60results about How to "Solve the problem of pipe blockage" patented technology

The invention discloses a zero-drainage technology for recycling crystallizing salt from high-salinity wastewater and a treatment system thereof. The treatment system comprises a tubular microfiltration system, a weak acid resin hardness removal system, a nanofiltration membrane salt separating system, a nanofiltration concentrated water oxidizing system, a nanofiltration concentrated water sodiumsulfate evaporating and crystallizing system, a sodium sulfate freezing and crystallizing system and the like. The zero-drainage technology has the advantages that the pretreated wastewater is subject to nanofiltration primary salt separating, the salt component in the produced water is mainly sodium chloride, the sodium chloride with purity no lower than 98.5% is obtained by membrane concentration, evaporating and crystallizing, and the sodium sulfate with purity 99.1% or more is produced by MVR (mechanical vapor recompression) crystallizing after concentrated water oxidizing; a mother liquid after evaporating and crystallizing of sodium sulfate and a mother liquid after nanofiltration evaporating and crystallizing are mixed and frozen, so as to obtain mirabilite, and the mirabilite is converted into anhydrous sodium sulfate after sodium sulfate evaporating and crystallizing; at the premises of ensuring quality, the whole recycling rate of salt reaches 90% or above; finally, a smallamount of mother liquid is sprayed, dried and cured, and the zero-drainage effect of wastewater is realized.

A mixed mix of a lightweight inner wall was mixed with the following weight ratio: 30-35 of ordinary silicate cement; 4-5 cooked lime; 5-10 light materials; 5--fineness is 5--The 25th purpose is 50-60 waste sand for heavy materials; 1.0 antibacterial and mold-proof composite agent provided by Guangzhou Synthetic Trade Company, 0.4 kg of antibacterial mold and mold per kilogram, 0.1 kg of water retention, 0.3 kg of diversified latex powder and diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and diversified latex powder and 0.3 kg of diversified latex powder and divergent latex powder and 0.3 kg of divergent latex powder.The composition of the air induction agent is mixed with 0.2 kg; the light collection is the fine -grade -based inorganic vival and short -hole material below 100 destinations.The diluted weight ratio during construction is the inner wall plastering mortar: water = 100: 30-50.The mortar uses waste sand in the construction waste as the mortar. It uses materials to recycled, and the crack resistance is good.The adhesion intensity meets the requirements. It can be used with lightweight walls to prevent air drums, cracking, falling off, and ensuring the quality of the project; low unit area cost; can reduce mold and bacterial breeding.

An organic solid waste water regulation high-temperature aerobic composting device and a method thereof relate to an organic solid waste composting device and a method thereof. The invention settles the problem of affecting the quality of the composting product, which is caused by the vertical maldistribution of the moisture content of the composted object in the warehouse type forced ventilation composting process. The prior mode for adjusting the moisture content has the defects of complicated device and high cost. The conical warehouse top of the device according to the invention is installed on the upper end face of the fermentation warehouse. An annular water collecting groove is provided in the fermentation warehouse. A plurality of water distributors are provided in the fermentation warehouse. The upper end of the water inlet pipe is communicated with the annular water collecting groove, and the lower end of the water outlet pipe is communicated with a water distributing pipe. The method of the invention comprises the following steps: mixing the organic solid waste with the fermentation conditioner, executing intermittent ventilation, executing water distribution for the composted object through the water distributors in the fermentation process, in the 12-th to 15-th day of fermentation, reducing the temperature of the composted object to less than 40 DEG C, and completing the fermentation process of the composted object. The organic solid waste water regulation high-temperature aerobic composting device and the method according to the invention have the advantages of: uniform water content of composted object, high quality of the composted product and low cost.

