Steam condensate water recycling device

Abstract

The utility model relates to the technical field of energy recovery, in particular to a steam condensate water recycling device which comprises a flash tank, a water filter pipe and a heat exchanger arranged at the downstream of the water filter pipe, and a water inlet pipe is arranged on one side of the flash tank and communicated with a condensate water discharge outlet of steam equipment through a drain valve. A drain pipe is arranged at the bottom of the flash tank, the other end of the drain pipe is communicated with a water filter pipe through a drain valve, the other end of the water filter pipe is communicated with an inlet of a first fluid passage of the heat exchanger through a drain pump, and a condensate recovery pipe connected with condensate storage equipment is mounted at an outlet of the first fluid passage of the heat exchanger; a Y-shaped filter, a magnetic iron remover and a grease filter are sequentially mounted on the water filter pipe between the drainage valve and the drainage pump along the water flow direction; according to the utility model, the recovery quality of condensate water is effectively improved, and the scaling risk of the boiler is reduced; the comprehensive utilization rate of energy is improved, and remarkable economic benefits and environmental benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of energy recovery technology, and in particular to a steam condensate recovery and reuse device. Background Technology

[0002] Currently, the processing and preparation of food additives often generates a large amount of high-temperature steam condensate. Direct discharge of this condensate can lead to significant energy waste and water consumption, thus necessitating its recycling and reuse.

[0003] Traditional condensate recovery devices are typically single-stage filtration structures, which cannot effectively intercept contaminants such as grease and rust mixed in the condensate, thus affecting the recovery quality and causing boiler scaling risks. At the same time, the secondary steam generated by steam condensate is usually discharged directly through pipelines, which not only causes direct loss of heat energy and fails to fully utilize the heat contained in the secondary steam, but also causes thermal and noise pollution problems, which have an adverse impact on the surrounding environment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a steam condensate recovery and reuse device that has multi-stage filtration, can efficiently recover secondary steam heat and ensure the quality of condensate recovery, in order to address the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steam condensate recovery and reuse device includes a flash tank, with an inlet pipe on one side of the flash tank. The inlet pipe is connected to the condensate discharge port of the steam equipment via a steam trap. Its features are:

[0007] It also includes a water filter pipe and a heat exchanger located downstream of the water filter pipe;

[0008] The bottom of the flash tank is equipped with a drain pipe, the other end of which is connected to a filter pipe via a drain valve. The other end of the filter pipe is connected to the inlet of the first fluid passage of the heat exchanger via a drain pump. The outlet of the first fluid passage of the heat exchanger is equipped with a condensate recovery pipe connected to a condensate storage device. A Y-type filter, a magnetic iron remover, and a grease filter are installed sequentially along the water flow direction on the filter pipe between the drain valve and the drain pump.

[0009] The top of the flash tank is equipped with a steam exhaust pipe, and the other end of the steam exhaust pipe is connected to the pressurization device through an exhaust valve. The exhaust outlet of the pressurization device is equipped with a flash steam recovery pipe connected to an external steam system.

[0010] The technical problem to be solved by this utility model can be further achieved through the following steps: the magnetic iron remover includes a first housing in the shape of a vertical cylinder, and first joints for connecting with pipes are integrally formed on opposite sides of the first housing. An upper connecting plate and a lower connecting plate are horizontally arranged inside the first housing. A plurality of electromagnetic rods are vertically arranged between the upper connecting plate and the lower connecting plate. The upper and lower ends of each electromagnetic rod are fixed to the upper connecting plate and the lower connecting plate respectively by bolts. A first top cover is fixedly connected to the top of the upper connecting plate by bolts. The first top cover covers the top opening of the first housing and is detachably connected to the first housing by a locking mechanism.

[0011] The technical problem to be solved by this utility model can be further achieved through the following steps: the grease filter includes a second shell in the shape of a vertical cylinder, with second connectors for connecting to pipes respectively provided on opposite sides of the second shell, and a water guide pipe vertically provided in the middle of the second shell and integrally connected to one of the second connectors. An annular support plate fixedly welded to the inner wall of the second shell is provided on the outer periphery of the water guide pipe. The annular support plate divides the second shell into an upper filtration chamber and a lower water flow chamber. Multiple water passage holes connecting the upper filtration chamber and the lower water flow chamber are evenly opened along the circumference of the annular support plate. An oil removal filter cylinder is vertically provided in the upper filtration chamber on the outer periphery of the water guide pipe. A second top cover is fixedly connected to the top of the oil removal filter cylinder by bolts. The second top cover covers the top opening of the second shell and is detachably connected to the second shell by a locking mechanism.

