39results about How to "Solve the fouling problem" patented technology

The invention provides a method for treating desulfurization wastewater in a power plant. The method comprises the following steps: pretreating the desulfurization wastewater to obtain primary clarified liquor; enabling the primary clarified liquor to enter a filtering device to be filtered; providing a four-compartment electrodialyzer to perform ion recombination on ions in each water flow channel unit through an electric drive effect; further enabling produced water of each water flow channel unit to pass through a nanofiltration system to perform salt separation treatment, concentrating by utilizing an electrodialysis system, and desalinating the wastewater by utilizing a reverse osmosis system. According to the method disclosed by the invention, salts in the wastewater which are easy to scale are subjected to ion recombination so as to form soluble salts which are difficult to scale, so that the problem of scale formation in subsequent electrodialysis equipment or a high-pressure reverse osmosis system is solved. Moreover, according to the nanofiltration system for concentration, the electrodialysis system or the high-pressure reverse osmosis system, the content of total soluble solids in the wastewater is 8-16%, and the recovery rate of 80-90% of the wastewater is realized.

The invention discloses a system and a method for processing rubbish percolate. The system comprises a collecting pool, a middle pool, a vibrating film nano-filtration device and an evaporation device, wherein the vibrating film nano-filtration device comprises a shell, a diaphragm set and a motor; the diaphragm set downward extends, thereby forming a central driving rod; the motor and a belt areused together for driving an eccentric block on the central driving rod to rotate so as to generate a centrifugal force which can trigger vibration; the diaphragm set is driven to vibrate by energy generated from vibration, with the help of the central driving rod; and a shearing force which is generated by high-frequency vibration is spread in a sine form by the surface of a diaphragm in the diaphragm set, thereby efficiently solving a chocking problem of the diaphragm in the diaphragm set, achieving higher capability of resisting diaphragm pollution, realizing simple and efficient treatmentfor the rubbish percolate and achieving a better treating effect. A recycling system which is composed of the collecting pool, the middle pool and the evaporation device is used for continuously and efficiently separating clean liquid from concentrated liquid. The clean liquid meets the standard and is discharged. The concentrated liquid is evaporated and treated by the evaporation device, thereby achieving the purposes of reducing emission and reducing wastes.

The invention relates to a horizontal flow precipitation separation device. The horizontal flow precipitation separation device is characterized by comprising multiple corrugated plates arranged in a precipitation pond, wherein each corrugated plate is vertically arranged relative to a horizontal plane, the adjacent corrugated plates are symmetrically arranged and are spaced, and the smallest interval of the adjacent corrugated plates serves as a sludge discharging channel. Compared with the prior art, the horizontal flow precipitation separation device preserves the advantages that a flow direction and a precipitate sludge discharging direction are mutually vertical without interfering with each other, the disturbance between the horizontal flow and a precipitate is avoided, the submerged sludge is prevented from suspending again, meanwhile, a sludge discharging manner is optimized, the vertical sludge discharging channel is adopted, when stream horizontally flows through a stream channel, suspended solids are collided with a frame of the stream channel to rapidly precipitate, and slide downwards along the frame to enter the sludge discharging channel so as to directly precipitate to the bottom of the precipitation pond, and a wobble plate does not need to bear load, so that a problem of load-bearing of the wobble plate caused by large precipitate quantity is solved.

The invention discloses a recycling system and method of electroplating pretreatment sewage. The system comprises an electroplating pretreatment device, a collecting pool, a vibration membrane ultrafiltration device and a moderate pool, wherein the vibration membrane ultrafiltration device comprises a casing and a membrane unit and a motor which are installed in the casing; and the membrane unit is provided with a center transmission rod which downwardly stretches, thus an eccentric block on the center transmission rod is driven by the motor through a belt to rotate, so that a generated centrifugal force can trigger swing, and energy generated by swing promotes the membrane unit to vibrate through the center transmission rod, thus the silting problem of a membrane in the membrane unit is effectively solved, the capacity of resisting membrane pollution is stronger, sewage is simply and effectively treated, and treatment effect is better; the electroplating pretreatment device, the collecting pool and the moderate pool are coordinated and utilized to constitute a sewage recycling system so as to persistently and effectively separate out a clear liquid and a concentrated liquid; and the clear liquid is input into the moderate pool, subjected to oil removal and then recycled to the electroplating pretreatment device, thereby reducing water use amount and oil-removing powder use amount and achieving the purpose of reducing emission and reducing wastes.

