5050results about How to "Guaranteed temperature" patented technology

Provided is a method for heating coal seam and extracting coal seam gas. Firstly, a plurality of vertical wells are drilled from the ground to the coal seam, after the drilled well reached to the coal seam, the coal seam is inserted with a screen tube casing (4), the section above the coal seam is inserted with a heat insulation casing (31) and the well is correspondingly fixed. At least one well of the wells is selected to be a heat source injection well (1) and other wells are gas production wells (2), steam with high temperature and high pressure is injected into the heat source injection well (1) to perform fracturing to communicate all the wells in the network. Drainage and pressure reduction are performed to the gas production wells (2) to extract the mixed gas of the coal seam gas and steam. The mixed gas of the coal seam gas and steam is cooled by known cooling method so as to obtain gaseous coal seam gas and liquid distilled water to realize the separation of the mixed gas. According to the change of the coal seam temperature, the heat source injection well (1) and the gas production wells (2) are allocated to control the heated coal seam and extract coal seam gas. The method of he invention can effectively perform the extraction of the coal seam gas, accelerate the coal seam extraction speed, and improve the extraction rate.

The invention relates to a hydraulic cylinder surface shot blasting, paint spraying and drying system and a shot blasting, paint spraying and drying process thereof, and the hydraulic cylinder surface shot blasting, paint spraying and drying system consists of a hanging chain conveying system, a shot blasting working position, a paint spraying working position, a drying working position, an overhauling working position, an unloading working position, a loading working position, a paint mixing room, an air compressor and an operating room. The shot blasting, paint spraying and drying process comprises the following process steps: loading of a piece, shot blasting, derusting and cleaning (10-15min), automatic paint spraying (3-5min), paint refinishing, leveling (5min), drying at 60-80 DEG C (30min), natural cooling and unloading of the piece. The hydraulic cylinder surface shot blasting, paint spraying and drying system has the advantages of high degree of mechanical and electrical automation, small occupied area, good safety performance, and high production efficiency, is not affected by weather and can ensure the cleanliness, the temperature, the illumination and the safety and sanitation standard required by the paint spraying environment; and the shot blasting, paint spraying and drying process is simple, safe, time-saving, environment-friendly and high in working efficiency and can obtain the good appearance quality of a paint film.

The invention belongs to the field of waste disposal in petroleum industry, and relates to an industrialization scale pyrolysis treatment system for oily sludge. The industrialization scale pyrolysis treatment system comprises a feeding pre-separation unit for performing secondary screening and solid-liquid separation on the oily sludge, a drying pyrolysis unit for performing drying and pyrolysis reaction on the oily sludge, a dust removal and condensation unit for performing dust removal and condensation on a pyrolysis gas mixture generated by the drying pyrolysis unit, and a discharge treatment unit which receives and treats separated substances of the other units respectively. Solid or solid-liquid mixed waste such as the oily sludge can be finally treated to achieve reduction, stabilization, harmlessness and recycling.

The invention provides a novel CO sulfur-tolerant shift technique which at least comprises a CO sulfur-tolerant shift production procedure composed of an adiabatic shift section and an isothermal shift section. Compared with the traditional adiabatic shift technique, the technique can simplify the shift process, reduce the equipment investment, lower the system resistance and reduce the one-time use amount of the catalyst. Compared with the direct isothermal shift technique, the isothermal reactor is arranged after the adiabatic reactor, the reaction heat generated by the primary adiabatic shift can ensure the inlet temperature of the isothermal shift reactor and avoid the problem of difficulty in self balancing of heat quantity in the direct isothermal shift technique, and thus, the technique can reasonably utilize the energy, avoid the problem of blockage since dust and other impurities in the raw gas enter the isothermal reactor, and ensure the long-period stable operation of the complete device.