The invention discloses low-viscosity, anti-cracking and high-strength wet-spraying concrete and a preparation method thereof. The wet-spraying concrete comprises the following components: 470-485kg / m<3> of a cementing material, 165-175kg / m<3> of water, 5-11kg / m<3> of a viscosity regulating component, 38.5-40.5kg / m<3> of an anti-cracking component, 8.0-8.5kg / m<3> of a water reducing component, 900-950kg / m<3> of fine aggregate, 750-780kg / m<3> of coarse aggregate and 40-42kg / m<3> of an alkali-free liquid accelerator. The wet-spraying concrete has 28d compressive strength of 65MPa or above; undera slump condition of 200mm plus or minus 10mm, the emptying time of an inverted slump cone is shorter than 15s; in an early anti-cracking test, the total cracking area per unit area is not greater than 250mm<2> / m<2>, and the cracking grade is L-IV; in a ring cracking test, no cracking occurs within 56d, and the cracking tendency is low. The wet-spraying concrete is high in strength, low in viscosity, good in anti-cracking performance and easy to pump and construct through spraying, and facilitates improvement on the bearing capacity and the water-proof performance of a sprayed concrete liningstructure.

The invention relates to the technical field of construction of segment girders, and discloses a construction method of a segment girder prestressed pipeline. The construction method comprises the following steps of firstly, casting a matching segment; mounting a plastic pipe (3) and a rubber ring (4) between the matching segment and a second corrugated pipeline (21) for positioning, wherein a second plug (23) and a second notch mold (24) are fixed at the other end of the second corrugated pipeline (21); then putting an air expanding shaft air sac (5) in a first corrugated pipeline (13), putting the air expanding shaft air sac (5) on the inner side of the first corrugated pipeline (13) and on the inner side of the second corrugated pipeline (21), and then performing inflation, so that the side wall of the air expanding shaft air bag (5) is in contact with the inside wall of the first corrugated pipeline (13) and the inside wall of second corrugated pipeline (21); and performing casting after completing mounting. According to the construction method disclosed by the invention, after being inflated, the air expanding shaft air bag stuffed between the inner side of the first corrugated pipeline and the inner side of the second corrugated pipeline, is used for supporting the first corrugated pipeline and the second corrugated pipeline in the corrugated pipelines, and the corrugated pipes are prevented from being deformed and misplaced pressed by external force.

The invention discloses an anti-blocking self-vibrating ring for a sprayed concrete pumping pipe. A groove is formed in the vibrating ring; a vibrator is mounted on the inner part of the vibrating ring; a pressure slot is arranged on the inner wall of the vibrating ring; a magnetic suspension electromagnet is mounted at the periphery of the groove; a fan-shaped frame is arranged on a ring-shaped bracket; a bulge is arranged on the fan-shaped frame; the magnetic suspension electromagnet is mounted at the periphery of the bulge; the bulge is embedded into the groove; and a pressure detecting device is mounted in the pressure slot. The anti-blocking self-vibrating ring has the function of automatically switching on and switching off, can complete switching among three working states of vibrating, strengthened vibrating, and stopping vibrating according to the blocking pressure of the pipe wall of the sprayed concrete pumping pipe, and also can automatically strength the vibrating frequency and the vibrating amplitude of the vibrating ring along with the increase of pressure, so that the pipe blocking problem of the sprayed concrete pumping pipe is solved, an interior electromagnet system can enable the vibrating ring to realize magnetic suspension in a pipe diameter direction and a pipeline direction, the impact effect of the vibrating ring to the pipeline outer pipe is greatly relieved, and the energy can be utilized to vibrate the sprayed concrete pumping pump to the greatest extent.

The invention discloses a large-section U-shaped earth pressure balance shield tunnel construction method based on a U-shaped shield tunneling machine. The large-section U-shaped earth pressure balance shield tunnel construction method comprises the following steps that 1, an opencut tunnel counter-force structure shield launching device is arranged, and the end is reinforced through a large pipeshed in the tunnel entering direction; 2, a launching base is arranged on a bottom plate structure, three first guide rails are arranged on the launching base to serve as a shield tunneling machine guiding rail, three second guide rails are laid in a tunnel portal pilot tunnel, the first guide rails and the second guide rails are connected and located at the connecting position of the shield tailof the shield tunneling machine and a medium shield, and a shield tail welding groove is formed in the launching base; and 3, an opencut tunnel reinforcing section structure is arranged to provide counterforce for the shield tunneling machine. On the basis of the U-shaped shield tunneling machine, a complete set of technologies, including the opencut tunnel counter-force structure shield launchingtechnology, the shield tunneling parameter control technology, the large-section U-shaped shield segment splicing technology and the muck improvement technology, of large-section U-shaped shield construction is formed.

