Steam generator and heat pump unit

Abstract

The invention provides a steam generator and a heat pump unit. The steam generator includes: a housing; a deoxidizing structure; and a first heat exchange runner and a second heat exchange runner are arranged in the deoxidizing structure. According to the steam generator and the heat pump unit, water supplemented into the shell is fed into the deoxidizing structure through the liquid inlet, a high-temperature medium fed into the water chamber is introduced into the second heat exchange flow channel, so that the high-temperature medium can heat the water fed into the first heat exchange flow channel, and the heating steam inlet is further formed, so that the heating efficiency is improved. The steam fed from the heating steam inlet is used for heating water fed from the liquid inlet, at the moment, the steam and the high-temperature medium conduct secondary heating on the water supplemented from the liquid inlet, the heating and deoxidizing effect on the water is guaranteed, and the problem that in the prior art, a thermal deaerator needs to be additionally arranged outside the evaporator for deoxidizing is solved. And the use cost and the occupied area of the steam generator are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange equipment, in particular to a steam generator and a heat pump unit. Background Art

[0002] As a traditional large-capacity evaporator, the horizontal tube full liquid evaporator is widely used in air conditioning refrigeration, heat pump heating, chemical industry and other fields due to its low cost and strong stability. When the evaporator is in operation, the liquid to be evaporated fills the shell side space outside the heat exchange tube (the liquid level is usually slightly higher than the highest point of the heat exchange tube row), and the heat released by the fluid in the tube is transferred to the liquid outside the tube through the tube wall and the fins, causing the liquid to change phase, and the gas generated by boiling heat exchange is discharged from the top of the heat exchanger.

[0003] If the horizontal tube full liquid evaporator is used as a steam generating device, the shell side space outside the heat exchange tube is boiling water, and other hot working fluids are inside the tube. The water is heated by the heat exchange tube to turn it into high-temperature steam. In the high-temperature steam heat pump unit, the steam generator is a device that directly generates steam, and its durability is closely related to the water quality in the shell. The parts of the steam generating device that are prone to oxidation corrosion are the connections between the heat exchange tube bundle and the support plate and tube sheet. The metal wall temperature here is high, the water flow disturbance is severe, and there are many assembly or welding gaps. If the dissolved oxygen content in the make-up water is too high, it will cause serious oxidation corrosion to the shell and tube materials and the gaps, and even cause serious accidents.

[0004] In the boiler system, there are many ways to remove dissolved oxygen from the feed water, such as thermal deoxygenation, vacuum deoxygenation, chemical deoxygenation, rust deoxygenation, etc. The principle of thermal deoxygenation is based on the Henry-Dalton theorem, using part of the produced steam to heat the feed water to a saturated state. At this time, the solubility of oxygen in the water is zero, and oxygen is then precipitated and discharged from the water, and the deoxygenated water is supplied to the boiler to generate steam.

[0005] In the prior art, a thermal deaerator is additionally installed outside the evaporator for deoxidation, which increases the system cost and installation space of the evaporator, seriously affecting the use cost and occupied space of the system of the evaporator. Summary of the invention

[0006] In order to solve the technical problem in the prior art that an additional thermal deaerator is required to affect the use cost and occupied space, a steam generator and a heat pump unit are provided, which perform deoxidation inside the shell and utilize the high-temperature refrigerant in the water chamber and the steam at the heating steam inlet for secondary heating to ensure the deoxidation effect.

[0007] A steam generator, comprising:

[0008] A shell body, wherein a water chamber is provided on the shell body;

[0009] A deoxidation structure, wherein the deoxidation structure is disposed in the shell and is provided with a liquid inlet, a tube sheet air inlet, a tube sheet air outlet, a heating steam inlet and a liquid replenishment port, and the tube sheet air inlet and the tube sheet air outlet are both connected to the water chamber;

[0010] The deoxygenation structure is provided with a first heat exchange channel and a second heat exchange channel, the liquid inlet, the heating steam inlet and the liquid replenishing port are all connected to the first heat exchange channel, the liquid replenishing port is connected to the interior of the shell, the tube sheet air inlet and the tube sheet air outlet are both connected to the second heat exchange channel, and the first heat exchange channel and the second heat exchange channel are relatively sealed and can exchange heat with each other.

[0011] The deoxidation structure includes a baffle assembly, which is disposed in the shell, and the baffle assembly forms the first heat exchange channel and the second heat exchange channel inside the shell.

[0012] The partition assembly includes an air equalizing plate, a first liquid equalizing plate and multiple first partition plates, the first liquid equalizing plate is located below the air equalizing plate, and the first liquid equalizing plate and the air equalizing plate form a secondary heating space, all the first partition plates are evenly distributed in the secondary heating space, and flow channels are formed between two adjacent first partition plates and between the first partition plate and the adjacent shell, and all the flow channels sequentially form the first heat exchange channel and the second heat exchange channel.

