CN113654020A

CN113654020A - Shell type oil-gas water pipe boiler adopting novel heat exchange mode

Info

Publication number: CN113654020A
Application number: CN202111060239.4A
Authority: CN
Inventors: 白鹤峰; 刘洋; 冯彦香; 何寅; 尹诵; 杜胜男
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-11-16

Abstract

The invention provides a shell type oil-gas water pipe boiler adopting a novel heat exchange mode, which comprises: a furnace body in which boiler water is arranged; the combustion chamber is used for generating flue gas with heat; the gas inlet end of the smoke chamber is communicated with the combustion chamber, and the gas outlet end of the smoke chamber is connected with the furnace body and discharges smoke; a plurality of heat exchange tubes are arranged at intervals in the smoke chamber, two ends of each heat exchange tube are connected with the smoke chamber and communicated with the outside of the smoke chamber, and boiler water flows through the heat exchange tubes; the heat exchange tube is a fin tube, the outer side of the heat exchange tube is provided with fins for increasing the heat exchange area, and the smoke enters the smoke chamber and exchanges heat with boiler water circulating in the heat exchange tube through the arrangement of the smoke chamber and the heat exchange tube with the fins, so that the smoke transversely scours the fin tube, and higher heat exchange efficiency can be obtained; the side wall of the smoke chamber is contacted with boiler water, and heat exchange can be carried out similarly, so that the heat exchange efficiency is further improved.

Description

Shell type oil-gas water pipe boiler adopting novel heat exchange mode

Technical Field

The invention relates to the technical field of boilers, in particular to a shell type oil-gas water pipe boiler adopting a novel heat exchange mode.

Background

The boiler shell boiler is an important industrial boiler product in China. Generally, it means: the fixed pressure-bearing boiler with water as medium and evaporating heating surface mainly arranged in the boiler shell or boiler shell and with boiler furnace (hearth). In a shell boiler, burning flames or flue gas flow in a pipe, and working media flow outside the pipe, and generally, the boiler is a horizontal fire-tube boiler.

The convection heating surface is a smoke tube, which is a fire tube boiler. The evaporation rate per unit area is low, the heat exchange efficiency is low, a large number of smoke tubes need to be arranged for improving the heat exchange efficiency, the manufacturing workload is large, and the problems of tube plate cracks and the like are easy to occur.

Disclosure of Invention

The invention aims to provide a shell type oil and gas water pipe boiler adopting a novel heat exchange mode, which can improve the heat exchange efficiency;

the invention provides a shell type oil-gas water pipe boiler adopting a novel heat exchange mode, which comprises:

a furnace body in which boiler water is arranged;

the combustion chamber is used for generating flue gas with heat;

the gas inlet end of the smoke chamber is communicated with the combustion chamber, and the gas outlet end of the smoke chamber is connected with the furnace body and discharges smoke;

a plurality of heat exchange tubes are arranged at intervals in the smoke chamber, two ends of each heat exchange tube are connected with the smoke chamber and communicated with the outside of the smoke chamber, and boiler water flows through the heat exchange tubes;

the heat exchange tube is a fin tube, and fins for increasing the heat exchange area are arranged on the outer side of the heat exchange tube.

In a preferred embodiment, one end of the heat exchange tube is provided with a flared opening with the diameter larger than or equal to the diameter of the fins, so that the different-diameter fin tubes with different calibers at two ends are formed, and two opposite side walls of the smoke chamber are respectively provided with mounting holes corresponding to two ends of the heat exchange tube.

In a preferred embodiment, the heat exchange tubes are arranged perpendicular to the direction of flue gas flow.

In a preferred embodiment, the heat exchange tubes are arranged in an array or staggered arrangement or a combination of the two.

In a preferred embodiment, the smoke chamber is divided into a process space and a return space by a partition plate with the extending direction consistent with the smoke flowing direction, an opening is formed in one end of the partition plate and used for communicating the process space with the return space, one end, far away from the opening, of the process space is communicated with the combustion chamber, and one end, far away from the opening, of the return space is communicated with the outside.

