supercritical CO2 is used for displacement again, and extraction is stopped till the extraction amount is decreased to 10% of Q2. By the adoption of the method, coal bed gas resources close to a thin coal seam is extracted along with the coal bed gas in the tool post type mined area, and recovery of gas resources in abandoned still coal seams is achieved.

The invention relates to a flash suspension chlorination method for raw materials containing titanium. The flash suspension chlorination method includes the steps that a reaction furnace with a reaction chamber and an evacuation chamber is used for reaction, a partitioning plate is used for separating the reaction chamber from the evacuation chamber, and the bottoms of the reaction chamber and the evacuation chamber are communicated to form a U-shaped communicated structure; a reducing atmosphere condition is formed inside the reaction chamber, chlorine is used as carrier gas, and the raw materials containing titanium are sprayed into the reaction chamber from the top or the top side of the reaction chamber, the raw materials containing titanium and chlorine are kept in a stable suspension state inside the reaction furnace, and the temperature is stabilized below 500-1200 DEG C for reaction; a residue discharging opening is formed in the bottom of the reaction furnace, solid powder and fused adhesive impurities generated by the reaction are discharged from the residue discharging opening, and generated crude titanium tetrachloride products are collected at an outlet in the top of the evacuation chamber. The invention further discloses a chlorination reaction furnace device used for the reaction. According to the chlorination technology, the raw materials, containing titanium, high in CaO and MgO content can be used, and the problem that low-melting-point molten mass blocks equipment is solved.

The invention discloses an extraction method for mining formed composite old mined-out area coalbed methane through a lower caving method. The method includes the steps that coalbed methane extraction is conducted by constructing a horizontal well at the position 1-5 meters above a lower goaf fissure zone; when the extraction amount of the coalbed methane is dropped to 10-20% of Q, segmented crushing is conducted, extraction is conducted on the goaf coalbed methane again, and when the extraction amount of the coalbed methane is dropped to 10-20% of Q again, supercritical carbon dioxide is injected to drive and replace the coalbed methane; extraction is conducted again till the extraction amount is dropped to 6 m<3> / min, and extraction is stopped. By means of the method, the problems that when a ground vertical drilling well is separately used to conduct extraction on a goaf originally, the effective contact area between the extraction drilling well and a goaf reservoir is small, and the extraction range is limited are solved; while the coalbed methane of the goaf on the lower layer is extracted, the coalbed methane resource close to the upper portion of the goaf is also extracted, and cost is saved; meanwhile, the horizontal well is located in the rock stratum, and therefore shaft collapse and blocking of the drilling well in a coal seam are avoided.

The invention discloses a method for synergetic extraction of coal bed gas in a caving type gob area and a lower coal bed. The method comprises the steps that firstly, a mine is explored, a horizontal well is constructed from the ground to a base plate of the gob area, carbon dioxide is compressed into the well for cleaning, and coal bed gas extraction is carried out; when the extraction amount of coal bed gas in unit time drops to 20%-40% of Qi, running and stopping circulate, the extraction pressure is reduced, and the re-extraction process is carried out again; when the extraction amount drops to be below 20% of Qi, carbon dioxide is injected for replacement, and extraction is carried out again; when the extraction amount drops to be below 20% of Q1 again, the horizontal well and a coal and rock strata of the lower coal bed are subjected to fracture, and coal bed gas discharge and extraction are carried out; when the extraction amount drops to be below 20% of Q2, supercritical carbon dioxide replacement is carried out; and when the extraction amount drops to 10% of Q2 through extraction, extraction is stopped. By means of the method, synergetic extraction of coal bed gas in the carving type gob area and coal bed gas near a low coal seam is achieved, cost is reduced, and the coal bed gas resource is extracted to the greatest extent.

The invention relates to a recycling method for domestic waste incineration fly ash. A diverter device is installed at the lower end of the dust collector of the waste incineration flue gas treatment system to control the amount of fly ash that circulates into the medialess grinder and prevent the fly ash from agglomerating in the grinding medium or Bonding on the inner wall of the grinder affects the grinding effect. After the fly ash is crushed in the grinding chamber, the high-pressure centrifugal fan will bring the ground powder into the classifier, and the fine powder that meets the fineness requirements enters the circulation system with the airflow, Coarse particles that meet the fineness requirements are returned to the grinding bin to continue grinding, ensuring that the particle size of the ground fine powder is uniform and kept within a certain range, fully exposing unreacted calcium hydroxide, increasing the specific surface area of ​​fly ash, and improving fly ash. The utilization rate of calcium hydroxide in the ash is more than 80%, and continuous industrial production can be realized. At the same time, phosphate is added to the medialess grinder to pre-stabilize heavy metals, reduce the amount of subsequent deacidification agents, and play a grinding role; add strong oxidants to desulfurize and denitrify and promote the decomposition of dioxins.

The invention discloses a novel backwashing water intake system for a water purification building. The system comprises an infiltration gallery, a clean water tank and the water purification building directly arranged in a river, wherein the infiltration gallery is communicated with the clean water tank through a bottom through hole; the clean water tank is communicated with the bottom of the water purification building through a pipeline; infiltration gallery bell mouth bases are symmetrically arranged at the bottoms of both sides of the infiltration gallery and are provided with bell mouths; the bell mouths are arranged obliquely downwards from the outside to the inside of the infiltration gallery; the pipeline comprises a water inlet pipe, a backwashing pipe and a water outlet pipe; the water outlet pipe is arranged on the water purification building; a horizontal centrifugal pump is arranged at the bottom of the water purification building; the water inlet pipe is arranged on the horizontal centrifugal pump; one end of the water inlet pipe is communicated with the clean water tank, and the other end of the water inlet pipe is communicated with the water outlet pipe; the backwashing pipe is arranged on the water inlet pipe; and one end of the backwashing pipe is communicated with another clean water tank. The water intake system has the characteristics of high backwashing water flow, high water pressure, capabilities of ensuring the engineering quality and the backwashing effect, saving materials and lowering the construction cost and difficulty in blocking.

The invention relates to a foundation base of an air-film building, which includes a platform plate and a decompression steel foot. The lower part of the platform plate is buckled and connected with steel block teeth, and the lower part of the steel block teeth is provided with a rolled steel plate, and The inner side of the rolled steel plate is pasted with a rubber patch, the decompression steel foot is arranged under the rolled steel plate, and the inner side of the decompression steel foot is connected with a pin bar, and the two ends of the pin bar are provided with hexagonal For the rivet, an extended rubber pad is provided under the decompression steel foot, and a concrete layer is pasted under the expanded rubber pad, and a steel bar is installed inside the concrete layer, and a ligature wire is provided outside the steel bar. The beneficial effects of the present invention are: the base of the gas film building is equipped with an aluminum alloy plate, the adhesive glue can tightly adhere the aluminum alloy plate to form a honeycomb structure, and a supporting keel is arranged inside the aluminum alloy plate Support it, so that it can not only strengthen the strength of the equipment, but also reduce the quality.