56results about How to "Strong anti-blocking" patented technology

The invention discloses a method for preparing polymethoxy dimethyl ether through reaction and rectification of a fixed bed. The method comprises the following steps: (1) preheating trioxymethylene, uniformly mixing the preheated trioxymethylene and methylal, and feeding the trioxymethylene and the methylal which are uniformly mixed into a fixed bed reactor for an etherification reaction; (2) feeding materials after the etherification reaction into a reaction rectifying tower for the reaction and the rectification, and discharging PODE2-8 from the tower bottom of the reaction rectifying tower; (3) transporting the PODE2-8 to a dewatering tower loaded with a 3A molecular sieve for dehydration, then transporting the dehydrated PODE2-8 into a first refining tower, transporting materials which are discharged from the tower bottom of the first refining tower into a second refining tower, discharging PODE3-5 from the tower top of the second refining tower, and discharging PODE6-8 from the tower bottom of the second refining tower. When the method disclosed by the invention is used for preparing the PODE3-8, the yield of the polymethoxy dimethyl ether can reach 95%, wherein the products of the PODE3-8 can reach 80%-95%, and after refinement, the PODE3-5 of which the quality purity reaches 99.9% can be obtained.

The invention relates to a method for rectifying trichlorosilane, and belongs to the technical field of trichlorosilane rectification and purification. The method comprises the following steps of: feeding trichlorosilane-containing crude synthesis liquid into a preparation tower and rectifying to separate and remove most light impurity components from a raw material; discharging the liquid subjected to impurity removal by the preparation tower from a tower bottom, and feeding into a trichlorosilane rectifying tower to obtain a trichlorosilane product at a tower top; and feeding the material in a tower kettle into a silicon tetrachloride rectifying tower, and evaporating a silicon tetrachloride product on the top of the silicon tetrachloride rectifying tower. By the method, energy can be saved by 60 percent, and an energy-saving effect is obvious; and by a continuous rectification technology, yield is greatly improved while the energy is saved.

The invention discloses a flow-separation back-mixing-free spraying tower disc. The tower disc is formed by combining an upper-layer tower disc and a lower-layer tower disc; and each tower disc comprises liquid descending grooves, liquid descending pipes, liquid accepting grooves, three-dimensional spraying and mass transferring units and liquid guide grooves. The flow-separation back-mixing-free spraying tower disc is characterized in that the long-strip-shaped liquid accepting grooves are formed in the horizontal position of the center of the tower disc; each long-strip-shaped liquid descending groove is arranged between each two adjacent liquid accepting grooves; liquid descending openings are designed in the bottoms of the liquid descending grooves; each liquid descending opening corresponds to one liquid descending pipe, and each liquid descending pipe stretches and is fixed in each liquid descending groove; the three-dimensional spraying and mass transferring units are arranged among the liquid descending grooves and the liquid accepting grooves; the liquid guide grooves, which are flow-separation-plate-type liquid guide grooves, are arranged on the peripheries of cap covers of the three-dimensional spraying and mass transferring units; one liquid guide groove corresponds to one three-dimensional spraying and mass transferring unit; the shapes and the structures of the upper and lower tower discs are the same basically; and one set of liquid descending pipes on the lower edge of one liquid descending groove of the upper-layer tower disc correspond to one liquid accepting groove of the lower-layer tower disc in a staggered manner, so that the upper-layer tower disc and the lower-layer tower disc are combined into the double-layer flow-separation back-mixing-free spraying tower disc.

The present invention discloses a filtering mesh for an oil well, a sand control sleeve and a sand control screen pipe using the filtering mesh. The filtering mesh at least comprises a bottom diffusion mesh (20) and one or more twill weave meshes (21) fixed on the bottom diffusion mesh (20); one or more twill weave meshes (21) are applied in filtrating solid particulates in a stratum fluid, and the bottom diffusion mesh (20) is applied in diffusing the filtrated fluid. The bottom diffusion mesh (20) is a woven mesh or a punching steel plate mesh with 5-50 meshes; the aperture of the twill weave mesh (21) is 40-400 micron. The present invention also relates to a sand control sleeve formed of the filtering mesh, a tubular inner protective shroud (19) and a supporting ring (15). This invention further relates to a sand control screen pipe formed of the filtering mesh, a multi-holes base pipe (1), a tubular inner protective shroud (19), an outer protective shroud (3) and a supporting ring (15).

The invention relates to a method of making low temperature polycrystalline silicon thin film transistor (LTPS TFT), firstly forming a polycrystalline silicon layer containing a channel region, successively making first and second plasma enhancement chemical gas phase deposition procedures so as to in sequence form a silicon oxide layer with tetraethyl silicon hydroxide as the principal and a compound grid insulating layer composed of a silicon nitride layer, and finally forming a grid electrode and source/drain of the LTPS TFT.

