On-site waste heat utilization device of shield machine and waste heat utilization method of shield machine

Abstract

The present invention discloses an on-site device and method for utilizing waste heat from a shield machine. The device comprises: a drainage pipe having a head end for connecting to the water outlet of the shield machine's cooling system and a tail end for connecting to the water inlet of the cooling system; a heat-absorbing sleeve sleeved over the drainage pipe, the interior of the sleeve forming a cavity; an outer wall of the sleeve defining a drain outlet and a water inlet for connecting to a cooling water source; the cavity having a first end proximate to the head end and a second end proximate to the tail end; a return pipe connecting the first and second ends, the return pipe being equipped with a delivery pump; and a steam generator for steaming prefabricated components on-site, connected to the drain outlet. The present invention solves the problem of waste heat from existing shield machine cooling systems failing to be effectively recycled and utilized, resulting in energy waste.

Description

Technical Field

[0001] The present invention relates to the technical field of shield machines, and in particular to a waste heat on-site utilization device of a shield machine and a waste heat utilization method of a shield machine. Background Art

[0002] With the development of my country's economy and cities, subway construction has become a crucial aspect of transportation infrastructure. While the shield tunneling method has become the mainstream method for subway construction due to its unique advantages, the shield machine (TBM) is a major infrastructure tool that consumes enormous amounts of electricity and generates significant heat. During normal operation, the water flowing through the shield machine's cooling system (or cooling system) reaches temperatures as high as 85 to 90 degrees Celsius. This water's heat energy is converted from the electricity consumed by the shield machine, but this heat energy is not effectively recycled, resulting in energy waste.

[0003] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0004] In order to overcome the defects of the existing technology, a waste heat on-site utilization device and a waste heat utilization method of a shield machine are provided to solve the problem that the waste heat of the existing shield machine cooling system cannot be effectively recovered and utilized, resulting in energy waste.

[0005] To achieve the above-mentioned purpose, a shield machine waste heat on-site utilization device is provided, comprising:

[0006] A drainage pipe having a head end for connecting to a water outlet end of a cooling system of a shield machine and a tail end for connecting to a water inlet end of the cooling system;

[0007] a heat absorbing sleeve, sleeved on the outside of the drainage pipe, wherein a housing cavity is formed inside the pipe wall of the heat absorbing sleeve, a drain port and a water inlet for connecting to a cooling water source are opened on the outer wall of the heat absorbing sleeve, and the housing cavity has a first end close to the head end and a second end close to the tail end;

[0008] a return pipe connected to the first end and the second end, wherein the return pipe is equipped with a delivery pump; and

[0009] A steam generator for steaming prefabricated components on site is connected to the drain outlet.

[0010] Furthermore, the drain outlet and the water inlet are respectively equipped with control valves.

[0011] Furthermore, the drainage tube is U-shaped, and the shape of the heat absorption sleeve is adapted to the shape of the drainage tube.

[0012] Furthermore, the drainage tube includes:

[0013] Two straight sections arranged opposite to each other, each having an opposite third end and a fourth end, the third end of one straight section being connected to a water outlet of a cooling system of a shield machine, and the third end of the other straight section being connected to a water inlet of the cooling system, the drain opening being provided in one straight section, and the water inlet being provided in the other straight section; and

[0014] The special-shaped section is wavy and connected between the third ends of the two straight sections. The heat-absorbing sleeve includes two straight sleeves and a heat exchange box. The two straight sleeves are respectively sleeved on the outside of the two straight sections and connected to the heat exchange box. The special-shaped section is arranged in the heat exchange box. The two straight sections respectively pass through the heat exchange box. The return pipe is connected to the straight sleeves.

[0015] Furthermore, the heat absorbing sleeve includes:

[0016] an inner ring tube, sleeved on the outside of the drainage tube, with the inner sidewall of the inner ring tube being in contact with the outer sidewall of the drainage tube;

[0017] an outer ring tube, sleeved on the outside of the ring tube; and

[0018] The end sealing plate is sealed between the end of the outer ring tube and the end of the inner ring tube. The outer ring tube, the inner ring tube and the end sealing plate enclose the accommodating cavity.

[0019] The present invention provides a method for utilizing waste heat of a shield machine using an on-site waste heat utilization device of the shield machine, comprising the following steps:

[0020] Connecting the head end of the drainage pipe to the water outlet of the shield machine's cooling system, and connecting the tail end of the drainage pipe to the water inlet of the cooling system, so that the high-temperature water discharged from the shield machine's cooling system flows into the drainage pipe through the head end;

[0021] Connecting the water inlet of the heat absorbing sleeve to a cooling water source so that the accommodating cavity contains cooling water and the cooling water in the heat absorbing sleeve absorbs the high-temperature water in the drainage pipe;

[0022] Turn on the delivery pump to discharge the cooling water that has absorbed the heat of the high-temperature water into the steam generator through the return pipe;

[0023] The steam generator uses the cooling water that absorbs the heat of the high-temperature water to generate steam for steaming the prefabricated components at the construction site of the shield machine.