The present invention provides a resistive heating evaporation source, which comprises a crucible (11) containing evaporation material (P) and provided with a crucible evaporation port (11A), a heating unit surrounding the periphery of the crucible (11), And the source outer wall (14) surrounding the heating unit and the bottom of the evaporation source (16); the heating unit is located on the periphery of the crucible evaporation port (11A), which is used to ensure that the temperature of the crucible evaporation port (11A) is higher than that of the evaporation material ( P) The upper heating unit (12A) with freezing point and independent temperature control, and the lower heating unit (12) located at the periphery of the main part of the crucible (11) with independent temperature control. Since the device is provided with an independent upper heating unit (12A) near the crucible evaporation port (11A), condensation of evaporated materials at the crucible port can be prevented. At the same time, due to the adoption of segmented and independent heating methods, defects caused by material splashing to the substrate caused by local uneven heating are prevented.

The present invention discloses a dynamic secondary cooling control method for slab continuous casting based on a double-cooling mode, which comprises the following steps of: collecting casting process data and indexing target cooling temperatures and ABC parameters of each cooling area; dynamically calculating the heat conduction process of a continuously cast slab in the current period according to a heat conduction equation; calculating the temperature tracking error of each cooling area and calculating the water amount of each cooling area in a second cooling mode by taking the temperature tracking error as a regulation factor; respectively calculating the water amount of each cooling area in a first cooling mode based on the ABC parameters and the current casting speed; determining whether the temperature tracking error exceeds a preset threshold and comparing the water amounts in the two modes to determine the cooling mode and the controlled water amount in the current period; and validating the reasonableness of the controlled water amount, and correcting the controlled water amount to be a preset maximum water amount or minimum water amount if the controlled water amount exceeds the preset maximum water amount or minimum water amount. The invention guarantees the quality stability of the cast blank in secondary cooling process.

The invention discloses a novel cigarette heater provided with an aerogel heat-insulating layer. The novel cigarette heater comprises a shell 1, a heating element 3, a heating chamber 4 formed by the heating element 3, and a heat-insulating layer 2 positioned between the heating element 3 and the shell 1. The novel cigarette heater is characterized in that the heat-insulating material of the heat-insulating layer 2 is aerogel; the heat-insulating layer 2 is partitioned into an inner layer 2-1 and an outer layer 2-2; the inner layer 2-1 is in direct contact with the heating element 3; the outer layer 2-2 is positioned between the inner layer 2-1 and the shell 1; the aerogel porous structure of the outer layer 2-2 of the heat-insulating layer 2 is filled and / or adsorbed with a phase change material. The aim of protecting a user is fulfilled in the presence of the heat-insulating layer; moreover, the heat loss of the heating element can be reduced, and the heat energy utilization ratio is increased.

The invention relates to an air incorporation measurement system used for vehicle exhaust-gas disposal. The system is characterized in that the measurement system comprises a measurement supply unit, a measurement drive part, an air solenoid valve, a spillover valve, a urea tank, a pressure accumulation cavity temperature sensor, a mixing cavity pressure sensor, a DCU control part, and a catalyst, etc. The measurement supply unit is connected with the catalyst, the air solenoid valve is connected with a quick coupling, an outlet quick coupling is connected with a nozzle by a pipeline, urea solution in the urea tank is conveyed to the measurement supply unit by a membrane pump, a reflux inlet is connected with the spillover valve by the quick coupling, the reflux flows to the urea tank, a compressed air inlet is connected with a compressed air source, and a mixing outlet sprays gas-liquid mixture into an exhaust duct through the nozzle by means of being connected with the pipeline. Themeasurement system of the invention features compact structure, small volume, light weight and accurate measurement, thus saving much space for vehicle layout while maintaining relatively high measuring accuracy and fog effect and ensuring reliability of normal operation in different areas and environments.