The invention provides a sieve plate device preventing hole blocking in a screening blind area. The sieve plate device comprises a compressed air system and a sieve body which are arranged sequentially from top to bottom. The sieve body comprises a sieve net provided with a plurality of sieve holes. The compressed air system comprises a flat air bag matched with the sieve net in shape. A pluralityof acicular air pipes corresponding to the sieve holes are arranged at the bottom of the air bag. Each acicular air pipe comprises an upper pipe end communicating with the air bag, and a lower pipe end communicating with the outside air, wherein the pipe hole of the upper pipe end is of a straight cylinder structure, and the pipe hole of the lower pipe end is of a wide-end-up conical structure. Aplurality of compressed air inlet pipes are arranged at the top of the air bag and are connected with outside compressed air pipelines. The compressed air system with the acicular air pipes is arranged above a sieve plate, the acicular air pipes blow air to the sieve holes of the sieve net to blow off viscous matter blocking the sieve holes, blocking prevention efficiency is high, and cost for cleaning the sieve net can be lowered effectively.

The invention belongs to the technical field of agricultural machinery, and in particular relates to an active driving lever type anti-blocking mechanism. The active driving lever type anti-blocking mechanism comprises a rack, furrowing blades, a power transferring device and an anti-lockage device, wherein the furrowing blades are symmetrically fixedly connected on the rack; the power transferring device is arranged on the rack between the two adjacent furrowing blades; the power output by a tractor is transferred to the anti-blockage device arranged between the adjacent furrowing blades; the anti-blockage device comprises a three-connecting-rod moving mechanism which is formed by an anti-blockage device swinging arm, a connecting section of an anti-blockage device driving lever and an anti-blockage device rotating arm; the anti-blockage device driving lever is driven by a driving shaft of the anti-blockage device to reciprocate front and back or up and down so that straws between the adjacent furrowing blades is lifted to the part in back of the furrowing blades so as to achieve the active anti-blockage function. The active driving lever type anti-blocking mechanism disclosed by the invention has a simple structure; and the front end of the straw lifting section of the driving lever is not inserted into soil when the anti-blockage device driving lever reciprocates, therefore, the active driving lever type anti-blocking mechanism has the advantages of having low power consumption and high anti-blockage capacity, being capable of realizing no-tillage seeding in a condition of high straw coverage, being applicable to no-tillage corn seeding machines, and being beneficial to promoting the popularization of conservation tillage.

The invention discloses a method for preparing a polyurethane curing agent. The method comprises the following steps of: firstly, evaporating a curing agent obtained by polymerizing an isocyanate monomer through an external cold type film evaporator to remove part of free isocyanate monomer; and secondly, separating heavy components separated by the external cold type film evaporator through a high-speed rotary bed to obtain a product with lower free monomer content, wherein the content of the free isocyanate monomer is 0.05-0.6 percent by weight. The method disclosed by the invention has theadvantages of small size of equipment, high separation speed, high quality of products, high recovery rate of the monomer, capability of meeting the requirements of environmental friendliness, relatively low requirement on filed and little investment. According to the method, the content of the free isocyanate monomer in the polyurethane curing agent is reduced without remarkably increasing the relative molecular weight and molecular weight distribution of polyisocyanates and the downstream application is facilitated.

The invention relates to a high-flow anti-blocking Y-shaped drainage guide pipe. The guide pipe is in a shape similar to Y shape, and comprises two groove pipe sections, a sealed pipe section and a tee, wherein the tee is connected with the groove pipe sections and the sealed pipe section. The guide pipe is characterized in that the interior of each groove pipe section is provided with support bodies which are arranged in a radial form, each groove pipe section is divided into N drainage passages by the support bodies, the cross section of each drainage passage is a fan area, the outer wall of each groove pipe section is provided with N strip groove ports used as drainage ports corresponding to the fan areas, the interior of the sealed pipe section is provided with N ribs, the axial center of each rib is convex, and N is greater than or equal to 3. The high-flow anti-blocking Y-shaped drainage guide pipe has the advantages that the flow quantity is high; the sealed pipe section is provided with the ribs, and after the sealed pipe section is bent, the flow through capability is also realized, and the anti-blocking performance is high; the strip groove ports are used as the drainage ports, so the flow through capability is high, and especially for helical strip groove ports, the flow through capability is higher; by additionally arranging a center pipe, a flushing hole and a flushing liquid supply pipe, the flushing capability is realized, and the groove pipe can be applied to the occasions requiring flushing and drainage.

