630 results about "Plug valve" patented technology

The invention provides an air tightness detection device of a pressure balance type plug valve, and relates to the technical field of valve air tightness detection. An air tightness detection device of a pressure balance type plug valve comprises a water pool, an adjusting mechanism, two clamping mechanisms and an end sealing mechanism, the end sealing mechanism comprises two groups of positioning assemblies and two groups of sealing assemblies, and the positioning assemblies and the sealing assemblies are communicated and used for enabling the sealing assemblies to generate axial displacement. The sealing assembly is coaxially arranged in multiple layers, the structures of all the layers of the sealing assembly are the same, the sealing assembly is used for being inserted into an inlet and an outlet of a plug valve to be detected, and by means of the multi-layer design of the sealing assembly and the design that the positioning assembly enables each layer of the sealing assembly to generate independent axial displacement, the plug valve to be detected can be detected. The sealing assembly is adapted to plug valves to be detected with different calibers; the sealing assembly has the action of expansion under the action of air source pressure, so that the part inserted into the plug valve to be detected is in sealed connection with the plug valve, and the sealing performance is ensured.

The invention relates to the technical field of oil field workover treatment, in particular to a rapid blowout wrecking device and method for minor repair operation. According to the technical scheme, a lifting mechanism is installed on workover treatment equipment through a fixing mechanism, a rotary speed reducer is installed at the upper end of the lifting mechanism, a blowout wrecking rotating arm is installed on the upper portion of the rotary speed reducer, the outer end of the blowout wrecking rotating arm is fixedly connected with a fixing base, a turbine is installed in the fixing base, and a rotating short section is installed in the center of the turbine. The lower end of the rotary short section is movably connected with a full-bore plug valve; the worm is installed on one side of the turbine, the worm is driven by the hydraulic cycloid motor to rotate, the worm drives the turbine and the rotary short section to rotate, then the full-bore plug valve is driven to be rotationally connected to an oil pipe of a wellhead, then the switch knob is closed, and blowout wrecking is completed. The full-bore plug valve is installed through mechanical rotation, the follow-up loading function is achieved, potential safety hazards caused by manual installation of the full-bore plug valve are avoided, and rapid blowout wrecking work of blowout is achieved.

The invention relates to the technical field of plug valves, and provides a multi-channel plug valve which comprises a valve body, a valve element, a valve element, a valve element and a valve element. A mounting space is formed in the valve cover; the plug cock is arranged in the valve cavity, can rotate around the central axis of the plug cock and can move along the central axis of the plug cock; the lining is arranged on the inner wall of the valve cavity and matched with the outer wall of the cock; the rotating source is arranged on the valve cover; the selective transmission mechanism is arranged in the mounting space and comprises an input end, a first output end and a second output end; the axial transmission part is movably arranged in the mounting space along the central axis of the cock and is in transmission fit with the second output end; the detection part is arranged on the valve body; and a controller. According to the multi-channel plug valve, the sealing state of the lining can be detected in real time, the plug cock is controlled to axially move to press the lining so as to compensate sealing, and then the sealing performance of the multi-channel plug valve is improved.

The utility model relates to the technical field of coke oven heating, in particular to an economical single-hole combustion chamber temperature adjusting device, which is characterized in that the input end of each heating gas unit I and the input end of each heating gas unit II are respectively connected with a heating gas main pipe; the output end of each first coal gas heating unit and the output end of each second coal gas heating unit are connected with the corresponding combustion chamber, one end of each adjusting unit is connected with the corresponding first coal gas heating unit, and the other end of each adjusting unit is connected with the corresponding second coal gas heating unit. The utility model has the advantages that the structure realizes the communication of the two heating gas main pipes, one regulating valve can be adopted to complete the flow regulation of the two gas heating pipes in the same combustion chamber, and the on-line maintenance and manual regulation are realized by changing the opening position of the T-shaped plug valve; the regulating valve is connected with the stop valve through the three-way connector, it is guaranteed that the regulating valve can be detached at any time when breaking down, and normal production is not affected.

