High-pressure condensate water pressure difference recovery structure and method

Abstract

The present invention relates to the technical field of condensate recovery, and discloses a high-pressure condensate pressure difference recovery structure and method, including: a condensate output pipe, the condensate output pipe extends into a condensate tank, and the lower end of the condensate output pipe is located at the lower part of the condensate tank; a steam booster pipe, the two ends of the steam booster pipe are respectively connected to a steam supply device and a condensate tank; an inlet valve, the inlet valve is arranged on a heat exchange pipe and is located between the heat exchanger and the condensate tank; a steam pressure input valve, the steam pressure input valve is arranged on the steam booster pipe. The high-pressure condensate pressure difference recovery structure disclosed in the present invention uses the steam supply device provided in the steam heating system and pressurizes the condensate tank through the steam booster pipe, and the water in the condensate tank flows into the condensate output pipe through the siphon effect, thereby providing power to transport the condensate to different places for recycling.

Description

Technical Field

[0001] The present invention relates to the technical field of condensed water recovery, and in particular to a high-pressure condensed water pressure difference recovery structure and method. Background Art

[0002] When steam is used to heat an object, condensate will inevitably be produced. For the treatment of condensate and steam, the usual practice is to install a steam trap at the end of the steam pipeline, and discharge the condensate by opening and closing the steam trap. When the steam trap is used to discharge the condensate, part of the steam is also discharged, and the temperature of the discharged condensate is relatively high, which can reach about 70°C. Since high-temperature condensate is easily damaged by using a water pump to lift it, currently high-temperature condensate is not equipped with additional power and can only flow to a lower place by its own weight. There is no way to effectively recycle and utilize the condensate, resulting in a waste of condensate and heat. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] The present invention provides a high-pressure condensed water pressure difference recovery structure, comprising a steam supply device, a heat exchange tube, a heat exchanger and a condensed water tank; the two ends of the heat exchange tube are respectively connected to the steam supply device and the condensed water tank, the heat exchanger is arranged between the steam supply device and the condensed water tank, and the heat exchanger performs heat exchange with the heat exchange tube; the high-pressure condensed water pressure difference recovery structure also includes:

[0005] A condensed water output pipe, the condensed water output pipe extends into the condensed water tank, and the lower end of the condensed water output pipe is located at the lower part of the condensed water tank;

[0006] A steam booster pipe, both ends of which are connected to the steam supply device and the condensate tank respectively;

[0007] A water inlet valve, the water inlet valve is arranged on the heat exchange tube and is located between the heat exchanger and the condensed water tank;

[0008] A steam pressure input valve is provided on the steam booster pipe.

[0009] Beneficial effects of the present invention: The high-pressure condensate pressure difference recovery structure disclosed in the present invention utilizes the steam supply device provided in the steam heating system and pressurizes the condensate tank through the steam booster pipe, and the water in the condensate tank flows into the condensate output pipe through the siphon effect, thereby providing power to transport the condensate to different places for recycling.

[0010] When in use, the steam supply device delivers steam to the heat exchanger. After the steam exchanges heat with the heat exchanger, it cools down and becomes condensed water, which flows into the condensate tank. The water inlet valve cuts off the passage between the condensate tank and the heat exchanger. The steam pressure input valve opens the passage between the steam booster pipe and the condensate tank. The steam acts on the condensate tank through the steam booster pipe. The mouth of the condensate output pipe in the condensate tank is below the condensate liquid level. The condensate is then delivered to other locations through the condensate output pipe in a power delivery manner. For example, it is delivered to the boiler for reuse, which improves the boiler's working efficiency and reduces energy consumption.

[0011] As some sub-schemes of the above technical scheme, the high-pressure condensate pressure difference recovery structure also includes a steam return pipe, one end of the steam return pipe is connected to the upper part of the condensate tank, and the other end is connected to the heat exchange pipe, and a steam recovery valve is provided at the steam return pipe.

[0012] As some sub-solutions of the above technical solution, a water outlet valve is also provided on the condensate output pipe.