The invention discloses a functional PVC (polyvinyl chloride) paste. The functional PVC paste comprises the following components: PVC paste resin, PVC doped resin, a plasticizing agent, a filling agent, a heat stabilizer, a light stabilizer, an antioxidant, a mildew-proof antibacterial agent, a gas-phase silicon dioxide and the like. A preparation method of the functional PVC paste comprises the following steps of: (1) stirring: firstly mixing and stirring a part of the plasticizing agent and a liquid component uniformly, then adding a solid component, stirring uniformly, finally adding coloring stock and the remaining plasticizing agent, and stirring uniformly, so as to obtain plasticized paste; (2) grinding: grinding the plasticized paste on a three-roll grinding machine; and (3) defoaming and ageing. The paste has the advantages that the viscosity stability is good; and the paste can remain low viscosity under the action of the shearing force of a scraper in the process of producing PVC coated fabric, so that the normal production of the PVC coated fabric is guaranteed, and the surface of the prepared PVC coated fabric is smooth without the phenomena of pin holes and the like.

The invention discloses a multi-fluorescence immunity analysis method for quickly distinguishing PEDV, TGEV and PoRV. The method is easy to operate, a target amplified fragment is obtained through PCR, then hybridization is conducted on an amplified product, fluorescence coded microspheres and streptavidin-phycoerythrin, the MFi value is read through a detection instrument, and different types of viruses are distinguished. By means of the method, porcine epizootic diarrhea, swine transmissible gastroenteritis and pig group A rotavirus can be accurately detected at the same time, the specificity is high, the sensitivity is high, and the repeatability is good. Compared with a traditional detection method, various molecules of different purposes in the same sample are detected at the same time, the sample consumption is little, operation is simple and fast, and the detection cost can be greatly lowered.

The invention provides a cooling fan control device, which comprises an engine coolant temperature probe, a torque converter oil temperature sensor, a hydraulic oil temperature sensor, an electric control unit, a forced cooling switching input, a flow regulator, a driving device and a fan. A monitoring sensor and a setting amount signal input are connected with the input end of the electric control unit. The output port of the electric control unit is connected with the flow regulator. The flow regulator is connected with the driving device. The driving device is connected with the fan. The invention provides a control algorithm of the device. According to the method, relevant system signal or other incoming signal is collected and processed; the control signal is output and acts on the flow regulator; the driving power output to the driving device is regulated through changing the duty ratio of the output pulse-width signal, thus regulating the rotation speed of the fan. The system is effectively ensured to work within the optimal temperature range all along; the service life of the system or components is improved; energy consumption is reduced; work efficiency is improved; and noise resulting from the fan is reduced.

The invention discloses an air conditioner and fan linkage system and a control method. The air conditioner and fan linkage system comprises a fan and an air conditioner. An outdoor temperature sensor, an indoor temperature sensor and an air conditioner controller are arranged on the air conditioner. A fan controller is arranged on the fan. The signal output ends of the outdoor temperature sensor and the indoor temperature sensor are connected with the signal input end of the air conditioner controller. The air conditioner controller is connected with the fan controller. The fan and the air conditioner are separately installed. The startup and the shutdown of the fan are controlled through the air conditioner. The air conditioner can dynamically detect indoor temperature and outdoor temperature and can start up or shut down the fan according to difference between the indoor temperature and the outdoor temperature and the set indoor target temperature. The air conditioner additionally can set and control functions of the fan such as ventilation, startup and shutdown at a fixed period, can fully utilize outdoor cold and heat sources to decrease or increase the indoor temperature and can improve freshness and comfort of indoor air. Therefore, the air conditioner and fan linkage system has the advantages of energy saving, environmental friendliness, high economy and high practicability.

