CN206176320U - Pressure -bearing flue formula exhaust -heat boiler - Google Patents

Abstract

The utility model provides a pressure -bearing flue formula exhaust -heat boiler, includes the casing and arranges its inside heat exchange tube in, the casing is circular cross section gyration shell, and concentrated pipe, heat exchange tube and liquid package are installed on earth in proper order to its inside top of following, casing outside top installation steam pocket, divide into independent ascending cavity and decline cavity by the baffle in the concentrated pipe, the steam pocket pass through the tedge nest of tubes, the downtake nest of tubes respectively with the ascending cavity of concentrated pipe and decline cavity intercommunication, and corresponding ascending heat exchange tube and the decline heat exchange tube of being divided into of heat exchange tube, the last lower extreme of the heat exchange tube that rises respectively with concentrated pipe the rise bottom of cavity and the upper end intercommunication of liquid package, the last lower extreme of decline heat exchange tube feeds through with the upper end that the bottom and the liquid of concentrated pipe decline cavity wrapped respectively. The utility model is suitable for a technology gas has certain pressure and the strict occasion of pressure drop.

Description

A kind of pressure-bearing flue type waste heat boiler

Technical field this utility model is related to the waste heat boiler technical field of Natural Circulation, and in particular to one kind is applied to shell Journey process gas have the pressure-bearing flue type waste heat boiler of certain pressure and the strict occasion of drop requirements.

Background technology

Waste heat boiler is the common device for being used in pressure recovery gas high-temperature residual heat in commercial plant.The type of waste heat boiler Formula can be divided into the flow region according to WATER AS FLOW MEDIUM：Chimney flue type water-tube boiler and shell-and-tube multitubular boiler.The advantage of water-tube boiler：Gas Flow outside body pipe, it is easy to augmentation of heat transfer；Resistance drop is little after compact conformation, saving device fabrication material, processing medium heat exchange；Lack Point：Housing is generally using square shell, and its bearing capacity is poor, is generally used for shell side medium for normal pressure（Below gauge pressure 0.1MPa）Or it is micro- negative , in the case where thermic load is big, easily there is heat exchanger tube booster in the occasion of pressure（Water is all vaporized in pipe, overtemperature of tube wall）Phenomenon. The advantage of multitubular boiler：Pressure of equipment ability is high, it is possible to use in occasion of the processing medium with certain pressure, shortcoming：Gas Bottomhole pressure, it is difficult to augmentation of heat transfer, device fabrication consumption of materials is big, processing medium resistance drop is big.For this purpose, conventional chimney flue type water Pipe boiler is limited by its bearing capacity, it is difficult to have the strict occasion of certain pressure and drop requirements for process gas.

Utility model content

This utility model provides a kind of pressure-bearing flue type waste heat boiler, it is adaptable to which process gas have certain pressure and pressure drop will Seek strict occasion.

The technical scheme that this utility model is adopted for：

A kind of pressure-bearing flue type waste heat boiler, including the heat exchanger tube in housing and portion disposed within, the housing cuts for circular Shell is turned round in face, installs collecting tubule, heat exchanger tube and liquid bag inside it successively from the top to bottom；Hull outside top is installed by drum；It is described Collecting tubule inner route clapboard is divided into independent rising chamber and declines chamber；The drum passes through tedge pipe group, down-comer pipe group Respectively with the rising chamber and decline chamber of collecting tubule；And heat exchanger tube is divided into accordingly rising heat exchanger tube and declines heat exchange Pipe, the upper end of bottom and liquid bag that the upper and lower side for rising heat exchanger tube rises chamber with collecting tubule respectively connects, and declines heat exchanger tube The upper end of bottom and liquid bag that upper and lower side declines chamber with collecting tubule respectively connects.

The cylinder of the drum, liquid bag and housing three is axially identical.

The enclosure interior is provided with shunt valve, and on the shunt valve of hull outside valve assembly is arranged.

The beneficial effects of the utility model：This utility model has certain pressure suitable for process gas and drop requirements are strict Occasion.

Description of the drawings

Fig. 1 is this utility model front view；

Fig. 2 is the side view of Fig. 1；

Fig. 3 is this utility model water circulation schematic diagram；

Fig. 4 is that this utility model heat-exchanging tube bundle arranges schematic top plan view.

