Continuous waste heat recovery equipment

Abstract

The present application discloses a series of waste heat recovery equipment, including: a shell, the interior of which is divided into two spaces; two sealing cover plates for sealing the two spaces; a filter assembly, including a mounting plate, a plurality of filter tubes and an extension rod; the mounting plate separates the corresponding space into a first part and a second part, and the extension rod passes through the sealing cover plate; a first steam pipe group, having a steam inlet main pipe, two steam inlet branch pipes and a first control valve; a second steam pipe group, having a steam exhaust main pipe, two steam exhaust branch pipes and a second control valve; a transfer seat, located on the outside of the sealing cover plate; two sets of clamping mechanisms, installed on the transfer seat; a telescopic element, used to drive the transfer seat to move linearly. The present application only requires one shell structure with a filtering function, without two sets, and the overall purchase cost can be reduced; through the separated design, different groups of filter assemblies can be maintained separately, and the utilization rate of each filter assembly is high.

Description

Technical Field

[0001] The present invention relates to the field of boilers, and in particular to a continuous waste heat recovery device. Background Art

[0002] Boiler blowdown is a major loss in boiler operation. In order to control the quality of boiler water and steam, the boiler's wastewater must be discharged continuously. It is required to continuously discharge part of the boiler water from the part with the highest salt and alkali concentration in the boiler water to reduce the salt content, alkali content, silica content and the content of suspended slag in the boiler water.

[0003] Patent document CN 218523550 U discloses a continuous waste heat recovery system, comprising a continuous waste heat recovery device, a steam inlet pipe, a steam outlet pipe, and a continuous waste water inlet pipe. One end of the continuous waste water inlet pipe is used to introduce continuous waste water, and the other end is connected to the steam inlet pipe. One end of the steam inlet pipe is used to introduce superheated steam, and the other end is connected to the continuous waste heat recovery device. The continuous waste heat recovery device 1 is used to purify the mixed steam of vaporized continuous waste water and superheated steam. The steam outlet pipe is used to lead out the mixed steam after purification by the continuous waste heat recovery device.

[0004] The aforementioned patent document describes two tandem waste heat recovery units, one in standby mode. When one unit requires maintenance, cleaning, or filter tube replacement, the other unit can be used. The installation of two tandem waste heat recovery units results in high overall equipment costs, and the average utilization rate of each unit is only 50%. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a continuous waste heat recovery device.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A continuous waste heat recovery device, comprising:

[0008] a shell, wherein one end of the shell is open and the other end is closed, and an insulating partition is provided inside the shell, wherein the insulating partition divides the inside of the shell into two spaces, namely a first space and a second space;

[0009] Two sealing cover plates, detachably and hermetically fixed to the opening of the housing by fasteners, the two sealing cover plates being respectively a first sealing cover plate and a second sealing cover plate, the first sealing cover plate being used to seal the first space, and the second sealing cover plate being used to seal the second space;

[0010] Two groups of filter assemblies, each comprising a mounting plate, a plurality of filter tubes fixed to the mounting plate, and an extension rod fixed to the mounting plate, wherein one end of the filter tube is open and the other end is closed; the two groups of filter assemblies are respectively disposed in two spaces of the housing, the mounting plates of the filter assemblies being located in and sealingly cooperating with the corresponding spaces, the mounting plates dividing the corresponding spaces into a first portion and a second portion, each filter tube being located in the corresponding space, with the open end of the filter tube facing the first portion or extending into the first portion, and an end of the extension rod away from the mounting plate passing through and being fixed to the corresponding sealing cover plate;

[0011] a first steam pipe group comprising a steam inlet main pipe, two steam inlet branch pipes both connected to the steam inlet main pipe, and a first control valve for controlling the opening and closing of the steam inlet branch pipes, the two steam inlet branch pipes being a first steam inlet branch pipe and a second steam inlet branch pipe, the first steam inlet branch pipe being connected to the first portion of the first space, and the second steam inlet branch pipe being connected to the first portion of the second space;

[0012] a second steam pipe group comprising a steam exhaust main pipe, two steam exhaust branch pipes both connected to the steam exhaust main pipe, and a second control valve for controlling the opening and closing of the steam exhaust branch pipes, the two steam exhaust branch pipes being a first steam exhaust branch pipe and a second steam exhaust branch pipe, the first steam exhaust branch pipe being connected to the second portion of the first space, and the second steam exhaust branch pipe being connected to the second portion of the second space;

[0013] A transfer seat, located on the outside of the sealing cover;

[0014] Two sets of clamping mechanisms are installed on the transfer seat. The two sets of clamping mechanisms cooperate with the two extension rods respectively. When the clamping mechanisms are working, they can clamp the corresponding extension rods.

