Heat energy storage and recovery system

Abstract

The utility model discloses a heat energy storage and recovery system, and belongs to the technical field of heat energy recovery. A heat energy storage and recovery system comprises an energy storage tank, a low-temperature hot water tank, a flash tank and a plate heat exchanger, a hot water outlet of the energy storage tank is connected to an inlet of the low-temperature hot water tank, an outlet of the low-temperature hot water tank is connected with a boiler and a production workshop, and a condensate water outlet of the production workshop is connected with the flash tank through a drain valve. A flash steam outlet of the flash tank is connected with a hot side inlet of the plate heat exchanger, the cold side of the plate heat exchanger is connected with an external water source used for providing low-temperature process water, and a filtering assembly used for filtering the low-temperature process water is installed at one end of a low-temperature process water inlet of the plate heat exchanger; the filter assembly is installed at the low-temperature process water inlet, and low-temperature process water is filtered through the filter screen, so that the accumulation time of impurities in the plate heat exchanger is shortened, and the cleaning frequency of the plate heat exchanger is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery technology, and in particular to a heat energy storage and recovery system. Background Technology

[0002] Yeast powder is yeast that has not been decomposed, but the nutrients in yeast extract have been decomposed, resulting in higher absorption and utilization speed and efficiency by microorganisms and less fermentation residue. Bio-fermentation research mainly focuses on yeast extract and yeast extract paste, while yeast powder is widely used in traditional fermentation industries such as antibiotics.

[0003] In the yeast production process, a large amount of heat energy is required. In the heat energy system, a heat energy storage and recovery system is used to reduce heat energy loss and improve heat energy utilization. In the existing technology, the heat energy storage and recovery system includes energy-saving heat exchanger heat exchanger, plate heat exchanger heat exchanger, condensate recovery, steam heating of hot water to realize energy storage, and hot water transfer to boiler feedwater and production workshop use.

[0004] Plate heat exchangers are made of stacked metal plates. Thin rectangular channels are formed between the various metal plates, and heat is exchanged through the metal plates. However, after a certain period of use, a large amount of impurities and scale are easily formed between the metal plates, which can easily cause blockage. It is necessary to frequently disassemble and clean them. However, disassembly and cleaning are time-consuming, labor-intensive, and inefficient, which affects the use of plate heat exchangers. Utility Model Content

[0005] The purpose of this invention is to solve the problem of easy clogging in plate heat exchangers in the prior art, and to propose a heat energy storage and recovery system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A thermal energy storage and recovery system includes an energy storage tank, a low-temperature hot water tank, a flash tank, and a plate heat exchanger. The hot water outlet of the energy storage tank is connected to the inlet of the low-temperature hot water tank. The outlet of the low-temperature hot water tank is connected to a boiler and a production workshop, respectively. The condensate outlet of the production workshop is connected to the flash tank via a steam trap. The flash steam outlet of the flash tank is connected to the hot side inlet of the plate heat exchanger. The cold side of the plate heat exchanger is connected to an external water source for providing low-temperature process water. A filter assembly for filtering the low-temperature process water is installed at one end of the low-temperature process water inlet of the plate heat exchanger.

[0008] In some embodiments, the filtration assembly includes a housing installed at one end of the plate heat exchanger inlet and two sets of filter screens disposed inside the housing. A cavity for replacing the two sets of filter screens is provided below the housing. The two sets of filter screens are arranged in parallel and do not interfere with each other.

[0009] In some embodiments, the two sets of filter screens slide inside the housing via an annular groove and a slide rail, respectively. The annular groove is formed on the surface of the fastening ring of the filter screen, and the slide rail is fixed inside the housing.

[0010] In some embodiments, the two sets of filter screens are driven to rise and fall by two lifting components. Each lifting component includes a threaded rod that rotates inside the housing and a movable block that is threadedly connected to the surface of the threaded rod. The movable block is fixed to one side of the filter screen, and the two sets of lifting components are symmetrically arranged inside the housing.

[0011] In some embodiments, a backwashing assembly is provided on the side of the housing corresponding to the cavity. The backwashing assembly includes a first telescopic cover fixed to the side of the housing near the plate heat exchanger and a water pump fixed to the surface of the plate heat exchanger.