The utility model relates to the technical field of under-pressure plugging, and discloses a plugging device for a high-temperature pipeline, which comprises a plugging machine, a pull rod is connected in the plugging machine in a sliding manner, the lower part of the plugging machine is abutted against a plugging combiner, the lower part of the plugging combiner is abutted against a plugging valve, the lower part of the plugging valve is abutted against a plugging four-way pipe, and the plugging four-way pipe is connected with the plugging machine in a sliding manner. The left side and the right side of the interior of the plugging four-way pipe are fixedly connected with pipes to be plugged, the lower end of the pull rod is in threaded connection with a connector, the interior of the connector is slidably connected with the upper end of a connector, the lower portion of the connector abuts against a plugging rod, and the plugging rod is slidably connected to the middle of the interior of the plugging four-way pipe. According to the plugging device, the plugging rod can be pushed into the plugging four-way pipe through the connector to complete plugging through cooperation among the plugging machine, the pull rod, the connector and the connector, the multiple locking rods and the multiple locking blocks can prevent the plugging rod from moving, and therefore installation of the plugging rod is completed.

The partition bin with the novel gate valve comprises a stock bin, the gate valve, a transition section and a blockage clearing machine which are sequentially connected from top to bottom, the interior of the stock bin is divided into two parts by arranging a partition plate assembly in the vertical direction, and the partition plate assembly is formed by welding steel pipes and steel plates in a staggered mode; the gate valve comprises a discharging port and valve plate arrangement areas located on the two sides of the discharging port, the discharging port is provided with a supporting pipe in the radial direction and corresponds to the bin outlet divided into two parts in a matched mode, and two guide grooves are formed in the inner wall of the discharging port in the direction facing the valve plate arrangement areas. Valve plates are arranged in the valve plate arrangement areas respectively and freely move in the guide grooves by being connected with a reciprocating power mechanism, and the two valve plates can be driven by the reciprocating power mechanism to be opened and closed at the same time or any valve plate can be opened and closed. The blockage clearing machine arranged at the outlet of the transition section can achieve blockage clearing and meet the requirement for rapid feeding. According to the utility model, not only is the service life of the partition plate prolonged, but also the used gate valve is opened on one side or on two sides, so that the single-side or double-side blanking requirement of the partition bin is met, the normal production work in the production peak period is ensured, and the occupied space is smaller.

A universal cap for both male and female connections includes configuration of structural elements allowing the cap to be opened at either end. Optionally, an inner wall feature allows each end of a cap structure to function as its own cap, or perform a separate capping function. For example, should one end of the cap structure be in use, and the other end of the cap structure be open to air, the end of the cap structure in use, or performing the capping function, is not compromised. Optionally, dual ended cap structure includes features designed to maintain the pressure in a closed system, for both the male and female luer lock ends.

The utility model relates to the technical field of coke oven heating, in particular to a mixed gas heating single-hole combustion chamber temperature adjusting device, which is characterized in that the input end of each heating gas unit and the input end of each adjusting unit are respectively connected with a mixed heating gas main pipe, and the output end of each heating gas unit is connected with a corresponding waste gas shutter; the first output end and the second output end of each adjusting unit are connected with the output ends of the adjacent coal gas heating units respectively, and the adjusting units are arranged on the corresponding adjusting coal gas pipelines. The utility model has the advantages that the plug valve A and the plug valve B can be automatically switched in adjacent switching periods by utilizing the switching transmission brace of the existing switch without additionally arranging a transmission device, so that the cost is saved; the plug valves A and B and the exchange plug cocks A and B are located at the same horizontal height, the crank lengths of the cranks A and B and the exchange plug cocks A and B are the same, it is guaranteed that the plug valves A and B and the exchange plug cocks A and B achieve full opening and full closing at the same time, the structure is simple, and implementation is easy.

The invention relates to the technical field of commercial spaceflight, in particular to a self-repairing liquid metal heat pipe for commercial spaceflight, which comprises a polyether-ether-ketone composite pipe, gallium bismuth zinc liquid gold, a micro-nano repairing film, a main hot runner, a pressure detector, a standby hot runner and an emergency plugging valve, and the main hot runner is an axial through channel in the polyether-ether-ketone composite pipe, and the standby hot runners are annularly and circumferentially arrayed along the inner wall of the main hot runner. Compared with heat conduction in the prior art, medium leakage is stopped through cooperative plugging in a damaged scene, so that the heat conduction efficiency is improved, and the service life of the heat exchanger is prolonged. And meanwhile, the detector is in signal linkage with the plugging valve, a heat transfer loop is rapidly switched in the case of serious damage, the continuous and stable thermal control function is achieved, and therefore the on-orbit operation life of a spacecraft is further prolonged.

