1207 results about "Heat consumption" patented technology

A behavior modification system includes a network of components that interact to collect various data and provide user feedback. The network may include a personal device, an Internet-enabled storage device and a hub capable of receiving communications from the personal device and communicating to the storage device. The personal device may include bio-impedance measurement circuitry, an accelerometer and a processor for determining energy expenditure based on data from the accelerometer(s). The system may include a smart hub capable of routing communications between various components within the system. The hub may include different transceivers for different communication protocols. The system may incorporate a low-power RF wake-up system. The system may include bio-impedance measurement circuitry that is reconfigurable to function as an alternative type of sensor. In other aspects, the present invention provides a method for measuring bio-resonance and a method for determining caloric intake from body composition and caloric expenditure.

The invention relates to a system and a method for saving energy and shaving the peak by coordinating a cogeneration set and a wind energy generator set. The system comprises the cogeneration set, the wind energy generator set, a conditioner heat pump, an electric energy meter, a radiator, a heat consumption gauge, and a scheduling control device, wherein the scheduling control device is used for acquiring fuel consumption, generated output and heating output of the cogeneration set, generated output of the wind energy generator set, electric power consumption of heating of the conditioner heat pump, a scheduling control signal of the heating load of the radiator in the electric load trough period according to detected electivity consumption data and heating and heat consumption data, and controlling the cogeneration set, the wind energy generator set, the conditioner heat pump, and the radiator to run according to the scheduling control signal. Through the system and the method, the distribution of the generated output of each of the cogeneration set and the wind energy generator set is optimized so as to reduce the total energy consumption, save energy and solve the problems of the forced shutdown and the waste of abandoning electricity of the wind energy generator set in the electric load trough period of the power grid.

The temperature control system includes heat elimination air flue including air inlet and air outlet, and reflow dual flue including first air inlet and first air outlet. The first air inlet and first air outlet of reflow dual flue are connected to the air outlet and air inlet of the heat elimination air flue. Heat elimination fan system is setup in the heat elimination air flue. Circulating fan system is setup in the reflow dual flue. Under environment in normal temperature, the invention does not need of using additional heating unit. Using heat consumption of equipment self, the invention carries out heating to reduce relative humidity in cabinet, inhibit corrosion, save energy, and guarantee reliable heat elimination for equipment.

The invention relates to a heat quantity apportionment measuring method and a device for central heating. In the method, aiming at a heating system of a switching-on / switching-off type heat supply control mode, the apportionment measurement of the heating heat consumption is carried out according to a switching-on / switching-off time area method, modification with the time is carried out on the opening time of a switching-on / switching-off valve according to an built-in special modification computation program by the real-time measurement of the water supply and return water temperature values of heating users, and accumulation is carried out to calculate a modified opening specific value; when the heating season is over, the final modified opening ratio and the heating area of each user are used for apportioning the total heat quantity to determine heating charge which needs to be charged by each user; and the special modification computation program is designed in such a way that under the opening state of the switching-on / switching-off control valve, the water supply temperature value and the return water temperature value are read, the modified opening ratio is calculated, so the apportionment of the heat quantity used by the users is calculated. The device is suitable for the heat quantity apportionment measuring method for central heating and comprises a room temperature controller, the switching-on / switching-off control valve, a water supply temperature sensor, a return water temperature sensor, a heat supply control / opening time modification integrating instrument and the special modification computation program.

The invention discloses an automatic dimming method and device of an infrared camera. The brightness of an LED (Light-Emitting Diode) lamp group is adjusted according to the brightness of the area of a moving target in a video picture, so that a sharp image of the most-concerned moving target is obtained. The brightness of an infrared lamp is adjusted by comparing the brightness of the area of the moving target with brightness of a background area as well as whether the moving target is over-exposed or over-dark, so that the brightness level of the infrared lamp can be accurately controlled, and the situation that the details of the moving target are vague caused by over-exposure or over-darkness of a future target is avoided. In the traffic field, only the judgment on whether to be over-exposed or over-dark is carried out on a license plate area instead of the judgment on the whole image, so that the brightness of the LED lamp group can be more accurately controlled to obtain useful details of a license plate. The invention has the advantages that photoelectric conversion of the LED lamp can be effectively controlled, the brightness of the LED lamp is intelligently controlled, the resolution ratio of the details of the moving target is effectively increased, the heat consumption of the infrared lamp is reduced and the service life of the whole device is prolonged.

