CN217131230U

CN217131230U - Coiled pipe kettle type evaporator

Info

Publication number: CN217131230U
Application number: CN202220178136.1U
Authority: CN
Inventors: 张武玄; 江晶亮; 陈君; 弓卫军
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-08-05
Anticipated expiration: 2032-01-21

Abstract

The utility model provides a coiled pipe kettle-type evaporator, which relates to the kettle-type evaporator field and comprises a shell, wherein an inlet header and an outlet header are respectively arranged at the two ends inside the shell, a coiled pipe group is arranged between the inlet header and the outlet header, one end of the coiled pipe group is connected with the inlet header, the other end of the coiled pipe group is connected with the outlet header, the inlet header is connected with a tube side inlet connecting pipe, the outlet header is connected with a tube side outlet connecting pipe, a shell side inlet connecting pipe communicated with the shell is arranged below the outer part of the shell, a shell side outlet connecting pipe communicated with the shell is arranged above the outer part of the shell, and a demister is arranged above the inner part of the shell; the coil pipe is adopted to replace a conventional heat exchange pipe, so that the evaporator can bear large temperature difference of cold and hot media, and the structural safety of the evaporator is ensured; by adopting the kettle type shell and the wire mesh demister structure, the steam-water separation is realized in the evaporator, the compactness of a steam generation system is facilitated, a steam pocket, a pipeline and matched accessories are saved, and the construction cost and the occupied area are reduced.

Description

Coiled pipe kettle type evaporator

Technical Field

The utility model belongs to cauldron formula evaporimeter field especially relates to a coiled pipe cauldron formula evaporimeter.

Background

High-efficiency and clean renewable energy utilization technologies such as photo-thermal power generation, waste heat recovery and energy storage are developing in fire and heat, and the technologies are generally provided with steam generation systems.

The evaporator is the core equipment of the steam generation system and is the key for ensuring the performance and reliability of the whole system. At present, an evaporator is developing towards high parameters and large-scale, application conditions under various complex working conditions and severe working conditions are more and more rigorous, and in some scenes, the temperature difference of cold and hot media of the evaporator exceeds 150 ℃, and the conventional shell-and-tube structure cannot meet the safety requirement; in addition, in view of the compactness of the apparatus, it is sometimes necessary to perform steam-water separation in the evaporator.

Conventional kettle-type evaporator generally adopts U-shaped pipe or fixed tube plate structure, can't solve the problem that the tube sheet is heated unevenly and produces great difference in temperature stress under the big difference in temperature condition, and the tube sheet generally adopts large-scale forging, and manufacturing cost is higher. In addition, the conventional kettle-type evaporator wire mesh demister is generally arranged in a steam outlet connecting pipe, the diameter of the connecting pipe is large, in order to meet the strength requirement, the shell and the steam outlet connecting pipe are made of more materials, the manufacturing cost is high, the wire mesh demister is limited by the size of the connecting pipe, and the steam treatment amount of the wire mesh demister is also limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that: (1) the structural safety of the evaporator under the conditions of high temperature and large temperature difference is ensured; (2) the steam-water separation function is integrated in the evaporator in a limited space.

In order to solve the technical problem, the utility model provides a coiled pipe kettle-type evaporator, which comprises a housin, the inside both ends of casing set up import collection box and export collection box respectively, set up snakelike nest of tubes between import collection box and the export collection box, the one end of snakelike nest of tubes with import collection box connects, the other end with export collection box connects, import collection box and the tube side import takeover that is used for introducing hot medium are connected, export collection box and the tube side export takeover that is used for drawing hot medium are connected, the casing outside below set up with the casing intercommunication be used for introducing cold medium's shell side import takeover, the outside top of casing set up with the casing intercommunication be used for drawing cold medium's shell side export takeover.

The shell is used for containing a cold medium and internal components; the inlet header is used for realizing uniform distribution of the heat medium; the serpentine tube group is used for realizing heat exchange of cold and hot media; the outlet header is used for realizing the confluence of the heat medium.

Further, a demister is arranged above the inside of the shell, and the demister is positioned below the shell-side outlet connecting pipe.

The shell pass inlet connecting pipes are uniformly arranged below the outer portion of the shell, so that a cold medium uniformly flows through the coiled pipe group to be heated and evaporated, the shell pass outlet connecting pipes are uniformly arranged above the outer portion of the shell in an area where the demister is located, and the demister is used for achieving steam-water separation.

