Small vertical low-pressure heater for mobile generator set

Abstract

A small-sized vertical low-pressure heater for a mobile generator set belongs to the technical field of heating devices, and aims to solve the problem that an existing low-pressure heater cannot adapt to the arrangement form of equipment in the mobile generator set, the low-pressure heater comprises a water chamber, a pipe system and a shell, the pipe system is inserted in the shell, and the water chamber is provided with a water outlet. The water chamber is arranged at the top of the pipe system, the water chamber, the pipe system and the shell are detachably connected through a plurality of bolt assemblies, a water inlet pipe and a water outlet pipe are arranged on the water chamber, the water outlet end of the water inlet pipe and the water inlet end of the water outlet pipe are both communicated with the water chamber, a steam inlet pipe is arranged on the upper portion of the outer side wall of the shell, and the axis of the steam inlet pipe is perpendicular to the axis of the shell. The steam outlet end of the steam inlet pipe communicates with the shell, a drain pipe is arranged in the center of the bottom end of the shell, and the water inlet end of the drain pipe communicates with the shell. The low-pressure heater structure is mainly used in the mobile generator set.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating devices, and in particular relates to a small vertical low-voltage heater for a mobile generator set. Background Art

[0002] The low-pressure heater is a heat exchange device that uses the low-pressure steam extraction of the steam turbine to heat the condensate of the system to improve the economy of the generator set. Usually, the low-pressure heater of large generator sets adopts a horizontal structure, and the low-pressure heater of small and medium-sized generator sets adopts a vertical structure. Generator sets below 10MW generally do not have a low-pressure heat recovery system and no low-pressure heater. With the development of the market, there is a demand for a mobile generator set that highly integrates all equipment related to the steam turbine generator set, such as the steam turbine, generator, condenser, heater, various pumps and valves, into a small module, which can be transported and disassembled as a whole, so that the size of the unit is very limited. As an important equipment in the heat recovery system of the generator set, the low-pressure heater needs to be able to adapt to the layout requirements of the mobile generator set. Therefore, it is necessary to study a low-pressure heater that can reduce the overall size, has a simple and compact structure, and is easy to disassemble and maintain. Utility Model Content

[0003] In order to solve the problem that the existing low-voltage heater cannot adapt to the equipment layout form in the mobile generator set, the utility model provides a small vertical low-voltage heater for the mobile generator set;

[0004] A small vertical low-pressure heater for a mobile generator set, the low-pressure heater comprising a water chamber, a pipe system and a shell, the pipe system is inserted in the shell, the water chamber is arranged on the top of the pipe system, and the water chamber, the pipe system and the shell are detachably connected by a plurality of bolt assemblies, a water inlet pipe and a water outlet pipe are arranged on the water chamber, and the water outlet end of the water inlet pipe and the water inlet end of the water outlet pipe are both connected to the water chamber, a steam inlet pipe is arranged on the upper part of the outer side wall of the shell, and the axis of the steam inlet pipe is arranged perpendicular to the axis of the shell, the steam outlet end of the steam inlet pipe is connected to the shell, a drain pipe is arranged at the center of the bottom end of the shell, and the water inlet end of the drain pipe is connected to the shell;

[0005] The pipe system includes a tube sheet, a tube bundle and a plurality of steam retaining pipes. The tube bundle is inserted on the tube sheet, and the tube bundle and the tube sheet are connected. The plurality of steam retaining pipes are interspersed in the tube bundle, and the plurality of steam retaining pipes are fixedly connected to the tube sheet. The tube sheet, the water chamber and the shell are detachably connected by a plurality of bolt assemblies.