[0012] The technical problem to be solved by this utility model can be further achieved through the following steps: the locking mechanism includes a connecting ear fixedly installed on the top of the outer periphery of the first housing, a locking screw rotatably installed on the connecting ear, a locking cap threadedly connected to the locking screw for easy rotation by hand, and an avoidance opening provided on the first top cover to cooperate with the locking screw.

[0013] The technical problem to be solved by this utility model can be further achieved through the following steps: the oil removal filter cartridge includes an inner support mesh and an outer support mesh, and a horizontal mounting plate is fixedly connected to the top of the inner support mesh and the outer support mesh. The mounting plate is fixedly connected to the second top cover by bolts. The water guide pipe is set on the inner circumference of the inner support mesh. A filter element is inserted between the inner support mesh and the outer support mesh. A sealing ring is set between the filter element and the annular support plate.

[0014] The technical problem to be solved by this utility model can be further achieved through the following steps: two magnetic iron removers and grease filters are connected in parallel, and a shut-off valve is provided between each magnetic iron remover and the Y-type filter, and between the grease filter and the drain pump.

[0015] The technical problem to be solved by this utility model can be further achieved through the following steps: the pressurizing device is a steam compressor, and a pressure gauge is installed on the exhaust pipe between the steam compressor and the exhaust valve. The pressure gauge is electrically connected to the steam compressor.

[0016] The technical problem to be solved by this utility model can be further achieved through the following steps: the inlet of the second fluid passage of the heat exchanger is equipped with a drinking water preheating pipe connected to an external drinking water source, and the outlet of the second fluid passage of the heat exchanger is equipped with a drinking water discharge pipe connected to a drinking water storage device.

[0017] The technical problem to be solved by this utility model can be further achieved through the following steps: a spare branch pipe is connected in parallel on one side of the water inlet pipe, and a drain valve is installed on both the spare branch pipe and the water inlet pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] By installing a Y-type filter, a magnetic iron remover, and a grease filter on the water filter pipe, a multi-stage filtration structure is formed, which effectively intercepts pollutants such as grease and rust mixed in the condensate, improves the quality of condensate recovery, reduces the risk of boiler scaling, and ensures the safe and stable operation of subsequent equipment.

[0020] By installing a steam exhaust pipe at the top of the flash tank, secondary steam is introduced into the pressurization device. The pressurized secondary steam is then transported to the external steam system through the flash steam recovery pipe, achieving efficient recovery and utilization of secondary steam heat, avoiding direct loss of heat energy, and improving the overall energy utilization rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a magnetic iron separator;

[0023] Figure 3 This is a schematic diagram of a grease filter (arrows indicate water flow direction).

[0024] Figure 4 for Figure 3 Sectional view along direction A;

[0025] In the diagram: 1-Flash tank; 2-Inlet pipe; 3-Steam trap; 4-Filter pipe; 5-Heat exchanger; 6-Drain pipe; 7-Drain valve; 8-Drain pump; 9-Condensate recovery pipe; 10-Y-type filter; 11-Magnetic iron separator; 12-Grease filter; 13-Exhaust pipe; 14-Exhaust valve; 15-Flash steam recovery pipe; 16-First shell; 17-First connector; 18-Upper connecting plate; 19-Lower connecting plate; 20-Electromagnetic rod; 21-First top cover; 22-Second shell; 23-Second connector; 24-Water guide pipe ; 25-Annular support plate; 26-Upper filter chamber; 27-Lower water flow chamber; 28-Water passage hole; 29-Second top cover; 30-Connecting ear; 31-Locking screw; 32-Locking cap; 33-Inner support net; 34-Outer support net; 35-Mounting plate; 36-Filter element; 37-Sealing ring; 38-Stop valve; 39-Steam compressor; 40-Pressure gauge; 41-Drinking water preheating pipe; 42-Drinking water discharge pipe; 43-Spare branch pipe; 44-Steam equipment; 45-Condensate buffer tank; 46-Drinking water buffer tank. Detailed Implementation

[0026] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0028] Please refer to Figure 1-4 A steam condensate recovery and reuse device includes a flash tank 1. A water inlet pipe 2 is installed on one side of the flash tank 1. The water inlet pipe 2 is connected to the condensate discharge port of a steam equipment 44 via a steam trap 3 to receive the high-temperature condensate discharged from the steam equipment 44. The steam trap 3 automatically discharges the condensate while preventing steam leakage, ensuring the stable operation of the steam equipment 44.