The invention relates to grid packing and a packing structure. The grid packing comprises a plurality of grid plates which are arranged in parallel; each grid plate is provided with more than two through holes; a pipe spacer is arranged between every two grid plates; pull rods in a number corresponding to the number of the through holes alternately penetrate through the grid plates and the pipe spacers; both ends of each pull rod are provided with fastening pieces so that the grid plates and the pipe spacers are connected into a whole; each pull rod is a screw with threads at both ends; and each fastening piece is a nut which is in threaded connection with the screw. The packing structure applied to a packing tower comprises a plurality of layers of grid packing which is arranged vertically; the grid plates of the grid packing are perpendicular to the cross section of the packing tower, and two vertical adjacent layers of the grid packing are staggered and arranged at 45 degrees. The grid plates of the grid packing have small thickness, smooth surfaces, stable integrity, large specific surface area in use, strong anti-clogging capability, little resistance and long service life, thereby being practical, high-efficiency and energy-saving packing.

The application provides a rock and gas multi-process coupling test device for unconventional natural gas, the device is characterized by comprising a first clamping mechanism, a second clamping mechanism and a differential pressure sensor, wherein pipelines at both ends of the first clamping mechanism and the second clamping mechanism are provided with first electromagnetic valves; pipelines at both ends of the differential pressure sensor are provided with manual valves; the differential pressure sensor 3 is connected in parallel with a second electromagnetic valve. The aim of designing anddeveloping the device is that the system can carry out a true triaxial experiment on shale carbonaceous, the system finds out a relationship of permeability of a coalbed methane reservoir in the developing process and an effective stress element and can reasonably determine a development mode of coalbed methane.

The invention relates to an injection nozzle for sprinkling irrigation and fertilization of a circular sprinkling irrigation machine, which is characterized by comprising a strip-shaped nozzle body; a contraction type flow passage which is gradually narrowed down is formed inside the nozzle body; one wider end of the flow passage of the nozzle body is connected with a nozzle cap, the other end of the nozzle body is inserted into a water inlet pipe of the circular sprinkling irrigation machine, and a nozzle head is integrally arranged at the end part of the nozzle body; a nozzle flow passage communicated with the contraction type flow passage is formed inside the nozzle head, and the other end of the nozzle head is connected with a blockage; a blocking plug and a spring are arranged in the nozzle head flow passage; a plurality of nozzle outlets are formed in the circumferential direction of the nozzle head; one end of the nozzle cap is connected with the nozzle body, and an exhaust device is arranged at the other end of the nozzle cap; and an inside flow passage is formed in the nozzle cap and is communicated with the contraction type flow passage in the nozzle body, a fertilizer inlet pipeline is vertically arranged on the outer wall of the nozzle cap, one end of the fertilizer inlet pipeline is communicated with the inside flow passage of the nozzle cap, and the other end of the fertilizer inlet pipeline is connected with a water outlet pipeline of a fertilizer liquid pressing device. The injection nozzle has good mechanical performance and hydraulic performance, has the function of preventing the backflow of water and is suitable for the sprinkling irrigation and the fertilization of the circular sprinkling irrigation machine.

The invention discloses a mist catching separation device, which comprises a pressing grid and a support frame. The pressing grid and the support frame are sequentially fixed in a tower body or a container from top to bottom; a mist catching wire mesh is arranged between the pressing grid and the support frame; the mist catching wire mesh and a plate coalescent pack are laminated between the pressing grid and the support frame; and the plate coalescent pack is positioned under the mist catching wire mesh. The mist catching separation device adopts a structure that the mist catching wire mesh is combined with the plate coalescent pack to form a liquid-mist separation component, the plate coalescent pack has strong anti-blocking so as to realize initial mist separation, and the mist subjected to the initial separation is subjected to secondary separation of the mist catching wire mesh to achieve better separation effect; therefore, the use range of the mist catching separation device is broadened, equipment corrosion is excellently reduced, service life is prolonged, treatment capacity is improved, valuable materials are recycled, environment is protected, atmospheric pollution is lightened and the like.

The invention provides a cutting assembly for a stainless steel cutting submersible pump, belonging to the technical field of water pumps and solving the problems of low cutting performance and poor blockage resistance existing in the traditional cutting assembly of the stainless steel cutting submersible pump. The cutting assembly of the stainless steel cutting submersible pump comprises a static cutting pair with a circular through hole and a dynamic cutting pair coaxially penetrating in the through hole; a medium channel by which a medium goes from one port of the through hole of the static cutting pair to the other port is arranged between the outside part of the dynamic cutting pair and the inner edge of the static cutting pair; the outside part of the dynamic cutting pair is provided with a dynamic cutting edge part; and the inner edge part of the static cutting pair is provided with a static cutting edge part opposite to the dynamic cutting edge part and used for forming the cutting pairs. The cutting assembly for the stainless steel cutting submersible pump only comprises the static cutting pair and the dynamic cutting pair and has the advantages of simple structure and reasonable design and layout.