[0006] Further, the water chamber comprises a water chamber flange, a water chamber cylinder and a flow partition, the top end of the water chamber cylinder is a closed end, the bottom end of the water chamber cylinder is an open end, the open end of the water chamber cylinder is buckled on the water chamber flange, and the water chamber cylinder is fixedly connected to the water chamber flange, the flow partition is arranged in the water chamber cylinder, and the flow partition is fixedly connected to the water chamber cylinder and the water chamber flange, and the flow partition adopts a criss-cross structure matching the tube bundle;

[0007] Furthermore, the shell comprises a shell flange and a shell-side cylinder, the top end of the shell-side cylinder is an open end, the bottom end of the shell-side cylinder is a closed end, the shell flange is arranged on the open end of the shell-side cylinder, and the shell flange is fixedly connected to the shell-side cylinder;

[0008] Further, the tube bundle is an eight-pass tube bundle;

[0009] Further, the number of the steam retaining pipes is 6, 4 of the 6 steam retaining pipes are equidistantly arranged in the shell-side cylinder along the axial extension direction of the steam inlet pipe, and each of the 4 steam retaining pipes is correspondingly arranged between the pipelines of two adjacent processes in the eight-process tube bundle, and the remaining 2 of the 6 steam retaining pipes are relatively arranged on the outside of the tube bundle along the axial extension direction of the steam inlet pipe, and the remaining 2 steam retaining pipes are both arranged on the shell-side cylinder diameter arranged perpendicular to the axis of the steam inlet pipe, the axis of each steam retaining pipe is arranged perpendicularly to the tube sheet, and the top end of each steam retaining pipe is fixedly connected to the bottom end of the tube sheet;

[0010] Furthermore, a plurality of connecting through holes are processed at equal intervals along the circumferential direction at the edge of the top end of the tube sheet, and each connecting through hole is coaxially arranged with a connecting hole on the water chamber flange and a connecting hole on the shell flange. The bolts in each bolt assembly pass through a connecting hole on the water chamber flange, a connecting through hole and a connecting hole on the shell flange in sequence and are inserted into nuts in the same bolt assembly, and the bolts are threadedly connected to the nuts for disassembly.

[0011] Furthermore, two ear-type supports are equidistantly arranged on the outer ring wall of the shell-side cylinder along the circumferential direction, and each ear-type support is fixedly connected to the shell-side cylinder:

[0012] The beneficial effects of this application compared to the prior art are as follows:

[0013] The present application proposes a small vertical low-pressure heater for a mobile generator set. Compared with the existing low-pressure heaters, it adopts a small-diameter U-tube 8 flow layout structure, which can effectively shorten the overall height of the low-pressure heater, reduce the equipment's external dimensions, and better adapt to the needs of mobile generator sets. At the same time, in the technical solution of the present application, a steam-blocking pipe is arranged in the piping structure. The steam-blocking pipe is welded to the tube sheet and serves as a piping support pipe at the same time, reducing internal connectors, making the equipment structure simple and compact, simplifying the production and manufacturing process, improving processing efficiency, and saving manufacturing costs. In the solution of the present application, the water chamber, piping system, and shell are connected in a flange-coupled manner with multiple bolt assemblies. This connection method can ensure reliable connection while facilitating disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the low-pressure heater of the utility model;

[0015] Figure 2 yes Figure 1 AA view in the figure;

[0016] Figure 3 yes Figure 1 BB view in the figure;

[0017] In the figure, 1 is a water chamber, 1-1 is a water chamber flange, 1-2 is a water chamber cylinder, 1-3 is a partition plate, 2 is a pipe system, 2-1 is a tube sheet, 2-2 is a tube bundle, 2-3 is a steam retaining pipe, 3 is a shell, 3-1 is a shell flange, 3-2 is a shell cylinder, 4 is an ear support, 5 is a bolt assembly, 6 is a water inlet pipe, 7 is a water outlet pipe, 8 is a steam inlet pipe and 9 is a drain pipe. DETAILED DESCRIPTION

