31results about How to "Improve the efficiency of waste heat recovery and utilization" patented technology

The invention discloses a system and method for power generating by jointly recovering the waste heat of a flue gas of a sintering machine and an exhaust gas of a cooling machine, belonging to the technical field of power generation by using waste sintering heat of a steel and iron plant. The power generating system comprises a sintering machine flue gas waste heat utilizing system, a cooling machine exhaust gas waste heat utilizing system, a turbine generating system and a relevant auxiliary system, wherein a main waste heat discharging boiler is utilized to recover the waste heat of the flue gas of a high-temperature segment of the tail part of the sintering machine; a cooling machine waste heat boiler is utilized to recover the waste heat of the high-temperature exhaust gas of the cooling machine; and a high-temperature electric butterfly valve is arranged between the high-temperature segment and a low-temperature segment of a large flue positioned on the tail part of the sintering machine to prevent the wind pickup temperature of the flue gas from being reduced because a low-temperature flue gas and a high-temperature flue gas are directly mixed so as to ensure the high-temperature flue gas to enter the main waste heat discharging boiler for waste heat recovery. The system and method effectively utilizes the waste heat resources of the high-temperature flue gas of the machine tail of the sintering machine and a hot gas of the high-temperature segment of the cooling machine, enhances the waste heat recovery and utilization efficiency of a sintering process and increases the power generation capacity of the waste heat power generating system.

The invention relates to a branch control phase inversion heat exchange system and a branch control phase inversion heat exchange method based on a vapor-liquid heat exchanger. The system comprises a liquid storage tank (20), a heat source heat exchanger (3), a cold source heat exchanger (15) and a vapor-liquid heat exchanger (9); an upper collection tank of the heat source heat exchanger (3) is communicated with the vapor-liquid heat exchanger (9) through a heat exchanger inlet steam pipe (8); a vapor-liquid heat exchanger outlet steam pipe (10) which is arranged on the vapor-liquid heat exchanger (9) is divided into two branches which are communicated with an upper collection tank and a lower collection tank of the cold source heat exchanger (15); the lower collection tank of the cold source heat exchanger (15) is communicated with the upper part of the liquid storage tank (20) through a cold source heat exchanger liquid outlet pipe (17); the bottom of the liquid storage tank (20) is communicated with the vapor-liquid heat exchanger (9) through a heat exchanger inlet condensation liquid pipe (11); and the vapor-liquid heat exchanger (9) is communicated with a lower collection tank of the heat source heat exchanger (3) through a heat exchanger outlet condensation liquid pipe (6). The branch control phase inversion heat exchange system can solve the phenomena of overcooling and overheating and improve heat exchanging efficiency.

The invention provides a low grade residual heat continuous recycle system for a kiln, which is used for recycling low grade residual heat of the kiln. The low grade residual heat continuous recycle system comprises a heat pipe exchanger, a draught fan, a first water pump, a second water pump, a third water pump, a heat storage water tank and a drying room; the heat pipe exchanger is internally provided with a smoke section and a hot water section, wherein the kiln is communicated with the smoke section and the draught fan of the heat pipe exchanger through a smoke pipeline in sequence, the hot water section of the heat pipe exchanger, the first water pump, the heat storage water tank and the third water pump are communicated end to end through a first hot water pipeline in sequence, and the drying room, the second water pump and the upper end of the heat storage water tank are communicated end to end through a second hot water pipeline in sequence. The low grade residual heat of the kiln can be continuously stably recycled, comprehensive use efficiency is higher, problems of blockage of a water pipe and scrapping of a whole system caused by water leakage of one part of a traditional shell-and-tube heat exchanger are avoided, and safety and reliability are realized.

The invention provides a cement kiln waste-heat utilization system and a method for directly driving rotating equipment by a turbine. The system and the method belong to the technical field of cement kiln waste-heat utilization. The waste-heat utilization system comprises a waste-heat recovery device, a high-temperature fan turbine drive device, a kiln tail exhaust fan turbine drive device, a cement grinding mill turbine drive device and a circulating cooling water device. According to the system and the method, superheated steam generated by the cement kiln waste heat is utilized to directly drive rotating equipment such as a high-temperature fan, a kiln tail exhaust fan and a cement grinding mill, the energy loss during the multistep energy transformation process from heat energy to electric energy to kinetic energy of waste heat power generation is avoided, and the cement kiln waste heat recovery and utilization efficiency is effectively improved.