[0012] In some embodiments, two pneumatic push rods are fixed inside the first telescopic cover, and the pneumatic push rods are used to drive the first telescopic cover to abut against the filter screen surface near the connecting cover.

[0013] In some embodiments, a connecting cover is fixed to the side of the housing away from the plate heat exchanger at a position corresponding to the cavity, and a drain pipe is connected to the surface of the connecting cover.

[0014] In some embodiments, a second telescopic cover is fixed to the side of the filter screen away from the connecting cover and the side of the filter screen near the connecting cover, and the second telescopic cover forms a rinsing channel with the connecting cover through a traction assembly.

[0015] In some embodiments, the traction assembly includes a connecting rod fixed inside a second telescopic cover and a plate fixed to the surface of the connecting rod. The traction assembly also includes an electric push rod fixed to the surface of the connecting cover and a sleeve fixed to the output end of the electric push rod, the sleeve cooperating with the plate.

[0016] Compared with the prior art, the present invention provides a thermal energy storage and recovery system, which has the following beneficial effects.

[0017] 1. This utility model reduces the time for impurities to accumulate inside the plate heat exchanger and reduces the frequency of cleaning the plate heat exchanger by installing a filter assembly at the low-temperature process water inlet and filtering the low-temperature process water through the filter screen.

[0018] 2. This utility model, by setting two sets of filter screens, when one set of filter screens is saturated, replaces the filter screen and backwashes the saturated filter screen, thereby maintaining the filtration effect of the filter component and improving the service life of the filter component.

[0019] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0020] Figure 1 This is a system block diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the axial structure of this utility model.

[0022] Figure 3 This is a frontal cross-sectional view of the shell structure in this utility model.

[0023] Figure 4 This is a side view cross-sectional structural diagram of the shell in this utility model.

[0024] Figure 5 This is a cross-sectional structural diagram of the first telescopic cover in this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the second telescopic cover in this utility model.

[0026] Figure 7 This is a schematic diagram of the traction component in use according to the present invention.

[0027] Figure 8 This utility model Figure 6 Enlarged structural diagram at point A in the middle.

[0028] In the picture:

[0029] 1. Plate heat exchanger; 2. Shell; 201. Cavity; 3. Filter screen; 301. Annular groove; 302. Slide rail; 4. Lifting assembly; 401. Threaded rod; 402. Moving block; 403. Drive motor; 5. Backwashing assembly; 501. First telescopic cover; 502. Water pump; 503. Pneumatic push rod; 6. Connecting cover; 7. Drain pipe; 8. Second telescopic cover; 9. Traction assembly; 901. Connecting rod; 902. Insert plate; 903. Insert sleeve; 904. Electric push rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Reference Figure 1-7A thermal energy storage and recovery system includes an energy storage tank, a low-temperature hot water tank, a flash tank, and a plate heat exchanger 1. The hot water outlet of the energy storage tank is connected to the inlet of the low-temperature hot water tank. The outlet of the low-temperature hot water tank is connected to a boiler and a production workshop. The condensate outlet of the production workshop is connected to a steam trap, and the outlet of the steam trap is connected to the flash tank. The flash steam outlet of the flash tank is connected to the hot-side inlet of the plate heat exchanger 1. The hot-side outlet of the plate heat exchanger 1 is connected to the flash tank. The flue gas outlet of the boiler is connected to an economizer. The cold water inlet of the economizer is connected to an external water source, and its outlet is connected to the cold water inlet of the energy storage tank. The steam inlet of the energy storage tank is connected to the steam outlet of the boiler. The steam inlet of the production workshop is connected to the steam outlet of the boiler. The cold side of the plate heat exchanger 1 is connected to an external water source. Low-temperature process water is supplied, and the heated process water from the outlet of plate heat exchanger 1 flows into the production workshop; the energy saver is an energy saver used for cooling boiler flue gas; the condensate from the production workshop is collected in the flash tank through a drain valve; the warm water in the storage tank is heated by boiler steam to further increase the hot water temperature and meet the requirements of the production workshop; a filter assembly for filtering the low-temperature process water is installed at one end of the low-temperature process water inlet of plate heat exchanger 1. The filter assembly includes a shell 2 installed at one end of the inlet of plate heat exchanger 1 and two sets of filter screens 3 set inside the shell 2. A cavity 201 for replacing the two sets of filter screens 3 is set below the shell 2. The two sets of filter screens 3 slide inside the shell 2 through an annular groove 301 and a slide rail 302, respectively.