[0018] Specific implementation method 1: Combination Figures 1 to 3 The present embodiment is described. In the present embodiment, a small vertical low-pressure heater for a mobile generator set is provided, characterized in that: the low-pressure heater comprises a water chamber 1, a pipe system 2 and a shell 3, the pipe system 2 is inserted in the shell 3, the water chamber 1 is arranged on the top of the pipe system 2, and the water chamber 1, the pipe system 2 and the shell 3 are detachably connected by a plurality of bolt assemblies 5, a water inlet pipe 6 and a water outlet pipe 7 are arranged on the water chamber 1, and the water outlet end of the water inlet pipe 6 and the water inlet end of the water outlet pipe 7 are both connected to the water chamber 1, a steam inlet pipe 8 is arranged on the upper part of the outer wall of the shell 3, and the axis of the steam inlet pipe 8 is arranged perpendicular to the axis of the shell 3, the steam outlet end of the steam inlet pipe 8 is connected to the shell 3, a drain pipe 9 is arranged at the center of the bottom end of the shell 3, and the water inlet end of the drain pipe 9 is connected to the shell 3;

[0019] The pipe system 2 includes a tube sheet 2-1, a tube bundle 2-2 and a plurality of steam retaining pipes 2-3. The tube bundle 2-2 is inserted into the tube sheet 2-1, and the tube bundle 2-2 is connected to the tube sheet 2-1. The plurality of steam retaining pipes 2-3 are inserted into the tube bundle 2-2, and the plurality of steam retaining pipes 2-3 are fixedly connected to the tube sheet 2-1. The tube sheet 2-1, the water chamber 1 and the shell 3 are detachably connected by a plurality of bolt assemblies 5.

[0020] In this embodiment, a plurality of steam retaining pipes 2-3 are arranged in the pipe system 2. The steam retaining pipes 2-3 are welded to the tube sheet 2-1 and serve as support pipes of the pipe system 2, thereby effectively reducing the number of connectors inside the pipe system 2, making the equipment structure simple and compact, simplifying the production and manufacturing process, improving the processing efficiency, and saving the manufacturing cost.

[0021] Specific implementation method 2: Combination Figures 1 to 3This embodiment is described. The difference between this embodiment and the first embodiment is that the water chamber 1 includes a water chamber flange 1-1, a water chamber cylinder 1-2 and a partition plate 1-3. The top end of the water chamber cylinder 1-2 is a closed end, and the bottom end of the water chamber cylinder 1-2 is an open end. The open end of the water chamber cylinder 1-2 is buckled on the water chamber flange 1-1, and the water chamber cylinder 1-2 is fixedly connected to the water chamber flange 1-1. The partition plate 1-3 is arranged in the water chamber cylinder 1-2, and the partition plate 1-3 is fixedly connected to the water chamber cylinder 1-2 and the water chamber flange 1-1. The partition plate 1-3 adopts a crisscross structure that matches the tube bundle 2-2. Other components and connection methods are the same as those of the first embodiment.

[0022] In this embodiment, the design of the partition plate 1-3 can effectively distinguish the working area of ​​the water chamber cylinder 1-2, ensuring that the incoming water can work stably along the predetermined process of the tube bundle 2-2.

[0023] Specific implementation method three: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the second embodiment is that the shell 3 includes a shell flange 3-1 and a shell-side cylinder 3-2, the top end of the shell-side cylinder 3-2 is an open end, the bottom end of the shell-side cylinder 3-2 is a closed end, the shell flange 3-1 is arranged on the open end of the shell-side cylinder 3-2, and the shell flange 3-1 is fixedly connected to the shell-side cylinder 3-2. Other components and connection methods are the same as those of the second embodiment.

[0024] Specific implementation method four: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the third embodiment is that the tube bundle 2-2 is an eight-pass tube bundle. The other components and connection methods are the same as those of the third embodiment.

[0025] In this embodiment, the traditional six-pass tube bundle is optimized into a small-diameter U-shaped tube eight-pass arrangement structure, which can effectively shorten the overall height of the low-pressure heater, reduce the overall dimensions of the equipment, and better meet the needs of mobile generator sets.