The invention discloses an efficient water jacket heating furnace. The efficient water jacket heating furnace comprises a water jacket, a chimney, a heat exchanger, a medium coil pipe and a smoke pipe; a circulating liquid coil pipe is arranged in the chimney; a gas coil pipe is arranged in the heat exchanger; the medium coil pipe and the smoke pipe are arranged in the water jacket; a honeycomb pipe communicated with the chimney is arranged in the water jacket; the honeycomb pipe is connected with a fire cylinder through the smoke pipe; the fire cylinder is connected with a combustor; a liquid flowing cavity is formed in an inner cavity of the heat exchanger; the circulating liquid coil pipe is connected with the heat exchanger and enables liquid media in the circulating liquid coil pipe and the heat exchanger to flow and replace; the gas coil pipe is connected with a gas pipe of the combustor; an airflow channel is formed in a cavity of the chimney; and the chimney is connected with an air pipe of the combustor. The efficient water jacket heating furnace has the advantages that gas and air are mixed and burnt more thoroughly, and the utilization efficiency of the gas is improved; and air and fuel gas entering the combustor are preheated through flue gas waste heat, the flue gas waste heat recycling efficiency is effectively improved, and the heat efficiency of the water jacket heating furnace is improved.

The invention discloses a slag waste heat recycling device. The slag waste heat recycling device comprises a box body, and a conveying assembly and a waste heat utilizing assembly which are arranged in the box body. The conveying assembly is arranged in the box body, and the bottom of the conveying assembly communicates with a feed hopper. The discharge end of the conveying assembly is provided with a material guide pipe communicating with the waste heat utilizing assembly. The side, away from the feed hopper, of the box body is further provided with a discharging assembly, and the feeding endof the discharging assembly is located on the lower side of the discharging end of the waste heat utilizing assembly. The slag waste heat recycling device is filled with a thermal insulation materialand thermal insulation asbestos, the slag heat loss is reduced, the recycling efficiency is improved, and meanwhile the injuries caused by overflow heat to operators are avoided; a cylinder closely sleeves the periphery of a feeding spiral blade, so that slag is prevented from falling from a seam, and meanwhile a conveying motor is isolated and protected; by means of a reflux pipe with a water pump and a second water temperature sensor, the temperature of hot water is ensured; and by means of a slag temperature sensor, slag not meeting the temperature requirement is conveyed to a next link intime.

The invention discloses a device and method for granulating blast furnace slag and recycling waste heat. The device comprises an aerial fog granulation nozzle assembly, a fluid director (7), a cyclone separator (8) and a waste heat recoverer. The aerial fog granulation nozzle assembly comprises a slag flow controller (2), a compressed air flow control valve (3), a water quantity control valve (4) and an aerial fog spray gun (5). Mixing heat exchange of medium-temperature gas and high-temperature granular slag (6) and solidification of the high-temperature granular slag are realized in the fluid director, and the medium-high-temperature gas and the high-temperature granular slag after heat exchange are guided into the cyclone separator. The cyclone separator is used for separating medium-high-temperature gas and high-temperature granular slag and conveying the medium-high-temperature gas and the high-temperature granular slag into the waste heat recoverer. Complete granulation of the blast furnace slag is achieved, slag sensible heat recovery is organically coupled with sludge drying, high-temperature steam preparation, power generation and low-temperature hot water preparation, waste heat recovery of medium-temperature gas and high-temperature granulated slag in the slag granulation treatment process is achieved, and the waste heat recovery and utilization efficiency is improved.

The invention provides a vehicle-mounted compatibility test platform for an automobile exhaust thermoelectric power generation system and a test method thereof. The vehicle-mounted compatibility testplatform comprises a thermoelectric power generation and performance detection unit and a monitoring unit. The thermoelectric power generation and performance detection unit provides automobile exhaust with adjustable temperature, flow and pressure for the heat exchanger to construct the temperature difference of a thermoelectric device group; the monitoring unit collects signals of all sensors and the working state of an execution part, displays information with an upper computer, and sends an operation command to a main controller by operating an interface of the upper computer to control the operation state of the thermoelectric power generation and performance detection unit. Volt-ampere characteristics of the thermoelectric device group and oil consumption and emission performance ofthe engine under different conditions are tested, and performance evaluation of the heat exchanger structure, the thermoelectric device group electrical topological structure and the cooling effect onautomobile exhaust temperature difference power generation is carried out. The platform can be used for testing the temperature difference power generation performance of automobile exhaust temperature, back pressure, flow, cooling water temperature and cooling water flow, and guidance is provided for vehicle-mounted compatibility optimization of a system.