The invention relates to an active no-tillage planter, and belongs to the field of agricultural machines. The active no-tillage planter comprises a rack assembly, an anti-blocking furrowing assembly, a fertilizing and sowing assembly, an earthing and pressing assembly and a transmission assembly, wherein the anti-blocking furrowing assembly, the fertilizing and sowing assembly, the earthing and pressing assembly and the transmission assembly are fixedly installed on the rack assembly. The anti-blocking furrowing assembly comprises a driving chain wheel, a driving shaft, an L-type furrowing cutter I, an L-type furrowing cutter II and a disc stubble cutting cutter, wherein the driving chain wheel is installed at one end of the driving shaft, the disc stubble cutting cutter is installed on the driving shaft, and the L-type furrowing cutter I and the L-type furrowing cutter II are arranged at the two sides of the disc stubble cutting cutter respectively. No-tillage sowing operation in the hilly and mountain area can be achieved, the processes of anti-blocking furrowing, fertilizing, sowing and pressing are completed at a time, human labor is relieved, the sowing requirement is met, and operation efficiency is improved; the active anti-blocking technology is achieved, the anti-blocking performance is high, soil disturbance is small, and power consumption is low. The active no-tillage planter is simple in structure and convenient to adjust.

The invention relates to a multistage combined type high-efficiency heat-exchanging dust-removing device, a dedusting tower comprises, from bottom to top in turn, a tower bottom gas distributor, an initial washing section tower tray, an initial washing section washing liquid distribution tube, a secondary flushing section grid filler, a secondary flushing section anti clogging liquid distributor, a secondary flushing section feeding distribution tube, a fresh washing liquid feeding distribution tube and a swirl plate demister. A dedusting tower circulating liquid is divided into two parts to enter the tower, one part is pumped onto the upper part of a herringbone baffle plate by a pump, and the other part is pumped onto the upper part of the grid filler by the pump. Through use of the multistage combined type high-efficiency heat-exchanging dust-removing device for treatment of a dust-containing gas, the amount of the fresh washing liquid can effectively be reduced, energy and material consumption are saved, by use of the multistage combined type high-efficiency heat-exchanging dust-removing device for treatment of the dust-containing gas, the washing liquid as a tower bottom liquid phase can be recycled, the liquid is basically sealed and recycled, and the washing heat-exchanging can be effectively improved. The multistage combined type high-efficiency heat-exchanging dust-removing device is every low in pressure drop, the whole tower pressure drop is less than 3kPa, and the anti blocking performance is strong.

The invention provides a matching planting method for multi-span greenhouse mechanical production. The method comprises the steps of chili seed preparation, seedling growing substrate preparation, chili seedling preparation, fertilizer applying for soil, deep scarificationploughing and rotary tillage, after the deep scarification ploughing and the rotary tillage, and soil is divided into a basic layer with large and compact particles and a soft growing layer; a ridger is used for ridging along the trend of a greenhouse; a multi-functional mulch applicator is adopted for completing the work ofdrip irrigation zone laying and mulching film laying; a full-automatic or semi-automatictransplanter is adopted for conducting transplanting and planting on chili seedlings with the seedling age of 45-50 days, the plant height of 15-18 cm and 6-8 main leaves, the chili seedlings are transplanted and planted in a growth layer, and seminal leaves are flush with the ground. According to the method,through mechanical planting for chili, it can be avoided that the soil is hardened or compacted manually, the root systems of the chili can effectively breath normally, the chili can conveniently absorb nutrition, and the problems that the labor intensity of manual planting for the chili is high, the amount of the labor used is large, and the production cost is gradually increased are solved.

The invention discloses a three-cutter stubble cutting and straw cutting anti-blocking operation monomer of a no-tillage planter and belongs to agricultural machinery. Left and right straw-breaking driving cutters are fixedly arranged on a power drive shaft oppositely; a stubble-cutting driven cutter rotationally sleeves outside the part between the left and right straw-breaking driving cutters on the power driver shaft; the outer diameter of the stubble-cutting driven cutter is greater than those of the left and right straw-breaking driving cutters; straw-breaking blades of the left and right straw-breaking driving cutters and a stubble-cutting blade of the stubble-cutting driven cutter all are Archimedean spiral lines. The monomer is capable of breaking underground stubbles and cutting off over-ground straws, and has the characteristics of being novel, reasonable and simple in structure, good in stubble-cutting and straw-breaking operation quality, small in ground-breaking amount, high in anti-blocking function, low in power consumption and reliable in use.