40results about How to "Save factory electricity" patented technology

The invention discloses SCR (Selective Catalytic Reduction) denitration reducing agent urea pyrolysis heat source supply method and device, belonging to the field of preparing an NOx denitration reducing agent. The method comprises the steps of arranging a heat exchanger at a boiler flue gas area, and heating primary hot air which is introduced into the heat exchanger to the pyrolysis temperature of urea by utilizing the boiler flue gas of the area. The device comprises the boiler flue gas area with flue gas temperature of 400-900 DEG C, a device capable of generating primary hot air in the boiler, and an urea pyrolysis reactor, wherein the heat exchanger is arranged at the boiler flue gas area, the heat exchanger is connected with the device capable of generating primary hot air in the boiler, and used for introducing the primary hot air to be heated by flue gas of the boiler flue gas area, and the primary hot air heated by the heat exchanger is introduced to the urea pyrolysis reactor. The invention relates to an SCR denitration reducing agent urea pyrolysis heat source supply method and device which are lower in the energy consumption and running cost of the urea pyrolysis technique.

The invention discloses a closed water cooling system with a double-evaporative cooling pressure, which provides the closed water cooling system used in an air-cooled thermal power set. The closed water cooling system comprises a direct-current evaporating and cooling closed water chiller A, a direct-current evaporating and cooling closed water chiller B, a vacuum butterfly valve, a vapor injector A, a vapor injector B, five sections of steam extracting and entering regulating valve, a plant steam aiding and entering regulating valve, a NO. 8 low pressure heater, a condenser, a liquid level sensor and a DCS (distributed control system); pipe sides of the two direct-current evaporating and cooling closed water chillers A and B are connected in series; and an evaporating and cooling pressure at a casing side of B is lower than that of A, thus the problem that output power of a turbo generator set is limited by an overhigh temperature of closed water is solved, cooling conditions of a host machine and an auxiliary machine are improved, heat output by hot closed water is recycled as much as possible, and power consumption of the closed water system is lowered. By the adoption of the closed water cooling system, no wet-type mechanical ventilated cooling tower is needed for open circulated water cooling, the occupation area of the cooling tower is reduced, the investment on capital construction is reduced, the electricity consumption is decreased, and the water consumption is zero.

The invention discloses a vacuum energy vortex steam condenser which comprises a cylindrical vortex generating chamber, wherein a condensate collecting chamber is communicated with the lower part of the vortex generating chamber, a vacuum pump is connected with the upper end of the vortex generating chamber through a vacuum pipe, a spout is formed on the side wall of the vortex generating chamber and tangential to the generatrix of the inner wall of the vortex generating chamber and used for injecting the steam exhaust from a steam turbine, a condensate pump is connected with the lower end of the condensate collecting chamber through a condensate delivery pipe, the spout is a slit penetrating the vortex generating chamber in the vertical direction, and a wedged nozzle is communicated with the spout. The vacuum energy vortex steam condenser has the advantages of simple operating principle, economic efficiency and applicability, high efficiency and energy saving, safety and reliability, simple construction and installation, convenience for operation and maintenance, stable operation, lower water consumption as compared to a wet cooling unit, higher heat efficiency as compared to an air cooling unit, and lower investment as compared to a wet cooling unit.

The present invention relates to a chemical ultrafiltration water production system equipment and a control method thereof. The equipment includes: at least one ultrafiltration raw water tank for providing water source; multiple ultrafiltration water production pumps connected to at least one ultrafiltration raw water tank, multiple One ultrafiltration product water pump is set in a sequential start-stop mode, and multiple ultrafiltration product water pumps are used to pump out the water source in at least one ultrafiltration raw water tank; multiple ultrafiltration devices are electrically connected to multiple ultrafiltration product water pumps. The quantity of one ultrafiltration product water pump is greater than the quantity of multiple ultrafiltration devices, and multiple ultrafiltration devices are used to control the start or stop of multiple ultrafiltration product water pumps and receive and filter water sources. When any ultrafiltration device in multiple ultrafiltration devices The filter device is started, and a signal is sent to control multiple ultrafiltration product water pumps to start one of the ultrafiltration product water pumps in sequence. The invention can intelligently adjust the number of ultrafiltration water production pumps operating according to the number of ultrafiltration devices in operation, and make multiple ultrafiltration water production pumps active and standby each other, so that the automatic standby rate, equipment fault tolerance and utilization rate are greatly improved.

The invention discloses a control system for a low pressure main throttle valve stroke test of a small turbine. A low pressure main throttle valve is composed of an emergency trip protection system and an electro-hydraulic control system. The low pressure main throttle valve includes a full open stroke switch, a full closed stroke switch and a 75% stroke position stroke switch. A normally open contact of a wait-to-restore intermediate relay of a control cabinet of the emergency trip protection system is connected with a power source and a low pressure main throttle valve opening key circuit. Arestoration condition is added in control logic of the electro-hydraulic control system. The restoration condition is that a pulse signal is added when starting the test and closing the low pressuremain throttle valve, wherein logic OR operation is performed on the pulse signals and low pressure main throttle valve test in-place; if one condition is met, a low pressure main throttle valve closing command is restored and a low pressure main throttle valve opening command is sent after logic AND operation on the low pressure main throttle valve closing command after time delay disconnection. Therefore, tripping of a pump due to a fact that the 75% stroke position stroke switch cannot reflect throttle valve position signals accurately can be prevented.