The gate valve comprises a valve body and a valve element arranged in the valve body in a sliding mode, the valve body is provided with a valve port, the limiting piece is arranged in the valve element, the limiting piece is provided with an anti-vibration structure, at least part of the limiting piece protrudes out of the outer portion of the valve element, and the valve element is arranged in the valve port. The inner side of the valve port is provided with an abutting face which impacts the limiting piece, and the limiting piece moves close to or away from the abutting face relative to the valve body through the valve element so as to close or open the valve port. The limiting piece collides with the abutting face and generates elastic deformation through the anti-vibration structure. According to the gate valve, the anti-vibration structure is arranged at the end, subjected to front impact, of the connecting part, the anti-vibration structure generates elastic deformation under the impact force, so that the buffering effect on the impact force is achieved, vibration and noise are reduced, and the limiting piece and the gate valve are protected advantageously.

The present application relates to a kind of cock valve seat quick assembly process, comprising the following steps: the small end of guide sleeve is installed at the flange of cock valve body;First, valve seat is loaded into the conical shaft hole of guide sleeve from above guide sleeve, then valve seat is pressed into guide sleeve using the big end of pressure block, finally valve seat is pressed into the inner cavity of cock valve body using the small end of pressure block;First, split support block assembly is placed into valve seat, then wedge-shaped block is inserted into wedge-shaped slot between two split support blocks, split support block assembly is opened by pressing wedge-shaped block, so that valve seat is opened;First, cone plug is installed in valve seat, then cone plug is pressed by external force, so that valve seat is opened, finally cone plug is pulled out.The present application ensures the relative position accuracy of valve seat and valve body, valve seat and pressure block, reduces unsafe factors, can guarantee the sealing performance of valve seat, and effectively improves the assembly efficiency of valve seat.

The utility model discloses a petroleum coke auxiliary conveying mechanism, and mainly relates to the field of petroleum coke conveying equipment. Comprising a conveying bin body and a driving part, an eccentric wheel mechanism connected with the driving part is rotationally connected with a driving connecting rod, a plurality of spring plates are obliquely arranged on the bottom face of the conveying bin body, the spring plates are connected to the same vibration frame body, and the vibration frame body is in sliding connection relative to an equipment rack; the vibration frame body is rotationally connected with the other end of the driving connecting rod; a gate valve is arranged at the position of a discharging port of the conveying bin body, a valve body leveling mechanism is arranged at the position of the gate valve in a matched mode, and when the valve body leveling mechanism is arranged above the gate valve in a matched mode, the valve body leveling mechanism is flush with the conveying face in the conveying bin body. The utility model has the beneficial effects that the problem of accumulation of a large amount of calcined petroleum coke at the arrangement position of the gate valve can be avoided, so that the normal conveying of the calcined petroleum coke by the vibration conveying platform is ensured.

The invention provides a micro-plastic filling permeation immersion type interface coupling reaction experiment device which comprises a rectangular frame, a reaction column cylinder, a T-shaped strip and an iron convex block, a piston rod is movably arranged in the reaction column cylinder, a material guide pipe is arranged at the upper end of the right side of the reaction column cylinder, and a micro plug valve is arranged at a liquid inlet in the lower end of the reaction column cylinder. Guide grooves are formed in the left side and the right side of the interior of the rectangular frame, a magnetic block is installed on the upper portion of the interior of the rectangular frame, a U-shaped iron frame is fixed to the upper end of the right side of an iron protruding block, and a positioning rod is installed at the right end of the lower portion of the U-shaped iron frame in a penetrating and sliding mode. And the reaction solution uniformly permeates through the filling layer by utilizing the negative pressure of the driving core, so that the full-domain immersion type full contact between the micro plastic particles and the reaction solution is realized.