A liquid crystal display apparatus which exhausts heat generated within the apparatus efficiently, and reduces temperature increase in the heat-frail sections is provided.A circuit board mounting surface at the back of the liquid crystal monitor unit is divided into a plurality of board mount areas using the vertically extending reinforcement members. A signal circuit board section and TCON (Timing control) circuit board section are disposed in the same board mount area which is different from the partition where the power supply circuit board section resides. By arranging this way, the temperature increase in the heat-frail sections of the signal circuit board section is reduced, and the hot air heated by the power supply circuit board in the power supply circuit board section goes up along the reinforcement members, thus an efficient heat exhaustion is achieved.

The invention provides an improved genetic algorithm-based method for distributing and optimizing thermal and electrical load of a steam extraction and heating unit, and belongs to the technical field of energy saving and monitoring of a power station. The invention aims to distribute and optimize the thermal and electrical load of a plurality of heating units of the power station, optimally distribute the electrical load and the thermal load of the power station when the electrical load and the thermal load meet requirements of users, and reduce total energy consumption and save energy. An actual heat consumption and consumption difference curve of the unit is set, and a design heat consumption curve of the unit is obtained; the electrical load and steam extraction amount of each unit are acquired; and the electrical load and the steam extraction amount value of each unit are obtained based on the improved genetic algorithm when the total thermal consumption values of the units are minimum, and the electrical load, the steam extraction amount value optimal solution and the corresponding minimum total thermal consumption of each unit are output when the total thermal consumption values of the units are minimum by improving genetic coding and fitness function, and selecting, crossing and mutating the genetic algorithm under the condition that the optimization process meets constraint conditions. By the method, the speed of optimization process and accuracy of an optimization result are improved.

Provided is a nozzle governing steam turbine flow characteristic test method. According to the method, the steam distribution end of a steam turbine is assumed as an equivalent nozzle, the forward pressure, backward pressure and pressure ratio of the equivalent nozzle are taken as variables to perform indirect numerical mapping (direct mapping when the intermediate conversion link 'flow ratio' is removed) on 'actual flow-flow ratio-regulating valve position instruction' of the steam turbine by two different mapping methods, namely, an 'indirect method' and a 'direct method', and regulating valve overlap is finely adjusted by double means of setting 'the regulating valve opening amplitude limit under inlet air flow increase per unit' and numerically quantizing 'the degree of influence of regulating valve throttling loss to the heat consumption of the steam turbine', thereby obtaining a steam distribution function conforming to the actual flow characteristic of the steam turbine and realizing precise control on the inlet air flow of the steam turbine under different valve control modes. The nozzle governing steam turbine flow characteristic test method of the invention is suitable for nozzle governing steam turbine flow characteristic setting and steam turbine steam distribution end operation mode integrated optimizing control research.

The supply-and-demand control apparatus (100) includes: an obtaining unit (201g) that obtains power consumption and heat consumption; a forecast processing unit (201h) that obtains demand forecast data on each of electric power and an amount of heat using the power consumption and heat consumption, respectively; a supply-and-demand planning unit (200) that calculates a control parameter (the fourth and fifth columns in FIG. 7) for controlling operations of an electricity storage system (102) and a heat pump (104) that supplies heat to a hot water storage tank (105), by substituting the calculated demand forecast data into a predetermined function; and a supply-and-demand control unit (204) that controls the operations using the control parameter, wherein the supply-and-demand planning unit (200) calculates the control parameter such that electric power generated by a solar power system (101) is distributed to the electricity storage system (102) and the heat pump (104).

A low heat loss and small contact area electrode structure for a phase change media memory device is disclosed. The memory device includes a composite electrode that includes a dielectric mandrel that is connected with a substrate and having a tapered shape that terminates at a vertex. An electrically conductive material conformally covers the dielectric mandrel and terminates at a tip. A first dielectric layer covers all of the composite electrode except an exposed portion of the composite electrode that is adjacent to the tip. A phase change media is in contact with the exposed portion. The exposed portion is only a small percentage of an overall surface area of the composite electrode so that a contact footprint between the exposed portion and the phase change media is small relative to a surface area of the phase change media and Joule heat transfer from the phase change media into the composite electrode is reduced.