The invention relates to a manual grouting layer method pile toe three-dimensional post-pressure grouting structure, which comprises a reinforcement cage and a grouting guide pipe; the grouting guide pipe is bound to the inner side of the reinforcement cage in a parallel manner; the reinforcement cage is positioned in a pile hole of a grouting pile; the manual grouting layer method pile toe three-dimensional post-pressure grouting structure also comprises an annular grouting pipe; the annular grouting pipe is bound to the inner side of the lower part of the reinforcement cage; the elevation of the annular grouting pipe is 20-30 cm higher than the bottom elevation of the reinforcement cage; the annular grouting pipe is communicated with the grouting guide pipe; the bottom of the pile hole of the grouting pile is provided with a rubble layer with the height being 30-50 cm. When the reinforcement cage is lifted and released, collision between the reinforcement cage and things such as the construction site, soil bodies on the side wall of the pile hole and gravel-cobble at the bottom of the pile hole can be effectively avoided, so that the annular grouting pipe is protected from damage; the annular grouting pipe is wrapped in the rubble layer before grouting, and is not in contact with pile concrete, so that the problem that the annular grouting pipe is plugged due to the fact that the pile concrete wraps the annular grouting pipe is effectively solved, and the goals of curing sediment and improving the bearing capability of a pile toe are achieved through performing solidification and cementation under the effect of high-pressure cement paste.

The invention provides a flue gas desulfurization and dust removal method and device. The device comprises a desulfurization tower (1), wherein the internal space of the desulfurization tower (1) is divided into an upper bin (2), a middle bin (3) and a lower bin (4) which are closed relative to one another from top to bottom through a first partition board (5) and a second partition board (6), a flue gas discharge outlet (21) is formed in the top of the upper bin (2), and a demisting device (22) is arranged in the upper bin from top to bottom; the middle bin (3) is provided with a flue gas inlet (31) used for leading flue gas to be processed into the desulfurization tower, at least one flue gas channel (32) is arranged in the middle bin (3) to be used for communicating the upper bin (2) with the lower bin (4), and a sprinkling device (33) is arranged on the top in the middle bin (3); a liquid storage container (41) used for storing flue gas desulfurization agent solution is arranged on the bottom of the lower bin (4), and the second partition board (6) between the middle bin (3) and the lower bin (4) is provided with at least one scattering pipe (42), and the scattering pipes (42) are communicated with the middle bin (3) and the lower bin (4).

The invention discloses an anti-blocking tube heating device for sponge production. The heating device consists of a temperature measuring tube, a sleeve, a heat insulation layer, a sleeve flange, an inverse U-shaped connecting tube, an inverse U-shaped connecting tube flange, a U-shaped resistance wire, two heat radiation sleeves, a contact rod sleeve and a contact rod, wherein one end of the heat radiation sleeve is closed and provided with a pore communicated with the inverse U-shaped connecting tube at the position close to the inverse U-shaped connecting tube flange; the U-shaped resistance wire is arranged inside the heat radiation sleeve, the heat insulation layer is formed in the sleeve, and the sleeve is sealed through the sleeve flange and the inverse U-shaped connecting tube flange; and a U-shaped resistance wire binding post is connected with the contact rod, and the contact rod is sealed in the contact rod sleeve. The heating device effectively solves the problem that a passageway standpipe at the distillation stage of the titanium sponge production is blocked, shortens the distillation time, reduces the times of opening a condenser for examination, reduces the probability of air inlet pollution of a titanium sponge product, saves energy, reduces consumption, and prolongs the service life of the product by about 2 to 3 times.

