The invention discloses a high-pressure molecular sieve circulating dehydration system and a high-pressure molecular sieve circulating dehydration method. The high-pressure molecular sieve circulating dehydration system comprises a molecular sieve dehydrating tower, a compressor, a screen filter, a control blower, a cyclone separator, a heat exchanger, a buffer tank, a gas-liquid separation tank, a combustion heating furnace, a valve and a corresponding control system. Before natural gas enters the molecular sieve dehydrating tower for dehydration, the pressure of the molecular sieve dehydrating tower is increased to 25MP and the dehydration operation is performed at a high pressure. The operation has the advantages that the equipment is small in volume, less in pressure loss and suitable for skid-mounting. The cyclone separator is arranged at a natural gas outlet to perform gas-solid separation on the natural gas which is about to enter the liquefaction stage so as to prevent the powder powdered by a molecular sieve from entering and blocking liquefaction equipment of the next stage to influence the liquefaction efficiency. The whole process adopts closed cycle regeneration operation, the regenerated gas can be recycled, and meanwhile, the waste heat of the regenerated gas can be effectively utilized to reduce energy consumption.

High-pressure molecular sieve circulating dehydration system and method

The present invention discloses a heavy hydrocarbon removal unit for pipeline natural gas The heavy hydrocarbon removal unit mainly comprises a heavy hydrocarbon adsorber, a regeneration gas heater, a heavy hydrocarbon and regeneration gas heat exchanger, a regeneration gas and heavy hydrocarbon separation tank and a high-pressure energy saver The heavy hydrocarbon adsorber is arranged at the downstream part of a molecular sieve dehydration unit, comprises two heavy hydrocarbon adsorption beds, and is used for removing aromatic hydrocarbon, naphthenic hydrocarbon and long-chain alkanes with a carbon number greater than 6 The present invention further discloses a technological method for removing heavy hydrocarbon in the pipeline natural gas by applying the heavy hydrocarbon removal unit Extra heavy components in the pipeline natural gas are removed by utilizing physical absorption at first, and then other heavy components are removed by utilizing condensation separation, so that efficient heavy hydrocarbon removal is realized, a possible heavy hydrocarbon accumulation problem is solved, the apparatus universality is improved, and a quick change occasion of gas source components can be better adapted

Heavy hydrocarbon removal unit for pipeline natural gas and heavy hydrocarbon removal method

The utility model discloses a pipeline natural gas heavy hydrocarbon removal unit mainly includes: the cold box, heavy hydrocarbon knockout drum, feed gas / middle gas energy -saving appliance, heavy hydrocarbon adsorber, regeneration gas heater, heavy hydrocarbon regeneration gas heat exchanger, regeneration gas heavy hydrocarbon knockout drum, high -pressure energy -saving appliance. The export of cold box middle part is connected to the heavy hydrocarbon knockout drum. Feed gas / middle gas energy -saving appliance sets up after the heavy hydrocarbon knockout drum for the low temperature natural gas to coming from heavy hydrocarbon knockout drum gas exports carries out rewarming. The utility model discloses utilize earlier the condensation separation to get rid of easy condensation and the big component of solubility in the natural gas, recycle being difficult for the condensation, solubility is little and arouses very easily that the cold box freezes stifled component in the physical absorption desorption pipeline natural gas, so not only realize heavy hydrocarbon's high -efficient desorption, solved possible heavy hydrocarbon and gathered the problem, still improved the commonality of installing, can adapt to air supply component quick change's occasion better.

Dai Lei

Papers

Pipeline natural gas heavy hydrocarbon removal unit