The invention discloses a smoke waste heat utilization system, wherein two condensation heat exchangers are added between a desulfurizing tower and a CO2 catching system, so as to absorb smoke heat and lower exhaust smoke temperature; and the absorbed heat is used for condensation water heating and municipal heating respectively. Two smoke coolers are arranged between an electric precipitator and the desulfurizing tower, and the heat recovered from the smoke is used for boiler primary air heating and further condensation water heating respectively. An air heater is arranged between an air inlet and an air preheater, and the heat recovered from the smoke by the smoke coolers is used for boiler primary air heating. The smoke waste heat utilization system can facilitate energy conservation and efficiency improvement for a power plant, and is particularly important for a running power plant which is difficult to improve the back-heating efficiency through increasing a steam parameter. Through optimizing running parameters of a unit, increasing condensation water heating bypasses and raising the temperature of the boiler primary air entering the air preheater, the heat consumption of a whole heating device can be lowered, the pollutant emission is reduced, and the energy utilization is improved.

The invention discloses a performance index correcting and comparing method for a combined cycle generating unit. The performance index correcting and comparing method comprises the following steps: 1), calculating the integral power, heat consumption rate and gas consumption rate of the combined cycle generating unit under the current atmospheric environment and an operation mode according to measurement data in a real-time database; 2), acquiring measurement data relevant with a performance correction calculation factor and calculating the relevant performance index correction calculation factor; 3), correcting various performance indexes in the step 1 and obtaining a corrected and calculated performance index of a standard ISO (International Standard Organization) working condition; and 4), comparing performance index data of the standard ISO working condition with traditional corrected and calculated performance index data of the standard ISO working condition of the unit or other units and outputting a corresponding operation regulating control instruction by an operator according to the evaluation result. The invention further discloses a regulation control system based on the performance index correcting and comparing method of the combined cycle generating unit. According to the performance index correcting and comparing method provided by the invention, the unit operation can be optimized and the economy and the safety are improved.

The invention discloses an exhaust gas waste heat recovery and emission reduction comprehensive application system for a coal-fired boiler in a thermal power plant. In the invention, along the flow direction of flue gas, an air preheater, a first low temperature economizer, a low temperature dust collector, a draught fan, a second low temperature economizer and a desulfuration island are sequentially arranged on a pipe between the boiler and a chimney, wherein, the inlet of the air preheater is respectively communicated with a cold primary air pipe and a cold secondary air pipe; the cold secondary air pipe is provided with a secondary air heater; the secondary air heater is communicated with the second low temperature economizer via a coal-water pipe; the coal-water pipe is provided with an expansion tank and a water pump; and the low temperature economizer is divided into two segments, wherein, one segment is used for heating condensed water, and the other section is used for heating the cold secondary air at the inlet of the air preheater by virtue of a water medium. The exhaust gas waste heat recovery and emission reduction comprehensive application system has the beneficial effects of maximally utilizing the gas waste heat, reducing heat consumption of a machine set, lowering energy consumption of equipment such as the dust collector, the draught fan, a blower and the like, reducing the power consumption rate of the thermal power plant, improving the economical efficiency of the thermal power plant, more efficiently saving the energy consumption, and benefiting construction of the lowcarbon society.

The invention relates to a sensor-based device and a sensor-based method for recognizing motion of a mobile terminal. The method comprises the following steps of collecting at least two acceleration data and magnetic field data, and performing noise filtering on the acceleration data; determining a usage state according to the current running state of the mobile terminal; determining the motion type of the mobile terminal by utilizing a secondary classifier unit according to the magnetic field data and the at least two noise-filtered acceleration data; determining motion information by utilizing a heat consumption computing element according to the motion type and the usage state of the mobile terminal, and moreover, converting the motion information into corresponding calorie consumption; reducing power consumption when the motion of the mobile terminal is recognized by utilizing a power optimization unit according to the motion type and the usage state of the mobile terminal.

The invention relates to an anode for an arc plasma torch and a non-transferred arc plasma torch with the anode. The anode comprises a stable arc section and an anode nozzle section which have evenly varied diameters, a burble section which is connected with the two sections and is provided with a groove with increasing diameter, wherein an insulating material is filled in the burble section. The plasma torch comprises a swirler, a cathode, the anode and a cathode-anode isolation sleeve which are arranged coaxially. Working gas flows into the stable arc section by rotation of the swirler, and restricts arc in an axle center position stably; the burble section ensures that air flow generates high frequency turbulence to drive an arc stream to swing in high frequency randomly and constantly impacts the inlet side of the anode nozzle; and the anode arc root moves quickly under the action of high speed air flow. The non-transferred arc plasma torch can obviously improve the arc voltage, the jump frequency and the moving speed of the anode arc root, reduces heat consumption, has the characteristics of high power, low electrode loss rate, high heat conversion efficiency, wide operation parameter range, small arc voltage fluctuation and the like, and is particularly suitable for gas heating.

