Pipeline tail end steam waste heat recovery device

Abstract

The utility model relates to the technical field of heat energy recovery, in particular to a pipeline tail end steam waste heat recovery device which comprises a boiler, a steam recovery pipe connected to the boiler, a waste heat collection box installed on the steam recovery pipe and a heat exchange plate installed in the waste heat collection box. The heat exchange plate is provided with a waste heat recovery mechanism; the waste heat recovery mechanism comprises a cold water tank and a waste heat storage structure, the cold water tank is provided with a supply pump, and the drainage end of the supply pump is connected with a heat conduction water pipe. According to the utility model, cold water in the cold water tank firstly passes through the steam with reduced temperature, firstly, the heat conduction water pipe on the inner side of the waste heat storage structure is preheated, secondly, the steam waste heat is fully utilized and recycled, and thirdly, the steam with unreduced temperature firstly conducts heat to heat the preheated water source, so that condensed water generated when the steam encounters cold can be effectively reduced; and 4, the cold water can increase the generation of condensed water for the steam with reduced temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery technology, specifically to a waste heat recovery device for steam at the end of a pipeline. Background Technology

[0002] In industrial production, high-pressure steam is generated in some processes. This high-pressure steam carries a large amount of heat energy. Recovering and utilizing the waste heat from this high-pressure steam is an important method of secondary energy utilization, which can improve energy efficiency, reduce energy consumption, achieve energy conservation and emission reduction, and reduce enterprise expenses. A Chinese patent (authorization announcement number CN216385164U) discloses a steam waste heat recovery device, including a boiler, a water storage tank, and a water supply pipe connecting the boiler and the water storage tank. It also includes a heat exchange box, a cold water tank, a steam recovery pipe connecting the boiler and the heat exchange box, an exhaust pipe connecting the heat exchange box and the water storage tank, a heat exchange plate inside the heat exchange box, an inlet and an outlet on the heat exchange plate, a heat exchange channel inside the heat exchange plate connecting the inlet and outlet, an inlet pipe connecting the inlet and the cold water tank, and an outlet pipe connecting the outlet and the water storage tank. This invention injects steam from a steam recovery pipe into a heat exchange box. Cold water entering the storage tank absorbs heat from the steam through heat exchange plates, while the remaining steam is injected back into the storage tank. This fully utilizes the waste heat of the steam, raising the water temperature in the storage tank. This allows for efficient use of high-pressure steam waste heat, improving energy efficiency and reducing energy consumption. This patented technology solves the problem that most steam waste heat recovery devices on the market are functionally limited and inconvenient to use. Traditional steam waste heat recovery devices often only initially absorb the high-temperature heat carried by the steam, while the low-temperature heat is directly released, leading to waste of waste heat.

[0003] However, in the existing technology, when steam first passes through a water source with a lower temperature, the pre-cooled steam at high temperature is prone to producing more condensate, which reduces the efficiency of steam waste heat recovery. It is necessary to solve the problem of fully utilizing steam waste heat in the existing technology.

[0004] Therefore, those skilled in the art have provided a pipeline end steam waste heat recovery device to solve the problems mentioned in the background art. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides:

[0006] A waste heat recovery device for pipeline ends includes: a boiler, and a steam recovery pipe connected to it, wherein the steam recovery pipe is equipped with a waste heat collection box and a heat exchange plate installed inside the waste heat collection box; the heat exchange plate is equipped with a waste heat recovery mechanism; and the waste heat recovery mechanism includes a cold water tank and a waste heat storage structure, wherein the cold water tank is equipped with a supply pump, and the drain end of the supply pump is connected to a heat conduction water pipe, wherein the heat conduction water pipe first spirals through the interior of the waste heat storage structure, and then passes through the heat exchange plate in a square disc shape.

[0007] Preferably, the waste heat storage structure includes a hot water tank that is connected in connection with a heat conduction water pipe, and the outer wall of the hot water tank is a heat-conducting layer.

[0008] The heat-conducting layer is made of aluminum alloy.

[0009] Preferably, the outer layer of the thermally conductive layer is provided with a corrosion-resistant layer.

[0010] The corrosion-resistant layer is made of titanium alloy.

[0011] Preferably, the waste heat storage structure includes an inner protective box, and an isolation spiral plate is integrally fixed between the inner protective box and the corrosion-resistant layer.

[0012] The inner protective box and the corrosion-resistant layer are made of the same material, and the isolation spiral plate is used to allow hot steam to pass through from bottom to top.

[0013] Preferably, the inner protective box is provided with an insulation layer on the outside, and the insulation layer is provided with an outer protective box on the outside.

[0014] The insulation layer is a heat insulation board, and the outer protective box is made of stainless steel.

[0015] Preferably, a steam pipe is installed at the top of the waste heat storage structure.

