CN210861049U

CN210861049U - Gas boiler flue gas waste heat and condensate water recycling system

Info

Publication number: CN210861049U
Application number: CN201921739332.6U
Authority: CN
Inventors: 齐涵湫
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-06-26
Anticipated expiration: 2029-10-17

Abstract

The utility model belongs to the technical field of boiler equipment, in particular to a gas boiler flue gas waste heat and condensate water recycling system, which comprises a boiler (8), an air preheater (4), a water supplementing preheater (3), a condensate water recycling device (5), a primary net water return pipe (1) and a primary net water supply pipe (2) which are connected through a flue; this device sets up air heater (4) in boiler smoke outlet department, utilizes the high temperature of flue gas for the boiler heating of admitting air, retrieves partial flue gas heat, reduces the exhaust gas temperature, makes the air carry out preliminary intensification before getting into combustor (9), improves the air temperature, reduces the heat loss of discharging fume.

Description

Gas boiler flue gas waste heat and condensate water recycling system

Technical Field

The utility model belongs to the technical field of boiler equipment, especially, relate to a gas boiler flue gas waste heat and comdenstion water recycle system.

Background

With the emphasis of the country on environmental protection and the reduction of pollutant emission, most areas in the north of China have changed the traditional coal-fired heat supply boiler into a gas-fired heat supply boiler for supplying heat for life and industry. However, the exhaust gas temperature of the existing gas heating boiler is generally between 60 ℃ and 120 ℃, and energy waste exists to a certain extent. The external air needs to be introduced to hydrocarbon fuels such as natural gas in the combustion process, and the gas heating boiler generally directly adopts external cold air to support combustion in winter, because its temperature is lower, absorbs more heat in the combustion process, brings certain influence for boiler efficiency, and hydrocarbon fuel can produce a large amount of water in the combustion process simultaneously, and steam carries the heat and discharges to the atmosphere along with the flue gas, has caused boiler efficiency energy loss, and the water resource can't effectively be recycled simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a problem among the above-mentioned background of effectual solution has proposed a gas boiler flue gas waste heat and comdenstion water recycle system, and concrete technical scheme is as follows:

a gas boiler flue gas waste heat and condensed water recycling system comprises a boiler (8), an air preheater (4), a water supplementing preheater (3), a condensed water recycling device (5), a primary net water return pipe (1) and a primary net water supply pipe (2) which are connected through a flue;

wherein, air enters the pipeline from the air preheater (4) and is combusted with natural gas in the combustor to provide heat for water supply of the primary network; a water supplementing preheater (3) is arranged on the flue behind the air preheater (4) and used for heating water supplied by a water supplementing water tank (7) and supplementing water for the primary net water return pipe (1);

condensed water generated in the heat exchange process is collected by a water collecting funnel connected with the boiler (8) through a flue, conveyed to a water treatment device (6), treated and conveyed to a water supplementing water tank (7) to supplement water for the primary net water return pipe (1);

compared with the prior art, the beneficial effects of the utility model reside in that:

1. an air preheater (4) is arranged at a smoke outlet of the boiler, the high temperature of smoke is used for heating the inlet air of the boiler, partial smoke heat is recovered, the smoke temperature is reduced, the air is preliminarily heated before entering a combustor (9), the air temperature is increased, and the heat loss of smoke is reduced.

2. Set up moisturizing pre-heater (3) behind air heater (4), utilize the flue gas heating running water that carries out a heat transfer, further retrieve heat in the flue gas, reduced exhaust gas temperature, the running water after the heating gets into moisturizing water tank (7), has improved pipe network moisturizing temperature, has reduced the heat absorption behind the pipe network moisturizing entering system.

3. Vapor in the flue gas condenses into water in the heat release process, a condensate recovery device (5) is arranged at the bottom of the chimney at the smoke outlet, flue gas condensate water is collected and is introduced into a water treatment device (6) for purification treatment, and the treated condensate water is introduced into a water supplementing water tank (7) to realize the recycling of water resources.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical personnel in the technical field understand the scheme of the invention better, the invention is further explained in detail with the attached drawings and the embodiment;

a gas boiler flue gas waste heat and condensate water recycling system comprises a boiler 8, an air preheater 4, a water supplementing preheater 3, a condensate water recycling device 5, a primary net water return pipe 1 and a primary net water supply pipe 2 which are connected through a flue;

wherein, the air enters the pipeline from the air preheater 4 and is combusted with natural gas in the combustor to provide heat for the water supply of the primary network; a water supplementing preheater 3 is arranged on the flue behind the air preheater 4 to heat the water supplied by the water supplementing water tank 7 and then is used for supplementing water to the primary net water return pipe 1;

condensed water generated in the heat exchange process is collected by a water collecting funnel connected with the boiler 8 through a flue, conveyed to a water treatment device 6, treated and conveyed to a water supplementing water tank 7 to supplement water for the primary net water return pipe 1;

1. the air preheater 4 is arranged at the smoke outlet of the boiler, the high temperature of smoke is used for heating the inlet air of the boiler, partial smoke heat is recovered, the smoke temperature is reduced, the air is preliminarily heated before entering the combustor 9, the air temperature is increased, and the heat loss of smoke is reduced.

3. Set up moisturizing pre-heater 3 behind air heater 4, utilize the flue gas heating running water that has carried out a heat transfer, further retrieve heat in the flue gas, reduced exhaust gas temperature, the running water after the heating gets into moisturizing water tank 7, has improved pipe network moisturizing temperature, has reduced the heat absorption behind the pipe network moisturizing entering system.

3. Steam in the flue gas is condensed into water in the heat release process, a condensate recovery device 5 is arranged at the bottom of the chimney at the smoke outlet, flue gas condensate water is collected and introduced into a water treatment device 6 for purification treatment, and the treated condensate water is introduced into a water replenishing water tank 7, so that the water resource is recycled;

reforming effect

1. The temperature of the air entering the boiler is improved, and the energy utilization rate and the boiler efficiency are improved.

2. The water replenishing temperature of the pipe network is improved, and the heat absorption capacity of the pipe network after water replenishing enters the system is reduced.

3. The heat in the flue gas and the condensed water generated in the heat release process are recovered, the heat loss of the flue gas is reduced, the utilization efficiency of energy is improved, and the reutilization of water resources is realized.

4. Partial pollutants in the flue gas are condensed together with water vapor in the flue gas condensation process to enter condensed water, so that the emission of the flue gas pollutants is reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A gas boiler flue gas waste heat and condensate water recycling system is characterized by comprising a boiler (8), an air preheater (4), a water supplementing preheater (3), a condensate water recycling device (5), a primary net water return pipe (1) and a primary net water supply pipe (2) which are connected through a flue;

the water collecting funnel connected with the boiler (8) through the flue collects condensed water generated in the heat exchange process, conveys the condensed water to the water treatment device (6), and conveys the condensed water to the water supplementing water tank (7) after treatment so as to supplement water for the primary net water return pipe (1).