[0015] The telescopic element cooperates with the transfer seat to drive the transfer seat to move linearly.

[0016] The present application provides a working method: during initial operation, the first control valve and the second control valve are both open, and the filter components in the two spaces are both working. When a group of filter components needs to be maintained, the corresponding control valve is controlled to work so that steam no longer enters or is discharged from the space where the filter components to be maintained are located. Then, the fasteners on the corresponding sealing cover plate are unscrewed to allow the sealing cover plate to be separated from the housing. The corresponding clamping mechanism works to clamp the extension rod of the filter group to be maintained. Then, the telescopic element works to move the filter component to be maintained together with the sealing cover plate fixed to the extension rod outward and out of the housing. After the filter components are moved out, the staff can perform maintenance operations such as cleaning, inspection or replacement on the filter tube. After the maintenance is completed, the telescopic element works to move the maintained filter component together with the sealing cover plate fixed to the extension rod toward the inside of the housing. After moving into place, the fasteners are locked to seal the sealing cover plate with the housing.

[0017] The main cost of the continuous waste heat recovery equipment is the filter tube. This application only requires one shell structure with filtering function, without two sets, and the overall purchase cost can be reduced; through the separated design, different groups of filter components can be maintained separately, and the utilization rate of each filter component is high.

[0018] In one embodiment of the present invention, a rotating mechanism is further included, wherein a rotating shaft of the rotating mechanism is fixed to the telescopic element, and an axis of the rotating shaft is perpendicular to the movement direction of the telescopic element.

[0019] The rotating mechanism can be set to rotate the filter assembly to other positions after it is completely removed, so as to facilitate maintenance operations.

[0020] In one embodiment of the present invention, the inner wall of the space has a mounting groove arranged along the circumference of the space, and a seal is also provided in the shell. The seal is arranged in the mounting groove and is used to seal the outer wall of the sleeve on the mounting plate.

[0021] A reliable sealing effect can be achieved by the sealing element.

[0022] In one embodiment of the present invention, the cross-section of the seal is a right-angled trapezoid having a short base, a long base, a short waist and a long waist. The long waist is inclined relative to the axis of the shell, and the short base is located on the side away from the first part.

[0023] The seal is designed in such a way that it can achieve a reliable sealing fit when the mounting plate is moved in.

[0024] In one embodiment of the present invention, a slide groove is provided on the inner wall of the space, and a slider is provided on the mounting plate. The slider slides in cooperation with the slide groove. When the slider abuts against the end of the slide groove, the mounting plate is sleeved on the sealing member.

[0025] The chute and the slider cooperate with each other to provide reliable guidance and ensure reliable resetting of the filter assembly.

[0026] In one embodiment of the present invention, a portion of the extension rod located outside the sealing cover plate has a limiting protrusion, and an end portion of the clamping mechanism abuts against the limiting protrusion.

[0027] In one embodiment of the present invention, two sets of clamping mechanisms are respectively mounted on two extension rods.

[0028] In one embodiment of the present invention, the clamping mechanism is an electric three-jaw chuck.

[0029] In one embodiment of the present invention, both the first control valve and the second control valve are electric control valves.

[0030] In one embodiment of the present invention, the shell is a hollow cylindrical shell, and the first space and the second space are symmetrical with respect to the heat insulation partition.

[0031] The beneficial effects of the present invention are: the main cost of the continuous waste heat recovery equipment is the filter tube. This application only requires one shell structure with a filtering function, without two sets, and the overall purchase cost can be reduced; through the separated design, different groups of filter components can be maintained separately, and the utilization rate of each filter component is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the continuous waste heat recovery equipment;

[0033] Figure 2 This is a schematic diagram of the continuous waste heat recovery equipment after removing the transfer seat, clamping mechanism, telescopic element and rotating mechanism;

[0034] Figure 3 This is a front view of the continuous waste heat recovery equipment after removing the transfer seat, clamping mechanism, telescopic element and rotating mechanism;

[0035] Figure 4 yes Figure 3 Middle AA section view;

[0036] Figure 5 yes Figure 3 Middle BB cross-section;

[0037] Figure 6 yes Figure 5 Enlarged view of point D in the middle;

[0038] Figure 7 This is a schematic diagram of a set of filter components after they are completely removed from the housing;

[0039] Figure 8 This is a schematic diagram of the rotating mechanism operating to rotate the filter assembly completely removed from the housing;

[0040] Figure 9 is a schematic diagram of the filter assembly;

[0041] Figure 10 is a schematic diagram of the housing and filter assembly;

[0042] Figure 11 yes Figure 10 CC cross-sectional view.