The invention provides a non-intermittent phase-change heat storage defrosting system, which relates to an energy storage defrosting system. The defrosting system aims at solving the problems that an air source hot pump defrosting method has the poor stability and reliability of machine units and the rooms become less comfortable after heat supply is stopped. The defrosting system of the invention is characterized in that an indoor machine is connected with a first pipeline and a second pipeline; an outdoor machine is connected with a second pipeline and a third pipeline; the third pipeline is respectively connected with the indoor pipeline and the outdoor pipeline; a fourth pipeline and a fifth pipeline are respectively connected with the fist pipeline and the third pipeline; a compressor is connected with a gas-liquid separator; a four-way directional valve is respectively connected with the first and the fifth pipelines, the gas-liquid separator and the compressor; the phase-change heat storage device is connected with the fifth and the fourth pipelines through a sixth pipeline and a seventh pipeline; an eighth pipeline is respectively connected with the fifth and seventh pipelines; a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve are respectively arranged on the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the first pipeline; a capillary pipe is arranged on the fourth pipeline. The defrosting system of the invention has good stability and reliability, high defrosting speed, and high comfort level of the room after the heat supply is stopped.

The invention discloses a glaze and preparation of an embossment phantom glazed brick. The glaze comprises a ground glaze, a surface glaze and an embossment phantom printing glaze, wherein the ground glaze is prepared from a frit b, zirconium silicate, kaolin, calcined kaolin, potassium feldspar powder, fired talc, aluminum oxide powder, quartz powder, carboxymethyl cellulose, sodium tripolyphosphate and water; the surface glaze is prepared from a frit, the frit b, a frit c, kaolin, carboxymethyl cellulose, sodium tripolyphosphate and water; the embossment phantom printing glaze is prepared from parent glaze powder, zinc oxide, tin oxide, cerium oxide and ceramic adhesive roll-printing oil; the parent glaze powder is prepared from the frit c, kaolin, carboxymethyl cellulose, sodium tripolyphosphate and water. The preparation method comprises the following steps: sequentially applying the ground glaze and the surface glaze on a green brick, then printing the embossment phantom printing glaze, performing inkjet printing, and finally firing to obtain the embossment phantom glazed brick. The product disclosed by the invention has unique decorative effect and visual aesthetic feeling; moreover, each indicator can reach the standard requirements, so that the product has relatively strong universality, and is easily popularized in the industry.

The invention aims to provide a long-term efficient passive containment cooling system utilizing a jetting technique. A built-in heat exchanger of a containment and upper and lower pipe sections form a first-stage heat discharging system; an air cooler, a water tank baffle plate and a steam-air jet device in an external water tank form a second-stage heat discharging system of a cooling system; the steam-air jet device is located on the side wall surface of a gas space in the water tank and is used for introducing water steam produced by virtue of the first-stage heat discharging system into an ejector to jet air of the second-stage heat discharging system, so as to decrease the inlet temperature of the first-stage heat discharging system, so that the heat discharging efficiency of the system is improved; and a passive containment heat exchanger adopts an intensified heat exchange pipe and is located in the containment, the heat exchange pipe adopts a small-coil-pipe light pipe, and drainage plates are mounted on the periphery of the heat exchanger. According to the long-term efficient passive containment cooling system, when a crevasse accident occurs at a main cooling agent loop or a main steam pipeline, the internal heat in the containment can be efficiently taken away in a long term, so that the internal temperature and pressure of the containment can be below safety limit values for a long time under accident conditions.

The invention relates to a residence community domestic sewage treating system. The system comprises a black water collection system, an anaerobic acidification reaction tank, an anaerobic gasification reaction tank and an aerobic contact oxidation tank, the black water collection system is communicated with the lower portion of the anaerobic acidification reaction tank through a black water inlet pipe, an outlet of the anaerobic acidification reaction tank is communicated with an inlet of the anaerobic gasification reaction tank, an outlet of the anaerobic gasification reaction tank is communicated with an inlet of the aerobic contact oxidation tank, a brown water collection system is communicated at a position of the inlet of the aerobic contact oxidation tank, the outlet of the aerobiccontact oxidation tank is communicated with an aerobic filter tower, a grey water collection system is arranged at a position of an inlet of the aerobic filter tower, a methane collection tank is communicated with the top of the anaerobic acidification reaction tank and the anaerobic gasification reaction tank, the methane collection tank is connected with a gas-fired boiler, the gas-fired boileris connected into the anaerobic gasification reaction tank through a pipeline, and the inlet of the anaerobic gasification reaction tank is connected with an alkaline liquor adding system through thepipeline. The residence community domestic sewage treating system and a method have the advantages that the system is simple, the sewage treatment effect is good, the construction costs are low, and the land occupation is small.

