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

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 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 relates to a household waste incineration fly ash cyclic utilization method. A flow distributing device is installed at the lower end of a dust remover of a waste incineration smoke treatment system and controls the amount of fly ash circularly entering a non-medium grinding machine, and therefore the phenomenon that since the fly ash agglomerates at a grinding medium or adheres to the inner wall of the grinding machine, the grinding effect is influenced is avoided. After the fly ash is smashed in a grinding bin, a high-pressure centrifugal fan brings the grinded powder materialsinto a powder selecting machine, fine powder meeting the fineness requirement enters a circulatory system along with airflow, and coarse particle materials incapable of meeting the fineness requirement return to the grinding bin to continue to be grinded. It is guaranteed that the particle sizes of the grinded fine powder are uniform and kept within a certain range, unreacted calcium hydroxide isfully exposed, the specific surface area of the fly ash is increased, the utilization rate of the calcium hydroxide in the fly ash can be improved to be 80% or over, and continuous industrial production can be achieved. Meanwhile, phosphate is fed into the non-medium grinding machine so as to pre-stabilize heavy metal and reduce the application amount of follow-up deacidification agents, and thephosphate also has the grinding assistance function. A strong oxidant is added and achieves the desulfurization and denitration function and the function of promoting dioxin to decompose.

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 relates to an absorption tower for wet flue gas desulfurization. A limestone-gypsum wet flue gas desulfurization process is adopted in the absorption tower. The absorption tower comprises an oxidizing reaction tank and an absorbing area, wherein a circular oxidizing reaction tank is arranged under the absorption tower; a square absorbing area is arranged above the absorption tower; a slurry spraying pipe and a nozzle connected to the slurry spraying pipe are arranged on the lower part of the absorbing area; the slurry spraying pipe is a concentric reducer pipe; the slurry spraying pipe is connected to the nozzle by a flange; a mounting angle of the nozzle which is connected to the slurry spraying pipe is vertical upwards; the oxidizing reaction tank of the absorption tower is connected to the side wall of the absorbing area in the manner of square inscribed circle or square circumscribed circle; the slurry spraying pipe and a nozzle overhauling manhole door are arranged on a steel wall of the absorption tower in the absorbing area; and a ceramic lining oxidation air pipe which is connected to the bottom of the oxidizing reaction tank is mounted by being inclined for 15-20 degrees in the manner of being high in external port and low in internal port. The absorption tower for wet flue gas desulfurization is simply and conveniently maintained, thereby efficiently lowering the maintenance cost.

An ejection drill with internal discharge of drilling chip and a single chip-discharging outlet features that its drill bit has two guide ridges, a cutting edge and a single chip-discharge outlet, and the said cutting edge has no chip breaker, so simplifying the machining technology of drill bit. Its advantages are long service life and low cost.

The invention discloses a primary wastewater treatment device. The primary wastewater treatment device comprises a treatment tank, and a movable retaining plate is connected in an inner cavity of the treatment tank and partitions the inner cavity of the treatment tank into two independent chambers including a sedimentation chamber and a filter chamber from right to left. A rotary-cut stirring mechanism is connected in the sedimentation chamber, an impurity purification mechanism is movably connected in the filter chamber, and a base plate is arranged at the bottom of the treatment tank. By the primary wastewater treatment device, triple wastewater purification treatment including rotary-cut stirring, coagulating sedimentation and impurity filtration can be realized; cutters and brushes are completely used for rotary cutting of wastewater and rotary brushing and stirring of impurities, and accordingly the wastewater and flocculating agents can be mixed thoroughly to reduce harmful substances and suspended solids in the wastewater, and primary wastewater treatment quality is greatly improved.

The invention discloses a material tank for processing of a cable sheath. The material tank comprises a base body. A protection box and a material conveying table are sequentially arranged at the top of the base body from left to right. A material stirring tank and a noise elimination box are sequentially arranged at the top of the material conveying table from left to right. The inner walls of the material stirring tank are provided with convex rods. The outer surface of a main shaft of an inner cavity of the material stirring tank is connected with a stirring assembly. According to the material tank, the material stirring effect and stirring efficiency are improved, and material particles are finer; by means of pushing force of continuous advancing of a rotary blade, materials can be further stirred and guided out fast; and the size of the material particles is reduced, meanwhile, the blockage accident can be avoided when the materials are guided out, and therefore the material tank is beneficial to improving the material stirring effect and efficiency.