In a preferred embodiment, one end of the combustion chamber is connected with a burner, the other end of the combustion chamber is communicated with the smoke chamber through the combustion chamber, and the end part of the smoke chamber is provided with a blocking plate which is communicated with the furnace body through a connecting pipe.

In a preferred embodiment, the side plate of the furnace body close to the side of the combustion chamber is an ellipsoid-shaped tube plate protruding outwards.

In a preferred embodiment, the smoking chamber is circular in cross-section.

In a preferred embodiment, the smoking chamber is provided with at least two.

In a preferred embodiment, there are at least two combustion chambers, each of which has a separate smoking chamber associated therewith.

According to the technical scheme, the smoke chamber and the heat exchange tube with the fins are arranged, smoke enters the smoke chamber to exchange heat with boiler water circulating in the heat exchange tube, and the smoke transversely scours the fin tubes, so that higher heat exchange efficiency can be obtained; the side wall of the smoke chamber is contacted with boiler water, and heat exchange can be carried out similarly, so that the heat exchange efficiency is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a side view of example 1 of the present invention;

FIG. 3 is a schematic structural view of a heat exchange tube of example 1 of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a schematic view showing the installation of a heat exchange tube of example 1 of the present invention;

FIG. 6 is a schematic view showing the arrangement of heat exchange tubes of example 1 of the present invention;

FIG. 7 is a schematic view showing the installation of the partition board according to embodiment 1 of the present invention;

FIG. 8 is a schematic structural view of example 2 of the present invention;

FIG. 9 is a schematic structural view of example 3 of the present invention;

FIG. 10 is a schematic structural view of an embodiment of example 4 of the present invention;

FIG. 11 is a schematic structural view of another embodiment of example 4 of the present invention;

FIG. 12 is a schematic structural view of example 5 of the present invention;

FIG. 13 is a schematic view of the connection between the smoke chamber and the oven body according to the present invention;

description of reference numerals:

1. a furnace body; 2. a combustion chamber; 3. a flashback chamber; 4. a smoking chamber; 5. a heat exchange pipe; 6. an ellipsoidal tube sheet; 7. flaring; 8. a partition plate; 9. a blocking plate; 10. and (4) connecting the pipes.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

as shown in fig. 1 to 7, the present invention provides a shell-type oil-gas water tube boiler using a novel heat exchange method, which is a horizontal boiler, and comprises:

the boiler body 1 is internally provided with boiler water, is provided with a water inlet and a steam outlet (water outlet) and is connected with steam (water) utilization equipment;

the combustion chamber 2 extends in the same direction as the furnace body 1, namely is transversely arranged and is used for generating flue gas with heat; the combustion chamber 2 is arranged inside the furnace body 1;

a smoke chamber 4, the air inlet end of which is communicated with the combustion chamber 2, and the air outlet end of which is connected with the furnace body 1 and discharges smoke; the fuel is fully combusted in the combustion chamber 2, the smoke generating heat by combustion enters the smoke chamber 4 to exchange heat with boiler water so as to heat the boiler water, and the extending direction of the smoke chamber 4 is consistent with the extending direction of the combustion chamber 2;

the heat exchange tubes 5 are arranged in the smoke chamber 4 at intervals, two ends of each heat exchange tube are connected with the smoke chamber 4 and communicated with the outside of the smoke chamber 4, boiler water flows through the heat exchange tubes, boiler water flowing through the heat exchange tubes 5 is heated by smoke in the smoke chamber 4, the design mode of a traditional boiler is changed, the traditional boiler is that the smoke enters the smoke tube to heat the boiler water positioned on the outer side of the smoke tube, the smoke enters the smoke chamber 4 to heat the boiler water positioned in the smoke tube, the amount of the smoke heated at the same time is increased, and the surface area of the boiler water in contact with a heat source is increased; boiler water is divided into a plurality of strands to enter the heat exchange tubes 5, the water with the same volume is divided into a plurality of strands to be heated simultaneously, the heating is faster than the heating by stacking together, and the outer surface of the smoke chamber 4 is also contacted with the boiler water and can also be subjected to heat transfer, so that the heat exchange efficiency is further increased.

