CN2874272Y

CN2874272Y - Boiler water feeder

Info

Publication number: CN2874272Y
Application number: CN 200620054815
Authority: CN
Inventors: 杨丽邦
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-10
Filing date: 2006-02-10
Publication date: 2007-02-28
Anticipated expiration: 2016-02-10

Abstract

The utility model relates to a water feeding device for boiler. The utility model is characterized in that: one or more than one heat conducting water tank is connected in series in the flue at the rear section of the boiler; flue passage that enables the passage of flue gas from the flue at the rear section of the boiler, as well as heat conducting water passage that enables the flow of water that absorbs the heat of the flue gas are arranged in the heat conducting water tank; the aforesaid flue passage and heat conducting water passage of the aforesaid heat conducting water tank are connected in series; the flue gas enters through the inlet of the flue passage in the first heat conducting water tank, passes through the flue passage of the heat conducting water tank and comes out from the outlet of the flue passage in the last heat conducting water tank. The external water source enters through the inlet of the heat conducting water passage in the last heat conducting water tank, passes through the heat conducting water passage of the heat conducting water tank, flows out of the outlet arranged in the heat conducting water passage in the first heat conducting water tank and is fed again to the water feeding inlet of the boiler. The utility model can fully utilize the residual heat in the flue gas discharged by the boiler, improve the temperature of supplied water to the boiler, save energy, enhance the heat efficiency of boiler and improve the water quality.

Description

A kind of boiler feedwater device

Technical field

The utility model belongs to a kind of energy-saving device of boiler, relates in particular to a kind of boiler feedwater device.

Background technology

Existing boiler 9 discharged flue gas, after economizing matchmaker's device 91 and heat exchanger 92, promptly enter in the air by boiler back end ductwork, economize the part heat that matchmaker's device 9 and heat exchanger 10 have only utilized the boiler emission flue gas, the flue-gas temperature in the boiler back end ductwork is still just up to 300～400 ℃, therefore a large amount of heats slatterns in vain, and, because it is low to send into the boiler feed temperature of province matchmaker device 91, the water oxygen level height, cause the poor quality of water, the steel plate of boiler 9 inside is corroded easily.

Summary of the invention

The purpose of this utility model just provides a kind of waste heat that makes full use of the boiler emission flue gas, improves the boiler feedwater device of boiler feed temperature.

For achieving the above object, a kind of boiler feedwater device of the utility model, be at boiler back end ductwork, the one or more overheated water tank of serial connection successively is set, this overheated water tank is provided with the superheated water passage that allows cigarette wind passage that the flue gas of boiler back end ductwork passes through and allow the water that absorbed flue gas heat flow through, the described cigarette wind passage of the one or more overheated water tank of serial connection successively is connected in series successively, the superheated water passage is connected in series successively, the route that passes through according to the flue gas in the boiler back end ductwork, flue gas advances mouth from the cigarette wind passage of first overheated water tank and enters, flow through the cigarette wind passage of the one or more overheated water tank of serial connection successively, flow out from the cigarette wind passage outlet flue of the last overheated water tank, and external water source is from the superheated water passage water inlet inflow of the last overheated water tank, the superheated water passage of the one or more overheated water tank of the serial connection of flowing through successively, then, flow out from the superheated water passage delivery port of first overheated water tank, deliver to the feed-water intake of boiler again, as required, also can deliver to the feed-water intake of boiler again through water pump.

Above-mentioned one or more overheated water tank can be: the cigarette wind passage of its each overheated water tank adopts a plurality of cigarette wind heat pipes, and overheated water tank is interior, cigarette wind heat pipe is outward the superheated water passage.Also can be: the superheated water passage of its each overheated water tank adopts a plurality of superheated water heat pipes, and at this moment, overheated water tank is interior, the superheated water heat pipe is outward a cigarette wind passage.Can also be: the cigarette wind passage of its a kind of superheated water case adopts a plurality of cigarette wind heat pipes, overheated water tank is interior, cigarette wind heat pipe is outward the superheated water passage, the superheated water passage of another kind of overheated water tank adopts a plurality of superheated water heat pipes, and overheated water tank is interior, the superheated water heat pipe is outward a cigarette wind passage.

Described cigarette wind heat pipe can adopt stainless steel tube, and the superheated water heat pipe also can adopt stainless steel tube.

In a preferred implementation, adopt two overheated water tanks.

The utility model is provided with overheated water tank at boiler back end ductwork, the feedwater of boiler is flowed in overheated water tank automatically, absorb the heat of flue gas, flue gas washes away overheated water tank automatically, through above heat exchange, can improve feed temperature tens degree, the temperature difference of boiler water and feedwater is dwindled, and the temperature-rise period of boiler heating surface water shortens, the vaporization ability improves, reach and be sparing in the use of coal, improve the purpose of boiler thermal output, and, because the raising of feed temperature, water oxygen gas evaporation, the quality of water is improved, and can alleviate in the water pernicious gas to the corrosion of boiler internal steel plate.

Description of drawings

Fig. 1 is a boiler structure schematic diagram of using the utility model embodiment;

Fig. 2 is the route map that the boiler smoke of Fig. 1 flows through;

Fig. 3 a, Fig. 3 b are the structural representations of the overheated water tank 1 of the utility model embodiment;

Fig. 4 a, Fig. 4 b be the overheated water tank 2 of the utility model embodiment structural representation;

The specific embodiment

As Fig. 1, shown in Figure 2, the utility model embodiment comprises two overheated water tanks, an overheated water tank 1, another overheated water tank 2.