[0029] This utility model also includes a water filter pipe 4 and a heat exchanger 5 disposed downstream of the water filter pipe 4. As is known to those skilled in the art, the heat exchanger 5 has a first fluid passage and a second fluid passage, with an inlet and an outlet respectively for the first and second fluid passages. A drain pipe 6 is provided at the bottom of the flash tank 1. The other end of the drain pipe 6 is connected to the water filter pipe 4 through a drain valve 7. The water filter pipe 4 serves as a channel for condensate filtration. Its other end is connected to the inlet of the first fluid passage of the heat exchanger 5 through a drain pump 8. A condensate recovery pipe 9 connected to a condensate storage device is installed at the outlet of the first fluid passage of the heat exchanger 5. A Y-type filter 10, a magnetic iron remover 11, and a grease filter 12 are sequentially installed on the water filter pipe 4 between the drain valve 7 and the drain pump 8 along the water flow direction, forming a multi-stage filtration structure to gradually remove impurities from the condensate.

[0030] The top of the flash tank 1 is provided with a steam exhaust pipe 13. The other end of the steam exhaust pipe 13 is connected to the pressurizing device through a vent valve 14. The steam exhaust outlet of the pressurizing device is equipped with a flash steam recovery pipe 15 connected to an external steam system, so as to pressurize and recover the secondary steam generated in the flash tank 1.

[0031] Please refer to Figure 2 In the above structure, the magnetic iron separator 11 includes a first housing 16 in the shape of a vertical cylinder. First connectors 17, which connect to pipes, are integrally formed on opposite sides of the first housing 16 for easy connection to the water filter pipe 4. An upper connecting plate 18 and a lower connecting plate 19 are horizontally arranged inside the first housing 16. Multiple electromagnetic rods 20 are vertically arranged between the upper and lower connecting plates 18 and 19. The upper and lower ends of each electromagnetic rod 20 are fixed to the upper and lower connecting plates 18 and 19 respectively by bolts. When condensate water passes through the magnetic iron separator 11, the electromagnetic rods 20 are energized to generate a magnetic field, which can effectively adsorb ferromagnetic impurities such as rust in the condensate water. A first top cover 21 is fixedly connected to the top of the upper connecting plate 18 by bolts. The first top cover 21 covers the top opening of the first housing 16 and is detachably connected to the first housing 16 by a locking mechanism.

[0032] The locking mechanism includes a connecting lug 30 fixedly installed on the top of the outer periphery of the first housing 16. A locking screw 31 is rotatably mounted on the connecting lug 30. A locking cap 32, which is easily rotated by hand, is threaded onto the locking screw 31. The first top cover 21 is provided with a clearance opening that mates with the locking screw 31. When it is necessary to clean or replace the electromagnetic rod 20, simply loosen the locking cap 32, turn the locking screw 31 out of the clearance opening, and then lift the first top cover 21 by the handle to remove the electromagnetic rod 20. The operation is convenient and quick.

[0033] Please refer to Figure 3 , 4The grease filter 12 includes a second housing 22 in the shape of a vertical cylinder. Second connectors 23, which connect to pipes, are respectively provided on opposite sides of the second housing 22 for connection to a water filter pipe 4. A water guide pipe 24, integrally connected to one of the second connectors 23, is vertically arranged in the middle of the second housing 22. An annular support plate 25, fixedly welded to the inner wall of the second housing 22, is provided on the outer periphery of the water guide pipe 24. The annular support plate 25 divides the second housing 22 into an upper filtration chamber 26 and a lower water flow chamber 27. Multiple water passage holes 28, evenly distributed along the circumference of the annular support plate 25, connect the upper filtration chamber 26 and the lower water flow chamber 27. An oil removal filter cartridge is vertically arranged in the upper filtration chamber 26 on the outer periphery of the water guide pipe 24. A second top cover 29 is bolted to the top of the oil removal filter cartridge. The second top cover 29 covers the top opening of the second housing 22 and is detachably connected to the second housing 22 by a locking mechanism.

[0034] The oil removal filter cartridge includes an inner support mesh 33 and an outer support mesh 34. The tops of the inner support mesh 33 and the outer support mesh 34 are fixedly connected to a horizontal mounting plate 35. The mounting plate 35 is fixedly connected to the second top cover 29 by bolts. The water guide pipe 24 is set on the inner circumference of the inner support mesh 33. A filter element 36 is inserted between the inner support mesh 33 and the outer support mesh 34. A sealing ring 37 is provided between the filter element 36 and the annular support plate 25.