[0043] The reference numerals in the figures are:

[0044] 1. Housing; 11. Insulating baffle; 1a. First space; 1b. Second space; 121. First portion; 122. Second portion; 13. Mounting slot; 14. Seal; 141. Short bottom edge; 142. Long bottom edge; 143. Short waist; 144. Long waist; 15. Slide; 2. First sealing cover plate; 3. Second sealing cover plate; 4. Filter assembly; 41. Mounting plate; 411. Slider; 42. Filter tube; 421. Open end; 422. Closed end End; 43. Extension rod; 431. Limiting convex ring; 5. First steam pipe group; 51. Steam inlet main pipe; 52. First steam inlet branch pipe; 53. Second steam inlet branch pipe; 54. First control valve; 6. Second steam pipe group; 61. Steam outlet main pipe; 62. First steam outlet branch pipe; 63. Second steam outlet branch pipe; 64. Second control valve; 7. Transfer seat; 8. Clamping mechanism; 9. Telescopic element; 10. Rotating mechanism; 101. Rotating shaft. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0047] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0048] The present invention will be described in detail below with reference to the accompanying drawings.

[0049] like Figures 1 to 11 As shown, a continuous waste heat recovery device includes:

[0050] The housing 1 is open at one end and closed at the other end. The housing 1 has a heat-insulating partition 11 inside. The heat-insulating partition 11 divides the interior of the housing 1 into two spaces, namely a first space 1a and a second space 1b.

[0051] Two sealing cover plates are detachably and sealedly fixed to the opening of the housing 1 by fasteners. The two sealing cover plates are respectively a first sealing cover plate 2 and a second sealing cover plate 3. The first sealing cover plate 2 is used to seal the first space 1a, and the second sealing cover plate 3 is used to seal the second space 1b.

[0052] Two groups of filter assemblies 4, each comprising a mounting plate 41, a plurality of filter tubes 42 fixed to the mounting plate 41, and an extension rod 43 fixed to the mounting plate 41. The filter tubes 42 have an open end 421 at one end and a closed end 422 at the other end. The two groups of filter assemblies 4 are respectively disposed in two spaces of the housing. The mounting plates 41 of the filter assemblies 4 are located in and sealed with the corresponding spaces. The mounting plate 41 divides the corresponding spaces into a first portion 121 and a second portion 122. Each filter tube 42 is located in a corresponding space, with the open end 421 of the filter tube 42 facing the first portion 121 or extending into the first portion 121. The end of the extension rod 43 away from the mounting plate 41 passes through and is fixed to the corresponding sealing cover plate.

[0053] The first steam pipe group 5 includes a steam inlet main pipe 51, two steam inlet branch pipes connected to the steam inlet main pipe 51, and a first control valve 54 for controlling the opening and closing of the steam inlet branch pipes. The two steam inlet branch pipes are a first steam inlet branch pipe 52 and a second steam inlet branch pipe 53. The first steam inlet branch pipe 52 is connected to the first portion 121 of the first space 1a, and the second steam inlet branch pipe 53 is connected to the first portion 121 of the second space 1b.

[0054] The second steam pipe group 6 includes a steam exhaust main pipe 61, two steam exhaust branch pipes connected to the steam exhaust main pipe 61, and a second control valve 64 for controlling the opening and closing of the steam exhaust branch pipes. The two steam exhaust branch pipes are a first steam exhaust branch pipe 62 and a second steam exhaust branch pipe 63. The first steam exhaust branch pipe 62 is connected to the second portion 122 of the first space 1a, and the second steam exhaust branch pipe 63 is connected to the second portion 122 of the second space 1b.

[0055] The transfer seat 7 is located on the outside of the sealing cover plate;

[0056] Two sets of clamping mechanisms 8 are installed on the transfer base 7. The two sets of clamping mechanisms 8 cooperate with the two extension rods 43 respectively. When the clamping mechanisms are working, they can clamp the corresponding extension rods 43;

[0057] The telescopic element 9 cooperates with the transfer base 7 to drive the transfer base 7 to move linearly.