The invention discloses a temporary centralized diversion and drainage device for water gushing from a lithologic stratum tunnel and a use method of the device. The device comprises an outer shell structure for forming holes in surrounding rock and supporting the wall of the holes. The front end surface of the outer shell is uniformly provided with holes which realizes division of seepage water ofhole walls into an inner drainage space. The device also includes a drainage guide structure for collecting and discharging seepage water, wherein one side of the outer wall of the drainage guide structure fits closely to the inner wall of the outer shell while the other side is communicated with the outer space. The invention solves the problem that temporary drainage is required on the face ofthe rock stratum tunnel during excavation, ensures construction safety, shortens the construction period of the tunnel and reduces the engineering cost.

The invention provides a gate type concrete pump and a pumping control system thereof. The pumping control system for the gate type concrete pump comprises a gate control system (10), a master oil cylinder control system (20) and a position switch (13), wherein the gate control system (10) comprises a gate and a gate control oil cylinder which is in drive connection with the gate; and the position switch (13) is arranged in an extending direction of the gate control oil cylinder and is used for detecting position of the gate during closure and outputting a signal to the master oil cylinder control system (20). According to the pumping control system for the gate type concrete pump, the conditions that pumping is started after a gate valve is closed in place and is tightly closed can be guaranteed, and the phenomenon that slurry flows back to a hopper due to concrete separation is prevented; therefore, pipe blockage is prevented.

The invention discloses a viscosity adjusting admixture for spray construction and a preparation method thereof. The viscosity adjusting admixture is composed of following components in parts by weight: 60 to 90 parts of ultrafine powder, 5 to 10 parts of a rheology modifier, 5 to 10 parts of an aggregate wrapping agent; 0.5 to 1 part of an air entraining agent; 1 to 10 parts of a reinforcing component; and 1 to 10 parts of a setting control component; wherein the ultrafine powder is ultrafine limestone flour with a size of 600 to 1000 meshes, and the aggregate wrapping agent is a nano aggregate wrapping agent. The provided viscosity adjusting admixture can reduce the rebound rate, improves the construction efficiency, enhances the strength of all stages, and obviously improves the qualityof construction engineering that uses motor spraying and concrete spraying. The admixture can be used to adjust the viscosity of a spraying material. The pipe obstruction is inhibited. The construction efficiency is improved. The rebound rate of spraying construction, the strength of materials of all stages, and the bonding strength are all improved.

The invention provides a blockage removing pipeline and a blockage removing method for double-sleeve long-distance pneumatic material conveying. The blockage removing pipeline comprise a plurality ofsets of U-shaped pipeline sections, and an ascending section and a descending section of a long-distance pneumatic material conveying pipeline are distributed on the U-shaped pipeline sections; the U-shaped pipeline sections are connected through a plurality of horizontal pipeline sections in a sectional mode; each U-shaped pipeline sections is sequentially composed of the descending section, thehorizontal section and the ascending section according to a material conveying direction of the pipeline, pipelines at the joints between descending sections and horizontal sections are connected withblockage removing pipeline valve group through wear-resistant T-joints, pressure transmitters are arranged on the descending section pipelines and the horizontal section pipelines, and each blockageremoving pipeline valve group comprises a check valve, a regulating valve, a pneumatic shut-off valve and a manual shut-off valve which are sequentially arranged between the wear-resistant T-joint anda compressed air pipeline. The blockage removing method is simple and convenient to operate, can accurately locate the position where the blockage occurs, and can quickly and effectively remove the blockage when a plurality of descending sections are blocked at the same time.

The invention discloses an open separation system. The open separation system comprises a separation machine and is characterized in that the lower end of the separation machine is communicated with a cinder bin, the upper end of the separation machine is communicated with a bag collector through an ash conveying pipe, the lower end of the bag collector is communicated with a fine ash bin, the separation machine is further communicated with a main fan through the ash conveying pipe and an ash-gas mixer, and the ash-gas mixer is communicated with a raw material bin through a discharging machine. The open separation system is mainly used for a coal ash separation system.