The present application relates to a top drive plug valve, relates to the field of oil and gas drilling and well control equipment, the cone barrel is coaxially arranged in the valve body, and is arranged close to the feed end of the valve body, the valve core is arranged close to the discharge end of the valve body, the cone barrel and the side wall of the valve body form an annular cavity, the cavity has an inlet close to the feed end of the valve body and an outlet close to the discharge end of the valve body, the inlet and the outlet are respectively provided with a feed one-way assembly and a discharge one-way assembly, the feed one-way assembly and the discharge one-way assembly enable the fluid to flow unidirectionally from the inlet to the outlet of the cavity, and the inner diameter of the cone barrel gradually decreases in the direction from the feed end to the discharge end of the valve body. The beneficial effects of the present application are: the structure design is reasonable, the structural parts are few, the stability is high, the application range is wide, the service life is long, and the opening and closing torque of the top drive plug valve under unbalanced pressure can be effectively reduced.

The invention discloses a plug valve. The plug valve comprises a valve body, a rotating part, a valve element plate and a sealing piece, the valve body comprises a first valve body and a second valve body, a first conveying pipeline is formed in the first valve body, a second conveying pipeline is formed in the second valve body, and the first conveying pipeline and the second conveying pipeline can be arranged in a communicating mode; the rotating part comprises a driving shaft and a connecting piece, one end of the connecting piece is connected with the driving shaft, the driving shaft is suitable for driving the connecting piece to rotate, and a through hole penetrating through the connecting piece is formed in the other end of the connecting piece; the valve element plate is connected with the connecting piece, and when the connecting piece rotates, the valve element plate is suitable for opening or closing the first conveying pipeline; the sealing piece is arranged in the through hole and can move towards or away from the valve element plate. The plug valve provided by the invention has relatively good sealing performance.

The application belongs to the technical field of faucet valve processing, and particularly relates to a tungsten carbide processing technology for a faucet valve sealing structure. The tungsten carbide coating formed by the shielding part and the valve plug surface in one body during spraying causes damage to the coating on the valve plug surface when the shielding part is disassembled, and affects the spraying quality. The following scheme is proposed, including base pretreatment, complete cleaning of the spraying surface by using alkaline cleaning liquid + mechanical treatment to remove surface oil stains and keep the surface clean; the spraying surface needs to be preheated before sand blasting to remove surface moisture and improve the bonding quality of the powder and the surface of the part, and the suitable preheating temperature of the base surface is 60-90 DEG C. The tungsten carbide processing technology for the faucet valve sealing structure has the effect of guaranteeing the spraying quality of the tungsten carbide coating. When spraying, the device can separate the coating of the base passage area from the coating of other parts before the spraying of the tungsten carbide coating is completed, so that damage to the coating after the spraying is completed is avoided.

The utility model relates to the technical field of pressure control in the petroleum industry, in particular to a constant pressure type multi-stage pressure relief protection skid device. According to the technical scheme, a first high-pressure T-shaped connector, a second high-pressure T-shaped connector and a third high-pressure T-shaped connector are installed between a high-pressure straight pipe and the outlet end of the high-pressure straight pipe, an outlet in the upper end of the first high-pressure T-shaped connector is connected with a first plug valve and a low-order safety valve, and an outlet in the upper end of the second high-pressure T-shaped connector is connected with a second plug valve and a middle-order safety valve. An outlet in the upper end of the third high-pressure T-shaped connector is connected with a third plug valve and a high-order safety valve, and the outlet ends of the low-order safety valve, the middle-order safety valve and the high-order safety valve are connected to a low-pressure straight pipe through an elbow assembly and a straight pipe assembly respectively. The utility model has the beneficial effects that gradient pressure protection is realized, and the problem of protection failure of a single safety valve is avoided; impact on the pipeline caused by sudden pressure drop is also prevented, and the service life of equipment is prolonged; the durability of the device is improved, the potential safety hazard is reduced, and the maintenance cost is reduced.

1. The name of the design product: plug valve body. 2. The use of the design product: the design product is a plug valve body for cutting off, distributing and changing the flow direction of medium in pipeline. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to a plug valve which comprises a valve body, a lower valve seat is arranged on the portion, close to the right side, of an inner cavity of the valve body, an upper valve seat is arranged on the left side of the lower valve seat and located on the portion, close to the left side, of the inner cavity of the valve body, a first O-shaped ring and a check ring are arranged on the edge of the outer side of the lower valve seat, and a second O-shaped ring and a check ring are arranged on the edge of the outer side of the upper valve seat. A ball core is jointly arranged between the lower valve seat and the upper valve seat, a switch is arranged at the top of the ball core, and a plane bearing is arranged at the position, close to the bottom, of the edge of the outer side of the switch. A low-friction-resistance structure is adopted, the switching torque of the plug valve can be effectively reduced, and low-torque switching of the plug valve in the pressure bearing state is achieved; therefore, the ball valve can be rotated by 90 degrees by rotating the cross joint through a special handle, opening and closing are achieved, blowout accidents are prevented, and use is convenient and reliable.

