A heat pipe type falling film evaporation low temperature waste heat utilization and water recovery equipment

Abstract

Heat pipe falling film evaporation low temperature waste heat utilization and water recovery equipment, including flue, heat pipe group, evaporation chamber, liquid storage tank, water collection pipe, water collection tank, booster pump, liquid distributor, return pipe, liquid filter, main Steam pipeline, condensing device and distributed control device; the evaporation chamber is surrounded outside the flue in a ring shape; the heat pipe group is horizontally inclined at 5-10° and distributed symmetrically in the center, the heated end extends into the flue, and the cold end extends into the evaporation chamber; The liquid distributor is set above the cold end of the heat pipe group; the top of the evaporation chamber is equipped with a filter; the organic working medium is sprayed from the liquid distributor to the uppermost heat pipe group for falling film evaporation, and the steam generated enters the main steam pipe through the filter without evaporation. The working medium flows into the liquid storage tank for recycling; the moisture in the flue gas condenses and flows into the water collection tank along the heat pipe group for recovery; it is a low-cost, high-efficiency low-temperature flue gas waste heat recovery equipment, which uses low-temperature waste heat to produce high-grade steam for providing Power, power generation, refrigeration, heating, and recovery of moisture in flue gas, water saving, energy saving and emission reduction.

Description

technical field [0001] The invention relates to waste heat and water recovery and utilization equipment, in particular to a heat pipe type falling film evaporation low-temperature waste heat utilization and water recovery equipment, which belongs to the technical field of energy saving and emission reduction. Background technique [0002] Most of the industrial waste heat of about one billion tons of standard coal equivalent emitted in my country every year is low-temperature flue gas waste heat. Using water as the working medium of the Rankine cycle is inefficient and even impossible to recover. The discharge of the moisture contained in the flue gas into the atmosphere is also a major cause of the "fog" weather in our country, which reduces the transparency of the air and affects the human living environment. [0003] Existing waste heat recovery equipment generally uses shell-and-tube heat exchangers to recover waste heat from flue gas, but the heat transfer coefficient o...

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Problems solved by technology

[0005] Existing organic Rankine cycle thermal devices generally produce steam with subcritical parameters and drum-type pool boiling. Although the invention patents CN201110371040.3 and CN201110371010.2 use heat pipes as heat-conducting elements, the labor required for drum-type pool boiling is very high. Large, organic working medium is expensive (the cost per ton is about 10,000 yuan), resulting in high equipment investment; the superheat required for pool boiling is generally above 10°C to ensure steam production, and the superheat for falling film evaporation is 2~ Higher steam production can be guaranteed at 3°C, which expands the utilization range of low-temperature waste heat resources

[0006] However, although the existing technology of utility model patent CN200720032022.1 adopts the principle of falling film evaporation for heat exchange, the structural size is too fixed and it is inconvenient to use

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