The invention discloses lightweight plastering mortar, which is characterized in that the mortar is formed by mixing the following components in part by weight: 20 to 25 parts of common silicate cement, 2 to 4 parts of slaked lime, 5 to 10 parts of light aggregate, 20 to 30 parts of electromagnetic wave absorption master batch, 30 to 50 parts of heavy aggregate and 1.0 part of composite auxiliaryagent, wherein the light aggregate is an inorganic vitrified hollow micropore material with fineness of less than 100 meshes, and the heavy aggregate is common river sand. The construction method comprises the following steps of: diluting the lightweight plastering mortar by adding water in an amount which is 30 to 50 percent of the weight of the mortar, mechanically or manually stirring the mortar till the mortar is mixed uniformly, and mechanically coating the mortar or manually constructing the mortar when the mortar reaches the viscosity suitable for mechanical coating or manual construction. The lightweight plastering mortar with function of shielding and absorbing electromagnetic wave can shield and absorb the outdoor electromagnetic wave, absorb the indoor electromagnetic wave and reduce the diffuse reflection of the indoor electromagnetic wave, is light and energy-saving, reduces the consumption of unit area material and has low unit area manufacturing cost; and when used for a lightweight wall, the lightweight plastering mortar can prevent hollowing, cracking and dropping, is favorable for mechanized construction, and has simple process.

The invention relates to a slurry grouting device and method, belongs to the field of goaf treatment, and particularly relates to a gas-liquid linkage high-concentration slurry grouting device and method for a deep water-rich goaf. The device comprises a gas-liquid linkage grouting sealing sleeve, a high-concentration slurry pipe and a gas pressure pipe, wherein one end of the high-concentration slurry pipe and one end of the gas pressure pipe are connected with the gas-liquid linkage grouting sealing sleeve, and the other end of the high-concentration slurry pipe and the other end of the gaspressure pipe are connected with a grouting pump and a gas pressure pump correspondingly; and a grouting pressure sensor is arranged at the lower end of the high-concentration slurry pipe. According to the device and the method, a slurry filling pumping system and a gas pressure system are arranged in a grouting hole at the same time in the filling process, the gas-liquid linkage grouting device is used for grouting and filling the deep water-rich goaf, and the purposes of effectively preventing the grouting hole and a pipeline from being blocked and controlling the accumulation range and formof high-concentration slurry are achieved.

The invention discloses a coal gangue active activator and high-fluidity high-solid-content cemented filling slurry, and the coal gangue active activator is composed of the following components: 2.5-15 parts by weight of calcined dolomite or calcined limestone, 3-9 parts by weight of silicate, 35-80 parts by weight of caustic soda, 3-22 parts by weight of gypsum and 0.025-1.4 parts by weight of a water reducing agent. The high-fluidity and high-solid-content cemented filling slurry is composed of water and a cemented filling material. The cemented filling material is composed of 65-95 parts by weight of coal gangue and 5-35 parts by weight of a coal gangue activity exciting agent; the mass fraction of water in the high-fluidity and high-solid-content cemented filling slurry is 7.2-9.8 wt%. The coal gangue can be hydrated and hardened to generate enough strength without using cementitious materials such as cement, and the cemented filling slurry is low in water content and good in fluidity, does not shrink after being hardened, and can be well topped due to micro-expansion.