The invention discloses a zirconium material hard sealing plug valve and a welding preparation process thereof, and relates to the technical field of plug valves, and the plug valve comprises a valve body assembly, a plug body assembly, a heat preservation sleeve assembly, a connecting shaft, an executing mechanism, an electric control cabinet and a remote control system; a plug body assembly is arranged in an inner cavity of the valve body assembly, the end, away from the valve body assembly, of the plug body assembly is connected with an executing mechanism through a connecting shaft, and the end, away from the connecting shaft, of the executing mechanism is sequentially connected with an electric control cabinet and a remote control system through transmission lines. A heat preservation sleeve assembly is arranged outside the valve body assembly. According to the plug valve, the part, in direct contact with the medium, of the plug valve is made of the zirconium material so as to achieve the anti-corrosion effect, the part, not in direct contact with the medium, of the plug valve is made of the non-zirconium material so as to achieve the effect of saving the manufacturing cost, and application and popularization of the zirconium plug valve cannot be limited.

1. The name of the design product: manual plug valve. 2. The use of the design product: the design product is a device for controlling the opening and closing of a pipeline. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to the field of kitchen utensils, and particularly discloses a stove, which comprises a plug valve, a burner, an inner ring air passage and an outer ring air passage, the inner ring gas channel and the outer ring gas channel are connected between the plug valve and the combustor; the stove further comprises a fire control valve; the fire control valve comprises a shell, an outer ring electromagnetic valve and an inner ring electromagnetic valve; an outer ring channel, an inner ring channel, a first inner ring closure channel and a second inner ring closure channel are arranged in the shell; one end and the other end of the first inner ring intercepting channel are respectively communicated with the upstream side and the downstream side of the inner ring electromagnetic valve of the inner ring channel; and one end and the other end of the second inner ring intercepting channel are respectively communicated with the downstream side of the inner ring electromagnetic valve of the inner ring channel and the upstream side of the outer ring electromagnetic valve of the outer ring channel. According to the stove, the fire control valve is arranged between the plug valve and the combustor, so that different fire powers can be adjusted according to different cooking scenes, the fire adjustment states are more, and fire adjustment is more intelligent.

The invention relates to the technical field of wellhead devices, in particular to a wellhead manifold with a particle filtering function, which comprises a main pipe, an auxiliary pipe, a filter tank, an oil guide tank and a U-shaped filter frame. The top of the oil guide tank is communicated with a pipeline in the well, and the interior of the oil guide tank is connected with the filter tank through an oil guide pipe. One end, far away from the main pipe, of the U-shaped filter frame is connected with an impurity discharge pipe; the impurity scraping mechanism comprises a scraping plate, a U-shaped frame and a driving assembly, and the scraping plate can reciprocate in the U-shaped filter frame. The driving assembly enables the U-shaped frame to drive the scraper to be in a vertical scraping state in the first direction and in a horizontal recovery state in the second direction, so that automatic cleaning of the filtering surface is realized, blockage is prevented, and continuous and stable filtering is guaranteed. The U-shaped filter frame structure and the plug valve are matched with the one-way valve, so that the impurity and oil separation efficiency and the anti-backflow capacity are improved, the operation reliability of the manifold system is enhanced, and the particle-containing oil treatment efficiency and safety are improved.

The utility model relates to a plug valve for blowout prevention, belong to petroleum industry drilling, well repairing technical field, including plug valve body and the ball valve switch of setting in the middle part of plug valve body, the outside wall of plug valve body is equipped with the clamping body, the clamping body sets up the top of ball valve switch to make the operator hand -held clamping body installs plug valve in the well mouth. The utility model discloses the clamping body on the outside wall of plug valve body sets up, the clamping body sets up the top of ball valve switch, namely, close to the upper part of plug valve body sets up, to make the operator hand -held clamping body installs plug valve in the well mouth, the installation of plug valve is convenient, avoids the smooth surface of the outside wall of plug valve body and makes the operator hand -held when easy to slip and causes the safety accident, provides the clear hand -held force point for plug valve, improves plug valve installation efficiency and solves the corresponding security risk simultaneously.