[0026] Specific implementation method five: Combination Figures 1 to 3This embodiment is described. The difference between this embodiment and the fourth embodiment is that there are six steam retaining pipes 2-3. Four of the six steam retaining pipes 2-3 are arranged in the shell-side cylinder 3-2 in sequence and equidistantly along the axial extension direction of the steam inlet pipe 8, and each of the four steam retaining pipes 2-3 is arranged correspondingly between the pipelines of two adjacent processes in the eight-process tube bundle. The remaining two of the six steam retaining pipes 2-3 are arranged relatively on the outside of the tube bundle 2-2 along the axial extension direction of the steam inlet pipe 8, and the remaining two steam retaining pipes 2-3 are arranged on the diameter of the shell-side cylinder 3-2 perpendicular to the axis of the steam inlet pipe 8. The axis of each steam retaining pipe 2-3 is perpendicular to the tube sheet 2-1, and the top end of each steam retaining pipe 2-3 is fixedly connected to the bottom end of the tube sheet 2-1. Other components and connection methods are the same as those of the fourth embodiment.

[0027] In this embodiment, the arrangement of six steam retaining pipes 2-3 can effectively support each pipeline in the eight-process tube bundle, reduce internal connectors, and make the equipment structure simple and compact.

[0028] Specific implementation method six: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the fifth embodiment is that a plurality of connecting through holes are processed at equal intervals along the circumferential direction at the edge of the top end of the tube sheet 2-1, and each connecting through hole is coaxially arranged with a connecting hole on the water chamber flange 1-1 and a connecting hole on the shell flange 3-1. The bolts in each bolt assembly 5 pass through a connecting hole on the water chamber flange 1-1, a connecting through hole and a connecting hole on the shell flange 3-1 in sequence and are inserted into the nuts in the same bolt assembly 5, and the bolts are threadedly connected to the nuts. The other components and connection methods are the same as those in the fifth embodiment.

[0029] In this arrangement, the water chamber flange 1-1, the tube sheet 2-1 and the shell flange 3-1 are compressed and sealed by tightening a plurality of bolt assemblies 5, so that the low-pressure heater will not leak, and this connection method is easy to disassemble, which is beneficial to subsequent maintenance.

[0030] Specific implementation method seven: Combination Figures 1 to 3 This embodiment is described. The difference between this embodiment and the sixth embodiment is that two ear-type supports 4 are equidistantly arranged on the outer ring wall of the shell-side cylinder 3-2 along the circumferential direction, and each ear-type support 4 is fixedly connected to the shell-side cylinder 3-2. Other components and connection methods are the same as those of the sixth embodiment.

[0031] The present invention is disclosed as above with a preferred implementation case, but it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the equivalent implementation cases with equivalent changes by using the structure and technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0032] How it works

[0033] When the utility model is working, the water chamber flange 1-1, the tube sheet 2-1, and the shell flange 3-1 are compressed and sealed by tightening a plurality of bolt assemblies 5, so that the low-pressure heater will not leak. Condensate enters from the water inlet pipe 6, and Figure 2 , Figure 3 The ①-⑧ processes sequentially pass through the tube bundle 2-2 and finally flow out from the outlet pipe 7. Steam enters from the steam inlet pipe 8 fixed to the upper part of the shell 2, exchanges heat with the condensed water in the tube bundle 2-2, and condenses into drain, which flows out from the drain pipe 9 fixed to the bottom of the shell 2. The low-pressure heater is connected to the low-pressure heater base through two ear-type supports fixed in the middle of the shell 2, thereby fixing the low-pressure heater.

Claims

1. A small vertical low-voltage heater for a mobile generator set, characterized in that: The low-pressure heater comprises a water chamber (1), a pipe system (2) and a shell (3), wherein the pipe system (2) is inserted into the shell (3), the water chamber (1) is arranged at the top of the pipe system (2), and the water chamber (1), the pipe system (2) and the shell (3) are detachably connected by a plurality of bolt assemblies (5), the water chamber (1) is provided with a water inlet pipe (6) and a water outlet pipe (7), and the water outlet end of the water inlet pipe (6) and the water inlet end of the water outlet pipe (7) are both connected to the water chamber (1), a steam inlet pipe (8) is provided on the upper part of the outer wall of the shell (3), and the axis of the steam inlet pipe (8) is arranged perpendicular to the axis of the shell (3), and the steam outlet end of the steam inlet pipe (8) is connected to the shell (3), and a drain pipe (9) is provided at the center of the bottom end of the shell (3), and the water inlet end of the drain pipe (9) is connected to the shell (3); The pipe system (2) comprises a tube sheet (2-1), a tube bundle (2-2) and a plurality of steam retaining pipes (2-3); the tube bundle (2-2) is inserted into the tube sheet (2-1), and the tube bundle (2-2) is connected to the tube sheet (2-1); the plurality of steam retaining pipes (2-3) are inserted into the tube bundle (2-2), and the plurality of steam retaining pipes (2-3) are fixedly connected to the tube sheet (2-1); the tube sheet (2-1), the water chamber (1) and the shell (3) are detachably connected via a plurality of bolt assemblies (5).

