40results about How to "Avoid land occupation" patented technology

The invention discloses an underground selection, screening and stirring integrated gangue cementation construction filling system and method. The system comprises an underground coal and gangue separating device, an underground gangue crushing and screening device, an underground filling material weighing and stirring device, an underground filling material slurry conveying device, an underground filling material slurry casting device and a PLC control device. The filling method comprises the steps that raw coal mined from a driving working face and a mining working face is transported to a raw coal bunker of a mining area, separated clean coal is transported to a clean coal bunker and is lifted by a main well, separated gangues are fed into a gangue crushing machine, and the gangues undergoing secondary smashing are fed into a gangue screening device; various raw filling materials are respectively fed into a burdening hopper, and filtered mine water is added to obtain filling material pulp through stirring after even and drying stirring; the filling material pulp is transported to a filling working face by a stirring transportation truck, then is cast into a filling formwork by a movable filling pump truck and is evenly vibrated by using a vibration device. By adopting the system and method, the mine transportation and lifting pressure is reduced, the working efficiency is improved, and the mining-filling balance of coal mine waste is achieved.

The invention provides an energy-saving efficient heat exchanger. The energy-saving efficient heat exchanger comprises a cabinet, a hot water tank for storing hot water, a cold water tank for storingcold water, a self-adaptive narrow-channel heat exchange mechanism, a steam circulation pipeline mechanism, motors and motor cooling fins, wherein the hot water tank and the cold water tank are fixedly connected with the cabinet, the self-adaptive narrow-channel heat exchange mechanism is connected with the hot water tank and the cold water tank on the cabinet through the steam circulation pipeline mechanism, and the surface of the hot water tank is provided with a hot water inlet pipe and a hot water outlet pipe in a sleeve mode. The invention relates to the field of heat exchangers. According to the energy-saving efficient heat exchanger, the self-adaptive narrow-channel heat exchange mechanism and the steam circulation pipeline mechanism are arranged, the heat of the motors is subjectedto all-position efficient heat exchange in a single machine self-adaptive wrapped mode, the heat is recycled in a comprehensive centralized mode of the multiple motors, layout is reasonable, energy consumption is reduced, so that the problems that for a common factory, high-power motors are relatively centralized, the generated heat is relatively dispersed, and the existing technology is not onlyhigh in cost, but also low in energy recycling efficiency can be effectively solved.

The invention discloses a paste filling material used for mine filling and mining, which comprises solid material and water, and the mass concentration of the solid material in the filling material is 75% to 80%; the solid material includes slag and fly ash , cement and additives, the filling material is composed of the following components by weight percentage: 42% to 57% slag, 12% to 33% fly ash, 2% to 8% cement, 0.1% to 0.8% additive and 20.1% ~25.6% water; wherein, the slag accounts for 54.3%~73.7% of the weight of the solid material. The paste filling material provided by the present invention can not only treat power plant waste on a large scale, avoid land occupation and environmental pollution problems, but also provide sufficient filling materials for coal mine filling and mining near the power plant, thereby providing favorable conditions for the environmental management of mining areas and power plants. technical measures.

The invention relates to the radar anti-interference technical field, in particular to a method for inhibiting ionospheric clutter in portable high frequency groundwave radar. In the invention, a plurality of sets of auxiliary crossed loops are arranged in the vertical direction of original crossed loop antennas of the portable high frequency groundwave radar, adaptive cancellation is carried outon the received signals of auxiliary crossed loop antennas, a main crossed loop and monopole antennas; the received signals of the main crossed loop and the monopole antenna are used as a basic inputsignal, the difference of the received signals between each auxiliary crossed loop antenna and the main crossed loop antenna are used as a reference signal to input three mutually independent self-adapting filters; an error signal is output from the self-adapting filters to be echoed signals of the main crossed loop and the monopole for inhibiting ionospheric clutter. The invention has the following advantages: an ideal ionospheric clutter reference signal can be obtained and the working efficiency and detection performance of radars can be greatly increased.

The invention provides a system and a method for drying sludge through the waste heat of a gas turbine. The gas turbine is connected with a generator; a flue gas outlet of the gas turbine is communicated with a waste heat boiler; a steam outlet of the waste heat boiler is communicated with a steam turbine; the steam turbine is connected with the generator; a steam extraction pipe of the steam turbine is communicated with an inlet of a heated surface pipe of an internal thermal type fluidized bed dryer; an air outlet of an air heater is communicated with an air inlet of the internal thermal type fluidized bed dryer; wet sludge enters the internal thermal type fluidized bed dryer through a wet sludge pipe, flows outside the heated surface pipe, is dried and then is discharged into a dry sludge pipe from a discharging hole. Steam is produced through the flue gas waste heat of the gas turbine to push a steam turbine generator set to generate power, and the waste heat of the steam turbine is taken as a heat source for drying the sludge, so that gradient energy utilization is realized, the heat efficiency is high, and a peculiar smell is not discharged; the fluidization air of the fluidized bed dryer is preheated by hot water, so that the energy utilization rate is further improved, and the environmental problems of groundwater pollution and the like caused by sludge burying and soil utilization are effectively solved.

Cooling tower is composed of water chilling unit, control valve, heat exchanger, pump, jet nozzle, stuffing, preserving fan, pool, blowdown apparatus, water compensation tube and valve. Inlet and outlet pipes of water chilling unit, heat exchanger, pump and jet nozzle are connected to each other properly. Inlet of heat exchanger is connected to running water, and its outlet is connected to water for living. Stuffing is put on pool. Preserving fan is installed under the said stuffing. Outlet pipe of blowdown apparatus is connected to inlet pipe of water chilling unit. Fountain is built by using backwater from water chilling unit so as to reduce energy consumption and temp of cooling water for air conditioner.