The embodiment of the invention provides a landfill leachate membrane concentrated solution evaporation and concentration method and system. The method comprises the following steps: carrying out primary evaporation and concentration on the landfill leachate membrane concentrated solution; discharging the landfill leachate membrane concentrated solution, which is evaporated and concentrated for the first time, into a flash tank device for flash evaporation and concentration until inorganic salt in the landfill leachate membrane concentrated solution is crystallized, wherein the flash tank device employs a closed-loop evaporation process to carry out flash concentration. According to the invention, a forced circulation and flash evaporation closed-loop evaporation process is adopted for concentration of the landfill leachate membrane concentrated solution; in the evaporation process, after the landfill leachate film concentrated solution is heated by the preheating equipment, a temperature difference exists between the landfill leachate film concentrated solution and the flash tank, so that a flash evaporation process is formed, the problem of pipe blockage of a shell-and-tube heatexchanger in the landfill leachate concentration process is completely avoided, and the tank brushing period is prolonged to the maximum extent.

The invention provides a high-temperature gas-cooled reactor emergency cooling dehumidification system and method. The system comprises a primary water / helium heat exchanger, a secondary water / helium heat exchanger and a gas-water separator, wherein the primary water / helium heat exchanger, the secondary water / helium heat exchanger and the gas-water separator are sequentially arranged from top to bottom. A reactor primary loop refrigerant inlet is formed in one end of the primary water / helium heat exchanger, a primary water inlet and a primary water outlet are formed in the upper portion of the primary water / helium heat exchanger, and a primary refrigerant outlet is formed in the lower portion of the primary water / helium heat exchanger. A secondary refrigerant inlet, a secondary water inlet and a secondary water outlet are formed in the upper portion of the secondary water / helium heat exchanger, and a secondary refrigerant outlet and a secondary condensate water outlet are formed in the bottom of the secondary water / helium heat exchanger. A refrigerant return reactor primary loop outlet is formed in the top of the gas-water separator, a refrigerant inlet is formed in the middle of the gas-water separator, and a separated water outlet is formed in the bottom of the gas-water separator. The secondary condensate water outlet of the secondary water / helium heat exchanger and the separated water outlet of the gas-water separator are communicated with a drainage system. The invention further provides the high-temperature gas-cooled reactor emergency cooling dehumidification method. The system and method achieve the purposes of reactor primary loop dehumidification and emergency cooling.

The invention discloses a method and a system for transmission line cable duct obstacle clearing based on video visualization. The method comprises the steps that: workers send related devices to proper positions at a blocking position; a checking device collects image data in a duct and transmits the data to a control center; the control center constructs a scale space and an image pyramid for the image data, performs positioning for a local extreme point of a differential pyramid, performs data comparison and analysis to determine the blocking condition in the pipeline of the duct and outputs and displays the severity of the blocking of the duct; an obstacle clearing device is started to perform cleaning of the pipeline of the duct and regulates the cleaning force according to the severity of the blocking; and the checking device and the obstacle clearing device in the duct are controlled to perform alternate work according to set programs and time parameters until the blocking in the duct is completely removed, and the checking device and the obstacle clearing device is controlled to be taken back. The method and the system for transmission line cable duct obstacle clearing based on video visualization employ a scientific method to effectively solve the cable duct blocking problem so as to greatly improve the working efficiency.

The invention relates to a rare earth molten salt electrolysis fluorine-containing wastewater treatment method, which adopts continuous operation of 'double calcium method + coagulation + flocculation + precipitation ', and can control the fluorine ion concentration of high-concentration fluorine-containing wastewater to be below 8mg / L. According to the method, on one hand, the problem of easy pipe blockage in industrial production is thoroughly solved, and continuous long-time operation can be realized; and on the other hand, the fluorine ion removal efficiency is further improved, and the treatment cost is reduced. The method has the advantages of simple process flow, high defluorination efficiency, low treatment cost and easiness in sludge sedimentation, and is particularly suitable for industrial production.