[0024] The beneficial effect of the present invention is that the on-site utilization device of the waste heat of the shield machine of the present invention utilizes the waste heat of the shield machine as a heat source for curing prefabricated components at the shield construction site, which is a low-carbon construction method. The heat-absorbing sleeve is modified based on the drainage pipe of the high-temperature hot water (85-90°C) flowing out of the cooling system of the shield machine, reducing material consumption and loss. On the other hand, the heat-absorbing sleeve is combined with the steam generator, which has a simple structure and is easy to use. It can effectively recover the waste heat of the cooling system of the shield machine and recycle it for curing prefabricated components at the shield machine construction site, saving resources and reducing the cost of shield construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 Schematic diagram of the structure of a waste heat on-site utilization device for a shield machine according to an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of the structure of a heat exchange box according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Reference Figure 1 and Figure 2 As shown, the present invention provides a waste heat on-site utilization device for a shield machine, comprising: a drainage pipe 1, a heat absorbing sleeve 2, a return pipe 3, and a steam generator 4.

[0031] In this embodiment, the drainage pipe 1 has a head end for connecting to a water outlet end of a cooling system of a shield machine and a tail end for connecting to a water inlet end of the cooling system.

[0032] The heat absorbing sleeve 2 is sleeved on the outside of the drainage tube 1. The interior of the tube wall of the heat absorbing sleeve 2 forms an accommodating cavity. The accommodating cavity has a first end close to the head end and a second end close to the tail end.

[0033] The outer wall of the heat absorbing sleeve 2 is provided with a drain port and a water inlet. The water inlet is used to connect to a cooling water source. In this embodiment, the water inlet is connected to a cooling water source (such as a clean water tank) via a water supply pipe 51.

[0034] The return pipe 3 is connected to the first end and the second end of the accommodating cavity of the heat absorbing sleeve 2. The return pipe 3 is equipped with a delivery pump.

[0035] The steam generator 4 is connected to the drain outlet of the heat absorbing sleeve 2. The steam generator 4 is used for steam curing of on-site prefabricated components.

[0036] In this embodiment, the drain outlet and the water inlet are respectively equipped with a control valve. The control valve is used to control the water inlet flow or the water outlet flow. The drain outlet is connected to the steam generator 4 through the outlet pipe 52.

[0037] In this embodiment, if Figure 1 As shown, the drainage tube 1 is U-shaped, and the shape of the heat absorbing sleeve 2 is adapted to the shape of the drainage tube 1 .

[0038] In some embodiments, as Figure 2 As shown, the drainage tube 1 includes two straight sections 11 and a special-shaped section 12 .

[0039] Two straight sections 11 are disposed opposite each other. Each straight section 11 has opposing third and fourth ends. The third end of one straight section 11 is connected to the water outlet of the shield machine's cooling system. The third end of the other straight section 11 is connected to the water inlet of the cooling system. A drain outlet is provided on one straight section 11, and a water inlet is provided on the other straight section 11.

[0040] The special-shaped section 12 is wavy and connected between the third ends of the two straight sections 11.

[0041] Accordingly, the heat-absorbing sleeve 2 includes two straight sleeves 21 and a heat exchange box 22. The two straight sleeves 21 are respectively mounted outside the two straight sections 11 and connected to the heat exchange box 22. The shaped section 12 is disposed within the heat exchange box 22. The two straight sections 11 respectively penetrate the heat exchange box 22. The return pipe 3 is connected to the straight sleeves 21.

[0042] The heat exchange tank is used to accommodate a large amount of cooling water to improve heat recovery efficiency.

[0043] exist Figure 1 and Figure 2 In the figure, the flow direction of the high-temperature water of the shield machine is represented by the dotted arrow line, and the flow direction of the cooling water is represented by the solid arrow line.

[0044] As a preferred embodiment, the heat absorbing sleeve 2 comprises: an inner ring tube a, an outer ring tube b and an end capping plate c. The inner diameter of the inner ring tube is adapted to the outer diameter of the drainage tube.

[0045] The inner ring tube a is sleeved on the outside of the drainage tube 1. The inner side wall of the inner ring tube a is in contact with the outer side wall of the drainage tube 1. The outer ring tube b is sleeved on the outside of the ring tube.

[0046] The end plate c is sealed between the end of the outer ring tube b and the end of the inner ring tube a. The outer ring tube b, the inner ring tube a and the end plate c enclose a receiving cavity.

[0047] In some embodiments, the inner annular tube is an optional component, and the outer annular tube is sleeved outside the drainage tube between the end sealing plates. The end sealing plates, the outer annular tube and the outer side wall of the drainage tube enclose the accommodating cavity.