The invention discloses an air supply method, an air supply device and an air supply system of an air conditioner. The air supply method comprises the following steps: the temperature in geographical space where the air conditioner is located is detected; a temperature interval to which the temperature belongs is judged, wherein the temperature interval is at least one of preset temperature intervals, and each temperature interval part in at least one temperature interval corresponds to an air supply mode of the air conditioner correspondingly; and according to a judgment result, the air supply mode of the air conditioner is controlled, wherein the air supply mode comprises at least one of a breezeless air supply mode and a conventional air supply mode. The technical problem that the air supply mode and a temperature threshold of the conventional air conditioner can not be set according to user requirements is solved.

The invention provides a method for directly feeding primary network returned water in the steam condenser as condensed water and a method for reducing the water outlet temperature of the condensed water of a steam condenser step by step, increasing the water supply temperature of a primary network step by step and improving the power generation efficiency and the heat supply effect. The method comprises a thermal power plant steam extraction heat supply system, a returned water temperature adjusting system, a thermal power plant steam condenser cooling water system and a high-temperature-difference heat supply primary pipe network.

The invention belongs to the technical field of tobacco manufacturing and particularly relates to a microwave tobacco stem expansion technology. The method comprises the following steps of preparation of raw materials, quantitative feeding, temperature raising of tobacco stems, microwave expansion, microwave dehumidification, cooling shaping and production of cut stems. The method has the advantages that the production cost is low, the structure is stable, the cut stems do not retract when absorbing water and can be directly produced without ageing treatment, the seamless joining between specialized, large-scaled and continuous processing of microwave expansion tobacco stems and production of cut tobacco is realized, the cycle of producing, storing and preparing cut tobacco is unnecessary, the logistics and warehousing cost during the ageing period of expanded tobacco stems is unnecessary, and the economic benefits are quite obvious.

The invention discloses a method for multi-point sensing and intelligent controlling of the temperature of a gas heating furnace. The method comprises the following steps: firstly, temperature sensors evenly distributed in a natural gas heating furnace detects the temperature of each point in the heating furnace in a synchronous, real-time and continuous manner; then, an input interface and a data acquisition card transmit the detected temperature signals to an industrial control computer; the industrial control computer calculates, analyzes, and stores the temperature difference between each point and the change rate of the temperature differences through a system control software on a real-time basis, and calculates the integrated temperature in the heating furnace on a real-time basis; finally, whether the temperature of the furnace reaches the set value is judged, and treatment is carried out according to three conditions including reaching the set value, falling short of the set value, and approaching the set value, respectively. The invention can synchronously sense multi-point temperatures in a natural gas heating furnace, display furnace temperature change curves and temperature differences among areas on a real-time basis, and store the temperature change curves of each area in a database on a continuous and real-time basis. The invention adopts a fuzzy-neural network method to adjust each area temperature intelligently, thereby improving the quality of heavy forgings.

The package has a base body (51) with a mounting portion for mounting a light-emitting unit. A frame body is joined to an outer edge of the body (51) to surround the portion. A wiring conductor has its one end formed on an upper surface of the base body, to electrically connect an electrode of the light emitting unit. The light transmitting unit (53) is inside the frame body to cover the light emitting unit. - Independent claims are also included for the following: - (A) a light-emitting apparatus comprising a package for housing a light emitting unit - (B) an illumination apparatus constructed by setting up a light-emitting apparatus in a predetermined arrangement.