The invention discloses a ceramic large rock plate broken brick automatic crushing system. The system involves a first green brick conveying belt, a second green brick conveying belt and a machine frame, wherein the first green brick conveying belt and the second green brick conveying belt are arranged in an end-to-end mode, a plurality of crushing devices which are arranged above gaps between thefirst green brick conveying belt and the second green brick conveying belt are arranged on the machine frame, a plurality of infrared induction probes are further arranged on the first green brick conveying belt, and the infrared induction probes are connected with the crushing devices. According to the crushing system, broken bricks are monitored through the infrared induction probes, the brokenbricks are knocked off and crushed along the gaps between the two sections of conveying belts through the crushing devices, the problem of cleaning after the large rock plate green bricks are brokenis effectively solved, manual cleaning of the broken brick is not needed in the whole process, the automatic level is high, so that the cleaning efficiency is effectively improved; the broken bricks are automatically cleaned in time, the bricks are effectively prevented from being hidden in the gap between the conveying belts and roller ways, the phenomena of blocking accidents of a roller way kiln caused by the fact that the broken bricks enter the high-temperature sintering roller way kiln are prevented, the production efficiency is improved, and loss of green bricks is reduced.

The invention discloses a movable hopper of compound fertilizer production equipment. The movable hopper comprises a hopper main frame, a vibrator and a moving unit, wherein a hopper container is arranged at the top end of the hopper main frame; the hopper container is fixedly connected with the hopper main frame; a material outlet is formed in the middle part of the hopper main frame; the material outlet is connected with the hopper main frame in an embedded manner; a material discharging guide plate is arranged at a hollow part of the material outlet; the material discharging guide plate isconnected with the material outlet in a penetrating manner; a base is arranged at the bottom end of the hopper main frame; and during transferring of prepared compound fertilizer materials, a container with the compound fertilizer materials is required to lean against a position at the top end of the hopper in each process of pouring the materials into the hopper, and after a lot of transferring work, the top end, particularly the top end of the hopper, and the container with the compound fertilizer materials are greatly worn, but an anti-wear border with wear resistance property can prevent multiple problems such as the influence on the appearance due to severe wear of the hopper, so that the movable hopper has a wide use prospect in the future.

The invention discloses a multi-purpose liquid dressing device capable of preventing overflow and leakage, which comprises a base, a placement groove, a control panel, heating plates, a filtering and filling mechanism, overflow and leakage preventing mechanisms and a fixing seat, wherein supporting columns are arranged on the two sides of the base, a top plate is fixedly connected to the top ends of the supporting columns, the placement groove is formed in the top plate, a stirring barrel is arranged above the placement groove, the control panel is arranged on the outer side of the stirring barrel, the heating plates are arranged on the two sides of the interior of the stirring barrel, the filtering and filling mechanism is arranged below the discharging pipeline, the overflow and leakage preventing mechanisms are arranged on the two sides of the top end of a liquid dressing bottle, a precipitation preventing mechanism is arranged in the liquid dressing bottle, and a fixing base is arranged at the bottom of the liquid dressing bottle. According to the multi-purpose liquid dressing device capable of preventing overflow and leakage, the stirring mechanism and the filtering and filling mechanism are arranged, liquid dressing raw materials can be evenly stirred through the stirring mechanism, impurities in liquid dressings can be conveniently filtered through the filtering and filling mechanism, and the situation that a filling head is blocked during filling is avoided.