[0048] The on-site waste heat utilization device of the shield machine of the present invention utilizes the waste heat of the shield machine as a heat source for curing prefabricated components at the shield construction site, which is a low-carbon construction method. The heat-absorbing sleeve is modified based on the drainage pipe of the high-temperature hot water (85-90°C) flowing out of the cooling system of the shield machine, reducing material consumption and loss. On the other hand, the heat-absorbing sleeve is combined with the steam generator, which has a simple structure and is easy to use. It effectively recovers the waste heat of the cooling system of the shield machine and recycles it for curing prefabricated components at the shield machine construction site, saving resources and reducing the cost of shield construction.

[0049] The present invention provides a construction method for a waste heat on-site utilization device of a shield machine, comprising the following steps:

[0050] S1: Connect the head end of the drainage pipe 1 to the water outlet end of the shield machine's cooling system, and connect the tail end of the drainage pipe 1 to the water inlet end of the cooling system, so that the high-temperature water discharged from the shield machine's cooling system flows into the drainage pipe 1 through the head end.

[0051] S2: Connect the water inlet of the heat absorbing sleeve 2 to a cooling water source, so that the accommodating cavity contains cooling water to allow the cooling water in the heat absorbing sleeve 2 to absorb the high-temperature water in the drainage tube 1.

[0052] S3: Turn on the delivery pump to discharge the cooling water that has absorbed the heat of the high-temperature water into the steam generator 4 through the return pipe 3.

[0053] S4: The steam generator 4 uses the cooling water that absorbs the heat of the high-temperature water to generate steam to steam the prefabricated components at the construction site of the shield machine.

[0054] The steam generator uses cooling water that has absorbed the heat of high-temperature water (cooling water at room temperature that has become hot) as raw water to generate steam. Compared with directly using room-temperature cooling water to generate steam, energy consumption is greatly reduced.

[0055] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A waste heat on-site utilization device for a shield machine, characterized in that: include: A drainage pipe having a head end for connecting to a water outlet end of a cooling system of a shield machine and a tail end for connecting to a water inlet end of the cooling system; a heat absorbing sleeve, sleeved on the outside of the drainage pipe, wherein a housing cavity is formed inside the pipe wall of the heat absorbing sleeve, a drain port and a water inlet for connecting to a cooling water source are opened on the outer wall of the heat absorbing sleeve, and the housing cavity has a first end close to the head end and a second end close to the tail end; a return pipe connected to the first end and the second end, wherein the return pipe is equipped with a delivery pump; as well as A steam generator for steaming prefabricated components on site is connected to the drain outlet.

2. The on-site waste heat utilization device of a shield machine according to claim 1, characterized in that: The drain port and the water inlet are respectively equipped with control valves.

3. The on-site waste heat utilization device of a shield machine according to claim 1, characterized in that: The drainage tube is U-shaped, and the shape of the heat absorbing sleeve is adapted to the shape of the drainage tube.

4. The on-site waste heat utilization device of a shield machine according to claim 1, characterized in that: The drainage tube comprises: Two straight sections arranged opposite to each other, each having an opposite third end and a fourth end, the third end of one straight section being connected to a water outlet of a cooling system of a shield machine, and the third end of the other straight section being connected to a water inlet of the cooling system, the drain opening being provided in one straight section, and the water inlet being provided in the other straight section; and The special-shaped section is wavy and connected between the third ends of the two straight sections. The heat-absorbing sleeve includes two straight sleeves and a heat exchange box. The two straight sleeves are respectively sleeved on the outside of the two straight sections and connected to the heat exchange box. The special-shaped section is arranged in the heat exchange box. The two straight sections respectively pass through the heat exchange box. The return pipe is connected to the straight sleeves.

5. The on-site waste heat utilization device of a shield machine according to claim 1, characterized in that: The heat absorbing sleeve comprises: an inner ring tube, sleeved on the outside of the drainage tube, with the inner sidewall of the inner ring tube being in contact with the outer sidewall of the drainage tube; an outer ring tube, sleeved on the outside of the ring tube; and The end sealing plate is sealed between the end of the outer ring tube and the end of the inner ring tube. The outer ring tube, the inner ring tube and the end sealing plate enclose the accommodating cavity.

6. A method for utilizing waste heat from a shield machine using the on-site waste heat utilization device for a shield machine according to any one of claims 1 to 5, characterized in that: The following steps are involved: Connecting the head end of the drainage pipe to the water outlet of the shield machine's cooling system, and connecting the tail end of the drainage pipe to the water inlet of the cooling system, so that the high-temperature water discharged from the shield machine's cooling system flows into the drainage pipe through the head end; Connecting the water inlet of the heat absorbing sleeve to a cooling water source so that the accommodating cavity contains cooling water and the cooling water in the heat absorbing sleeve absorbs the high-temperature water in the drainage pipe; Turn on the delivery pump to discharge the cooling water that has absorbed the heat of the high-temperature water into the steam generator through the return pipe; The steam generator uses the cooling water that absorbs the heat of the high-temperature water to generate steam for steaming the prefabricated components at the construction site of the shield machine.

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