Energy saver for vertical natural circulation condensing boiler

Abstract

The invention discloses an energy saver for a vertical natural circulation condensing boiler. The energy saver is divided by a smoke baffle into an air heating chamber on the upper side and a smoke cooling chamber on the lower side. The smoke cooling chamber is provided with a smoke discharge opening and a smoke recovery opening. The air heating chamber is provided with an air outlet channel and an air inlet channel. A heat exchanger vertically penetrating through the smoke baffle is arranged at the center of the energy saver. A non-condensate heated face between the smoke recovery opening and the heat exchanger and a condensate heated face between the smoke discharge opening and the heat exchanger are arranged in the smoke cooling chamber. The temperatures of the condensate heated face, the heat exchanger and the non-condensate heated face are gradually increased. The energy saver has the technical advantages that smoke heat is recovered, the air inlet temperature and the water inlet temperature of the boiler are synchronously increased through heating, the defect that only the air inlet temperature of an existing vertical gas boiler is increased through heating is overcome in a breakthrough mode, and manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to an economizer for a vertical natural circulation condensing boiler. Background technique [0002] At present, the existing gas-fired boilers are mainly divided into two types: vertical and horizontal. The tail condensing heat exchanger of the horizontal gas-fired boiler has the following disadvantages: the single use of condensation recovery will generate a large amount of condensed water. With the current technology, even if acid-resistant steel or Stainless steel cannot guarantee the service life of the condenser, and the single condensation recovery makes the heat exchanger too bulky and consumes a lot of steel. Since the condensation surface cannot be accurately controlled, the selected materials must use corrosion-resistant materials, which greatly increases the cost. [0003] At present, the tail economizers of vertical gas boilers have the following disadvantages and deficiencies: the use of conventional tail heat exchan...

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Problems solved by technology

[0002] At present, the existing gas-fired boilers are mainly divided into two types: vertical and horizontal. The tail condensing heat exchanger of the horizontal gas-fired boiler has the following disadvantages: the single use of condensation recovery will generate a large amount of condensed water. With the current technology, even if acid-resistant steel or Stainless steel cannot guarantee the service life of the condenser, and the single condensation recovery makes the heat exchanger too bulky and consumes a lot of steel. Since the condensation surface cannot be accurately controlled, the selected materials must use corrosion-resistant materials, which greatly increases the cost.

[0003] At present, the tail economizers of vertical gas boilers have the following disadvantages and deficiencies: the use of conventional tail heat exchangers takes up a large area and consumes a lot of steel. The single use of air preheater recovery has limited recovery effects, large structures, and heat transfer accuracy cannot be achieved. Control, once the flue gas condensation occurs, it will be corroded quickly

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