The plug valve for the oil exploitation equipment comprises a valve body internally provided with a flow guide channel and a valve element installed in the middle of the flow guide channel, an installation opening is formed in the upper portion of the valve body, a rotating rod is installed in the installation opening in a rotating mode, the upper end of the rotating rod is connected with a hand wheel, and the lower end of the rotating rod is connected with the valve element. A guide groove is formed in the rotating rod, a dredging assembly is inserted into the guide groove in a penetrating mode, the dredging assembly comprises a pressing block, a floating rod, a reset spring and deformation type stripping pieces, the lower end of the pressing block is connected with the floating rod, the upper end of the floating rod is sleeved with the reset spring, and the deformation type stripping pieces are symmetrically installed at the lower end of the floating rod; an inserting opening is formed in the upper end of the valve element, a guide ball is fixed to the middle of the inserting opening, the two deformation type stripping pieces are located on the two sides of the guide ball respectively, and a flow guide opening is formed in the valve body. According to the plug valve designed by the utility model, the inner wall of the flow guide opening of the valve core can be quickly dredged, so that the petroleum flow guide effect of the plug valve is ensured.

The invention discloses a kelly bar plug valve for oil field drilling and production, and belongs to the field of oil drilling and production equipment. A cavity is formed in the valve body, a valve element is rotationally inserted into the cavity, and a through hole penetrating through the side wall of the valve element is formed in the side wall of the valve element. A water inlet pipe and a water outlet pipe are respectively inserted into the opposite side walls of the cavity; extension lines of the water inlet pipe and the water outlet pipe are positioned on the same straight line; the valve element is provided with a buffering bin. According to the scheme, through mutual cooperation of the surge bin and the liquid inlet, in the clockwise rotation process of the valve element, the liquid inlet is gradually communicated with the water inlet pipe, at the moment, part of fluid discharged from the water inlet pipe enters the surge bin, the valve closing speed is high, the surge bin cannot be filled with the fluid, and therefore the pressure of the fluid entering the surge bin is not enough to open the pressure release valve; part of fluid penetrates through the through hole, and in the process, the effect of preventing impact force borne by the valve element from being increased is achieved, so that friction force between the valve element and the valve body is prevented from being increased, and the effect of reducing the abrasion degree of the valve element and the valve body is achieved.

This application discloses a zirconium-coated hard-seal plug valve and its welding process, relating to the field of plug valve technology. The plug valve includes: a valve body assembly, a plug assembly, an insulation sleeve assembly, a connecting shaft, an actuator, an electrical control cabinet, and a remote control system. The plug assembly is housed within the valve body assembly. The end of the plug assembly furthest from the valve body assembly is connected to the actuator via the connecting shaft. The end of the actuator furthest from the connecting shaft is sequentially connected to the electrical control cabinet and the remote control system via a transmission line. An insulation sleeve assembly is provided externally to the valve body assembly. This application selects zirconium as the material for the parts of the plug valve that directly contact the medium to achieve corrosion resistance, while using non-zirconium materials for the parts that do not directly contact the medium to save manufacturing costs and without limiting the widespread use of zirconium-coated plug valves.

The present application relates to a kind of alkali recovery furnace water washing process, the process includes the following steps: step one: after alkali recovery furnace shutdown, open disc valve, plug valve and hearth furnace door, carry out hearth cooling;Step two: after cold furnace, washing water is pumped to alkali recovery furnace soot blower by feed water pump, by soot blower flushes the surface of heat exchange element, and the slagging and coking material therein is cleaned up completely;Washing waste water is recycled by dissolving tank and venting tank;Step three: after washing furnace, by hot air into air supply system, air draft system exhaust, dry hearth and heat exchange element;Step four: after drying furnace, in chute pouring castable, repair the part that is washed away by combustion melt and washing water, a kind of alkali recovery furnace water washing process designed by the present application can conveniently clean ash and remove coke with high efficiency, good effect, can effectively guarantee the cleanliness of heat exchange element, improve alkali recovery furnace operating efficiency.