CN201050871Y

CN201050871Y - Power cut-off protection forced circulation hot water industrial boiler

Info

Publication number: CN201050871Y
Application number: CNU200720149897XU
Authority: CN
Inventors: 马成果; 任光云
Original assignee: HEILONGJIANG SHUANGGUO BOILER CO Ltd
Current assignee: HEILONGJIANG SHUANGGUO BOILER CO Ltd
Priority date: 2007-05-10
Filing date: 2007-05-10
Publication date: 2008-04-23
Anticipated expiration: 2017-05-10

Abstract

The utility model relates to the technical field of boiler, in particular to a force-circulation hot water industrial boiler which can cut off power to realize protection, for resolving the problem that prior composite circulation industrial water tube boiler needs to open valve to form natural circulation loop, to realize power-off protection, when in power off, to increase cost, while the accident valve will affect the power-off protection function. The technical scheme of the utility model comprises that keeps the basic structures of parts of prior force-circulation boiler as combustion device and boiler wall steel support, and arranges non-heated water diversion tube outside the hearth of boiler body, while two ends of a front water diversion tube are respectively welded with an upper barrel and a lower collecting box at same side, two ends of left and right water diversion tubes are respectively welded with the top collecting box and lower collecting box at same side, and two ends of the back water diversion tube are respectively welded with the upper and lower collecting boxes at same side.

Description

But power-failure protecting forced circulation hot water Industrial Boiler

Technical field

The utility model relates to the boiler technology field, but particularly relates to a kind of power-failure protecting forced circulation hot water Industrial Boiler.

Background technology

At present; boiler is divided into two kinds of forced circulation and natural circulation boilers by working medium in the endless form of boiler internal; forced circulation boiler is forced working medium to flow in pipe by pump and is kept certain flow rate; its shortcoming is that the power-failure protecting function is poor; when having a power failure, working medium stops to flow, if when working medium is water; in pipe, easily produce vaporization and water attack, cause that boiler vibration causes damage in boilers when serious.The patent No. is that a kind of combined-circulation industry water pipe boiler of 00202271.0 has provided and solves when having a power failure; the technical scheme that working medium stops to flow; because the down-comer of connection drum and next part case and drum and upper collecting chamber subsidiary loop are by the control of power failure Open valve, Open valve is opened the formation natural convection loop and is played the power-failure protecting effect during power failure.But realize the power-failure protecting effect by power failure Open valve control, not only increase cost, and influence the power-failure protecting function in valve corrosion, seepage, fault such as be not closed completely when taking place and normally bring into play.

The utility model content

The technical problems to be solved in the utility model be existing combined-circulation industry water pipe boiler exist power failure the time open the formation natural convection loop by Open valve is set; realize the power-failure protecting effect; not only increase cost, and failsafe valve influence the deficiency that the power-failure protecting function is normally brought into play when taking place.

For solving the problems of the technologies described above, technical solution adopted in the utility model is: part-structures such as existing forced circulation boiler combustion apparatus, furnace wall steelframe are constant substantially, the distributive pipe that is not heated is arranged outside the boiler body burner hearth, its forward part water pipe two ends respectively with upper drum and the solid welding of homonymy next part case, its left and right part water pipe two ends respectively with boiler top collection case, the solid welding of homonymy next part case, its water pipe two ends, rear section respectively with the solid welding of the upper and lower collection case of homonymy.

The utility model compared with the prior art, because only design has the distributive pipe that is not heated outside the boiler body burner hearth, and need not valve control, also need not valve control subsidiary loop, whether no matter distributive pipe have a power failure leads to all the time, distributive pipe is born the conveying of part working-medium water to alleviate resistance to water-flow in the boiler body water screen tube during working-medium water forced circulation, and distributive pipe is totally consistent with the working-medium water flow path direction in the boiler body water screen tube; The interior working-medium water of distributive pipe is always cold water during power failure; working-medium water is a hot water in the boiler body water screen tube; hot and cold water density difference causes in the distributive pipe in the working-medium water and boiler body water screen tube the working-medium water flow path direction totally opposite, distributive pipe with corresponding boiler body water screen tube, collect case or drum accordingly and form a plurality of natural convection loops and play the power-failure protecting effect.Its advantage is that the forced circulation of working medium and the conversion of Natural Circulation need not valve control and subsidiary loop, has reduced cost, and natural convection loop does not have the failsafe valve influence, and the power-failure protecting function is able to normal performance.

Description of drawings

But Fig. 1 is a power-failure protecting forced circulation hot water Industrial Boiler right side cross section view;

But Fig. 2 cuts open zoomed-in view for power-failure protecting forced circulation hot water Industrial Boiler at Fig. 1 C-C.

The specific embodiment

Provide the utility model most preferred embodiment below in conjunction with accompanying drawing: existing forced circulation boiler combustion apparatus, part-structures such as furnace wall steelframe are constant substantially, the distributive pipe that is not heated is arranged outside the boiler body burner hearth, its forward part water pipe 1 two ends respectively with upper drum 2 and 3 solid weldings of homonymy next part case, its right half water pipe 4 two ends respectively with boiler

top collection case

5,6 solid weldings of homonymy next part case, its rear section water pipe 7 two ends respectively with upper and

lower collection case

8,9 solid weldings of homonymy, its left half water pipe structure connected mode is with the right side symmetry.

Distributive pipe

1,4,7 and left half pipe inner wall are welded with annular throttle 10.

Distributive pipe

1,4,7 and left half water pipe material are the 20# steel pipe.

Distributive pipe

1,4,7 is born the conveying of part working-medium water during the working-medium water forced circulation, and

distributive pipe

1,4,7 and boiler body front water wall pipe 11, right water screen tube 12, the working-medium water flow path direction in the rear arched tube 13 are totally consistent; Distributive pipe 1 during power failure; 4; working-medium water is always cold water in 7; boiler body front water wall pipe 11; right water screen tube 12; working-medium water in the rear arched tube 13 is a hot water; hot and cold water density difference causes distributive pipe 1; 4; working-medium water and boiler body front water wall pipe 11 in 7; right water screen tube 12; the working-medium water flow path direction is totally opposite in the rear arched tube 13; distributive pipe 1 and front water wall pipe 11; collection case 3; drum 2; connecting leg 14 forms natural convection loop; distributive pipe 4; the right water screen tube 12 of boiler body; next part case 6; top collection case 5 forms natural convection loop; distributive pipe 7; boiler body rear arched tube 13; on; next part case 8; 9 form natural convection loop; left part is identical with the right part symmetry, plays the power-failure protecting effect.10 of throttles are regulated working medium flow matching effect in distributive pipe and each water screen tube of boiler body.

Claims

1. but power-failure protecting forced circulation hot water Industrial Boiler; it is made up of boiler combustion equipment, boiler setting steelframe, boiler body; it is characterized in that: the distributive pipe that is not heated is arranged outside burner hearth; its forward part water pipe two ends respectively with upper drum and the solid welding of homonymy next part case; its left and right part water pipe two ends respectively with boiler top collection case, the solid welding of homonymy next part case, its water pipe two ends, rear section respectively with the solid welding of the upper and lower collection case of homonymy.

2. but power-failure protecting forced circulation hot water Industrial Boiler according to claim 1, it is characterized in that: described distributive pipe inwall is welded with the annular throttle.