[0013] As some sub-solutions of the above technical solution, a fifth on-off valve is further provided at the connection between the steam recycling pipe and the heat exchange pipe, and the fifth on-off valve is arranged adjacent to the heat exchange pipe.

[0014] As some sub-solutions of the above technical solution, a first water level sensor and a second water level sensor are further provided in the condensation water tank, and the first water level sensor is arranged at a higher height than the second water level sensor.

[0015] As some sub-schemes of the above technical scheme, the high-pressure condensed water pressure differential recovery structure also includes a controller, and the water inlet valve, steam pressure input valve, steam recovery valve, and water outlet valve are all electrically controlled valves, and the water inlet valve, steam pressure input valve, steam recovery valve, water outlet valve, first water level sensor, and second water level sensor are all electrically connected to the controller.

[0016] As some sub-solutions of the above technical solution, the second water level sensor is arranged at a height higher than the lower end of the condensed water output pipe.

[0017] As some sub-solutions of the above technical solution, a notch is provided on the lower end surface of the condensate output pipe.

[0018] The present disclosure also provides a high-pressure condensed water pressure difference recovery method, comprising:

[0019] Step 1: The steam generator passes the condensed water into the heat exchanger for heat exchange, and the cooled condensed water is stored in the condensed water tank;

[0020] Step 2: Close the passage between the condensate tank and the heat exchanger;

[0021] Step 3: Introduce high-pressure steam into the condensate tank so that the condensate in the condensate tank is discharged to the outside through the condensate output pipe extending to the bottom of the condensate tank.

[0022] As some sub-schemes of the above technical scheme, a steam reuse pipe is also connected to the condensate tank; the steam reuse pipe is in a closed state during Step 1, and the steam reuse pipe is opened after Step 3 is completed.

[0023] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0025] Figure 1 It is a schematic structural diagram of an embodiment of a high-pressure condensate water pressure difference recovery structure;

[0026] Figure 2 It is a schematic diagram of a high-pressure condensate water pressure difference recovery method.

[0027] In the drawings: 10 - steam supply device; 11 - heat exchange tube; 111 - water inlet valve; 12 - heat exchanger; 13 - condensate tank; 131 - first water level sensor; 132 - second water level sensor; 2 - condensate output pipe; 21 - water outlet valve; 3 - steam booster pipe; 31 - steam pressure input valve; 4 - steam reuse pipe; 41 - steam recovery valve; 42 - fifth on-off valve. Detailed Embodiment

[0028] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0029] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] In the description of the present invention, "several" means an indefinite quantity, "multiple" means more than two, "greater than", "less than", "exceeding", etc. are understood not to include the base number, and "above", "below", "within", etc. are understood to include the base number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features. The "and / or" appearing throughout the text represents three parallel solutions. For example, "A and / or B" represents the solution satisfied by A, the solution satisfied by B, or the solution satisfied by both A and B.

[0031] In the description of the present invention, if there are short sentences containing multiple parallel features, the attributive modifies the closest feature. For example, "B, C provided on A", "E connected to D" means that B is provided on A and E is connected to D, and C is not restricted; however, for attributives indicating the relationship between features, such as "spaced apart" and "circular arrangement", etc., this does not apply. If there is a "both" character before the attributive, it means that all features in the short sentence are restricted. For example, "B, C, D all provided on A" means that B, C, and D are all provided on A. For a sentence that omits the subject, the omitted subject is the subject of the previous sentence, that is, "B is provided on A, including C" means that B is provided on A and A includes C.

[0032] In the description of the present invention, unless otherwise clearly defined, words such as "provided", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0033] The following will Figure 1 describe the embodiments of the present invention.