[0032] Both sets of filter screens 3 use ultrafiltration membranes and biochemical cotton. A fastening ring is installed on the surface of the filter screen 3. An annular groove 301 is opened on the surface of the fastening ring of the filter screen 3. The slide rail 302 is fixed inside the housing 2. The filter screen 3 slides on the surface of the slide rail 302 through the annular groove 301. The two sets of filter screens 3 are arranged in parallel and do not interfere with each other. The two sets of filter screens 3 are driven to rise and fall by two lifting components 4 respectively. A gap is provided between the two sets of filter screens 3 for installing the lifting components 4. The lifting components 4 include a threaded rod 401 that rotates inside the housing 2 and a moving block 402 that is threadedly connected to the surface of the threaded rod 401. The moving block 402 is fixed on one side of the filter screen 3. A drive motor 403 for driving the threaded rod 401 to rotate is fixed on the upper surface of the housing 2. The two sets of lifting components 4 are symmetrically arranged inside the housing 2.

[0033] Understandably, since the plate heat exchanger 1 exchanges heat between low-temperature process water and flash steam, a filter assembly can be installed at the low-temperature process water inlet to filter the low-temperature process water through the filter screen 3, thereby reducing the time for impurities to accumulate inside the plate heat exchanger 1 and reducing the frequency of cleaning the plate heat exchanger 1. By setting two sets of filter screens 3, when one set of filter screens 3 becomes saturated, the filter screen 3 is replaced and the saturated filter screen 3 is backwashed, thereby maintaining the filtration effect of the filter assembly and improving the service life of the filter assembly. The drive motor 403 drives the threaded rod 401 to rotate, thereby causing the upper filter screen 3 to move into the cavity 201, while the filter screen 3 in the cavity 201 moves upward to align with the pipe of the shell 2 for filtration, while the filter screen 3 entering the cavity 201 awaits backwashing.

[0034] Specifically, a backwashing assembly 5 is provided on the side of the housing 2 corresponding to the cavity 201. The backwashing assembly 5 includes a first telescopic cover 501 fixed on the side of the housing 2 near the plate heat exchanger 1 and a water pump 502 fixed on the surface of the plate heat exchanger 1. The inlet of the water pump 502 is connected to the end of the housing 2 near the plate heat exchanger 1 through a hose, and the outlet of the water pump 502 is connected to the first telescopic cover 501 through a hose. There are two pneumatic push rods 503 fixed inside the first telescopic cover 501 for driving the first telescopic cover 501 to extend and retract.

[0035] A connecting cover 6 is fixed on the side of the shell 2 away from the plate heat exchanger 1, corresponding to the cavity 201. A drain pipe 7 is connected to the surface of the connecting cover 6, and a solenoid valve is installed on the surface of the drain pipe 7.

[0036] Understandably, when the filter screen 3 near the connecting cover 6 is replaced inside the cavity 201, since the cavity 201 is connected to the inside of the housing 2, water flow can easily enter the top of the housing 2 during backwashing of the filter screen 3, resulting in insufficient backwashing pressure on the filter screen 3. Therefore, a first telescopic cover 501 is provided. When backwashing is required with the filter screen 3 near the connecting cover 6, the first telescopic cover 501 is extended by the pneumatic push rod 503, so that the first telescopic cover 501 abuts against the fastening ring surface of the filter screen 3, forming a flushing channel with the first telescopic cover 501, the filter screen 3 and the connecting cover 6. The filtered low-temperature process water is drawn into the first telescopic cover 501 by the water pump 502. Under the action of water pressure, the impurities on the surface of the filter screen 3 are flushed into the connecting cover 6 and discharged through the drain pipe 7, thus achieving the purpose of backwashing.