[0016] The steam pipe passes through the outer protective box and the insulation layer, and the inner protective box is located inside the isolation spiral plate.

[0017] Preferably, a support frame is fixedly assembled on the outer wall of the waste heat storage structure, and a condensate storage tank is fixedly assembled at the bottom end of the support frame.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] In this invention, the cold water in the cold water tank first passes through steam that has reduced its temperature. This serves several purposes: firstly, it preheats the heat conduction water pipes inside the waste heat storage structure; secondly, it fully utilizes the waste heat recovery from the steam; thirdly, the steam that has not reduced its temperature first conducts heat to heat the preheated water source, which can effectively reduce the condensation caused by the steam encountering cold; and fourthly, the cold water passing through the steam that has reduced its temperature can increase the generation of condensation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a pipeline end steam waste heat recovery device provided in an embodiment of this application;

[0021] Figure 2 This is a top view of a waste heat recovery device for a pipeline end provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the waste heat recovery mechanism in a pipeline end steam waste heat recovery device provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the heat conduction water pipe in a pipeline end steam waste heat recovery device provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the isolation spiral plate in a pipeline end steam waste heat recovery device provided in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the structure at point A in a pipeline end steam waste heat recovery device provided in an embodiment of this application.

[0026] In the picture:

[0027] 1. Boiler; 2. Steam recovery pipe; 3. Waste heat collection box; 4. Heat exchange plate;

[0028] 5. Waste heat recovery mechanism; 501. Cold water tank; 502. Supply pump; 503. Heat conduction water pipe;

[0029] 54. Waste heat storage structure; 541. Outer protective box; 542. Insulation layer; 543. Inner protective box; 544. Corrosion-resistant layer; 545. Heat-conducting layer; 546. Hot water tank; 547. Steam pipe; 548. Isolation spiral plate;

[0030] 505. Control Table 1; 506. Control Table 2; 507. Support frame; 508. Discharge pump; 509. Condensate funnel; 510. Condensate storage tank; 511. Discharge pipe; 512. Circulation pump. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example

[0032] Please see Figures 1-6 This embodiment provides a pipeline end steam waste heat recovery device, including: a boiler 1, and a steam recovery pipe 2 connected to it, wherein the steam recovery pipe 2 is equipped with a waste heat collection box 3, and a heat exchange plate 4 is installed inside the waste heat collection box 3, and a steam control valve is installed between the steam recovery pipe 2 and the waste heat collection box 3; the heat exchange plate 4 is equipped with a waste heat recovery mechanism 5; and the waste heat recovery mechanism 5 includes a cold water tank 501 and a waste heat storage structure 54, wherein the cold water tank 501 is equipped with a supply pump 502, and the drain end of the supply pump 502 is connected to a heat conduction water pipe 503, wherein the heat conduction water pipe 503 is first spirally wound through the interior of the waste heat storage structure 54, and then the heat conduction water pipe 503 is square-shaped and passes through the heat exchange plate 4.

[0033] Preferably, the waste heat storage structure 54 includes a hot water tank 546 that is connected in connection with the heat conduction water pipe 503, and the outer wall of the hot water tank 546 is a heat-conducting layer 545.

[0034] The thermal conductive layer 545 is made of aluminum alloy.

[0035] Preferably, the outer layer of the thermally conductive layer 545 is provided with a corrosion-resistant layer 544.

[0036] The corrosion-resistant layer 544 is made of titanium alloy.

[0037] Preferably, the waste heat storage structure 54 includes an inner protective box 543, and an isolation spiral plate 548 is integrally fixed between the inner protective box 543 and the corrosion-resistant layer 544.

[0038] The inner protective box 543 and the corrosion-resistant layer 544 are made of the same material, and the isolation spiral plate 548 is used to allow hot steam to pass through from bottom to top.

[0039] Preferably, the inner protective box 543 is provided with an insulation layer 542 on the outside, and the insulation layer 542 is provided with an outer protective box 541 on the outside.

[0040] The insulation layer 542 is a heat insulation board, and the outer protective box 541 is made of stainless steel.

[0041] Preferably, a steam pipe 547 is installed at the top of the waste heat storage structure 54.

[0042] The steam pipe 547 passes through the outer protective box 541 and the insulation layer 542. The inner protective box 543 is located inside the isolation spiral plate 548. The outer wall of the cold water tank 501 is equipped with a control meter 505. The control meter 505 has built-in pressure sensor, water level sensor and other sensors that can monitor the inside of the cold water tank 501 in real time.

[0043] The outer wall of the outer protective box 541 is equipped with a control gauge 506. The control gauge 506 has built-in pressure sensor, water level sensor, temperature sensor and other sensors that can monitor the inside of the hot water tank 546 in real time.