The invention relates to the technical field of fused alumina zirconia mullite bricks, and discloses a fused alumina zirconia mullite brick for a hazardous waste rotary kiln and a preparation method thereof.The preparation method comprises the steps that aluminum oxide, alkali powder, zircon sand and other raw materials are added into an electric furnace, the raw materials are subjected to high-temperature oxidation melting, oxygen is blown into melt, then the melt is directly poured into a casting mold from the electric furnace, and after casting of a casting is completed, the fused alumina zirconia mullite brick is obtained; after cold contraction for a period of time, the melt is fully cast in a shrinkage cavity, and the casting mold is cooled in advance before casting, so that the temperature difference between the casting and the casting mold is increased, the width of a solidification area of the casting from the surface to the inside is reduced, the solidification shrinkage speed of the casting is slowed down, and the possibility of hot cracking when the core part of the casting is finally solidified is reduced; meanwhile, in the casting process, the outside of the casting mold is cooled, so that the situation that the temperature of the casting mold rises, material components of the casting mold are decomposed and gasified and chemically react with molten liquid is avoided, and the possibility that a pore layer appears on a casting or insufficient casting occurs is reduced.

The invention relates to a foundation base of an air film building. The foundation base comprises a platform plate and pressure reduction steel feet, wherein steel block clamping teeth are connected to the lower portion of the platform plate in a buckled mode, a rolled steel plate is arranged below the steel block clamping teeth, and a rubber patch is attached to the inner side of the rolled steel plate; the pressure reduction steel feet are arranged below the rolled steel plate, pin bars are connected to the inner sides of the pressure reduction steel feet in a penetrating mode, and hexagonal rivets are arranged at the two ends of each pin bar; and expansion rubber mats are arranged below the pressure reduction steel feet, a concrete layer is attached to the lower portions of the expansion rubber mats, reinforcing steel bars are mounted in the concrete layer, and binding wires are arranged on the outer sides of the reinforcing steel bars. The foundation base of the air film building has the beneficial effects that aluminum alloy plates are mounted on the foundation base of the air film building and can be closely bonded together through adhesive glue to form a honeycomb structure, supporting keels are arranged in the aluminum alloy plates for supporting, thus the strength of equipment can be enhanced, and the effect of mass reduction can be achieved.

A horizontal sand prevention vicious pump comprises a pump cylinder assembly, a fixing valve assembly and a plunger piston assembly. The plunger piston assembly is inserted into the pump cylinder assembly and the fixing valve assembly. The pump cylinder assembly comprises a pump cylinder coupling, an upper pump cylinder, a gap bridge outer tube and a guide sleeve. The fixing valve assembly comprises a fixing valve and a lower pump cylinder. The plunger piston assembly comprises a pull rod coupling, a pull rod, an upper plunger piston, a travelling valve, a pull rod joint and a lower plunger piston. A strike-off cup with an inward small end is arranged at the upper end of the upper plunger piston, the upper end of the pull rod is connected with an oil pumping rod pillar through the pull rod coupling, and the lower end of the pull rod is in series connection with the lower plunger piston into a whole through the pull rod joint. The upper plunger piston is sleeved outside the pull rod, and can move vertically along the pull rod. The horizontal sand prevention vicious pump can effectively reduce accidents of pump clamping, pulling and plugging caused by sand production of an oil well, removes eccentric wear between the pump cylinders and the plunger pistons, and has mechanical forced on and off function.

The invention discloses an anti-blocking structure and method for a vertical mill feeding system, and relates to the field of cement raw material grinding, the anti-blocking structure comprises a vertical mill system, the vertical mill system comprises a small bin box body, a chain plate scale and a mill feeding scraper-trough conveyer, and the anti-blocking structure further comprises an air heating main pipeline, and an air outlet of the air heating main pipeline is connected with a hot air induced pipe; a three-way valve is arranged at one end of the hot air inducing pipe, an air outlet of the three-way valve is respectively connected with a first air inducing pipe and a second air inducing pipe, the first air inducing pipe is communicated with the bottom of the small bin box body, and the second air inducing pipe is communicated with a chain plate scale; the air outlet pipe is arranged on the back face of the small bin box body, the end, penetrating out of the small bin box body, of the air outlet pipe is connected with the mill inlet scraper-trough conveyer, the pressure at the mill inlet pipeline and the pressure difference at the mill inlet scraper-trough conveyer in the mill are utilized, the small sealed bin is of a box body type through structure, and circulating hot air is formed. And the circulating hot air dries the materials entering the warehouse, the scale body and the grinding scraper-trough conveyer.