New heat supply network drainage temperature utilization method and device

Abstract

The invention relates to the technical field of heat supply network heater heat recovery, in particular to a new heat supply network drain water temperature utilization method and device. The drained water of the heat supply network is introduced into the heat exchanger; heat exchange is carried out through heat supply network drain water and a medium in the heat exchanger; and introducing the heat supply network drain water after heat exchange into a condenser. According to the new heat supply network drain water temperature utilization method and device, the heat supply network drain water is collected and stored through the water storage tank, and is introduced into the heat exchanger to heat the condensed water passing through the heat exchanger, so that the temperature of the heat supply network drain water entering the condenser is not too high, unit vacuum is not affected, and the temperature of the condensed water is increased.

Description

Technical Field

[0001] The invention relates to the technical field of heat recovery of heating network heaters, and in particular to a new method and device for utilizing the water-draining temperature of a heating network. Background Art

[0002] In the existing thermal energy utilization system, the drain temperature generated by the heat network heater is usually considered as a low-value thermal resource and has not been fully utilized. Although the utilization of drain temperature has been mentioned in some industrial applications, the existing technical solutions still have the following major defects: the current heat network heater system usually directly discharges the drain to the cooling system or recovery system. The disadvantage of this design is that the heat in the drain cannot be effectively recycled, resulting in energy waste. Summary of the invention

[0003] In view of the problems existing in the above-mentioned existing methods and devices for utilizing the drainage temperature of the new heating network, the present invention is proposed.

[0004] Therefore, one of the objects of the present invention is to provide a new method for utilizing the temperature of the water discharge from the heating network, the purpose of which is to efficiently utilize the temperature of the water discharge from the heating network.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a new method for utilizing the water-draining temperature of a heat network, comprising:

[0006] By draining the heat network;

[0007] By passing the drained hot network water into the heat exchanger;

[0008] Exchange heat with the medium in the heat exchanger through the heat network drain; and,

[0009] The water from the heat network after heat exchange is passed into the condenser.

[0010] As a preferred solution of the new method for utilizing the temperature of the heat network drain water of the present invention, the drained heat network drain water is collected and stored by multiple water storage tanks.

[0011] As a preferred solution of the method for utilizing the new heat network drain temperature of the present invention, an emergency expansion box is provided to be connected to the water storage tank, and the emergency expansion box is communicated with the drainage trough.

[0012] As a preferred solution of the method for utilizing the temperature of the new heat network drain water of the present invention, the drained heat network drain water is directly introduced into the heat exchanger through a direct current pipeline.

[0013] As a preferred solution of the method for utilizing the new heat network drain temperature of the present invention, an electric door and a manual door are installed on the DC pipeline.

[0014] The beneficial effects of this method are as follows: by collecting and storing the hot network drain water, and passing it into the heat exchanger to heat the condensate that passes through the heat exchanger, the temperature of the hot network drain water entering the condenser will not be too high, which will not affect the vacuum of the unit and increase the condensate temperature.

[0015] Therefore, another object of the present invention is to provide a new heating network drain water temperature utilization device, the purpose of which is to efficiently utilize the temperature of the heating network drain water.

[0016] In order to solve the above technical problems, the present invention provides the following technical solutions: a new heat network drain temperature utilization device, comprising:

[0017] Heater;

[0018] a collection assembly comprising a water storage tank connected to the heater; and,

[0019] A heat exchanger is connected to the water storage tank.

[0020] As a preferred solution of the new heat network drain temperature utilization device of the present invention, wherein: the heater is provided in plurality, and each heater is provided with a water outlet pipe, and a valve 1 is provided on the water outlet pipe;

[0021] The ends of the plurality of water outlet pipes are connected to a merging pipe 1.

[0022] As a preferred solution of the new heat network drain temperature utilization device of the present invention, wherein: the water storage tank is provided with a plurality of them, and all of them are connected to the merging pipe 1, and the plurality of water storage tanks are connected through the merging pipe 2;

[0023] The second confluence pipeline is connected to the heat exchanger, and both are provided with multiple sets of drain pumps.

[0024] As a preferred solution of the new heat network drain temperature utilization device described in the present invention, a direct current pipeline is provided between the merging pipeline 1 and the merging pipeline 2, and a valve 2 is provided on the direct current pipeline.

[0025] As a preferred solution of the new heat network drain temperature utilization device of the present invention, wherein: the water storage tank is also connected to an emergency expansion box, and the emergency expansion box is communicated with the drainage trough.

[0026] The beneficial effects of the present invention are as follows: the hot network drain water is collected and stored in the water storage tank, and is passed into the heat exchanger to heat the condensate water passing through the heat exchanger, so that the temperature of the hot network drain water entering the condenser is not too high, which does not affect the vacuum of the unit and increases the condensate water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the new method and device for utilizing the water-draining temperature of the heat network of the present invention. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a new method for utilizing the temperature of water drainage in a heat network, the method comprising:

[0034] S1. Drain the heat network;

[0035] The drainage can collect the hot network drain water generated in the multiple heaters 100, ensuring that the hot network drain water can directly enter the heat exchange system, avoiding the waste of hot network drain water;

[0036] The drain water from the heating network can be collected and stored by setting up a water storage tank 201, and there can be multiple water storage tanks 201 to collect and store the drain water from the heating network.