[0034] This embodiment relates to a high-pressure condensate water pressure difference recovery structure, including a steam supply device 10, a heat exchange tube 11, a heat exchanger 12, and a condensate water tank 13; both ends of the heat exchange tube 11 are respectively communicated with the steam supply device 10 and the condensate water tank 13, the heat exchanger 12 is arranged between the steam supply device 10 and the condensate water tank 13, the heat exchanger 12 exchanges heat with the heat exchange tube 11, and the high-pressure condensate water pressure difference recovery structure further includes: a condensate water output pipe 2, a steam booster pipe 3, a water inlet valve 111, and a steam pressure input valve 31;

[0035] The condensate water output pipe 2 extends into the condensate water tank 13, and the lower end of the condensate water output pipe 2 is located in the lower part of the condensate water tank 13;

[0036] Both ends of the steam booster pipe 3 are respectively communicated with the steam supply device 10 and the condensate water tank 13;

[0037] The water inlet valve 111 is arranged on the heat exchange tube 11 and is located between the heat exchanger 12 and the condensed water tank 13;

[0038] The steam pressure input valve 31 is arranged on the steam booster pipe 3 .

[0039] The high-pressure condensate pressure difference recovery structure disclosed in the present invention utilizes the steam supply device 10 provided in the steam heating system and pressurizes the condensate tank 13 through the steam booster pipe 3, and causes the water in the condensate tank 13 to flow into the condensate output pipe 2 through the siphon effect, thereby providing power to transport the condensate to different places for recycling.

[0040] When in use, the steam supply device 10 delivers steam to the heat exchanger 12. After the steam exchanges heat with the heat exchanger 12, it cools down and becomes condensed water, which flows into the condensed water tank 13. The water inlet valve 111 cuts off the passage between the condensed water tank 13 and the heat exchanger 12. The steam pressure input valve 31 opens the passage between the steam booster pipe 3 and the condensed water tank 13. The steam acts on the condensed water tank 13 through the steam booster pipe 3. The mouth of the condensed water output pipe 2 in the condensed water tank 13 is located below the condensed water level. The condensed water is transported to other locations through the condensed water output pipe 2 in a power transmission manner. For example, it is transported to the boiler for reuse, thereby improving the working efficiency of the boiler and reducing energy consumption.

[0041] In order to make full use of the steam, the structure further includes a steam recycling pipe 4, one end of which is connected to the upper part of the condensate tank 13 and the other end is connected to the heat exchange pipe 11, and a steam recovery valve 41 is provided at the steam recycling pipe 4. By configuring the steam recycling pipe 4, after the steam presses out the condensate in the condensate tank 13, the steam can also return to the heat exchange pipe 11 through the steam recycling pipe 4 and be put into use again.

[0042] In order to improve the utilization rate of steam, further, the condensed water output pipe 2 is provided with a water outlet valve 21. When no water needs to flow through the condensed water output pipe 2, the passage of the condensed water output pipe 2 is closed by the water outlet valve 21, which is beneficial to further reduce the loss of steam and improve the utilization rate of steam.

[0043] In order to reduce the heat loss of steam, further, a fifth on-off valve 42 is provided at the connection between the steam return pipe 4 and the heat exchange pipe 11, and the fifth on-off valve 42 is provided adjacent to the heat exchange pipe 11. In actual installation, the length of the steam return pipe 4 may be as long as tens of meters. The fifth on-off valve 42 is provided at the connection position between the steam return pipe 4 and the heat exchange pipe 11, and is closed when the steam return pipe 4 is not needed, which can effectively reduce the heat loss of steam.

[0044] Further, a first water level sensor 131 and a second water level sensor 132 are also provided in the condensate water tank 13, and the installation height of the first water level sensor 131 is higher than that of the second water level sensor 132. The first water level sensor 131 and the second water level sensor 132 are configured in the condensate water tank 13 to sense the water level height in the condensate water tank 13, so as to select an optimal time to output condensate water, improve the efficiency of outputting condensate water, and save energy.

[0045] To improve the automation degree of this structure, the high-pressure condensate water pressure difference recovery structure further includes a controller. The water inlet valve 111, the steam pressure input valve 31, the steam recovery valve 41, and the water outlet valve 21 are all electrically controlled valves. The water inlet valve 111, the steam pressure input valve 31, the steam recovery valve 41, the water outlet valve 21, the first water level sensor 131, and the second water level sensor 132 are all electrically connected to the controller. The steam generator includes a boiler. In this embodiment, the condensate water output pipe 2 is connected to the boiler. By equipping the controller with electrical connections to the first water level sensor 131, the second water level sensor 132, the water inlet valve 111, the steam pressure input valve 31, the steam recovery valve 41, and the water outlet valve 21, the condensate water can be automatically circulated and introduced into the boiler for reuse, playing a role in saving energy.