[0058] The basic working principle of this application is as follows: the continuous drainage water is atomized into steam to be filtered under the action of the atomizer and the boiler gas supply steam, the steam to be filtered enters the first part 121 in the outer shell 1 through the first steam pipe group 5, and then enters the interior of the filter tube 42 through the open end 421 of the filter tube 42. After being filtered by the filter tube 42, it is discharged from the side wall of the filter tube 42 and enters the second part 122 (impurities, etc. are located inside the filter tube 42). Finally, the filtered steam is transported to the outside through the second steam pipe group 6.

[0059] The present application has a working method: during initial operation, the first control valve 54 and the second control valve 64 are both open, and the filter components 4 in the two spaces are both working. When a group of filter components 4 needs to be maintained, the corresponding control valve is controlled to work so that steam no longer enters or is discharged from the space where the filter components 4 to be maintained are located. Then, the fasteners on the corresponding sealing cover plate are unscrewed to allow the sealing cover plate to be separated from the housing 1. The corresponding clamping mechanism 8 is operated to clamp the extension rod 43 of the filter group to be maintained. Then, the telescopic element 9 is operated to move the filter component 4 to be maintained together with the sealing cover plate fixed to the extension rod 43 outward and out of the housing 1. After being moved out, the staff can perform maintenance operations such as cleaning, inspection or replacement on the filter tube 42. After maintenance is completed, the telescopic element 9 is operated to move the maintained filter component 4 together with the sealing cover plate fixed to the extension rod 43 toward the inside of the housing 1. After moving into place, the fasteners are locked so that the sealing cover plate is sealed with the housing 1.

[0060] The main cost of the continuous waste heat recovery equipment is the filter tube 42. This application only requires one shell 1 structure with a filtering function, without two sets, and the overall purchase cost can be reduced; through the separated design, different groups of filter components 4 can be maintained separately, and the utilization rate of each filter component 4 is high.

[0061] In this embodiment, the filter tube 42 has multiple filter layers, and the filter tube 42 is used to filter salt and impurities. In actual use, the filter tube 42 of the present application can adopt an existing filter tube 42 capable of filtering salt and impurities, such as a ceramic layer, a polytetrafluoroethylene filter layer, a hollow fiber ultrafiltration layer, and an amino nanolayer structure arranged in sequence from the inside to the outside.

[0062] like Figure 1 、 Figure 7 and Figure 8 As shown, in this embodiment, a rotating mechanism 10 is further included. A rotating shaft 101 of the rotating mechanism 10 is fixed to the telescopic element 9 , and an axis of the rotating shaft 101 is perpendicular to the movement direction of the telescopic element 9 .

[0063] See Figure 8The rotating mechanism 10 is provided to enable the filter assembly 4 to be rotated to another station after it is completely removed, so as to facilitate maintenance operations.

[0064] like Figure 5 and Figure 6 As shown, in this embodiment, the inner wall of the space has a mounting groove 13 arranged along the circumference of the space, and a seal 14 is also provided in the shell 1. The seal 14 is set in the mounting groove 13 and is used to seal the outer wall of the sleeve on the mounting plate 41.

[0065] A reliable sealing effect can be achieved by the seal 14 .

[0066] like Figure 6 As shown, in this embodiment, the cross-section of the seal 14 is a right-angled trapezoid having a short base 141, a long base 142, a short waist 143 and a long waist 144. The long waist 144 is inclined relative to the axis of the shell, and the short base 141 is located on the side away from the first part 121.

[0067] The seal 14 is designed in such a way that a reliable sealing fit can be achieved when the mounting plate 41 is moved in.

[0068] like Figure 7 、 Figure 9 、 Figure 10 and Figure 11 As shown, in this embodiment, a slide groove 15 is provided on the inner wall of the space, and a slider 411 is provided on the mounting plate 41. The slider 411 slides in cooperation with the slide groove 15. When the slider 411 abuts against the end of the slide groove 15, the mounting plate 41 is sleeved on the seal 14.

[0069] The chute 15 and the slider 411 cooperate with each other to provide reliable guidance, ensuring that the filter assembly 4 is reliably reset.

[0070] like Figure 2 As shown, in this embodiment, the portion of the extension rod 43 located outside the sealing cover plate has a limiting protrusion 431 , and the end of the clamping mechanism 8 abuts against the limiting protrusion 431 .

[0071] In this embodiment, two sets of clamping mechanisms 8 are respectively mounted on the two extension rods 43 , and the clamping mechanisms 8 are electric three-jaw chucks.

[0072] In this embodiment, the first control valve 54 and the second control valve 64 are both electrically controlled valves.