Shown in Fig. 3 a, Fig. 3 b, be provided with the stainless steel tube 11 of 20 76MM in the overheated water tank 1, in the stainless steel tube 11 the superheated water passage that water flows through, in the overheated water tank 1, stainless steel tube 11 is outer is the cigarette wind passage that flue gas passes through.

Shown in Fig. 4 a, Fig. 4 b, be provided with the stainless steel tube 21 of 49 76MM in the overheated water tank 2, in the stainless steel tube 21 be in the cigarette wind passage that passes through of flue gas, the overheated water tank 2, stainless steel tube 21 is outer is the superheated water passage.

Overheated water tank 1 and overheated water tank 2 serial connections, place the flue of boiler tail, the cigarette wind passage that the cigarette wind passage outlet flue 13 of overheated water tank 1 is connected overheated water tank 2 advances mouth 22, the superheated water passage water inlet 14 of overheated water tank 1 is connected the superheated water passage delivery port 25 of overheated water tank 2, flue gas 3 in the boiler back end ductwork advances mouth 12 from the cigarette wind passage of overheated water tank 1 and enters, flow through the cigarette wind passage of overheated water tank 1 and overheated water tank 2, flow out from the cigarette wind passage outlet flue 23 of overheated water tank 2, at last, flue gas advances aerial from chimney 8 dischargings.And the water 5 in outside pond 4 is from superheated water passage water inlet 24 inflows of overheated water tank 2, the flow through superheated water passage of overheated water tank 2 and overheated water tank 1, flow out from the superheated water passage delivery port 15 of overheated water tank 1, the superheated water of overheated water tank 1 outflow is delivered to the feed-water intake 7 of boiler by a water pump 6 again.

The utility model embodiment is at first by the water of overheated water tank 2 preliminary heating from outside pond 4, flue gas passes through in the stainless steel tube 21 of overheated water tank 2, heat conduction through stainless steel tube 21, in overheated water tank 2, stainless steel tube 21 outer water heat, water through boiler 2 heating is further delivered in the stainless steel tube 11 of overheated water tank 1 again, heat conduction by stainless steel tube 11, in the overheated water tank 1, the stainless steel tube 11 outer water from 3 pairs of stainless steel tubes of flue gas 11 of boiler back end ductwork further heat, then, by water pump 6, will deliver to the feed-water intake 7 of boiler through the superheated water of

boiler

2 and 1 heating of overheated water tank.

The utility model utilizes the high-temperature flue gas of boiler back end ductwork, at first with the water heat temperature raising, when heating up, removes the water oxygen pernicious gas, afterwards, is re-used as the feedwater of boiler.Energy savings improves boiler thermal output, alleviates the corrosion of water oxygen to boiler.

Claims

1. boiler feedwater device, it is characterized in that: at boiler back end ductwork, the one or more overheated water tank of serial connection successively is set, this overheated water tank is provided with the superheated water passage that allows cigarette wind passage that the flue gas of boiler back end ductwork passes through and allow the water that absorbed flue gas heat flow through, the described cigarette wind passage of the one or more overheated water tank of serial connection successively is connected in series successively, the superheated water passage is connected in series successively, the route that passes through according to the flue gas in the boiler back end ductwork, flue gas advances mouth from the cigarette wind passage of first overheated water tank and enters, flow through the cigarette wind passage of the one or more overheated water tank of serial connection successively, flow out from the cigarette wind passage outlet flue of the last overheated water tank, and external water source is from the superheated water passage water inlet inflow of the last overheated water tank, the superheated water passage of the one or more overheated water tank of the serial connection of flowing through successively, flow out from the superheated water passage delivery port of first overheated water tank, deliver to the feed-water intake of boiler again.

2. boiler feedwater device according to claim 1 is characterized in that: described one or more overheated water tank, and the cigarette wind passage of its each overheated water tank adopts a plurality of cigarette wind heat pipes, and overheated water tank is interior, cigarette wind heat pipe is outward the superheated water passage.

3. boiler feedwater device according to claim 2 is characterized in that: described cigarette wind heat pipe adopts stainless steel tube.

4. boiler feedwater device according to claim 1, it is characterized in that: described one or more overheated water tank, the superheated water passage of its each overheated water tank adopts a plurality of superheated water heat pipes, and overheated water tank is interior, the superheated water heat pipe is outward a cigarette wind passage.

5. boiler feedwater device according to claim 4 is characterized in that: described superheated water heat pipe adopts stainless steel tube.

6. boiler feedwater device according to claim 1, it is characterized in that: described one or more overheated water tank, the cigarette wind passage of its a kind of superheated water case adopts a plurality of cigarette wind heat pipes, overheated water tank is interior, cigarette wind heat pipe is outward the superheated water passage, the superheated water passage of another kind of overheated water tank adopts a plurality of superheated water heat pipes, and overheated water tank is interior, the superheated water heat pipe is outward a cigarette wind passage.

7. boiler feedwater device according to claim 6 is characterized in that: described cigarette wind heat pipe adopts stainless steel tube, and the superheated water heat pipe adopts stainless steel tube.

8. according to each described boiler feedwater device in the claim 1 to 7, it is characterized in that: described one or more overheated water tank adopts two.

9. according to each described boiler feedwater device in the claim 1 to 7, it is characterized in that: the described water that flows out from the superheated water passage delivery port of first overheated water tank is delivered to the feed-water intake of boiler through water pump.

10. boiler feedwater device according to claim 9 is characterized in that: described one or more overheated water tank adopts two.