The invention discloses an energy-saving coal gas cooling system which comprises a coal gas carbonization chamber.Ammonia gas pipelines are arranged at the upper end and the lower end of the carbonization chamber, atomization openings are formed in the bottoms of the ammonia gas pipelines, and the outer ends of the ammonia gas pipelines are connected with an ammonia gas circulating system.The energy-saving coal gas cooling system further comprises an auxiliary power supply device electrically connected with the ammonia gas circulating system, wherein the auxiliary power supply device comprises a solar power generation matrix arranged outdoors, and the solar power generation matrix is electrically connected with the ammonia gas circulating system through an inverter and a storage battery.The auxiliary power supply device further comprises a non-electrical steam power generation device, wherein one end of the non-electrical steam power generation device is electrically connected with the ammonia gas circulating system, and the other end of the non-electrical steam power generation device is electrically connected with a waste heat connecting pipeline.The energy-saving coal gas cooling system adopts solar energy and waste heat of a power plant to replace conventional power sources to provide continuous electric quantity for the ammonia gas circulating system, and the two power source supply modes can make the ammonia gas circulating system operate normally and can also make the energy-saving effect very remarkable due to the fact that the conventional power sources are not consumed.

Energy-saving coal gas cooling system

The invention discloses a method for warming an ammonia synthesis catalyst at low pressure. A synthetic system is firstly communicated with a liquid ammonia storage tank, and then, the pressure of the system is supplemented to be greater than 0.5 MPa; then, a recycle compressor is started to send gas to an oil separator; after greasy dirt separation, the gas is sent to a synthetic tower for warming the ammonia synthesis catalyst; after waste heat recovery by a waste heat recoverer, a heat exchanger and a water heater, the gas is sent to a water cooler for cooling. Through optimizing the processing method, the ammonia synthesis catalyst is warmed; the gas making, desulfuration, conversion, decarburization (carbonization), compression, and alcohol alkylation systems are not needed, and the gas enters the synthetic system by directly utilizing the overbottom pressure of the liquid ammonia storage tank, so that the repeated starting processes of the systems are eliminated, and power consumption and coal consumption for gas compression of the system are accordingly saved.

Method for warming ammonia synthesis catalyst at low pressure

The invention relates to a method for circularly utilizing cooling capacity and a method for increasing yield of synthesis ammonia. The method for circularly utilizing the cooling capacity and the method for increasing the yield of the synthesis ammonia are characterized in that: in a method of synthesizing ammonia, semi-water gas at a temperature less than or equal to 40 DEG C from an energy section enters a spray tower of a cooling tower before entering into a compressor compressed with one section; chilled water at a temperature of 10-20 DEG C from an ion film caustic soda section is pumped to the top of the spray tower of the cooling tower through a chilled water pump and exchanges heat with the semi-water gas to ensure that the semi-water gas is cooled down to below 33 DEG C and then enters into the compressor compressed by one section; the chilled water coming out of the bottom of the spray tower of the cooling tower is pumped to an ammonia cooler through a water recovery pump and cooled to be 10-15 DEG C for chlorine cooling use at the ion film caustic soda section; therefore, the yield of the synthesis ammonia is increased while the cyclic utilization of the cooling capacity is realized.

Zhe Sun

Papers

Method for circularly utilizing cooling capacity and method for increasing yield of synthesis ammonia