The invention discloses an over-frequency vibrating separator and a separating system. The over-frequency vibrating separator comprises a casing, a membrane set and a motor. A central driving rod is extended from the membrane set and is equipped with an eccentric block and first flange at a lower end thereof; an output terminal of the motor is provided with a second flange which is flexibly connected with the first flange through a belt. Thereby, the motor drives the eccentric block on the central driving rod to conduct eccentric exercise in order to initiate swing, and energy generated from swing promotes vibration of the membrane set through the central driving rod; when a rotating speed of the motor reaches a frequency required by a resonance environment, the vibrating amplitude of themembrane set reaches the maximum, and the shearing force generated by the membrane set transmits in a sine mode through diaphragm surfaces in the membrane set, so as to effectively solve a problem ofdiaphragm stagnation in the membrane set. The over-frequency vibrating separator, a charge pump, a charging cylinder and a filtering hydraulic cylinder form a separating system in order to separate afiltrate continuously and effectively and realize a higher sewage recovery utilization rate; meanwhile, a lot of energy can be saved to bring good economic and social benefits for an enterprise.

The invention discloses a non-scaling heating assembly. The non-scaling heating assembly comprises a heater and a heat exchange tube arranged in the heater. The feed end of the heat exchange tube is communicated with a lower circulation feed tube through a forced circulation pump, the discharge end of the heat exchange tube is communicated with the feed end of a solid-liquid separator, the bottom of the solid-liquid separator serves as a solid discharge end, the solid discharge end is communicated with a particle storage tank, inert solid particles are added into the particle storage tank, and the discharge end of the particle storage tank is communicated with the heat exchange tube through a distributor. By means of the non-scaling heating assembly, the inert solid particles are added into the heat exchange tube, the scale induction period can be greatly prolonged, an existing scale layer can be flushed away, the cleaning period can reach 8,000 hours or above (in a continuous working state), the inner wall of equipment is kept bright and clean, the service life of the equipment is prolonged, and great economic benefits, environmental benefits and social benefits are achieved.

The invention relates to a novel sewage treatment device. The novel sewage treatment device comprises a reaction tank, wherein the reaction tank is separated into an aerobic zone, an anaerobic oxygen-poor zone and an anaerobic zone; the side wall is provided with a water inlet hole and a mud scraper is arranged at the bottom; a mud bucket is arranged below the reaction tank; the mud bucket is internally provided with a pushing device; a separation plate is provided with an aeration device and is accumulated with an AO reactor; a water passing hole and a water passing weir are arranged on the upper part of the reaction tank; a sludge reflowing hole and a liquid supernatant reflowing hole which is connected with a liquid supernatant pumping-out hole of a sedimentation basin are formed in the side wall of the reaction tank; the sedimentation basin and the reaction tank share one side wall; the sludge reflowing hole on the lower part of the sedimentation basin is communicated with the bottom of the sedimentation basin; the sedimentation basin is internally provided with a horizontal flow sediment separation device; a clean water outlet hole is formed in the side wall of the sludge sedimentation basin; the clean water outlet hole is formed above the horizontal flow sediment separation device; a water outlet weir is arranged on the outer side wall of the sedimentation basin. According to the novel sewage treatment device, the plane occupied area is greatly reduced; organic carbon in raw water can be sufficiently utilized to be used as a carbon source needed by a denitrification process of the oxygen-poor zone can be sufficiently utilized so that the adding amount of the additionally-arranged carbon source is reduced and the whole performance of a sewage treatment system is strengthened.