[0037] Specifically, a second telescopic cover 8 is fixed on the opposite side of the filter screen 3 away from the connecting cover 6 and the filter screen 3 close to the connecting cover 6. The second telescopic cover 8 forms a rinsing channel with the connecting cover 6 through the traction assembly 9. The traction assembly 9 includes a connecting rod 901 fixed inside the second telescopic cover 8 and an insert plate 902 fixed on the surface of the connecting rod 901. The surface of the connecting rod 901 is provided with a groove that is recessed into the second telescopic cover 8. The insert plate 902 is fixed on the top of the groove, and there is a gap between the lower end of the insert plate 902 and the bottom of the groove. The traction assembly 9 also includes an electric push rod 904 fixed on the surface of the connecting cover 6 and a sleeve 903 fixed on the output end of the electric push rod 904. The sleeve 903 cooperates with the insert plate 902.

[0038] Understandably, when the filter screen 3, which is away from the connecting cover 6, is replaced into the cavity 201, during the descent process, when the gap between the groove and the insert plate 902 corresponds to the insert sleeve 903, the electric push rod 904 drives the insert sleeve 903 to move into the groove. Then, the filter screen 3 descends to correspond with the first telescopic cover 501. At this time, the connecting rod 901 drives the insert plate 902 to insert into the insert sleeve 903. The electric push rod 904 retracts, thereby causing the insert sleeve 903 and the insert plate 902 to pull the second telescopic cover 8 to unfold and align with the connecting cover 6, thus allowing the first telescopic cover 501 and the filter screen 201 to align. The filter screen 3, the second telescopic cover 8, and the connecting cover 6 form a rinsing channel. The filtered low-temperature process water is pumped into the first telescopic cover 501 by the water pump 502. Under the action of water pressure, the impurities on the surface of the filter screen 3 are rinsed into the second telescopic cover 8 and the connecting cover 6 and discharged through the drain pipe 7 to achieve the purpose of backwashing and prevent sewage from entering the housing 2. After rinsing, the electric push rod 904 drives the second telescopic cover 8 to retract and separates the insert plate 902 and the insert sleeve 903. By setting the insert plate 902 inside the groove, it avoids movement interference with the other filter screen 3.

[0039] In this invention, a filter assembly is installed at the low-temperature process water inlet of the plate heat exchanger 1, and the low-temperature process water is filtered through the filter screen 3, thereby reducing the time for impurities to accumulate inside the plate heat exchanger 1 and reducing the frequency of cleaning the plate heat exchanger 1. When one set of filter screens 3 is saturated, the drive motor 403 drives the threaded rod 401 to rotate, causing the upper filter screen 3 to move into the cavity 201, while the filter screen 3 inside the cavity 201 moves upward to align with the pipe of the shell 2 for filtration. The filter screen 3 entering the cavity 201 waits for a return. Rinsing involves replacing filter screen 3 and backwashing saturated filter screen 3 to maintain the filtration effect of the filter assembly and extend its service life. When rinsing of filter screen 3 near the connecting cover 6 is required, the pneumatic push rod 503 extends the first telescopic cover 501, causing it to abut against the fastening ring surface of filter screen 3. This creates a rinsing channel between the first telescopic cover 501, filter screen 3, and connecting cover 6. The water pump 502 draws filtered low-temperature process water into the first telescopic cover 501, where the filtered water is rinsed under water pressure. Impurities on the surface of filter screen 3 are washed into the connecting cover 6 and discharged through the drain pipe 7, achieving the purpose of backwashing. When it is necessary to wash the filter screen 3 away from the connecting cover 6, during the descent, when the gap between the groove and the insert plate 902 corresponds to the insert sleeve 903, the electric push rod 904 drives the insert sleeve 903 to move into the groove. Then the filter screen 3 descends to correspond with the first telescopic cover 501. At this time, the connecting rod 901 drives the insert plate 902 to insert into the insert sleeve 903. The electric push rod 904 pulls the second telescopic cover 8 to unfold, aligning it with the connecting cover 6. This allows the first telescopic cover 501, filter screen 3, second telescopic cover 8, and connecting cover 6 to form a rinsing channel. The filtered low-temperature process water is pumped into the first telescopic cover 501 by the water pump 502. Under the action of water pressure, impurities on the surface of the filter screen 3 are rinsed into the second telescopic cover 8 and connecting cover 6 and discharged through the drain pipe 7, achieving the purpose of backwashing and preventing sewage from entering the housing 2. After rinsing, the electric push rod 904 drives the second telescopic cover 8 to retract and separates the insert plate 902 and the insert sleeve 903, making it convenient to replace the filter screen 3 again.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples; although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A thermal energy storage and recovery system, characterized in that, The system includes an energy storage tank, a low-temperature hot water tank, a flash tank, and a plate heat exchanger (1). The hot water outlet of the energy storage tank is connected to the inlet of the low-temperature hot water tank. The outlet of the low-temperature hot water tank is connected to the boiler and the production workshop, respectively. The condensate outlet of the production workshop is connected to the flash tank through a steam trap. The flash steam outlet of the flash tank is connected to the hot side inlet of the plate heat exchanger. The cold side of the plate heat exchanger (1) is connected to an external water source for providing low-temperature process water. A filter assembly for filtering the low-temperature process water is installed at one end of the low-temperature process water inlet of the plate heat exchanger (1).