2. A small vertical low-pressure heater for a mobile generator set according to claim 1, characterized in that: The water chamber (1) comprises a water chamber flange (1-1), a water chamber cylinder (1-2) and a flow partition (1-3); the top end of the water chamber cylinder (1-2) is a closed end, the bottom end of the water chamber cylinder (1-2) is an open end, the open end of the water chamber cylinder (1-2) is buckled on the water chamber flange (1-1), and the water chamber cylinder (1-2) is fixedly connected to the water chamber flange (1-1); the flow partition (1-3) is arranged in the water chamber cylinder (1-2), and the flow partition (1-3) is fixedly connected to the water chamber cylinder (1-2) and the water chamber flange (1-1); the flow partition (1-3) adopts a crisscross structure matching the tube bundle (2-2).

3. A small vertical low-pressure heater for a mobile generator set according to claim 2, characterized in that: The shell (3) comprises a shell flange (3-1) and a shell-side cylinder (3-2); the top end of the shell-side cylinder (3-2) is an open end, the bottom end of the shell-side cylinder (3-2) is a closed end, the shell flange (3-1) is arranged on the open end of the shell-side cylinder (3-2), and the shell flange (3-1) is fixedly connected to the shell-side cylinder (3-2).

4. A small vertical low-pressure heater for a mobile generator set according to claim 3, characterized in that: The tube bundle (2-2) is an eight-pass tube bundle.

5. A small vertical low-pressure heater for a mobile generator set according to claim 4, characterized in that: The number of the steam retaining pipes (2-3) is 6. Four of the six steam retaining pipes (2-3) are arranged in the shell-side cylinder (3-2) at equal intervals in sequence along the axial extension direction of the steam inlet pipe (8), and each of the four steam retaining pipes (2-3) is correspondingly arranged between the pipelines of two adjacent processes in the eight-process tube bundle. The remaining two of the six steam retaining pipes (2-3) are relatively arranged on the outside of the tube bundle (2-2) along the axial extension direction of the steam inlet pipe (8), and the remaining two steam retaining pipes (2-3) are both arranged on the tube diameter of the shell-side cylinder (3-2) arranged perpendicularly to the axial line of the steam inlet pipe (8). The axial line of each steam retaining pipe (2-3) is arranged perpendicularly to the tube sheet (2-1), and the top end of each steam retaining pipe (2-3) is fixedly connected to the bottom end of the tube sheet (2-1).

6. A small vertical low-pressure heater for a mobile generator set according to claim 4, characterized in that: A plurality of connecting through holes are processed at equal intervals along the circumferential direction at the edge of the top end of the tube sheet (2-1), and each connecting through hole is coaxially arranged with a connecting hole on the water chamber flange (1-1) and a connecting hole on the shell flange (3-1). The bolts in each bolt assembly (5) pass through a connecting hole on the water chamber flange (1-1), a connecting through hole and a connecting hole on the shell flange (3-1) in sequence and are inserted into a nut in the same bolt assembly (5), and the bolts are threadedly connected to the nut for disassembly.

7. A small vertical low-pressure heater for a mobile generator set according to claim 5, characterized in that: Two ear-type supports (4) are equidistantly arranged on the outer ring wall of the shell-side cylinder (3-2) along the circumferential direction, and each ear-type support (4) is fixedly connected to the shell-side cylinder (3-2).

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