[0044] The bottom of the hot water tank 546 is connected to a discharge pump 508, which is used to discharge the heated hot water inside the hot water tank 546. A circulation pump 512 is installed between the hot water tank 546 and the cold water tank 501. When the water temperature inside the hot water tank 546 is low, the circulation pump 512 can be started to discharge the water into the cold water tank 501 for reheating. (If the boiler 1 is not in use, resulting in the inability to recover waste heat, the circulation pump 512 can be started to circulate the hot water recovered from the waste heat inside the hot water tank 546 into the cold water tank 501 after it cools down.)

[0045] A condensate funnel 509 is sealed between the condensate storage tank 510, the inner protective tank 543, and the corrosion-resistant layer 544.

[0046] Preferably, a support frame 507 is fixedly assembled on the outer wall of the waste heat storage structure 54, and a condensate storage tank 510 is fixedly assembled at the bottom of the support frame 507.

[0047] The condensate storage tank 510 is connected to a discharge pipe 511, and a valve body is installed on the discharge pipe 511.

[0048] Working principle:

[0049] When recovering the waste heat of steam from boiler 1, the supply pump 502 of the cold water tank 501 (the water level of the cold water tank 501 is monitored by control meter 505 and connected to an external water pipe with a solenoid valve for adding water) is started. The supply pump 502 draws the water inside the cold water tank 501 into the heat conduction water pipe 503. The water first flows from bottom to top through the heat conduction water pipe 503 along the internal circulation of the isolation spiral plate 548 to the heat exchange plate 4.

[0050] The high-temperature steam inside the steam recovery pipe 2 will first pass through the waste heat collection box 3 and then be discharged into the waste heat storage structure 54, and then pass through the heat conduction water pipe 503 along the isolation spiral plate 548.

[0051] The steam temperature is reduced after passing through the isolation spiral plate 548. The cold water in the cold water tank 501 first passes through the reduced-temperature steam. Firstly, it preheats the heat conduction water pipe 503 inside the waste heat storage structure 54. Secondly, it makes full use of the waste heat recovery of the steam. Thirdly, the steam that has not been reduced in temperature first conducts heat to heat the preheated water source, which can effectively reduce the condensation caused by the steam encountering cold. Fourthly, the cold water can increase the generation of condensation by passing through the reduced-temperature steam.

[0052] The preheated water source is fully heated by high-temperature steam inside the heat exchange plate 4 through the heat conduction water pipe 504 and then directly discharged into the hot water tank 546. The steam passing through the heat exchange plate 4 is discharged into the bottom of the isolation spiral plate 548 through the pipe. It gradually rises along the isolation spiral plate 548, increasing the contact time between the heat conduction water pipe 503 and the steam, while increasing the cooling efficiency of the steam waste heat. The condensate is collected in the condensate storage tank 510 through the condensate funnel 509.

[0053] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A waste heat recovery device for steam at the end of a pipeline, comprising: A boiler (1), and a steam recovery pipe (2) connected thereto, wherein the steam recovery pipe (2) is equipped with a waste heat collection box (3) and a heat exchange plate (4) installed inside the waste heat collection box (3); characterized in that the heat exchange plate (4) is equipped with a waste heat recovery mechanism (5). Furthermore, the waste heat recovery mechanism (5) includes a cold water tank (501) and a waste heat storage structure (54). The cold water tank (501) is equipped with a supply pump (502). The drain end of the supply pump (502) is connected to a heat conduction water pipe (503). The heat conduction water pipe (503) first spirals through the interior of the waste heat storage structure (54), and then passes through the heat exchange plate (4) in a square disc shape.

2. The pipeline end steam waste heat recovery device according to claim 1, characterized in that, The waste heat storage structure (54) includes a hot water tank (546) that is connected in communication with the heat conduction water pipe (503), and the outer wall of the hot water tank (546) is a heat-conducting layer (545).

3. A pipeline end steam waste heat recovery device according to claim 2, characterized in that, The outer layer of the thermally conductive layer (545) is provided with a corrosion-resistant layer (544).

4. A pipeline end steam waste heat recovery device according to claim 2, characterized in that, The waste heat storage structure (54) includes an inner protective box (543), and an isolation spiral plate (548) is integrally fixed between the inner protective box (543) and the corrosion-resistant layer (544).

5. A pipeline end steam waste heat recovery device according to claim 4, characterized in that, The inner protective box (543) is provided with an insulation layer (542) on the outside, and the insulation layer (542) is provided with an outer protective box (541) on the outside.

6. A pipeline end steam waste heat recovery device according to claim 2, characterized in that, The waste heat storage structure (54) is equipped with a steam pipe (547) at its top.

7. A pipeline end steam waste heat recovery device according to claim 6, characterized in that, The outer wall of the waste heat storage structure (54) is fixedly fitted with a support frame (507), and the bottom end of the support frame (507) is fixedly fitted with a condensate storage tank (510).

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