Further, the demister is a wire mesh demister and comprises a frame, a wire mesh and a sealing plate, the frame is fixed above the inside of the shell, the wire mesh is located in the frame, and the sealing plate is located on the outer side of the frame, so that steam flows out through the wire mesh, and steam-water separation is realized.

Furthermore, the shape of import collection box is the test tube form, including straight tube, first head and a plurality of connecting nozzle, first head is located the below of straight tube and with the straight tube is connected, set up a plurality of pores on the straight tube, the connecting nozzle is installed on the pore, the structure of import collection box with the structure of export collection box is the same.

Furthermore, the tube side inlet connecting tube adopts a hot sleeve structure and comprises an inner tube and an outer tube, the inner tube is connected with the upper part of the straight tube, the outer tube is connected with the shell, and the tube side inlet connecting tube and the tube side outlet connecting tube have the same structure.

The connection relationship between the tube side outlet connecting tube and the outlet header is the same as that between the tube side inlet connecting tube and the inlet header, and the functions are also the same.

Further, the serpentine tube group comprises a plurality of layers of serpentine tube bundles, each layer of serpentine tube bundles comprises a plurality of serpentine tubes, the inlet ends of the serpentine tubes are connected with the connecting nozzles on the inlet header, and the outlet ends of the serpentine tubes are connected with the connecting nozzles on the outlet header.

The coiled pipe is formed by bending a plurality of sections of a long pipe, and can absorb the thermal expansion displacement difference between the shell and the coiled pipe group between the pipe pass inlet connecting pipe and the pipe pass outlet connecting pipe due to different temperatures by utilizing the deformation of the coiled pipe.

Furthermore, the snakelike nest of tubes is fixed through a plurality of tube bank grip blocks the inside of casing, every tube bank grip block comprises a plurality of layers of cardboard that have the half slot of arranging from top to bottom, and the half slot on two adjacent cardboard from top to bottom splices each other, and every layer of cardboard is located between two-layer snakelike tube bank from top to bottom.

The pipe bundle clamping plate is at several of snakelike bundle length direction evenly distributed, and every pipe bundle clamping plate is pieced together by several layers of cardboard that have the half slot from top to bottom, and the upper end and the lower extreme of every cardboard all are equipped with the half slot, and the half slot on two adjacent cardboards from top to bottom splices into the circular slot, and the coiled pipe is located between the circular slot that two half slots splice, welds the connection between the cardboard, and the pipe bundle clamping plate is used for fixed snakelike nest of tubes to prevent snakelike bundle vibration.

Furthermore, a tube bundle supporting seat is arranged at the lower part in the shell, and the tube bundle clamping plate is movably fixed on the tube bundle supporting seat.

The tube bundle supporting seat is a supporting track which is composed of rigid components and is arranged along the length direction of the snake-shaped tube bundle, and the snake-shaped tube bundle is supported by the tube bundle clamping plates. The tube bundle clamping plate is fixed with the serpentine tube group, the tube bundle supporting seat is fixed in the shell, the serpentine tube bundle is different in temperature from the shell, and the thermal expansion amount is different, so that the tube bundle clamping plate is movably fixed on the tube bundle supporting seat, and the safe operation of the heat exchanger is ensured.

The shell, the silk screen demister, the shell side inlet connecting pipe and the shell side outlet connecting pipe form a shell side component, and the tube side and the shell side are connected through the tube side inlet connecting pipe, the tube side outlet connecting pipe and the tube bundle supporting seat.

The inner pipe on the pipe pass inlet connecting pipe and the pipe pass outlet connecting pipe is used for bearing the pipe pass pressure, the outer pipe on the pipe pass inlet connecting pipe and the pipe pass outlet connecting pipe is used for bearing the shell pass pressure, and the temperature difference between the pipe pass and the shell pass can be borne by connecting the inner pipe with the inlet header or the outlet header and connecting the outer pipe with the shell.