The invention discloses a system and a method for treating organic wastewater of a circuit board. The system comprises circuit board processing equipment, a collection pool, a vibration film ultrafiltration device, a reverse osmosis device and an incinerator, wherein the vibration film ultrafiltration device comprises an enclosure, a membrane module and a motor, wherein the membrane module downwards extends to form a central rotating rod, therefore, swing can occur by using a centrifugal force generated by matching and utilizing the motor and a belt to drive an eccentric block on a central driving rod to rotate; energy generated by swing promotes the membrane module to vibrate through the central driving rod; and a shear force generated by high-frequency vibration is spread through a membrane surface in the membrane module in a sine force, thereby the silt of the membrane in the membrane module is effectively overcome and the simple and effective treatment of the organic wastewater ofthe circuit board is realized. The treatment system can be used for continuously and effectively separating clear solution from concentrated solution; the clear solution is input into the reverse osmosis device for RO (Reverse Osmosis) advanced treatment and then is recycled to the circuit board processing equipment, so that the cost is saved; and the concentrated solution is incinerated and treated by using the incinerator, and thus the goals of reducing emission and waste are achieved.

The invention relates to the field of environmental protection, and concretely relates to a method for purifying salt-containing wastewater in a waste incineration fly ash process. According to the method, a scale inhibitor and an ultrasonic scale prevention technology are combined, the scaling problem of an evaporator is solved, carbon dioxide is used for replacing sodium carbonate, pH is adjusted, liquid caustic soda is used in cooperation with transformation of a horizontal screw centrifuge to properly adjust an existing water treatment system, and it is guaranteed that the inflow water quality of a distillation unit is in a controllable state. In addition, two-stage distillation operation is adopted, the sizes of the evaporator and the crystallizer are adjusted, and the problems that an existing evaporative crystallization system is large in evaporator size, small in crystallizer size, prone to scaling and high in failure rate are solved. The designed elastic allowance is sufficient, the system adjustability is good, and it is ensured that equipment can continuously and stably operate under the condition that the feeding concentration and the feeding amount fluctuate. The method for purifying the salt-containing water has the characteristics of controllability, adjustability and easiness in operation.

The invention discloses a descaling separation assembly which comprises a separator sealed tank body, a feed liquid nozzle and a heating pipe, wherein the feed liquid nozzle is arranged in the separator sealed tank body, the heating pipe is matched with the separator sealed tank body for use, the feed liquid nozzle is arranged at the upper part, and the heating pipe is arranged at the lower part and used for receiving feed liquid sprayed by the feed liquid nozzle; inert solid particles and a compressed air pipe which is used for producing air flow to blow the inert solid particles to fluidized state boiling are arranged at the bottom of the separator sealed tank body. By the aid of using of the descaling separation assembly, on-line cleaning can be realized, the equipment can operate for a long time and is not required to be cleaned with other methods, the inner wall of the equipment can be kept to be smooth and clean as new simultaneously, the service life of the equipment is prolonged, and the device has great economic benefit, environmental benefit and social benefit.

The invention discloses a water purifying machine with the pure-water-membrane-soaking function during stopping resting. The water purifying machine comprises an original water end, a water feeding electric valve, a filter element mechanism, a boosting pump and a RO membrane module, and also comprises a check valve, a pure-water storage tank, a high-water-level floating ball switch, a low-water-level floating ball switch, a water feeding pump and a micro-wastewater-ratio-combination electromagnetic valve, wherein the original water end, the water feeding electric valve, the filter element mechanism, the boosting pump and the RO membrane module are sequentially connected through a pipe. A pure water outlet in the RO membrane module is connected with a water returning pipe and a water discharging pipe; the water returning pipe is provided with the check valve, and the water discharging pipe is provided with the pure-water storage tank, the water feeding pump and a pure water faucet; a thick water outlet in the RO membrane module is connected with the micro-wastewater-ratio-combination electromagnetic valve, and the micro-wastewater-ratio-combination electromagnetic valve is connected with a sewer for discharging; the high-water-level floating ball switch and the low-water-level floating ball switch are arranged in the pure-water storage tank. By means of the water purifying machine with the pure-water-membrane-soaking function during stopping resting, in the using process of a traditional RO water purifying machine, the problem that as the traditional RO water purifying machine is located in thick-water membrane soaking during resting stopping, the initial water-making TDS value of the RO water purifying machine is higher than the standard value is solved, and the membrane-surface scaling problem caused when a RO membrane sheet is soaked with thick water for a long time is solved.