The heat exchange tube 5 is a fin tube, fins for increasing the heat exchange area are arranged on the outer side of the fin tube, the fins and the heat exchange tube 5 are integrally arranged and rolled, the fins are arranged on the outer side of the heat exchange tube at intervals, the extending direction of the fins is perpendicular to the extending direction of the heat exchange tube 5, and the heat exchange efficiency is further increased.

One end of the combustion chamber 2 is connected with the burner, the other end is communicated with the smoke chamber 4 through the combustion chamber 3, as shown in fig. 13, the end part of the smoke chamber 4 is provided with a blocking plate 9, and the blocking plate 9 is communicated with the furnace body 1 through a connecting pipe 10.

The smoke chamber 4 can be arranged above the combustion chamber 2, and can also be arranged at the side of the combustion chamber 2, and the arrangement at the side has the advantages that: longer heat exchange tubes 5 can be arranged, the height size of the smoke chamber 4 is increased, and more convection heating surfaces are obtained. The smoke chamber 4 is rectangular in cross section.

As shown in fig. 3-5, one end of the heat exchange tube 5 is provided with a flared opening 7 whose diameter is greater than or equal to the diameter of the fins, the flared opening 7 may be cylindrical or conical to form a different-diameter fin tube with different calibers at both ends, the two opposite side walls of the smoke chamber 4 are respectively provided with mounting holes corresponding to both ends of the heat exchange tube 5, i.e., one end corresponds to the original diameter of the heat exchange tube and the other end corresponds to the flared opening 7, one end of the original diameter of the heat exchange tube 5 is placed into the smoke chamber 4 from the mounting hole corresponding to the flared opening 7 and connected with the corresponding mounting hole, and both ends of the heat exchange tube 5 are hermetically connected with the mounting holes. Because the heat exchange tube 5 has fins outside, if the method for assembling the heat exchange tube with the different-diameter fins is not adopted, the upper steel plate of the smoke chamber 4 cannot be welded, the heat exchange tube 5 with the fins is assembled in the smoke chamber 4, and then the upper steel plate of the smoke chamber 4 is assembled, so that a lot of inconvenience is brought, therefore, the concept of the different-diameter fin tube is provided, namely, one end of the different-diameter fin tube is made into a normal heat exchange tube 5, the other end of the different-diameter fin tube is made into a pattern with a diameter which is slightly larger than the outer diameter of the fins (1-2mm), and the method for manufacturing the different-diameter fin tube can be adopted: 1. rolling a finned tube, removing a section of fin by a specified length, and then directly flaring one end to form the reducing finned tube. The direct flared reducing finned tube needs special mechanical equipment, and the manufacturing cost is likely to be increased. 2. Therefore, a method for manufacturing the welded different-diameter finned tube is provided, the manufacturing method comprises the steps of manufacturing a flaring 7, welding the flaring 7 and the heat exchange tube 5 together by adopting a welding method, and installing the flaring 7 in the smoke chamber 4 after the welding is qualified, so that the manufacturing of the flaring 7 can be completed only by using relatively small equipment.

The heat exchange tubes 5 are arranged perpendicular to the flowing direction of the flue gas, and the flue gas longitudinally scours the convection tube bundles to fully utilize the heating surface, so that the heat efficiency of the boiler is improved, and the temperature and the pressure are increased quickly; and is beneficial to water circulation; the pressure bearing capacity of the smoke chamber 4 is improved.

As shown in fig. 6, the heat exchange tubes 5 are arranged in an array manner or in a staggered manner or in a combination manner, and the array type flow rate is the fastest and the flow direction is a straight line according to the requirements of the boiler design on the number of tubes on the convection heating surface of the boiler, the flow rate of flue gas and the flow direction adjustment; the flow speed is slow in the staggered arrangement, the flow direction is the cross flow direction, the retention time of the smoke in the smoke chamber 4 is prolonged, and the heat exchange is sufficient.