Has the advantages that:

(1) the utility model provides a coiled pipe kettle type evaporator, which comprises a shell, wherein an inlet header and an outlet header are respectively arranged at two ends inside the shell, a coiled pipe group is arranged between the inlet header and the outlet header, one end of the coiled pipe group is connected with the inlet header, the other end of the coiled pipe group is connected with the outlet header, the inlet header is connected with a pipe side inlet connecting pipe for leading in a heat medium, the outlet header is connected with a pipe side outlet connecting pipe for leading out the heat medium, a shell side inlet connecting pipe for leading in a cold medium is arranged below the outer part of the shell and is communicated with the shell, a shell side outlet connecting pipe for leading out the cold medium is arranged above the outer part of the shell and is communicated with the shell, and a foam remover is arranged above the inner part of the shell; the coil pipe is adopted to replace a conventional heat exchange pipe, so that the evaporator can bear large temperature difference of cold and hot media, and the structural safety of the evaporator is ensured; by adopting the kettle type shell and the wire mesh demister structure, the steam-water separation is realized in the evaporator, the compactness of a steam generation system is facilitated, a steam pocket, a pipeline and matched accessories are saved, and the construction cost and the occupied area are reduced.

(2) The inlet header and the outlet header are adopted to replace conventional tube plates, the joint with the coiled tube is more reliable, the inspection is convenient, the quality is guaranteed, the structure is safer, and the material is saved.

(3) The wire mesh demister is arranged in the shell, and compared with the conventional kettle type evaporator, the wire mesh demister is not limited by the size of the steam outlet connecting pipe, so that the steam treatment capacity can be increased, the materials for the shell and the steam outlet connecting pipe can be saved, and the manufacturing cost is reduced.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic view of a serpentine tube kettle evaporator;

FIG. 2 is a schematic view of a single layer serpentine tube bundle configuration;

FIG. 3 is a schematic diagram of a tube bundle clamping plate structure;

FIG. 4 is an enlarged view taken at A in FIG. 1;

FIG. 5 is a schematic view of the inlet and outlet headers;

the reference numbers are as follows:

1. a tube pass inlet connection tube; 1-1, an outer tube; 1-2, inner tube; 2. an inlet header; 2-1, straight pipe; 2-2, connecting a pipe nozzle; 2-3, a first seal head; 3. a serpentine tube set; 4. a tube bundle clamping plate; 5. a tube bundle supporting seat; 6. an outlet header; 7. a tube pass outlet connection tube; 8. a housing; 9. a demister; 10. a shell side inlet connecting pipe; 11. and a shell side outlet connecting pipe.

Detailed Description

The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

Example (b):

as shown in fig. 1 to 5, in a preferred embodiment, there is provided a serpentine tube kettle evaporator, comprising a housing 8 for accommodating a cooling medium and internal components, an inlet header 2 for achieving uniform distribution of the cooling medium and an outlet header 6 for achieving confluence of the cooling medium are respectively disposed at two ends of the interior of the housing 8, a serpentine tube group 3 for achieving heat exchange of the cooling medium and the heating medium is disposed between the inlet header 2 and the outlet header 6, one end of the serpentine tube group 3 is connected to the inlet header 2, the other end is connected to the outlet header 6, the inlet header 2 is connected to a tube side inlet connection pipe 1 for introducing the cooling medium, the outlet header 6 is connected to a tube side outlet connection pipe 7 for leading the cooling medium, a demister 9, preferably a wire mesh demister, is disposed above the interior of the housing 8, the wire mesh demister is located below a shell side outlet connection pipe 11, and comprises a frame, a wire mesh and a sealing plate, the frame welds in the inside top of casing 8, and the silk screen is located the frame, and the shrouding is located the outside of frame, seals the frame all around, and steam gets into the silk screen by the bottom and removes the foam, realizes steam-water separation. Four shell pass inlet connecting pipes 10 communicated with the shell 8 and used for introducing cold media are uniformly arranged below the outer portion of the shell 8, so that the cold media uniformly flow through the serpentine pipe group 3 to be heated and evaporated, two shell pass outlet connecting pipes 11 communicated with the shell 8 and used for leading out the cold media are arranged in an area where the demister 9 is located above the outer portion of the shell 8, and steam-water separation is realized by the demister 9.

The structural symmetry of casing 8, including first barrel section, oblique cone section, second barrel section and second head, first barrel section is located casing 8's middle zone, provides the space that satisfies steam-water separation, and two oblique cone sections are connected with the both ends of first barrel section respectively, and the other end and the second head of two oblique cone sections are connected, and casing 8's bottom sets up the support, can open on the barrel and establish the manhole for personnel business turn over equipment is so that installation, maintenance and safety inspection.