The invention discloses a novel water purifying machine with the pure-water-membrane-soaking function during stopping resting. The novel water purifying machine comprises a water feeding electric valve, a filter element mechanism, a boosting pump, a RO membrane module, a check valve, an one-in-two-out electric valve, a pure-water storage tank, a high-voltage switch, a pure water faucet and a micro-wastewater-ratio-combination electromagnetic valve which are sequentially connected through a pipe. The water feeding electric valve is connected with a water inlet of the boosting pump through the filter element mechanism, a water outlet of the boosting pump is connected with the RO membrane module, and a pure water outlet of the RO membrane module is connected with a water returning pipe and a water discharging pipe; the water returning pipe is provided with the check valve and connected with the water inlet of the boosting pump; the water discharging pipe is provided with the one-in-two-out electric valve, the pure-water storage tank, the high-voltage switch and the pure water faucet; a thick water outlet of the RO membrane module is connected with a sewer through the micro-wastewater-ratio-combination electromagnetic valve. By means of the novel water purifying machine with the pure-water-membrane-soaking function during stopping resting, in the using process of a traditional RO water purifying machine, the problem that as the traditional RO water purifying machine is located in thick-water membrane soaking during resting stopping, the initial water-making TDS value of the RO water purifying machine is higher than the standard value is solved, and the membrane-surface scaling problem caused when a RO membrane sheet is soaked with thick water for a long time is solved.

The invention relates to an automatic dredging system and method for relieving waterlogging and solving problem of silt up of a drainage pipe network. 1, the invention belongs to the field of municipal drainage, and relates to a rainwater pipe network automatic dredging system including a rainwater well, a sludge siltation well, and a sludge dewatering well (Figure 1-6). 2, the invention can be directly arranged on an existing rainwater well and an existing old rainwater pipe network, upgrading and reconstruction can be performed on a rainwater well of a pipe having serious sludge siltation, and the problem that the sludge siltation of the drainage pipes is difficult to clean can be solved. 3, the automatic dredging system and method are suitable for old rainwater pipe networks and newly constructed rainwater pipe networks, and can solve the problem that sand in rainwater flows to the rainwater pipe networks to cause sand sedimentation, the sand sedimentation causes poor drainage or silt up of the rainwater pipe networks, and results in city waterlogging. 4, sludge in a dewatering barrel in the sludge dewatering well can be sucked in a tank via a tank dirt suction vehicle to be transported, or can be hoisted in a rubbish truck to be conveyed.

The invention discloses a method for recycling biogas slurry and a vinasse clear liquid and producing ethanol, and belongs to the technical field of wastewater treatment and ethanol fermentation industries. Calcium oxide is added into the biogas slurry obtained through anaerobic digestion to soften the biogas slurry, the softened biogas slurry is deaminized and then is mixed with the vinasse clearliquid, membrane separation is performed, and obtained filtrate returns to a crushing and mixing section as mixing water. After the biogas slurry is softened, the concentration of calcium ions is reduced to 20 mg / L or below, so the scaling problem of calcium carbonate in subsequent deamination and membrane separation operation is solved, and the device investment and operation cost of membrane separation are reduced; single-stage or multi-stage high-vacuum negative-pressure deamination is adopted, so that the risk of atmospheric secondary pollution is avoided, and the deamination operation cost is greatly reduced; and the biogas slurry and the vinasse clear liquid are mixed and subjected to membrane filtration, so bacteria in the biogas slurry and the vinasse clear liquid are eliminated,smooth ethanol fermentation is guaranteed, the operation pressure is lower than that of a tubular ultrafiltration membrane, and the operation cost is low.

The invention discloses a method for treating easily-scaled salty wastewater. The method comprises the following steps: A, preliminarily clarifying and filtering the wastewater to remove suspended particles in the wastewater; B, carrying out ion grouping on the wastewater by a first electrodialyzer; and C, respectively independently carrying out secondary concentrating on first compartment produced water and third compartment produced water: conveying the first compartment produced water into a second concentrating device to obtain corresponding first freshwater and first concentrated water, conveying the first freshwater into a first compartment, adding pure water into the first compartment, conveying the third compartment produced water into a third concentrating device to obtain third freshwater and third concentrated water, conveying the third freshwater into the third compartment, and adding pure water, commonly used as third compartment feed water, into the third compartment. Themethod has the advantages of realization of easily scaled ions, prevention of scaling in an apparatus, low running cost, small volume of concentrated water, and large amount of reused freshwater.