[0073] like Figure 10 As shown, in this embodiment, the shell 1 is a hollow cylindrical shell 1 , and the first space 1 a and the second space 1 b are symmetrical relative to the heat insulation partition 11 .

[0074] The above description is only a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the present invention, directly or indirectly applied to other related technical fields, is also included in the scope of protection of the present invention.

Claims

1. A continuous waste heat recovery device, characterized in that: include: a shell, wherein one end of the shell is open and the other end is closed, and an insulating partition is provided inside the shell, wherein the insulating partition divides the inside of the shell into two spaces, namely a first space and a second space; Two sealing cover plates, detachably and hermetically fixed to the opening of the housing by fasteners, the two sealing cover plates being respectively a first sealing cover plate and a second sealing cover plate, the first sealing cover plate being used to seal the first space, and the second sealing cover plate being used to seal the second space; Two groups of filter assemblies, each comprising a mounting plate, a plurality of filter tubes fixed to the mounting plate, and an extension rod fixed to the mounting plate, wherein one end of the filter tube is open and the other end is closed; the two groups of filter assemblies are respectively disposed in two spaces of the housing, the mounting plates of the filter assemblies being located in and sealingly cooperating with the corresponding spaces, the mounting plates dividing the corresponding spaces into a first portion and a second portion, each filter tube being located in the corresponding space, with the open end of the filter tube facing the first portion or extending into the first portion, and an end of the extension rod away from the mounting plate passing through and being fixed to the corresponding sealing cover plate; a first steam pipe group comprising a steam inlet main pipe, two steam inlet branch pipes both connected to the steam inlet main pipe, and a first control valve for controlling the opening and closing of the steam inlet branch pipes, the two steam inlet branch pipes being a first steam inlet branch pipe and a second steam inlet branch pipe, the first steam inlet branch pipe being connected to the first portion of the first space, and the second steam inlet branch pipe being connected to the first portion of the second space; a second steam pipe group comprising a steam exhaust main pipe, two steam exhaust branch pipes both connected to the steam exhaust main pipe, and a second control valve for controlling the opening and closing of the steam exhaust branch pipes, the two steam exhaust branch pipes being a first steam exhaust branch pipe and a second steam exhaust branch pipe, the first steam exhaust branch pipe being connected to the second portion of the first space, and the second steam exhaust branch pipe being connected to the second portion of the second space; A transfer seat, located on the outside of the sealing cover; Two sets of clamping mechanisms are installed on the transfer seat. The two sets of clamping mechanisms cooperate with the two extension rods respectively. When the clamping mechanisms are working, they can clamp the corresponding extension rods. The telescopic element cooperates with the transfer seat to drive the transfer seat to move linearly.

2. The continuous waste heat recovery equipment according to claim 1, characterized in that: It also includes a rotating mechanism, wherein the rotating shaft of the rotating mechanism is fixed to the telescopic element, and the axis of the rotating shaft is perpendicular to the movement direction of the telescopic element.

3. The continuous waste heat recovery equipment according to claim 1, characterized in that: The inner wall of the space is provided with a mounting groove arranged along the circumference of the space, and a sealing member is further provided in the shell. The sealing member is arranged in the mounting groove and is used for sealing the outer wall of the sleeve on the mounting plate.

4. The continuous waste heat recovery equipment according to claim 3, characterized in that: The cross section of the sealing member is a right-angled trapezoid having a short base, a long base, a short waist and a long waist. The long waist is tilted relative to the axis of the shell, and the short base is located on the side away from the first part.

5. The continuous waste heat recovery equipment according to claim 1, characterized in that: The inner wall of the space is provided with a slide groove, and the mounting plate is provided with a slider which is slidably matched with the slide groove. When the slider abuts against the end of the slide groove, the mounting plate is sleeved on the sealing member.

6. The continuous waste heat recovery equipment according to claim 5, characterized in that: The portion of the extension rod located outside the sealing cover plate is provided with a limiting convex ring, and the end portion of the clamping mechanism abuts against the limiting convex ring.

7. The continuous waste heat recovery equipment according to claim 6, characterized in that: The two sets of clamping mechanisms are respectively mounted on the two extension rods.

8. The continuous waste heat recovery equipment according to claim 7, characterized in that: The clamping mechanism is an electric three-jaw chuck.

9. The continuous waste heat recovery equipment according to claim 1, characterized in that: The first control valve and the second control valve are both electric control valves.

10. The continuous waste heat recovery equipment according to claim 1, characterized in that: The shell is a hollow cylindrical shell, and the first space and the second space are symmetrical relative to the heat insulation partition.

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