The shape of the inlet header 2 is a test tube shape, and comprises a straight tube 2-1, an elliptical first seal head 2-3 and a plurality of connecting pipe mouths 2-2, wherein the first seal head 2-3 is positioned below the straight tube 2-1 and connected with the straight tube 2-1, a plurality of pipe holes are formed in the straight tube 2-1, the connecting pipe mouths 2-2 are welded on the pipe holes, and the structure of the inlet header 2 is the same as that of the outlet header 6.

The tube side inlet connecting tube 1 adopts a thermal sleeve structure and comprises an inner tube 1-2 and an outer tube 1-1, wherein the inner tube 1-2 is connected with the upper part of a straight tube 2-1 and circulates a heat medium, the outer tube 1-1 is connected with a shell 8, and the tube side inlet connecting tube 1 and a tube side outlet connecting tube 7 have the same structure.

The connection relation between the tube side outlet connecting tube 7 and the outlet header 6 is the same as that between the tube side inlet connecting tube 1 and the inlet header 2, and the function is also the same.

The serpentine pipe group 3 comprises a plurality of layers of serpentine pipe bundles, each layer of serpentine pipe bundle comprises a plurality of serpentine pipes, the inlet ends of the serpentine pipes are connected with the connecting pipe nozzles 2-2 on the inlet header 2, and the outlet ends of the serpentine pipes are connected with the connecting pipe nozzles 2-2 on the outlet header 6.

The coiled pipe is formed by bending a long pipe in multiple sections, and the thermal expansion displacement difference between the shell 8 and the coiled pipe group 3 between the pipe pass inlet connecting pipe 1 and the pipe pass outlet connecting pipe 7 due to different temperatures can be absorbed by utilizing the self deformation.

The snakelike nest of tubes 3 is fixed in the inside of casing 8 through a plurality of tube bank grip blocks 4, and every tube bank grip block 4 comprises a plurality of layers of the cardboard that has the half slot of arranging from top to bottom, and the half slot on two adjacent cardboard from top to bottom splices each other, and every layer of cardboard is located between two-layer snakelike tube bank from top to bottom.

The tube bundle clamping plates 4 are uniformly distributed in the length direction of the snake-shaped tube bundle, each tube bundle clamping plate 4 is formed by splicing an upper layer of clamping plates and a lower layer of clamping plates with semicircular grooves, the upper end and the lower end of each clamping plate are provided with the semicircular grooves, the semicircular grooves on the two clamping plates which are adjacent from top to bottom are spliced into the circular grooves, the snake-shaped tubes are positioned between the circular grooves formed by splicing the two semicircular grooves, the clamping plates are connected by electric welding, and the tube bundle clamping plates 4 are used for fixing the snake-shaped tube bundle 3 to prevent the snake-shaped tube bundle from vibrating;

the lower part sets up tube bank supporting seat 5 in the casing 8, and tube bank supporting seat 5 is the support track along snakelike tube bank length direction by what just the component was constituteed, plays the supporting role to snakelike tube bank through tube bank grip block 4, and tube bank grip block 4 is movably fixed on tube bank supporting seat 5.

It should be noted that the number of the connecting nozzles 2-2 and the pipe holes in the inlet header 2 and the outlet header 6, the serpentine pipe bundles and the serpentine pipes in the serpentine pipe group 3, the bundle clamping plates 4 and the clamping plates are not fixed, and the connecting nozzles can be designed according to the needs.

The installation process of the serpentine tube kettle evaporator provided by the embodiment is as follows:

the inlet end of the serpentine pipe is in butt joint with the connecting pipe mouth 2-2 on the inlet header 2, the outlet end of the serpentine pipe is in butt joint with the connecting pipe mouth 2-2 on the outlet header 6, after each layer of planar serpentine pipe is assembled, the clamping plates of the pipe bundle clamping plates 4 are arranged on the layer of serpentine pipe bundle, and the two layers of clamping plates are fixed in a spot welding mode. The assembly is completed among the first cylinder section, the oblique cone section, the second cylinder section and the second head, the support, the manhole and other necessary connecting pipes of the shell 8, the shell side inlet connecting pipe 10 is uniformly installed below the outside of the shell 8, the shell side outlet connecting pipe 11 is uniformly installed above the outside of the shell 8, the framework of the wire mesh demister is installed above the inside of the shell 8, and the tube bundle support base 5 is installed at the lower part in the shell 8 and below the serpentine pipe group 3. And pushing the assembled snake-shaped tube bundle into place from one second sealing end of the shell 8, welding the tube side inlet connecting tube 1 with the inlet header 2 and the shell 8 in sequence, and welding the tube side outlet connecting tube 7 with the outlet header 6 and the shell 8 in sequence. The wire mesh and the closing plate of the wire mesh demister are mounted on the frame. Finally, the other second end socket of the shell 8 is assembled and welded.