The invention discloses a device for collecting fallen leaves on an ecological slope. The fallen leaf collecting tank has open and non-closed ends at both ends for collecting fallen leaves; The invention specifically solves the problem of confusion in the fallen leaf collection box. The hollow grid of the fallen leaf collection box is placed obliquely to prevent the fallen leaves from entering the area under the action of water flow and being taken out of the collection box when they encounter backflow.

The invention relates to a treatment method for sea water decalcification through equilibrium adsorption of a centrifuge, comprising the specific steps of: (1) mixing an adsorption material with water and preparing slurry; (2) standing the slurry obtained in the step (1) for 4-6 minutes, precipitating the material and pouring out the supernatant water, thereby obtaining the subsurface material which is a water mixture; (3) feeding the water mixture into the centrifuge at the feeding speed of 0.6-1 m3 / h under the control of a pump, and centrifuging to obtain the filtrate, namely the decalcified sea water. The method for sea water decalcification provided by the invention is simple, the ion exchange capacity in the method is greater than 2 mol Ca<2+> / kg, adsorptione equilibrium is established in 0.3 seconds, and therefore, the sea water decalcification time is greatly shortened and the production cost of the enterprise is saved. The adsorption material used in the method is an amorphous-state inorganic ion exchange material; and the adsorption material can be used under the condition of 0-250 DEG C, and as a result, the method is convenient to operate and the production efficiency is improved.

The invention relates to a novel sewage treatment device. The novel sewage treatment device comprises a reaction tank, wherein the reaction tank is separated into an aerobic zone, an anaerobic oxygen-poor zone and an anaerobic zone; the side wall is provided with a water inlet hole and a mud scraper is arranged at the bottom; a mud bucket is arranged below the reaction tank; the mud bucket is internally provided with a pushing device; a separation plate is provided with an aeration device and is accumulated with an AO reactor; a water passing hole and a water passing weir are arranged on the upper part of the reaction tank; a sludge reflowing hole and a liquid supernatant reflowing hole which is connected with a liquid supernatant pumping-out hole of a sedimentation basin are formed in the side wall of the reaction tank; the sedimentation basin and the reaction tank share one side wall; the sludge reflowing hole on the lower part of the sedimentation basin is communicated with the bottom of the sedimentation basin; the sedimentation basin is internally provided with a horizontal flow sediment separation device; a clean water outlet hole is formed in the side wall of the sludge sedimentation basin; the clean water outlet hole is formed above the horizontal flow sediment separation device; a water outlet weir is arranged on the outer side wall of the sedimentation basin. According to the novel sewage treatment device, the plane occupied area is greatly reduced; organic carbon in raw water can be sufficiently utilized to be used as a carbon source needed by a denitrification process of the oxygen-poor zone can be sufficiently utilized so that the adding amount of the additionally-arranged carbon source is reduced and the whole performance of a sewage treatment system is strengthened.

The invention relates to a farmland machinery carrying platform. Under the instructions of a PC, a PLC, an execution circuit and a variety of kinds of sensors can form a complete intelligent automated program, and under the support of the intelligent automated program, the farmland machinery carrying platform is composed of two rate adjustment motors which are matched with each other, a left truck body and a right truck body which are symmetrical to each other, driving wheels, driven wheels, two hydraulic lifting frames and a carrying platform. The farmland machinery carrying platform is characterized in that the left truck body and the right truck body are respectively provided with a main motor which is connected with a corresponding wheel support and a corresponding driving wheel through a commutator; one end of the lower surface of the left truck body and one end of the lower surface of the right truck body are respectively connected with one driven wheel; the left truck body and the right truck body are provided with the two sets of hydraulic lifting frames; the lower ends of the lifting frames are connected with the truck bodies; the upper ends of the lifting frames are connected with the carrying platform; and therefore, a complete lifting carrying platform can be formed, and can walk on a special rail in a farmland and can finish all management work in the farmland from such as land cultivation, sowing and harvesting. With the farmland machinery carrying platform of the invention adopted, no workers are needed to drive and operate the farmland machinery carrying platform, and people can realize fully automatic control through utilizing the Internet based on computers.

