CN2402957Y

CN2402957Y - Shell type pressure intermediate hot medium hot water boiler

Info

Publication number: CN2402957Y
Application number: CN 99216378
Authority: CN
Inventors: 周占魁; 李之光; 王化臣
Original assignee: ENGINEERING INSTALLATION GROUP PLA SHENYANG REGION JOINT LOGISTICS DEPARTMENT
Current assignee: ENGINEERING INSTALLATION GROUP PLA SHENYANG REGION JOINT LOGISTICS DEPARTMENT
Priority date: 1999-07-09
Filing date: 1999-07-09
Publication date: 2000-10-25
Anticipated expiration: 2009-07-09

Abstract

The utility model relates to a shell type pressure intermediate hot medium hot water boiler using steam as the intermediate medium for the second heat exchange, and is characterized in that on the basis of a pressure steam boiler composed of a boiler barrel, a dropping pipe, a rising pipe, a collecting tank and a screw thread smoke pipe, a condensing heat exchanger is arranged in the steam space of the boiler barrel and is composed of U-shaped pipes and a returning water supplying distribution collecting tank, a plurality of lines of U-shaped pipes are welded on the pipe plate of the returning water supplying distribution collecting tank, then are welded together with the boiler barrel and at last are fixed in the boiler. All sealing surfaces are sealed tightly.

Description

Pan shell type has the intermediate heat of pressure medium hot-water boiler

The utility model relates to a kind of pan shell type that carries out secondary heat exchange as intermediate medium with steam the intermediate heat of pressure medium hot-water boiler, belongs to the boiler class.

Existing hot-water boiler generally all is a heat exchange, fuel is emitted heat in the burner hearth internal combustion, carry out radiation heat transfer by the boiler radiation heating-surface, convection heating surface carries out heat convection, and the backwater that makes heating system is through the boiler heating, send into heating system again, therefore the quantity of circulating water that enters this boiler is very big, if water quality is poorer slightly, the boiler heating surface inwall is easy to scaling, even causing drum internal cause scaling too much and bulge, pipe internal cause scaling is too much and plugging, booster; A kind of phase transition of vacuum hot-water boiler is arranged, though be the method that adopts secondary heat exchange, owing to boiler is the negative pressure operation, the low parameter series that does not satisfy hot-water boiler of the supply and return water temperature of boiler requires strictness, complicated operation to vacuum in the stove.

The utility model has the intermediate heat of pressure medium hot-water boiler at the problems referred to above for the user provides a kind of pan shell type, and it can make boiler remain efficient operation, again because of it is low to water quality requirement, the heating surface non-scaling improves the boiler safety performance.

Task of the present utility model is finished as follows: having on the steam boiler of the pressure basis of constituting with drum, down-comer, tedge, collection case, threaded flue, in the air space of drum, install condensing heat exchanger, this condensing heat exchanger is formed by U type pipe with for backwater allocation set case, number row U type pipe is welded on the tube sheet that supplies backwater allocation set case, welded together with drum simultaneously then, U type pipe is fixing in drum, and each sealing surface requires sealing tight.

The utility model is based on shell the steam boiler of pressure to be arranged, the installing condensing heat exchanger constitutes in the air space of drum, water carries out along evaporating → condense circulation under the heat transfer boundary condition of fuel and condensing heat exchanger in the boiler, heating system backwater in the Tube Sheet of Heat Exchanger makes water temperature reach design temperature output after the heat of condensation of having accepted steam, the water yield in the boiler remains unchanged substantially, use the underproof water of water quality also can guarantee not scaling of boiler heating surface, avoided reducing the thermal efficiency of boiler because of heating surface scale effect heat exchange; Avoided because of plugging, booster phenomenon that in-tube fouling occurs, because of the drum bulge phenomenon that fouling in the drum causes, it is overheated to have prevented that the high position wall temperature of thermic load from raising, and has increased the service life of boiler.

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:

Fig. 1 is the utility model front view

Fig. 2 is the utility model side view

With reference to accompanying drawing 1,2, with drum [1], down-comer [4], tedge [5], collection case [6], what threaded flue [7] constituted has on the steam boiler of the pressure basis, body of heater itself adopts the arch tube sheet, in the air space of drum, install condensing heat exchanger, this condensing heat exchanger is formed by U type pipe [2] with for backwater allocation set case [3], the row of number U type pipe [2] is welded on the tube sheet that supplies backwater allocation set case [3], welded together with drum simultaneously then, U type pipe is fixing in drum, each sealing surface requires sealing tight, boiler is by drum [1], down-comer [4], tedge [5], collection case [6] is formed the water-flow circuit of boiler, condensing heat exchanger is by the feed pipe for backwater allocation set case [3], the return pipe of U type pipe [2] is formed the water-flow circuit of heating system, the heating surface of boiler is formed radiation heating-surface by drum and tedge, tube bank and threaded flue are formed convection heating surface, the heating surface of condensing heat exchanger is a U type pipe, the course of work of the present utility model is such: the drum of boiler [1] hydrospace, tedge [5], down-comer [4], all fill water in the collection case [6], fuel burns in burner hearth and discharges heat, by with drum, the radiation of tedge is heated and is restrained, after the convection current of threaded flue is heated, water is become have the saturated vapor of 0.4Mpa to enter the air space of drum, steam carries out the heat exchange second time with the U type pipe of condensing heat exchanger again, after U type pipe heating system backwater has been accepted the heat of condensation of steam, after making water temperature bring up to heat supply temperature, be input to heat supply user by water circulating pump, after drum inner vapor and the heat exchange of U type pipe, because having discharged the heat of condensation has just become condensate water by steam, under the effect of gravity, got back to the hydrospace of drum again, water in the boiler just along evaporating → condense circulation repeatedly, is finished the heat transfer of intermediate heat medium.

Claims

1, a kind of pan shell type has the intermediate heat of pressure medium hot-water boiler, it is by what drum [1], down-comer [4], tedge [5], collection case [6], threaded flue [7] constituted the pressure steam boiler to be arranged, it is characterized in that: in the air space of drum, install condensing heat exchanger, this condensing heat exchanger is formed by U type pipe [2] with for backwater allocation set case [3], the row of number U type pipe [2] is welded on the tube sheet that supplies backwater allocation set case [3], welded together with drum simultaneously then, U type pipe is fixing in drum, and each sealing surface requires sealing tight.