When the evaporator operates, cold medium enters the shell body 8 through the shell side inlet connecting pipe 10, hot medium enters the inlet header 2 through the tube side inlet connecting pipe 1 and is uniformly distributed in the serpentine pipe, heat is transferred to the cold medium outside the serpentine pipe, the cold medium is heated and evaporated, steam rises and flows through the wire mesh demister to realize steam-water separation, the steam flows out of the shell side outlet connecting pipe 11, and the hot medium after heat exchange flows out of the tube side outlet connecting pipe 7 after being collected by the outlet header 6. The coiled pipe can be freely deformed when being subjected to large temperature difference of cold and hot media, the safety of the structure is guaranteed, and the wire mesh demister can realize steam-water separation in the evaporator, so that the system is more compact.

Claims

1. A coiled pipe kettle type evaporator is characterized by comprising a shell (8), wherein an inlet header (2) and an outlet header (6) are respectively arranged at two ends inside the shell (8), a serpentine pipe group (3) is arranged between the inlet header (2) and the outlet header (6), one end of the serpentine pipe group (3) is connected with the inlet header (2), the other end is connected with the outlet header (6), the inlet header (2) is connected with a tube side inlet connecting tube (1) for introducing a heat medium, the outlet header (6) is connected with a tube side outlet connecting tube (7) for leading out the heat medium, a shell side inlet connecting pipe (10) which is communicated with the shell (8) and is used for introducing cold medium is arranged below the outer part of the shell (8), and a shell side outlet connecting pipe (11) which is communicated with the shell (8) and is used for leading out cold medium is arranged above the outer part of the shell (8).

2. A serpentine kettle evaporator according to claim 1, wherein a demister (9) is arranged above the interior of the shell (8), the demister (9) being located below the shell-side outlet connection (11).

3. A serpentine kettle evaporator according to claim 2, wherein the demister (9) is a wire mesh demister comprising a frame fixed over the interior of the housing (8), a wire mesh located within the frame and a sealing plate located outside the frame.

4. A serpentine tube kettle evaporator according to claim 2, wherein the inlet header (2) is in the shape of a test tube and comprises a straight tube (2-1), a first seal head (2-3) and a plurality of connecting nozzles (2-2), the first seal head (2-3) is located below the straight tube (2-1) and connected with the straight tube (2-1), the straight tube (2-1) is provided with a plurality of tube holes, the connecting nozzles (2-2) are mounted on the tube holes, and the inlet header (2) has the same structure as the outlet header (6).

5. A coiled pipe kettle evaporator according to claim 4, characterized in that the tube side inlet connection pipe (1) adopts a thermal sleeve structure and comprises an inner pipe (1-2) and an outer pipe (1-1), the inner pipe (1-2) is connected with the upper part of the straight pipe (2-1), the outer pipe (1-1) is connected with the shell (8), and the tube side inlet connection pipe (1) and the tube side outlet connection pipe (7) have the same structure.

6. A serpentine tube kettle evaporator according to claim 5, wherein the set of serpentine tubes (3) comprises a number of layers of serpentine tube bundles, each layer of serpentine tube bundles comprising a number of serpentine tubes, the inlet ends of the serpentine tubes being connected to the connection nozzles (2-2) on the inlet header (2) and the outlet ends of the serpentine tubes being connected to the connection nozzles (2-2) on the outlet header (6).

7. A serpentine tube kettle evaporator according to claim 6, wherein the serpentine tube group (3) is fixed inside the shell (8) by a plurality of tube bundle holding plates (4), each tube bundle holding plate (4) is composed of a plurality of layers of semi-circular grooves arranged up and down, the semi-circular grooves on two adjacent upper and lower holding plates are spliced with each other, and each layer of holding plate is positioned between the upper and lower layers of serpentine tube bundles.

8. A serpentine tube kettle evaporator according to claim 7, characterized in that a tube bundle support base (5) is arranged in the lower part of the shell (8), and the tube bundle holding plate (4) is movably fixed to the tube bundle support base (5).