[0037] Furthermore, the multiple water storage tanks 201 are also connected to an emergency expansion tank 206, which can collect excess heat network drainage that cannot be collected in the water storage tanks 201 and pass it into the drainage trough to ensure the stable operation of the heater 100.

[0038] By draining and collecting the heat network drain, the amount of heat network drain after flow is stable, ensuring the continuity and reliability of the heat exchange system and reducing the stress changes of the equipment caused by flow fluctuations. At the same time, drainage improves the heat recovery efficiency of the heat network drain, simplifies the management process of the heat network drain, reduces the maintenance requirements of the equipment, and reduces operating costs.

[0039] S2. The hot network drain water after drainage is passed into the heat exchanger 300;

[0040] After the hot network drain water is stored in the water storage tank 201, the heat of the hot network drain water is utilized by passing the hot network drain water into the heat exchanger 300 for heat exchange, and the waste heat in the drain water is extracted to the maximum extent by utilizing the efficient heat exchange capacity of the heat exchanger 300.

[0041] After passing into the heat exchanger 300, the heat of the heat network drainage is effectively recovered, which reduces energy waste, improves the overall thermal efficiency of the system, and reduces heat loss.

[0042] The water storage tank 201 can perform additional storage when a large amount of hot network drain water is discharged from the heater 100, thereby preventing incomplete utilization of the hot network drain water due to excessive discharge.

[0043] Furthermore, the drained hot network water is directly introduced into the heat exchanger 300 through the direct current pipe 204. When the hot network water discharge in the heat exchanger is small, the hot network water is directly introduced into the heat exchanger 300 for heat exchange, thereby avoiding frequent starting of the water pump 203 in the water storage tank 201 and causing increased energy consumption.

[0044] When the water level in the drain tank is high, the drain pump 203 starts to pump water to the small heating plate exchanger. When the water level is low, the small heating plate exchanger of the heat exchanger 300 can only operate on one side. This causes the hot water in the small heating plate exchanger to be sometimes present and sometimes absent, causing the plate exchanger to be in a hot and cold alternating stress, causing a safety hazard to the heat exchanger 300. At the same time, the drain pump 203 is often running, which has a certain impact on the safety and vacuum of the unit. When the hot network drain discharge in the heat exchanger is small, the hot network drain is directly passed into the heat exchanger 300 for heat exchange, which can also avoid failure of the unit and the heat exchanger 300.

[0045] S3. Heat is exchanged between the medium in the heat exchanger 300 and the heat network drain;

[0046] The heat network drain exchanges heat with the medium in the heat exchanger 300, and the medium is used as a low-temperature heat source to further improve the heat energy recovery efficiency; the heat network drain exchanges heat with the medium in the heat exchanger 300, the heat in the heat network drain is absorbed by the medium, the temperature of the medium increases, and the temperature of the heat network drain decreases. The medium is a liquid that needs to be heated.

[0047] S4. By draining the heat network after heat exchange into the condenser;

[0048] Among them, the heat network drain after heat exchange is passed into the condenser, so that the drain is further cooled in the condenser and finally enters the condensate water system to complete the recovery and reuse of heat energy; the heat network drain after heat exchange is further cooled in the condenser to ensure that the drain temperature drops to an appropriate level and can safely enter the condensate water system.

[0049] During use, the hot network drain generated in the heat exchanger 300 is drained, and according to the amount of hot network drain generated, it is selected whether to collect the hot network drain and then discharge it into the heat exchanger 300, or to discharge it directly into the heat exchanger 300 for heat exchange. The hot network drain enters the condenser after heat exchange, and the condensed water heated by the heat exchanger 300 absorbs the heat of the hot network drain and can consume the temperature of the hot network drain.

[0050] Example 2, reference Figure 1 , which is the second embodiment of the present invention, a new heat network drain temperature utilization device, the device comprises: a heater 100, a collection component 200 and a heat exchange component 300;

[0051] When the heater 100 is working, it will discharge the hot network drain water, and the hot network drain water contains high temperature that can be reused;

[0052] The collecting component 200 includes a water tank 201 connected to the heater 100 , wherein the water tank 201 has multiple groups, and the water tank 201 can collect the hot network drain water discharged from the heater 100 .

[0053] Furthermore, there are multiple heaters 100, and each heater 100 is provided with a water outlet pipe 101 and a valve 102 arranged on the water outlet pipe 101; the ends of the multiple water outlet pipes 101 are connected to a merging pipe 103, which can drain and merge the heat network drainage generated in the multiple heaters 100.