The invention discloses a combined technology of a catalytic cracking absorbing stabilizing system and C3 intercooling oil absorption, belonging to the technical field of integration of oil refining and ethylene, and providing a method for recovering dry gas by the combination of the absorbing stabilizing system and the C3 intercooling oil absorption. The method eliminates a desorption column of the absorbing stabilizing system, and avoids the constant circulation of a great amount of ethylene, ethane and liquefied gas in desorption gas between absorption and desorption, thus reducing the load of an absorption column and saving the energy consumption of the desorption column; as coarse C3 in a dethanizing column kettle of an ethylene unit is used as an absorbent, raw material is easy to obtain, and the cost is low; the desorption column of an original C3 oil absorption column for absorbing intercooling oil is eliminated, the constant circulation of a great amount of C2 and C3 in the desorption gas between absorption and desorption is avoided, and an expansion engine and an ice chest are adopted for recovering refrigeration capacity, thus saving consumption of the refrigeration capacity and heat capacity; and the regeneration of a C3 absorbing agent, the demethanation and the separation of the ethylene are all conducted in the ethylene unit, thus fully showing the reciprocity of the oil refining and ethylene, and being reasonable in flow.

The invention provides a method for online monitoring performance of a steam turbine of a coal-firing unit. The method includes the following steps: step 1, according to boiler operation designing procedures, acquiring boiler structure parameters, and reading real-time data of operation condition measuring points of a steam-water system and a heat exchanger system at a given moment from a real-time database of a DCS (distributed control system); step 2, calculating specific enthalpy and density of a working medium on the basis of a working medium physical parameter library; step 3, according to a working medium side energy balance model, respectively calculating heat absorbed by the working medium in the steam-water system and the heat exchanger system to acquire total energy increment of the working medium; step 4, building a transmission function model between the total energy increment of the working medium and output power of the unit, and acquiring efficiency and heat consumption rate of the steam turbine through parameter recognition. The method can be used for online monitoring operation conditions of the steam turbine and providing technical support for coordination and optimization of the unit.

The invention provides a heat and power cogeneration system intelligently monitoring heat consumption through a cloud server. The heat and power cogeneration system comprises a boiler system, a heat exchange station system, a heat dissipation system, the cloud server and multiple client sides. The client sides monitor the heat consumption conditions of the heat and power cogeneration system through the cloud server, so that the heat consumption conditions are mastered in real time. The heat consumption conditions are monitored through the cloud server, the flexibility is high, and maintenance is convenient.

The invention provides an acquisition method of a sliding pressure curve of a steam turbine by using a main steam flow as a scheduling variable, relates to a determining method of a sliding pressure curve, and aims at solving the problem that the heat supply steam extraction capacity variation and back pressure variation operation status cannot be fulfilled by one sliding pressure curve. The method comprises the following steps: selecting M main steam flows according to the type of a heat supply steam extraction unit, wherein M is an integer of greater than 2, and each main steam flow is respectively subjected to the following steps: N different main steam pressure values of the heat supply steam extraction machine are selected with the main steam flow being the selected main steam flow, and N is an integer of greater than 4; calculating heat consumption values of the heat supply steam extraction unit; performing curve fitting on the N main steam pressure values and corresponding heat consumption values thereof according to a least square method to determine an optimal main steam pressure value; and performing linear fitting on the acquired M main steam flows and the corresponding optimal main steam pressure data thereof to acquire a final sliding pressure operation curve. The acquisition method is used for determining the sliding pressure curve of the steam turbine.

The invention relates to a multistage division regenerative carbon dioxide trapping system. The system comprises an absorption tower, wherein rich liquor that flows out of the absorption tower is divided into two channels; a first pipeline is communicated with a rich liquor inlet formed in the upper part of a regeneration tower; a second pipeline is communicated with the rich liquor inlet of a rich and poor liquid heat exchanger; rich liquor that flows out of the rich and poor liquid heat exchanger is further divided into two channels; one channel is communicated with a rich liquor inlet formed in the central part of the regeneration tower; the other channel is communicated with the rich liquor inlet of a rich liquor reheater; the rich liquor outlet of the rich liquor reheater is communicated with the rich liquor inlet of a rich liquor flash tank; the rich liquor outlet formed in the bottom of the rich liquor flash tank is communicated with a rich liquor inlet formed in the lower part of the regeneration tower. According to the invention, the regeneration degree of the rich liquor can be increased and steam heat consumption needed during rich liquor regeneration can be reduced; in addition, steam condensates can be recycled in the lyophobic collecting box of main equipment to reduce the desalted water consumption of the trapping system.