As shown in fig. 7, the smoke chamber 4 is divided into a process space (a second return stroke) and a return space (a third return stroke) by a partition plate 8 having an extending direction identical to the smoke flowing direction, the partition plate 8 is provided in a direction identical to the extending direction of the heat exchange tube 5, one end of the partition plate 8 is provided with an opening for communicating the process space and the return space, one end of the process space, which is far away from the opening, is communicated with the combustion chamber 2, and one end of the return space, which is far away from the opening, is communicated with the outside. At the moment, the flue gas enters the process space from the combustion chamber 2, then enters the return space through the opening, and is discharged out of the furnace body 1, so that the three-return boiler is formed.

Example 2:

as shown in fig. 8, on the basis of embodiment 1, the side plate of the furnace body 1 near the side of the flashback chamber 3 is an ellipsoid-shaped tube plate 6 protruding outwards. The flat tube sheet that this side of general boiler used, in order to guarantee the intensity of boiler, need install oblique stay and straight brace additional, this application has used ellipsoid tube sheet 6, can reduce even need not to brace to one side and reduce straight brace like this.

Example 3:

as shown in fig. 9, in example 1, the smoke chamber 4 has a circular cross section. The benefits of such an arrangement are: the circular smoking chamber 4 is convenient to manufacture. The heat exchange tubes 5 in the circular smoke chamber 4 are provided with heat exchange tubes 5 with different heights according to different circular up-down spacing requirements.

Example 4:

on the basis of the embodiment 1, at least two smoke chambers 4, preferably two smoke chambers 4 are arranged on two sides above the combustion chamber 2, and the bottom parts of the smoke chambers are not required to be arranged above the top point of the combustion chamber 2, so that the height size of the smoke chambers 4 can be increased, longer heat exchange pipes 5 can be arranged conveniently, and more convection heating surfaces can be obtained. The smoking chamber 4 may be arranged in a normal horizontal orientation, as shown in fig. 10; the device can also be obliquely arranged, as shown in fig. 11, the space in the shell can be more fully utilized, and the steel consumption of the whole machine is saved.

Example 5:

as shown in fig. 12, in addition to embodiment 1, at least two, preferably two combustion chambers 5 are provided, each combustion chamber 5 is connected with a separate smoke chamber 4, which is suitable for large boilers, and can obtain more convection heating surfaces required by the large boilers.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an adopt pot type fuel gas water pipe boiler of novel heat transfer mode which characterized in that includes:

a furnace body in which boiler water is arranged;

the combustion chamber is used for generating flue gas with heat;

2. The pot type oil and gas water pipe boiler adopting the novel heat exchange mode as claimed in claim 1, wherein one end of the heat exchange pipe is provided with a flared opening with a diameter larger than or equal to that of the fin, a reduced-diameter fin pipe with two different end diameters is formed, and mounting holes corresponding to two ends of the heat exchange pipe are respectively arranged on two opposite side walls of the smoke chamber.

3. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode as claimed in claim 1, wherein the heat exchange pipe is arranged perpendicular to the flow direction of the flue gas.

4. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode as claimed in claim 1, wherein the heat exchange pipes are arranged in an array manner or in a staggered manner or in a combination manner.

5. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode as claimed in claim 1, wherein the smoke chamber is divided into a process space and a return space by a partition plate with the extending direction consistent with the smoke flowing direction, an opening is formed in one end of the partition plate and used for communicating the process space with the return space, one end, far away from the opening, of the process space is communicated with the combustion chamber, and one end, far away from the opening, of the return space is communicated with the outside.

6. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode according to any one of claims 1 to 5, wherein one end of the combustion chamber is connected with a burner, the other end of the combustion chamber is communicated with the smoke chamber through the combustion chamber, the end part of the smoke chamber is provided with a blocking plate, and the blocking plate is communicated with the boiler body through a connecting pipe.

7. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode as claimed in claim 6, wherein a side plate of one side of the boiler body close to the combustion chamber is an outwards-protruded ellipsoidal tube plate.

8. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode as claimed in claim 6, wherein the section of the smoke chamber is circular.

9. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode is characterized in that at least two smoke chambers are arranged.

10. The shell type oil and gas water pipe boiler adopting the novel heat exchange mode is characterized in that at least two combustion chambers are arranged, and each combustion chamber is connected with a single smoke chamber.