The invention discloses a method and the die for preparation of a hot forging ring billet of the guard ring of generator, and relates to a forging technique and the device of guard ring part of generator. The prior hot forging technique is flat-die forging, easily to produce crack in the process. The invention using confined shaping in die instead of flat-die forging, it improves the state of stress and prevents the crack effectively. With the symmetry of sphere plunger axis in the process of fan boring, the crystal particles are fine and uniform, which provides a perfect condition for cold strain intensification. With the jacket shaping of billet, it can improve lubrication and decrease friction, and can keep the temperature of the hot billet effectively, improving the plasticity and decreasing the shaping pressure. The invention solves the three problems that the crack is easy to produce, the structure property is not uniform, and the shaping pressure is large; compared with the prior technique, the invention has a projecting progress and a distinctive effect.

The invention relates to an extra-large fiber reinforced plastic (FRP) combined storage tank structure with a floating roof, and a construction method of the storage tank structure. The extra-large FRP combined storage tank structure comprises a tank top, a tank wall and a tank bottom, wherein the tank top has an FRP latticed shell structure; FRP plates are laid on the FRP latticed shell structure; the tank wall is composed of an inner layer FRP plate, an outer layer FRP plate and active powder concrete between the inner layer FRP plate and the outer layer FRP plate; the floating roof is arranged in the tank cover; a connection piece is arranged between the inner layer FRP plate and the outer layer FRP plate; concrete trapezoid grooves are sequentially formed between the inner layer FRP plate and the outer layer FRP plate along a circumferential direction; prestress bars are pulled between every two adjacent concrete trapezoid grooves section by section; and the inner layer FRP plate and the outer layer FRP plate are formed by connecting FRP spliced plates through tenon tongues and tenon grooves. The extra-large FRP combined storage tank structure is high in corrosion resistance and freezing resistance, insensitive to temperature change, low in heat transmission speed, favorable for keeping temperature in a tank body, high in compression strength, high in corrosion resistance and relatively high anti-permeability.

The invention provides a method and system for controlling heating of an air conditioner. The method for controlling heating of the air conditioner comprises the following steps that a compressor is controlled to conduct preheating before a preset time according to a set time; the temperature of an indoor coiler is detected; whether the temperature of the indoor coiler is higher than or equal to a preset temperature of the indoor coiler is judged; if yes, an indoor draught fan is controlled to operate at the lowest rotating speed; if not, the indoor draught fan is controlled not to operate. According to the method and system for controlling heating of the air conditioner, preheating is conducted before the preset time, the situation that clod air is directly blown to people can be avoided, the use comfort of users is improved, energy is saved relatively, and energy consumption is reduced; it is guaranteed that hot air is directly blown out by the air conditioner in heating operation when it reaches the set time, cold air is prevented from being blow out directly, user complaints are reduced, and the product competitiveness is improved for companies.

The invention discloses a non-woven fabric dying production line which comprises an uncoiling device, a dying cylinder, a cleaning cylinder, dry-rolling device, a drying device, a coiling device, a plurality of guide rollers, net belts and a first frame body. The uncoiling device, the dying cylinder, the cleaning cylinder and the dry-rolling device are arranged on the first frame body in sequence. The coiling device is arranged in rear of the drying device, and the dying cylinder, the cleaning cylinder and the first frame body are provided with the guide rollers. The net belts are arranged on the guide rollers in a tensioning mode. Compared with the prior art, the good cleaning effect can be achieved, the dying quality of a product is not affected, the size of an exhaust opening can be adjusted, the normal temperature in drying non-woven fabric in a drying oven and the coherence of the whole production process are guaranteed, production efficiency is not affected, crimples are avoided, the overall attractiveness and the coiling quality of the non-woven fabric are ensured, slippage in transmission can also be avoided, the transmission rate is guaranteed, the uncoiling speed can be prevented from being higher than the belt supporting speed of the net belts, water removing is even, the normal water removing effect is achieved, and the drying effect is not affected.