The invention relates to a boiler waste heat recovery system, method and equipment and a storage medium. The boiler waste heat recovery system comprises a smoke exhaust unit, and the smoke exhaust unit comprises a main flue and a bypass flue communicating with the main flue; the flue gas temperature detection unit is used for detecting the flue gas temperature in the main flue in real time; the flue gas conduction control unit comprises a controller and a conduction control piece, and the controller is in control connection with the conduction control piece and controls opening and closing of the main flue and the bypass flue; the flue gas recovery unit comprises a flue gas recovery pipeline, a heat recovery heat exchanger and a condensate water tank; the domestic water unit comprises a domestic water pipeline and a plate heat exchanger communicated with the domestic water pipeline, and the plate heat exchanger is connected with the water outlet end of the condensate water tank through a pipeline; the air conditioner water using unit comprises an air conditioner water using pipeline and a process heat exchanger communicated with the air conditioner water using pipeline, and the process heat exchanger is connected with the water outlet end of the condensate water tank through a pipeline. The flue gas waste heat recovery device has the effects of high flue gas waste heat recovery efficiency and high automation degree.

The invention discloses a power generating system and a power generating method by jointly recycling waste heat of glass melting kiln flue gas and annealing kiln waste gas and belongs to the technical field of waste recycling in the glass industry. The power generating system comprises a glass melting kiln flue gas treatment and waste heat utilization system, an annealing kiln waste gas waste heat utilization system, a steam turbine generating system and a related auxiliary system, wherein a waste heat boiler is utilized to recycle the glass melting kiln flue gas waste heat, and a water preheater is utilized to recycle the annealing kiln waste gas waste heat, so that a boiler feed-water temperature is increased to prevent corrosion of the tail part heated surface of the boiler; and meanwhile, a high-temperature electric dust collector is arranged to prevent a catalyst in a denitrification reactor from being poisoned and to prevent surface blockage. According to the power generating system, waste heat resources of the glass melting kiln flue gas and the annealing kiln waste gas are effectively utilized, so that the waste heat recycling efficiency of a glass production process is improved, and power generating capacity of a waste heat power generating system is increased.

The invention relates to a thermal power generation system and a thermal energy device and a flue gas waste heat utilization device thereof. The flue gas waste heat utilization device comprises a first economizer communicating with a waste gas port of a boiler, a second economizer communicating with the first economizer and an air heater communicating with an air preheater. The first economizer conducts heat exchange with flue gas through a condensation water loop, and part of waste heat in the flue gas can be used for working of a steam turbine. Furthermore, the second economizer is matched with the air heater, and part of 'low grade waste heat' cannot be utilized by the first economizer in the flue gas is transformed into 'high grade heat' through a heat exchange loop for heating air entering the air preheater, so that heat entering into the boiler is increased. Meanwhile, the part of waste heat raises the temperature of the boiler flue gas after entering into the boiler, so that the first economizer can use more waste heat to work on the steam turbine. Therefore, through the heat exchange loop, the heat in the flue gas can be recycled, and the efficiency of flue gas waste heat recovery and utilization is effectively improved.

The application relates to a slag split flow heat exchange device, which includes an airtight casing. A slag collection chamber is arranged inside the airtight casing. A heat exchange material bed for carrying and transporting slag is arranged in the slag collection chamber. There is an air distribution plate, the slag collection chamber includes a heat exchange chamber located above the air distribution plate, a shunt cavity is provided on the inside of the side wall of the airtight shell, and a heat storage structure for absorbing slag radiation heat is provided at the upper end of the air distribution plate. Structurally, there is a channel connecting the heat exchange chamber and the distribution chamber, and the lower end of the air distribution plate is provided with an air hole connecting the slag collection chamber and the distribution chamber. The slag shunt heat exchange device of the present application can divert the airflow before entering the air distribution plate area to avoid excessive wind speed in the air distribution plate area; the heat storage structure at the top of the air distribution plate can be used to absorb radiant heat during slag granulation , the cooling air flow passing through the distribution cavity carries this part of the heat into the heat exchange cavity, and the recovery and utilization efficiency of waste heat is high.