2. The thermal energy storage and recovery system according to claim 1, characterized in that, The filtration assembly includes a housing (2) installed at one end of the inlet of the plate heat exchanger (1) and two sets of filter screens (3) disposed inside the housing (2). A cavity (201) for replacing the two sets of filter screens (3) is provided below the housing (2). The two sets of filter screens (3) are arranged in parallel and do not interfere with each other.

3. The thermal energy storage and recovery system according to claim 2, characterized in that, The two sets of filter screens (3) slide inside the housing (2) through an annular groove (301) and a slide rail (302), respectively. The annular groove (301) is opened on the fastening ring surface of the filter screen (3), and the slide rail (302) is fixed inside the housing (2).

4. A thermal energy storage and recovery system according to claim 2, characterized in that, The two sets of filter screens (3) are driven to rise and fall by two lifting components (4). The lifting components (4) include a threaded rod (401) rotating inside the housing (2) and a moving block (402) threadedly connected to the surface of the threaded rod (401). The moving block (402) is fixed on one side of the filter screen (3). The two sets of lifting components (4) are symmetrically arranged inside the housing (2).

5. A thermal energy storage and recovery system according to claim 2, characterized in that, A backwashing assembly (5) is provided on the side of the housing (2) corresponding to the cavity (201). The backwashing assembly (5) includes a first telescopic cover (501) fixed on the side of the housing (2) near the plate heat exchanger (1) and a water pump (502) fixed on the surface of the plate heat exchanger (1).

6. A thermal energy storage and recovery system according to claim 5, characterized in that, The first telescopic cover (501) has two pneumatic push rods (503) fixed inside. The pneumatic push rods (503) are used to drive the first telescopic cover (501) to abut against the surface of the filter screen (3) near the connecting cover (6).

7. A thermal energy storage and recovery system according to claim 2, characterized in that, A connecting cover (6) is fixed on the side of the shell (2) away from the plate heat exchanger (1) and at the corresponding position of the cavity (201). A drain pipe (7) is connected to the surface of the connecting cover (6).

8. A thermal energy storage and recovery system according to claim 2, characterized in that, A second telescopic cover (8) is fixed on the side opposite to the filter screen (3) near the connecting cover (6), and the second telescopic cover (8) forms a rinsing channel with the connecting cover (6) through the traction assembly (9).

9. A thermal energy storage and recovery system according to claim 8, characterized in that, The traction assembly (9) includes a connecting rod (901) fixed inside the second telescopic cover (8) and a plug plate (902) fixed on the surface of the connecting rod (901). The traction assembly (9) also includes an electric push rod (904) fixed on the surface of the connecting cover (6) and a plug sleeve (903) fixed on the output end of the electric push rod (904). The plug sleeve (903) cooperates with the plug plate (902).

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