[0035] When condensate enters the grease filter 12, it flows through the water pipe 24 into the upper filter chamber 26. After being filtered by the filter element 36, grease and other impurities are trapped on the filter element 36. The filtered condensate then flows through the water passage 28 into the lower water chamber 27 and out through the pipe. When the filter element 36 needs to be replaced, loosen the locking mechanism between the second top cover 29 and the second housing 22, remove the second top cover 29, and the filter element 36 can be pulled out from between the inner support net 33 and the outer support net 34 for replacement.

[0036] To improve system stability, two magnetic separators 11 and grease filters 12 are connected in parallel. Each magnetic separator 11 is equipped with a shut-off valve 38 between it and the Y-type filter 10, and each grease filter 12 is connected between it and the drain pump 8. Thus, when one magnetic separator 11 or grease filter 12 needs maintenance or filter element 36 replacement, the corresponding shut-off valve 38 can be closed, and the shut-off valve 38 of the other parallel magnetic separator 11 or grease filter 12 can be opened, allowing the device to continue normal operation without affecting the steam condensate recovery process.

[0037] In the above structure, the pressurizing device is a steam compressor 39. A pressure gauge 40 is installed on the exhaust pipe 13 between the steam compressor 39 and the exhaust valve 14, and the pressure gauge 40 is electrically connected to the steam compressor 39. The pressure gauge 40 monitors the pressure of the secondary steam in the exhaust pipe 13 and transmits the pressure signal to the steam compressor 39. The steam compressor 39 adjusts its operating parameters according to the received pressure signal to ensure that the secondary steam can be stably pressurized and transported to the external steam system through the flash steam recovery pipe 15, realizing the efficient recovery and utilization of the heat of the secondary steam. The steam compressor 39 is specifically an HDSR-400WN Roots steam compressor manufactured by Huadong Fan Product Center, the structure of which is well known to those skilled in the art and will not be described in detail here.

[0038] Furthermore, the inlet of the second fluid passage of the heat exchanger 5 is equipped with a drinking water preheating pipe 41 connected to an external drinking water source, and the outlet of the second fluid passage of the heat exchanger 5 is equipped with a drinking water discharge pipe 42 connected to a drinking water storage device. When external drinking water enters the second fluid passage of the heat exchanger 5 through the drinking water preheating pipe 41, it exchanges heat with the condensate in the first fluid passage, thereby preheating the drinking water and improving energy utilization efficiency. The preheated drinking water is then transported to the drinking water storage device through the drinking water discharge pipe 42 for subsequent use.

[0039] Furthermore, a backup branch pipe 43 is connected in parallel to one side of the inlet pipe 2, and both the backup branch pipe 43 and the inlet pipe 2 are equipped with steam traps 3. When the main inlet pipe 2 malfunctions or needs maintenance, the steam trap 3 on the main inlet pipe 2 can be closed, and the steam trap 3 on the backup branch pipe 43 can be opened, allowing the steam condensate to enter the flash tank 1 through the backup branch pipe 43, ensuring the continuous and stable operation of the unit.

[0040] In use, the high-temperature steam condensate generated by the steam equipment 44 enters the flash tank 1 through the drain valve 3 and the inlet pipe 2. Under pressure, the condensate in the flash tank 1 partially vaporizes into secondary steam. The secondary steam enters the steam compressor 39 for pressurization through the exhaust pipe 13 and the exhaust valve 14. The pressurized secondary steam is then transported to the external steam system through the flash steam recovery pipe 15, realizing the recovery and utilization of the heat of the secondary steam.

[0041] The remaining condensate in flash tank 1 enters filter pipe 4 through drain pipe 6 and drain valve 7, and then undergoes multi-stage filtration through Y-type filter 10, magnetic iron remover 11, and grease filter 12 to remove impurities such as grease and rust, resulting in high-quality condensate. The filtered condensate, driven by drain pump 8, enters the first fluid passage of heat exchanger 5, where it exchanges heat with drinking water in the second fluid passage to preheat the drinking water. The preheated drinking water is then transported to drinking water storage equipment through drinking water discharge pipe 42, while the condensate is transported to condensate storage equipment through condensate recovery pipe 9 for subsequent recycling.

[0042] In summary, the steam condensate recovery and reuse device of this utility model effectively improves the quality of condensate recovery through a multi-stage filtration structure, reducing the risk of boiler scaling; and improves the comprehensive utilization rate of energy by efficiently recovering secondary steam heat, thus having significant economic and environmental benefits.