[0046] Method of automatic cyclic operation: When the heat exchanger 12 is in a normal working state, the water inlet valve 111 is in an open state, and the steam pressure input valve 31 of the steam pressurization pipe 3, the water outlet valve 21 of the condensate water output pipe 2, and the steam recovery valve 41 on the steam reuse pipe 4 are all in a closed state;

[0047] The heat exchanger 12 continuously operates, and the steam is continuously cooled in the heat exchange tubes 11 to form condensed water, which is stored in the condensate tank 13. When the water level in the condensate tank 13 exceeds the first water level sensor 131 and the second water level sensor 132, the on-signal of the second water level sensor 132 is fed back to the controller. The controller closes the water inlet valve 111, opens the steam pressure input valve 31 and the water outlet valve 21. At this time, the steam is input into the condensate tank 13 through the steam booster pipe 3. The internal pressure of the sealed condensate tank 13 increases, and the condensed water is forced out through the condensate output pipe 2, and the water level drops. The on-signal of the first water level sensor 131 disappears, indicating that the condensed water is being forced out. Subsequently, the water level continues to drop until the on-signal of the second water level sensor 132 is interrupted. At this time, the controller sends a signal to close the steam pressure input valve 31 to stop the input of high-pressure steam, and the water outlet valve 21 of the condensate output pipe 2 closes with a delay. The condensed water in the condensate tank 13 will be discharged under the pressure difference and siphon effect. The discharge position can be directed to the boiler of the steam generator to recover the heat energy of the condensed water. After the water outlet valve 21 is closed with a delay, the steam recovery valve 41 in the steam reuse pipe 4 is opened, and the residual steam returns to the heat exchange tubes 11 along the steam reuse pipe 4 and is reused. After the pressure in the condensate tank 13 returns to normal, the controller closes the steam recovery valve 41 and opens the water inlet valve 111 to start a new cycle. This method simply realizes the recovery of condensed water and effectively improves the heat utilization efficiency. It can be understood that the condensed water discharged from the condensate tank 13 can be discharged to other places for reuse according to needs in addition to being discharged to the boiler of the steam generator.

[0048] Further, the installation height of the second water level sensor 132 is higher than the lower end of the condensate output pipe 2. The installation height of the second water level sensor 132 is higher than the lower end of the condensate output pipe 2, so as to ensure that when the second water level sensor 132 obtains the on-signal, the steam introduced into the condensate tank 13 can press the condensed water out of the condensate output pipe 2, and the condensed water in the condensate tank 13 can be discharged more fully.

[0049] In this embodiment, a notch is provided on the lower end surface of the condensate output pipe 2. Providing a notch at the lower end of the condensate output pipe 2 is beneficial to ensuring that the condensed water can be discharged from the condensate output pipe 2.

[0050] Refer to Figure 2 , this disclosure also provides an embodiment of the high-pressure condensate water pressure difference recovery method, including:

[0051] Step 1: The steam generator passes the condensed water into the heat exchanger 12 for heat exchange, and the cooled condensed water is stored in the condensate tank 13;

[0052] Step 2: Close the channel between the condensate tank 13 and the heat exchanger 12;

[0053] Step 3: Introduce high-pressure steam into the condensate tank 13, so that the condensate water in the condensate tank 13 is discharged to the outside through the condensate water output pipe 2 extending into the bottom of the condensate tank 13.

[0054] This method can discharge the condensate water without using an additional power device to provide power for the condensate water, and has the advantages of low cost and simple layout. High-pressure steam refers to steam with a pressure higher than atmospheric pressure in this embodiment.