The invention provides a high-voltage inductive energy acquiring power supply and a method for acquiring the power supply from a high-voltage wire. The high-voltage inductive energy acquiring power supply comprises an energy acquiring unit for inducing a first electromotive force from the high-voltage wire, a compensating unit for inducing a second electromotive force different from the first electromotive force from the high-voltage wire and reversely compensating a part of the first electromotive force through the second electromotive force to finally balance output voltage, a surge protection unit connected to the energy acquiring unit and the compensating unit respectively, a rectifying filter unit connected to the surge protection unit and used for converting alternating current acquired by the energy acquiring unit and the compensating unit together into direct current and filtering the direct current, and a voltage reducing and stabilizing unit for stabilizing output voltage of the rectifying filter unit and reducing the stabilized voltage to be proper constant pressure output. Through introducing a compensating coil, the method uses difference of initial permeability of different magnetic materials to generate different electromotive forces to be reversely counteracted, so as to achieve wide-range compensation, output steady power, simplify circuits and reduce heat consumption.

The invention provides a distributed energy system modeling and running optimization method considering a hot water pipe network. According to the method, a new distributed energy system physical model is built, and power and heat combined production and supply are realized in a certain regional range by fully utilizing electric power of a power grid, clean natural gas, high-temperature waste heat and renewable energy sources such as solar energy, terrestrial heat and the like in the nature through connection with the power grid and integration of advanced technologies of a gas turbine, a solar photo-thermal system, a heat pump system, a waste heat boiler, an electric hot water boiler and the like; a system daily running optimization policy containing two layers of optimization models is established, and energy and economic benefits of a system are realized by considering heat consumption of the hot water pipe network, making an energy purchase plan and minimizing energy consumption and running costs in a system running process; and through comparative analysis of the method and a conventional energy supply system, a result shows that the method has the advantages that the energy resources are saved and the economic costs are reduced.

The present invention provides a rectifying method having differential pressure and lower energy consumption, and an apparatus, including a general knockout tower section, a underpressure knockout tower section, a main reboiler, a reflux accumulator and a compressor, wherein , a compressor is set between the underpressure knockout tower section and the general knockout tower section, the gas material tube on the top of the underpressure knockout tower section is connected to the inlet of the compressor, the outlet of the compressor is connected to the gas inlet ont the bottom of the general knockout tower section; gas material outlet of the general knockout tower section is connected to the heat medium inlet of the main reboiler, heating medium outlet is connected to the reflux accumulator of the general knockout tower section; the liquid outlet on the bottom of the general knockout tower section is connected to the liquid inlet of the underpressure knockout tower section; the liquid material outlet tube on the bottom of the underpressure knockout tower section is connected to the cooling medium inlet of the main reboiler, outlet of the cooling medium is connected to the inlet of the reboiler of the underpressure knockout tower section. The invention realises thermally coupled distillation, matching heat exchange. The minimum heat consumption is realised by differential pressure temperature reduction means, even the cool-heat load are fully matched, the consumption is zero. Ways to achieve the aim only is adding a compressor in the equipment, the dynamic consumption is lower than the original consumption.

The invention provides a multi-energy composite hot water system control method with a pre-judgment calculation function. The control method comprises the steps of 1) calculating the average heat consumption quantity Q within a period of time by use of the system, 2) correcting the average heat consumption quantity Q according to the weather forecast air temperature information and configuring the supply water quantity V and the heat storage temperature T of a heat accumulation water tank according to the corrected average heat consumption quantity, 3) calculating the heating capacity Q solar energy of a solar heat source system, and 4) calculating the running time of a heat pump by use of the system, calculating the desired heating time t of the heat pump according to the surplus heat quantity Q surplus, and setting a water temperature detection time interval t1, the start time t1-t of the heat pump and the like. The multi-energy composite hot water system control method with the pre-judgment calculation function is used for effectively avoiding the heating of excessive water each day, reducing waste, improving the operating efficiency of the heat sources, fully developing the advantages of the various heat sources, and saving more energy.