The invention relates to a treatment method of equilibrium adsorption seawater decalcification of a plate-and-frame filter press. The treatment method comprises the following steps: (1) dispersing an adsorption material by water, and preparing into size; (2) adding the seawater to the size type adsorption material prepared in step (1), and stirring for 1 to 2 minutes so as to obtain the mixed size; and (3) pouring the mixed size into the plate-and-frame filter press, and remaining the adsorption material in the plate-and-frame filter press, so as to obtain the filtrate which is the decalcified seawater. The treatment method of equilibrium adsorption seawater decalcification of the plate-and-frame filter press is simple in process, sufficient in reaction, good in decalcification effect, fast in filtering, and high in production efficiency. By adopting the scheme, the filtering area reaches 600m<2>, and the solution flow is of about 500m<3> per hour. According to the treatment method, the ion exchange capacity is more than 2mol Ca2+ / kg, and the equilibrium adsorption can be realized by 0.3 second, so that the decalcification time of seawater is greatly reduced, and the producing cost of an enterprise can be saved.

The invention discloses an over-frequency vibrating separator and a separating system. The over-frequency vibrating separator comprises a casing, a membrane set and a motor. A central driving rod is extended from the membrane set and is equipped with an eccentric block and first flange at a lower end thereof; an output terminal of the motor is provided with a second flange which is flexibly connected with the first flange through a belt. Thereby, the motor drives the eccentric block on the central driving rod to conduct eccentric exercise in order to initiate swing, and energy generated from swing promotes vibration of the membrane set through the central driving rod; when a rotating speed of the motor reaches a frequency required by a resonance environment, the vibrating amplitude of themembrane set reaches the maximum, and the shearing force generated by the membrane set transmits in a sine mode through diaphragm surfaces in the membrane set, so as to effectively solve a problem ofdiaphragm stagnation in the membrane set. The over-frequency vibrating separator, a charge pump, a charging cylinder and a filtering hydraulic cylinder form a separating system in order to separate afiltrate continuously and effectively and realize a higher sewage recovery utilization rate; meanwhile, a lot of energy can be saved to bring good economic and social benefits for an enterprise.

The invention provides a method for treating desulfurization wastewater in a power plant. The method comprises the following steps: pretreating the desulfurization wastewater to obtain primary clarified liquor; enabling the primary clarified liquor to enter a filtering device to be filtered; providing a four-compartment electrodialyzer to perform ion recombination on ions in each water flow channel unit through an electric drive effect; further enabling produced water of each water flow channel unit to pass through a nanofiltration system to perform salt separation treatment, concentrating by utilizing an electrodialysis system, and desalinating the wastewater by utilizing a reverse osmosis system. According to the method disclosed by the invention, salts in the wastewater which are easy to scale are subjected to ion recombination so as to form soluble salts which are difficult to scale, so that the problem of scale formation in subsequent electrodialysis equipment or a high-pressure reverse osmosis system is solved. Moreover, according to the nanofiltration system for concentration, the electrodialysis system or the high-pressure reverse osmosis system, the content of total soluble solids in the wastewater is 8-16%, and the recovery rate of 80-90% of the wastewater is realized.

The invention discloses a recycling system and method of electroplating pretreatment sewage. The system comprises an electroplating pretreatment device, a collecting pool, a vibration membrane ultrafiltration device and a moderate pool, wherein the vibration membrane ultrafiltration device comprises a casing and a membrane unit and a motor which are installed in the casing; and the membrane unit is provided with a center transmission rod which downwardly stretches, thus an eccentric block on the center transmission rod is driven by the motor through a belt to rotate, so that a generated centrifugal force can trigger swing, and energy generated by swing promotes the membrane unit to vibrate through the center transmission rod, thus the silting problem of a membrane in the membrane unit is effectively solved, the capacity of resisting membrane pollution is stronger, sewage is simply and effectively treated, and treatment effect is better; the electroplating pretreatment device, the collecting pool and the moderate pool are coordinated and utilized to constitute a sewage recycling system so as to persistently and effectively separate out a clear liquid and a concentrated liquid; and the clear liquid is input into the moderate pool, subjected to oil removal and then recycled to the electroplating pretreatment device, thereby reducing water use amount and oil-removing powder use amount and achieving the purpose of reducing emission and reducing wastes.