Specific embodiment

This utility model is further described below in conjunction with the accompanying drawings.

With reference to Fig. 1,2, a kind of pressure-bearing flue type waste heat boiler, including the heat exchanger tube in housing and portion disposed within, the shell Body 1 is that circular cross-section turns round shell, installs collecting tubule 5, heat exchanger tube 2 and liquid bag 4 inside it successively from the top to bottom；Housing 1 is provided with Import and export, and import and export two ends and baffle plate 8 is installed.The outside of housing 1 top is installed by drum 3；10 points of 5 inner route clapboard of the collecting tubule For independent rising chamber and decline chamber；Rise chamber and flow through water and steam, decline chamber and flow only through water.The drum 3 leads to Cross tedge pipe group 6, down-comer pipe group 7 to connect with chamber welding is declined with the rising chamber of collecting tubule 5 respectively；And 2 phases that exchange heat That what is answered is divided into two parts, is to rise heat exchanger tube and decline heat exchanger tube, rises heat exchanger tube in intermediate arrangement, and both sides are to decline heat exchange Pipe, the upper and lower side for rising heat exchanger tube is connected respectively with the bottom of the first chamber of collecting tubule 5 and the upper end welding of liquid bag 4, and decline is changed The upper and lower side of heat pipe is connected respectively with the bottom of the second chamber of collecting tubule 5 and the upper end welding of liquid bag 4.

The cylinder of the drum 3, liquid bag 4 and the three of housing 1 is axially identical.Common chimney flue type is drum（Liquid bag）Center Axle is mutually perpendicular to, and heat exchanger tube passes through external shell, with drum（Liquid bag）Connection；In the larger occasion of shell side rate-of flow, bank of tubes number Increase causes drum hole row region or angle excessive, and the bearing capacity and sealing reliability to structure weakens obvious；In being changed to The heart is axially identical, and equipment top or bottom increase manifold structure, reduce the weakening of shell aperture row, and bank of tubes number can be according to heat exchange Demand and drum length adjustment, effectively improve reliability.

Shunt valve 9 is provided with inside the housing 1, valve assembly is set on the shunt valve 9 outside housing 1.According to need Want scalable shell side medium outlet temperature.

This utility model forms water by heat exchanger tube 2, drum 3, liquid bag 4, collecting tubule 5, tedge pipe group 6, down-comer pipe group 7 Closed circuit.When process gas flow through 1 zone line of housing, the water in heat exchanger tube 2 is heated so as to be vaporizated into after steam and flow through first It is excessive that first chamber, tedge pipe group 6 in heat exchanger tube, collecting tubule 5 reaches 3 one-tenth saturated vapors of drum；And in drum 3 in steam The water of entrainment flows through second chamber, the formation circulation of the second heat exchanger tube arrival liquid bag 4 in down-comer pipe group 7, collecting tubule 5.

Claims (3)

1. a kind of pressure-bearing flue type waste heat boiler, including the heat exchanger tube in housing and portion disposed within, it is characterised in that：The housing （1）Shell is turned round for circular cross-section, collecting tubule is installed successively from the top to bottom inside it（5）, heat exchanger tube（2）And liquid bag（4）；Housing （1）Outside top is installed by drum（3）；The collecting tubule（5）Inner route clapboard（10）It is divided into independent rising chamber and declines chamber； The drum（3）By tedge pipe group（6）, down-comer pipe group（7）Respectively and collecting tubule（5）Rising chamber and decline chamber Connection；And heat exchanger tube（2）Be divided into accordingly rising heat exchanger tube and decline heat exchanger tube, rise heat exchanger tube upper and lower side respectively and set Pipe（5）Rise bottom and the liquid bag of chamber（4）Upper end connection, decline the upper and lower side of heat exchanger tube respectively and collecting tubule（5）Decline The bottom of chamber and liquid bag（4）Upper end connection.

2. a kind of pressure-bearing flue type waste heat boiler according to claim 1, it is characterised in that：The drum（3）, liquid bag （4）And housing（1）The cylinder of three is axially identical.

3. a kind of pressure-bearing flue type waste heat boiler according to claim 1, it is characterised in that：The housing（1）Inside sets There is shunt valve（9）, housing（1）The outside shunt valve（9）Upper setting valve assembly.