Fire tube gas hot water boiler

Abstract

The invention relates to a fire tube type gas hot-water boiler. A boiler body and a heat exchanger are of a top-bottom split type structure. The boiler body is a sealed water tank, and water is placed in the water tank as a heat-transfer medium. A wave-shaped boiler furnace, a big smoke tube and a small smoke tube are horizontally arranged on the lower half portion in the boiler body and located under the water surface. Natural gas is led into a combustor to be burned. Hot smoke generated through burning enters the wave-shaped boiler furnace, the big smoke tube, a front smoke box, a small smoke tube, a rear smoke box and a chimney in sequence, and heats the water in the boiler body to generate saturated vapor. The heat exchanger is arranged on the boiler body. The bottom of the heat exchange and the top of the boiler body are communicated through a plurality of communicated connecting pipes. The fire tube type gas hot-water boiler heats feedwater in pipe bundles of the heat exchanger through utilization of vaporization latent heat discharged after the saturated vapor in the boiler body is condensed, avoids salt scaling and low-temperature corrosion in a boiler pipe, improves heat transfer efficiency of a heating surface, reduces energy waste, and reduces exploiting cost.

Description

technical field [0001] The invention relates to a special equipment for thermal exploitation in the petroleum industry, in particular to a special fire tube type gas hot water boiler for oil fields. Background technique [0002] With the increase of the oil field production time, the energy of the oil layer itself is continuously consumed, resulting in a continuous drop in the pressure of the oil layer, a large amount of degassing of underground crude oil, and an increase in viscosity, resulting in a large amount of dead oil remaining underground. Injecting hot water into the oil layer through the water injection well is an important way to maintain the bottom pressure and ensure high and stable production of the oil field, which can greatly improve the recovery rate of the low permeability oil field. [0003] However, in the process of oil field production, the furnace tube scaling and dew point corrosion of the low temperature heating surface caused by water injection equi...

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Problems solved by technology

[0003] However, in the process of oil field production, the scale of the furnace tube and the dew point corrosion of the low-temperature heating surface caused by the salt precipitation in the high-temperature heating area of ​​the water injection equipment have brought a lot of trouble to the production.

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