The invention relates to the field of environmental protection, and specifically relates to a method for purifying salty waste water in a waste incineration fly ash process; the method uses a combination of scale inhibitors and ultrasonic anti-scale technology to solve the problem of evaporator scaling, and uses carbon dioxide to replace sodium carbonate and adjust pH , liquid caustic soda use and other plans to cooperate with the decanter centrifuge transformation to make appropriate adjustments to the existing water treatment system to ensure that the water quality of the distillation unit is in a controllable state. Not only that, the invention adopts two-stage distillation operation, adjusts the size of evaporator and crystallizer, and solves the problems of large evaporator, small crystallizer, easy scaling and high failure rate in the existing evaporation and crystallization system. The design of the invention has sufficient elastic margin and good system adjustability, which ensures continuous and stable operation of the equipment under the condition of fluctuating feed concentration and feed amount. The brine-containing purification process of the present invention has the characteristics of controllability, adjustment and easy operation.

The invention discloses a multi-layer column leaching device for soil pollutant leaching. The multi-layer column leaching device for soil pollutant leaching comprises a liquid distributing unit, leaching units and a collecting unit, wherein the liquid distributing unit is used for distributing leaching liquid; each leaching unit is used for extracting pollutants; the collecting unit is used for collecting leaching liquid; the liquid distributing unit, the leaching unit and the collecting unit are connected sequentially and detachably; the leaching liquid sequentially flows through the liquid distributing unit, the leaching unit and the collecting unit. The plurality of leaching units are connected in series and assembled, so that the utilization rate of the leaching liquid is increased, the pollutant concentration of each unit of leaching liquid is greatly increased and the subsequent processes of enriching and separating the pollutants are reduced.

The invention belongs to the technical field of evaporator and discloses a sodium sulfate solution circulating fluidized bed evaporation device and an operation method thereof. A heating pipe is vertical and the lower end of the pipe is inlet and the upper end of the pipe is outlet; the outlet of the heating pipe is connected with the inlet of an evaporation chamber through a first connection pipe, the upper outlet of the evaporation chamber is connected with a condenser, the lower outlet of the evaporation chamber is connected with the inlet of a circulation pipe, the outlet of the circulation pipe is connected with the inlet of a circulation pump, and the outlet of the circulation pump is connected with the inlet of the heating pipe through a second connection pipe. An electromagnetic flowmeter is mounted on the circulation pipe and connected with a high-level groove and an on-line particle feeding device, and an on-line particle collecting device is connected with the first connection pipe; the on-line particle feeding device and the on-line particle collecting device are respectively used for adding and collecting silicon carbide particles. The invention combines the fluidizedbed heat exchange scale prevention and energy saving technology with the evaporation process of the sodium sulfate solution, the operation is simple, and the heat transfer and scale prevention performance in the evaporation process of the sodium sulfate solution are effectively improved.

The invention discloses a heat exchange system and method for continuous wastewater treatment in a biosafety laboratory, and belongs to the technical field of wastewater treatment. The heat exchange system comprises a first double-layer sleeve heat exchanger located at a waste water inlet and a first valve located at a soft water injection opening, a double-layer sleeve on the first double-layer sleeve heat exchanger is divided into an inner pipeline and an outer pipeline, and the inner pipeline of the first double-layer sleeve heat exchanger is fixedly connected with an inlet pipeline of a heating device through a stainless steel pipeline. An outlet pipeline of the heating device is fixedly connected with a heat preservation coil pipe through a stainless steel pipeline. According to the heat exchange system, the electric heating device is arranged to preheat soft water, waste water in the initial starting stage of the continuous waste water treatment system can be preheated and then secondarily heated to the inactivation temperature through the heating device, stepped heating is achieved, and the problems that the temperature in the initial heating stage of the waste water is difficult to rise and the power of the heating device is too large are solved; and the problem of scaling caused by overlarge temperature difference of the pipeline is avoided.