[0054] There are multiple water tanks 201, and all of them are connected to the confluence pipe 103, and a valve three is provided between the two. The valve three can be used to control the number of water tanks 201 in use. When the hot network drainage generated by the water heater is large, multiple water tanks 201 can be opened at the same time to store the hot network drainage. The multiple water tanks 201 are connected by the confluence pipe 202; the hot network drainage drained from the confluence pipe 103 will enter the water tank 201 for storage, and then merge again from the confluence pipe 202.

[0055] Furthermore, the water tank 201 is also connected to an emergency expansion tank 206, which is connected to the drainage trough. It can collect excess hot network drainage that cannot be collected in the water tank 201 and pass it into the drainage trough to ensure the stable operation of the heater 100.

[0056] Among them, the heat exchange component 300 includes a heat exchanger 300 connected to the water tank 201, wherein the heat exchanger 300 is connected to the confluence pipe 202, and a plurality of sets of drain pumps 203 are arranged between the two. The drain pumps 203 can pump the heat network drain pump 203 in the water tank into the heat exchanger 300 for heat exchange, thereby reusing the heat in the heat network drain.

[0057] The liquid medium to be heated is passed through the heat exchanger 300 to exchange heat with the hot network hydrophobicity pumped into the heat exchanger 300. The hot network hydrophobicity heats the medium, thereby realizing the temperature utilization of the hot network hydrophobicity, avoiding the waste of its heat, and thus saving energy consumption.

[0058] Example 3, reference Figure 1 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that a direct current pipeline 204 is provided between the merging pipeline 103 and the merging pipeline 202, and a valve 205 is provided on the direct current pipeline 204, wherein the valve 205 is made of an electric door and a manual door.

[0059] Since the drain pump 203 will only start to pump water to the small heating plate exchanger when the water level in the drain tank is high, the small heating plate exchanger of the heat exchanger 300 can only operate on one side when the water level is low. This causes the hot water in the small heating plate exchanger to be sometimes present and sometimes absent, causing the plate exchanger to be in a hot and cold alternating stress, causing a safety hazard to the heat exchanger 300. At the same time, the drain pump 203 is often running, which has a certain impact on the safety and vacuum of the unit. When the hot network drain discharge in the heat exchanger is small, the hot network drain is directly passed into the heat exchanger 300 for heat exchange, which can avoid failure of the unit and the heat exchanger 300.

[0060] The remaining structure is the same as that of Example 2.

[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0062] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A new method for utilizing the drainage temperature of a heat network, characterized in that: include, By draining the heat network; By passing the drained hot network drain water into the heat exchanger (300); Exchanging heat with the medium in the heat exchanger (300) through the heat network drain; and, The water from the heat network after heat exchange is passed into the condenser.

2. The new method for utilizing the water drainage temperature of the heating network according to claim 1 is characterized in that: The drained hot network drain water is collected and stored through a plurality of water storage tanks (201).

3. The new method for utilizing the water drainage temperature of the heating network according to claim 2 is characterized in that: An emergency expansion tank (206) is provided to be connected to the water storage tank (201), and the emergency expansion tank (206) is communicated with the drainage trough.

4. The new method for utilizing the water drainage temperature of the heating network according to claim 2 or 3, characterized in that: The drained hot network water is directly introduced into the heat exchanger (300) through the direct current pipeline (204).

5. The new method for utilizing the drainage temperature of the heating network according to claim 4 is characterized in that: The direct current pipeline (204) is provided with an electric door and a manual door.

6. A new heating network drain water temperature utilization device, used to implement a new heating network drain water temperature utilization method according to any one of claims 1 to 5, characterized in that: include; Heater (100); A collection assembly (200) comprising a water storage tank (201) connected to the heater (100); as well as, A heat exchanger (300) is connected to the water storage tank (201).

7. The new heat network drain temperature utilization device according to claim 6 is characterized in that: The heater (100) is provided in plurality, and each heater (100) is provided with a water outlet pipe (101) and a valve (102) arranged on the water outlet pipe (101); The ends of the plurality of water outlet pipes (101) are connected to a merging pipe 1 (103).

8. The new heat network drain temperature utilization device according to claim 7 is characterized in that: There are multiple water storage tanks (201), and all of them are connected to the first merging pipe (103), and the multiple water storage tanks (201) are connected via the second merging pipe (202); The second confluence pipe (202) is connected to the heat exchanger (300), and a plurality of drain pumps (203) are arranged between the two.

9. The new heat network drain temperature utilization device according to claim 8 is characterized in that: A direct current pipeline (204) is provided between the first converging pipeline (103) and the second converging pipeline (202), and a second valve (205) is provided on the direct current pipeline (204).

10. The new heat network drain temperature utilization device according to any one of claims 6-9, characterized in that: The water storage tank (201) is also connected to an emergency expansion tank (206), and the emergency expansion tank (206) is in communication with a drainage trough.

Images