[0055] Furthermore, a steam reuse pipe 4 is also connected to the condensate tank 13; the steam reuse pipe 4 is in a closed state during Step 1 and is opened after Step 3 is completed. The use of the steam reuse pipe 4 is beneficial to improving the utilization rate of steam.

[0056] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. High-pressure condensate water differential pressure recovery structure, comprising a steam supply device (10), heat exchange tubes (11), a heat exchanger (12) and a condensate water tank (13); both ends of the heat exchange tubes (11) are respectively communicated with the steam supply device (10) and the condensate water tank (13), the heat exchanger (12) is arranged between the steam supply device (10) and the condensate water tank (13), and the heat exchanger (12) exchanges heat with the heat exchange tubes (11). Characterized in that: It further comprises: A condensate water output pipe (2), the condensate water output pipe (2) extends into the condensate water tank (13), and the lower end of the condensate water output pipe (2) is located at the lower part of the condensate water tank (13). A steam booster pipe (3), both ends of the steam booster pipe (3) are respectively communicated with the steam supply device (10) and the condensate water tank (13). An inlet valve (111), the inlet valve (111) is arranged on the heat exchange tubes (11) and is located between the heat exchanger (12) and the condensate water tank (13). A steam pressure input valve (31), the steam pressure input valve (31) is arranged on the steam booster pipe (3).

2. The high-pressure condensate water differential pressure recovery structure according to claim 1, Characterized in that: It further comprises a steam reuse pipe (4), one end of the steam reuse pipe (4) is communicated with the upper part of the condensate water tank (13), the other end is communicated with the heat exchange tubes (11), and a steam recovery valve (41) is arranged at the steam reuse pipe (4).

3. The high-pressure condensate water differential pressure recovery structure according to claim 2, Characterized in that: An outlet valve (21) is further arranged on the condensate water output pipe (2).

4. The high-pressure condensate water differential pressure recovery structure according to claim 2, Characterized in that: A fifth on-off valve (42) is further arranged at the connection of the steam reuse pipe (4) and the heat exchange tubes (11), and the fifth on-off valve (42) is arranged adjacent to the heat exchange tubes (11).

5. The high-pressure condensate water differential pressure recovery structure according to claim 3, Characterized in that: A first water level sensor (131) and a second water level sensor (132) are further arranged in the condensate water tank (13), and the installation height of the first water level sensor (131) is higher than that of the second water level sensor (132).

6. The high-pressure condensate water differential pressure recovery structure according to claim 5, Characterized in that: The installation height of the second water level sensor (132) is higher than the lower end of the condensate water output pipe (2).

7. The high-pressure condensate water differential pressure recovery structure according to claim 5, Characterized in that: It further comprises a controller, the inlet valve (111), the steam pressure input valve (31), the steam recovery valve (41), and the outlet valve (21) are all electrically controlled valves, and the inlet valve (111), the steam pressure input valve (31), the steam recovery valve (41), the outlet valve (21), the first water level sensor (131), and the second water level sensor (132) are all electrically connected to the controller.

8. The high-pressure condensate water differential pressure recovery structure according to claim 1, Characterized in that: A notch is provided on the lower end surface of the condensate output pipe (2).

9. A high-pressure condensate water pressure difference recovery method based on the high-pressure condensate water pressure difference recovery structure according to any one of claims 1-8, characterized in that: It includes: Step 1: The steam generator passes the condensate water into the heat exchanger (12) for heat exchange, and the cooled condensate water is stored in the condensate water tank (13); Step 2: Close the channel between the condensate water tank (13) and the heat exchanger (12); Step 3: Pass high-pressure steam into the condensate water tank (13) so that the condensate water in the condensate water tank (13) is discharged to the outside through the condensate output pipe (2) extending into the bottom of the condensate water tank (13).

10. According to the high-pressure condensate water pressure difference recovery method described in claim 9, characterized in that: A steam reuse pipe (4) is also connected to the condensate water tank (13); the steam reuse pipe (4) is in a closed state during Step 1, and the steam reuse pipe (4) is opened after Step 3 is completed.

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