The invention relates to a coke oven heating automatic control method; in the method, the temperature of a coke oven is measured, a coke oven heating gas flow rate model and a sub-flue suction model are used for calculating heating gas flow rate Q and sub-flue suction a which are respectively controlled to realize the control over the temperature of the coke oven. The method can achieve the purposes of enhancing the control precision of the temperature of the coke oven, improving the quality of coke, maximally reducing the heat consumption in coking and saving energy by mastering and utilizing the change law of the temperature of the coke oven in the coke oven heating automatic control process.

The invention relates to the technical field of charge, and discloses an equalizing charge method and an equalizing charge device for a battery. The device comprises a control module; the control module monitors the voltage signal of each single battery; and when the voltage signal of the monitored single battery exceeds a comparison voltage value, a shunt unit connected in parallel with the single battery is controlled to shunt so as to reduce the charge current of the single battery. Because the adopted shunt unit can automatically realize voltage balance between the single batteries, the equalizing charge method and the equalizing charge device for the battery can gradually reduce the inconsistency of a battery pack, ensure that all the single batteries in the battery pack reach consistency after several times of charge cycle, and effectively ensure the safety of each single lithium battery in use and prolong the service life; and the device has the advantages of simple control, low cost, higher efficiency and low heat consumption, can replace an expensive special equalizing chip, and can be widely applied in civilian industry products supplied with power by the lithium battery.

The invention provides a three-port DC-DC (direct current) converter topology circuit which comprises a control module, a solar array input end, a bus end and a storage battery end, wherein the input end of the control module is connected with the solar array input end, the bus end and the storage battery end respectively. The three-port DC-DC converter topology circuit also comprises a Buck-Boost circuit connected between the solar array input end and the bus end and a double-direction SuperBuck circuit connected between the bus end and the storage battery end, wherein the control end of the Buck-Boost circuit and the control end of the double-direction SuperBuck circuit are respectively connected with the output end of the control module. The three-port topology structure exchanges a bus port of a three-port topology and a port of a storage battery, primary energy transformation is only needed from a solar battery array to a bus, thus efficiency can be greatly improved, the heat consumption of the integral machine is reduced, heat dissipation measures are reduced, and cost is reduced.

The invention provides a burning method for preparing an energy-conservation and emission-reduction type active lime. The method comprises the following steps: subjecting the raw material (1) limestone to size grading; respectively and evenly distributing the limestone of different grades into each preheating chamber (8.1) of a novel vertical preheater (8), preheating and partially decomposing the limestone with high temperature exhaust gas and introducing the limestone into a rotary kiln (15); calcining and decomposing the limestone under the action of a temperature field to allow CO2 to be produced and the limestone to become lime; and allowing the lime to enter into a shaft well device (18) for annealing and heat exchange, then introducing the lime into a cooling machine (19) for cooling and carrying out screening to separate blocky lime from powdery lime, thereby obtaining finished products, i.e., blocky lime and powdery lime. The invention further provides an apparatus composed of a size grading device (2), a distributor (5), a distribution warehouse (6), the novel vertical preheater (8), the rotary kiln (15), a kiln hood (17), a combustor (16), the shaft well device (18) and the cooling machine (19) for the method. The method and the apparatus provided by the invention has the characteristics of an expandable range of the size of the raw material limestone, low heat consumption, high production efficiency, a high activity degree of the products, low discharge of SO2 and exhaust gas, low cost, simple and convenient operation and capacity of meeting needs of larger-scale industrial production.

The invention provides a process and a device for the dry distillation of lignite on the basis of coke-carried heat, particularly for the dry distillation and intensive processing of low-grade lignite. The device of the invention mainly comprises a crushing and screening device, a drying bed, a separator, a primary dry distiller, a secondary dry distiller, a combustion bed and an oil-gas separation system. The process of the invention comprises the following steps: crushing and screening lignite before being fed into the drying bed; drying the lignite by the flue gas from the combustion bed and feeding the dried lignite into the primary dry distiller; dry-distilling the lignite at certain temperature by the hot coke from the combustion bed and the coal gas of the secondary dry distiller as the heat carrier and carrier gas respectively; feeding the obtained oil and gas into the oil-gas separation system, and allowing the solid product to drop into the secondary dry distiller to carry out the secondary dry distillation on the solid product by the hot coke and high-temperature coal gas as the heat carrier; and cooling and feeding the obtained semi-coke product into a storage tank or the combustion bed for cycle use, wherein the hot coke and high-temperature flue gas are provided by the combustion bed through oxygen-controlled combustion. The invention has the advantages of small investment, even heat transfer, high rate, low heat consumption, high yield of semi-coke, tar and coal gas and the like.