[0043] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A steam condensate recovery and reuse device, comprising a flash tank, wherein a water inlet pipe is provided on one side of the flash tank, and the water inlet pipe is connected to the condensate discharge port of the steam equipment through a steam trap, characterized in that: It also includes a water filter pipe and a heat exchanger located downstream of the water filter pipe; The bottom of the flash tank is equipped with a drain pipe, the other end of which is connected to a filter pipe via a drain valve. The other end of the filter pipe is connected to the inlet of the first fluid passage of the heat exchanger via a drain pump. The outlet of the first fluid passage of the heat exchanger is equipped with a condensate recovery pipe connected to a condensate storage device. A Y-type filter, a magnetic iron remover, and a grease filter are installed sequentially along the water flow direction on the filter pipe between the drain valve and the drain pump. The top of the flash tank is equipped with a steam exhaust pipe, and the other end of the steam exhaust pipe is connected to the pressurization device through an exhaust valve. The exhaust outlet of the pressurization device is equipped with a flash steam recovery pipe connected to an external steam system.

2. The steam condensate recovery and reuse device according to claim 1, characterized in that: The magnetic iron remover includes a first housing in the shape of a vertical cylinder. The opposite sides of the first housing are integrally formed with first connectors that connect to the pipe. An upper connecting plate and a lower connecting plate are horizontally arranged inside the first housing. A plurality of electromagnetic rods are vertically arranged between the upper and lower connecting plates. The upper and lower ends of each electromagnetic rod are fixed to the upper and lower connecting plates respectively by bolts. The top of the upper connecting plate is fixedly connected to a first top cover by bolts. The first top cover covers the top opening of the first housing and is detachably connected to the first housing by a locking mechanism.

3. The steam condensate recovery and reuse device according to claim 1, characterized in that: The grease filter includes a second housing in the shape of a vertical cylinder. Second connectors for connecting to pipes are respectively provided on opposite sides of the second housing. A water guide pipe, integrally connected to one of the second connectors, is vertically arranged in the middle of the second housing. An annular support plate, fixedly welded to the inner wall of the second housing, is provided on the outer periphery of the water guide pipe. The annular support plate divides the second housing into an upper filtration chamber and a lower water flow chamber. Multiple water passage holes connecting the upper filtration chamber and the lower water flow chamber are evenly opened along the circumference of the annular support plate. An oil removal filter cartridge is vertically arranged in the upper filtration chamber on the outer periphery of the water guide pipe. A second top cover is fixedly connected to the top of the oil removal filter cartridge by bolts. The second top cover closes the top opening of the second housing and is detachably connected to the second housing by a locking mechanism.

4. The steam condensate recovery and reuse device according to claim 2, characterized in that: The locking mechanism includes a connecting lug fixedly installed on the top of the outer periphery of the first housing, a locking screw rotatably installed on the connecting lug, a locking cap threaded onto the locking screw for easy rotation by hand, and an clearance opening provided on the first top cover to cooperate with the locking screw.

5. The steam condensate recovery and reuse device according to claim 3, characterized in that: The oil removal filter cartridge includes an inner support mesh and an outer support mesh. A horizontal mounting plate is fixedly connected to the top of the inner and outer support meshes. The mounting plate is fixedly connected to the second top cover by bolts. The water guide pipe is set on the inner circumference of the inner support mesh. A filter element is inserted between the inner and outer support meshes. A sealing ring is provided between the filter element and the annular support plate.

6. The steam condensate recovery and reuse device according to claim 1, characterized in that: Two magnetic iron removers and grease filters are connected in parallel. Each magnetic iron remover is equipped with a shut-off valve between itself and the Y-type filter, and between the grease filter and the drain pump.

7. The steam condensate recovery and reuse device according to claim 1, characterized in that: The pressurizing device is a steam compressor, and a pressure gauge is installed on the exhaust pipe between the steam compressor and the exhaust valve. The pressure gauge is electrically connected to the steam compressor.

8. The steam condensate recovery and reuse device according to claim 1, characterized in that: The inlet of the second fluid passage of the heat exchanger is equipped with a drinking water preheating pipe connected to an external drinking water source, and the outlet of the second fluid passage of the heat exchanger is equipped with a drinking water discharge pipe connected to a drinking water storage device.

9. The steam condensate recovery and reuse device according to claim 1, characterized in that: A spare branch pipe is connected in parallel on one side of the inlet pipe, and a drain valve is installed on both the spare branch pipe and the inlet pipe.

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