An organic solid waste water regulation high-temperature aerobic composting device and a method thereof relate to an organic solid waste composting device and a method thereof. The invention settles the problem of affecting the quality of the composting product, which is caused by the vertical maldistribution of the moisture content of the composted object in the warehouse type forced ventilationcomposting process. The prior mode for adjusting the moisture content has the defects of complicated device and high cost. The conical warehouse top of the device according to the invention is installed on the upper end face of the fermentation warehouse. An annular water collecting groove is provided in the fermentation warehouse. A plurality of water distributors are provided in the fermentationwarehouse. The upper end of the water inlet pipe is communicated with the annular water collecting groove, and the lower end of the water outlet pipe is communicated with a water distributing pipe. The method of the invention comprises the following steps: mixing the organic solid waste with the fermentation conditioner, executing intermittent ventilation, executing water distribution for the composted object through the water distributors in the fermentation process, in the 12-th to 15-th day of fermentation, reducing the temperature of the composted object to less than 40 DEG C, and completing the fermentation process of the composted object. The organic solid waste water regulation high-temperature aerobic composting device and the method according to the invention have the advantagesof: uniform water content of composted object, high quality of the composted product and low cost.

The invention discloses a thoracic and abdominal effusion drainage device. The device structurally comprises a drainage device body, branch tubes, drainage bins, a limiting device and a drainage tube;the branch tubes are arranged in front of the drainage device body, the drainage bins are arranged at the tail ends of the branch tubes and fixedly connected to the drainage device body through the branch tubes, the limiting device is in contact with the surface of one branch tube, and the drainage tube is fixedly disposed under the drainage device body; the drainage tube is composed of a fixer,a transparent catheter, a first side hole, a second side hole and a negative pressure ball, wherein the fixer is arranged on the surface of the drainage tube, and the transparent catheter is arrangedbelow the fixer. According to the thoracic and abdominal effusion drainage device, through arrangement of a branch tube bin of the branch tubes, the multi-connection capability can be conveniently improved; through arrangement of the limiting device, convenience is provided for cooperating with the fixer for limiting and fixing for use; through arrangement of the negative pressure ball, convenience is provided for cooperating with the first side hole and the second side hole, and the catheter is unobstructed conveniently. The device is simple in structure and easy to achieve.

The invention discloses a concrete conveying pump for roads and bridges. The concrete conveying pump for roads and bridges structurally comprises a case, a conveying box, a hydraulic pump, a hopper, an operating panel, a radiator, a moving wheel and a discharging port; the conveying box is positioned at the left side position of the case; the discharging port is formed at the front end of the conveying box; a rotor and a push device are arranged in the case; and aggregate is guided into the hopper, the aggregate is pushed out through cooperation of the push device and a material conveying pipe, the aggregate is rotated and loosened by a six-ring stirrer when coarse aggregate is stacked inside to block the pipe, a threaded material guide groove of a material guide device can guide the aggregate into the groove through rotation of the material guide device, space is reserved in the aggregate, the problem of pipe blockage by stacking can be effectively solved after rotary dredging of thesix-ring stirrer, the material guide device reversely rotates after dredging to discharge the aggregate in the material guide groove into the pipeline, and the aggregate is continuously conveyed through the push device, so the use mode is simple, convenient and rapid, and the problem of pipe blockage can be effectively solved.

A high-concentration salty wastewater MVR (mechanical vapor recompression) evaporative crystallization treatment system comprises a raw material storage tank, a feed pump, a plate heat exchanger, a DTB evaporation crystallizer heating chamber, a DTB evaporation crystallizer, a vacuum evaporation crystallizer heating chamber, a vacuum evaporation crystallizer, a first hydraulic cyclone, a sodium sulfate slurry barrel, a double-stage pusher centrifuge, a vibration fluidized-bed dryer, a first mother liquor storage tank, a first mother liquor pump and a mother liquor circulating pump. The high-concentration salty wastewater MVR evaporative crystallization treatment system is characterized in that the raw material storage tank is sequentially connected with the feed pump, the plate heat exchanger, the DTB evaporation crystallizer heating chamber, the DTB evaporation crystallizer and the vacuum evaporation crystallizer heating chamber. The system is low in comprehensive energy consumption, finally obtained anhydrous sodium sulfate quality meets the requirements of GB / T6009-2014 industrial anhydrous sodium sulfate class-II top quality goods, sodium sulfate content is higher than or equal to 98%, and industrial sodium sulfate meets solarized sodium sulfate secondary standard requirements of national industrial sodium sulfate standards (GBT5462-2003).