The invention discloses a temperature-controlled concrete stirring device comprising a stirring barrel body, wherein two sides of a first driving gear are meshed with second driven gears; the second driven gears are fixedly arranged on driven shafts; a plurality of temperature probes are arranged inside the left side wall of the stirring barrel body; a ceramic heating body is arranged inside a cavity; the bottom of the right side wall of the stirring barrel body is provided with a first discharging pipe; a second discharging pipe is connected with an auxiliary unloading hose; the top of the stirring barrel body is also provided with an additive introducing device; and a pipeline of a liquid control switch and an additive delivery pump is provided with a horizontal section pipeline, a first elbow pipeline, a second elbow pipeline and a third elbow pipeline. By using the temperature-controlled concrete stirring device, the temperature of inside concrete can be controlled, the automatic and quantitative addition of water is realized, the problem of deviation caused by different heights is overcome, and the retention phenomenon cannot be generated after the additive delivery pump stops working.

The invention discloses a subminiature minimal invasion high-temperature creep fatigue testing machine and the application thereof. The subminiature minimal invasion high-temperature creep fatigue testing machine mainly includes a driving system, a loading device, a constant temperature atmosphere furnace, a temperature control system, a high temperature gas protection system, a measurement control system and a water cooling system, wherein the loading manner of the machine is top vertical loading; a testing sample is positioned between an upper fixing platform and a lower fixing platform; and when loading is performed, a servo motor controls a lower loading rod to move upwards, a jumper bar is contacted with an upper loading rod, the lower end of the jumper bar is used for testing sample stamping through a pressure head. Aiming at an existing structure and a domain structure at a high temperature, the testing machine provided by the invention can be used for obtaining various high temperature performance of the material and estimating residual service life creep, safety operation state and the like of the high temperature structure, is convenient to operate, is uniform in testing temperature and high in testing precision, can be used for testing various high temperature performances such as high-temperature creep performance, high-temperature relaxation performance, high-temperature creep fatigue performance and high-temperature breaking toughness of the material.

The invention aims to provide a district air-conditioner distributed secondary pump system, which comprises refrigeration main engines 1, chilled water primary pumps 2, a water segregator 3, a water collector 4, and a profit and loss tube 5. According to the invention, in the two forms of an indirect connection 1 and an indirect connection 2, a chilled water secondary pumps 6, plate heat exchangers 7, user chilled water circulating pumps 8, and user tail end air processing devices 9 are mainly arranged on a user side; in the direct connection form, the chilled water secondary pumps 6, the user tail end air processing devices 9, and a bypass pipe 10 of a secondary pump suction inlet with a control valve are mainly arranged in the user side. The invention also provides a connecting form of distributively arranging the secondary pumps to a chilled water distribution system of each user building, and a corresponding operation control method. The system can well realize the hydraulic equilibrium of each paralleled loop circuit of a district cooling system transmission and distribution network, improves the operation efficiency of the secondary pumps, and greatly reduces the water pump energy consumption, thereby improving the energy efficiency ratio of the overall system, and increasing the safety of the overall district cooling system.

The invention provides a hot in-place recycling ultrathin overlaying machine of a bituminous pavement and a construction method thereof. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement comprises an automobile chassis, an integral power device, an electric control system, a diesel tank, a receiving and transporting device, a material transfer hopper, a horizontal transporting device, a heating device, a hydraulic system, a recycling agent spraying system, a harrowing device, a distributing spiral device, a paving screed device, a cab, and an electric control operating floor, wherein the automobile chassis is a special automobile chassis. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement finishes the continuous overlay repair work of the pavement through a series of processes such as receiving the materials, feeding the materials quantitatively, transporting the materials horizontally, spraying the recycling agent, harrowing, heating, distributing and paving the materials, ironing, and grinding and the like, and has the advantage of carrying out one-time maintenance on the defects such as loose, shallow vertical and horizontal cracks, track, slight crack, bituminous aging, pavement seepage and the like of a functional layer of the pavement. By adopting the invention, the antiskid resistance of the pavement is restored, the profile of the pavement is corrected, the appearance and the evenness of the pavement are improved, the pavement strength of the pavement is increased, the traffic noise is reduced, and the service life of the pavement is prolonged.