The invention relates to an exhaust gas conveying pipe with the electrostatic treatment function. The exhaust gas conveying pipe comprises a pipe body. A gas inlet pipe and a gas outlet pipe are installed at the two ends of the pipe body correspondingly. The pipe body is of a continuous bent structure and comprises multiple layers of up-down transverse pipes and curved pipes connected to the ends of the connected transverse pipes. Dust suction pipes are installed between the transverse pipes which are connected up and down. The dust suction pipes are connected with dust guide pipes correspondingly, and the dust guide pipes are connected with a dust suction header pipe together. The dust suction header pipe is connected with a dust collector. The curved pipes are connected with an electrostatic generator. By the adoption of the continuous bent pipe structure, compared with a traditional straight pipe, occupied space is greatly reduced; the through dust suction pipes are arranged in the conveying pipe, the problems of pipe inner wall scaling and pipe blocking are solved, and therefore halting for clearance is needless, and the influence on production efficiency is avoided; and by the adoption of the electrostatic dust cleaning structure, the anti-blocking effect is better.

The invention discloses a pile bottom grouting device and a use method thereof. The pile bottom grouting device comprises a cone head, a grouting pipe and a rubber non-return sleeve. The cone head isfixed to the bottom end of the grouting pipe, slurry through holes are evenly distributed in the two sides of the bottom of the grouting pipe, the pipe section, provided with the slurry through holes,of the grouting pipe is a grouting section, the rubber non-return sleeve wraps the grouting section, the inner wall of the rubber non-return sleeve covers the surfaces of the slurry through holes, and the upper end and the lower end of the rubber non-return sleeve are fixed to the grouting pipe through fastening devices. The use method of the pile bottom grouting device includes the steps that the position of the grouting pipe is adjusted, the grouting pipe is fixed, a reinforcement cage is hung, concrete is poured, and pile body soil mass is reinforced. According to the device, the poured concrete and the grouting pipe are separated through the rubber non-return sleeve, slurry cannot be injected into the grouting pipe during pile body concrete pouring, the slurry cannot flow back duringgrouting, the smoothness of following slurry pressing is guaranteed, and the problems that during pile end grouting, the grouting pipe is easily blocked, the grouting amount does not meet the requirements, and the grouting pressure is small are solved.

The invention discloses a high-purity barium hydroxide octahydrate purification production system and method, and belongs to the technical field of barium hydroxide octahydrate purification. The system comprises a raw material bin, a mother liquor tank, a dissolving tank, a precision filter, a transfer tank, a DTB crystallization system, a thickener, a centrifugal separator, a dryer, an airflow crusher and an automatic packaging machine which are communicated in sequence. The whole processing process is continuous, and the production process is completed in a closed system, so that the whole operation process is safer while the efficiency is improved.

The invention provides a pressurizing joint for short-distance material conveying, which comprises a pressurizing pipe, a pressurizing device and connecting flanges, and the connecting flanges are arranged at the two ends of the pressurizing pipe; the pressurizing pipe comprises a pressurizing section and fixing sections arranged at the two ends of the pressurizing section, the free ends of the fixing sections are connected with the connecting flange, and the connecting flange is used for connecting the pressurizing pipe and a conveying pipeline; the inner diameter of the pressurizing section is larger than that of the fixing section; the inner diameter of the fixed section is equal to that of the conveying pipeline; a plurality of pressurizing holes are formed in the pipe wall of the pressurizing section; the pressurizing device is communicated with the pressurizing hole and is used for providing pressurizing pressure for the pressurizing pipe; the included angle between the axis direction of the pressurizing holes and the material conveying direction is 30-60 degrees. The pressurizing joint provided by the invention is simple in structure, convenient to connect and not easy to block, and has a huge advantage of conveniently conveying solid-liquid mixed materials.