[0013] A first connecting section and a second connecting section are formed in the secondary heating space, the first heat exchange channel and the second heat exchange channel are located between the first connecting section and the second connecting section, one end of the second heat exchange channel is connected to the first connecting section, and the other end is connected to the second connecting section, and the tube sheet air inlet and the tube sheet air outlet are both connected to the first connecting section.

[0014] The partition assembly also includes a partition plate, which is arranged in the first connecting section and divides the first connecting section into a first connecting part and a second connecting part. Part of the second heat exchange channel is connected to the first connecting part, and part of the second heat exchange channel is connected to the second connecting part. The tube sheet air inlet is connected to the first connecting part, and the tube sheet air outlet is connected to the second connecting part.

[0015] The steam generator further includes a water chamber partition, which is disposed in the water chamber and divides the water chamber into an inlet and an outlet, the tube sheet air inlet is connected to the inlet, and the tube sheet air outlet is connected to the outlet.

[0016] The partition assembly also includes a baffle, which is disposed in the first heat exchange channel and can separate the first heat exchange channel from the first connecting section; and / or the baffle can separate the first heat exchange channel from the second connecting section.

[0017] The air equalizing plate and the shell together form a spray heating space, the air equalizing plate is provided with air equalizing holes, the first heat exchange channel is connected with the spray heating space through the air equalizing holes, and the liquid inlet and the heating steam inlet are both connected with the spray heating space.

[0018] The deoxygenation structure also includes a first vertical partition, which is arranged in the spray heating space, and the first vertical partition divides the spray heating space into a liquid inlet space and a heating steam space, the liquid inlet space is connected to the first heat exchange channel through some of the gas equalizing holes, the heating steam space is connected to the first heat exchange channel through some of the gas equalizing holes, the liquid inlet is connected to the liquid inlet space, and the heating steam inlet is connected to the heating steam space.

[0019] The air equalizing holes include a first air equalizing hole and a second air equalizing hole. The liquid inlet space is connected to the first heat exchange channel through the first air equalizing hole. The heating steam space is connected to the first heat exchange channel through the second air equalizing hole. The flow area of ​​the second air equalizing hole is greater than the flow area of ​​the first air equalizing hole.

[0020] A first exhaust port is disposed at the upper portion of the spray heating space, and the first exhaust port is communicated with the interior of the shell.

[0021] A first filter structure is disposed at the first exhaust port, and the spray heating space is connected to the interior of the shell through the first filter structure.

[0022] An exhaust passage is formed in the shell, the first exhaust port is communicated with the interior of the shell through the exhaust passage, and a second filter structure is arranged in the exhaust passage.

[0023] The steam generator also includes a second vertical baffle and a third vertical baffle, the second vertical baffle is arranged on the deoxygenation structure, and the second vertical baffle, the air equalizing plate and the corresponding part of the shell together enclose the spray heating space, there is a first distance between the upper edge of the second vertical baffle and the top of the shell, the third vertical baffle is arranged at the top of the shell, and the distance from the lower edge of the third vertical baffle to the liquid level in the shell is smaller than the distance from the upper edge of the second vertical baffle to the liquid level in the shell.

[0024] The steam generator also includes a liquid collecting structure, which is arranged on a portion of the exhaust channel away from the first exhaust port. A liquid collecting port is provided on the liquid collecting structure, and the exhaust channel is connected to the interior of the shell through the liquid collecting port. In a direction away from the first exhaust port, a flow area of ​​the liquid collecting port gradually decreases.

[0025] The plane where the liquid collecting structure is located is arranged obliquely relative to the liquid surface in the shell, and the outflow direction of the liquid collecting port points to the liquid surface in the shell.

[0026] The first liquid balancing plate is provided with a first liquid balancing hole, and the first heat exchange channel is connected with the liquid replenishing port through the first liquid balancing hole.

[0027] The cross section of the first liquid balancing hole is rectangular.

[0028] The partition assembly further includes a second liquid balancing plate, which is disposed below the first liquid balancing plate and has second liquid balancing holes.

[0029] The number of the second liquid balancing plates is at least two, all the second liquid balancing plates are arranged in parallel in a direction away from the first liquid balancing plate, and the second liquid balancing holes on two adjacent second liquid balancing plates are arranged in staggered positions.

[0030] The steam generator further comprises a spray structure, wherein the spray structure is arranged in the spray heating space, and the liquid inlet is communicated with the spray structure.

[0031] The spray structure includes a plurality of atomizing nozzles, and all of the atomizing nozzles are evenly distributed in the spray heating space on a plane parallel to the air equalizing plate.

[0032] The first partition plate is arranged to be inclined relative to the liquid surface in the shell so that the liquid droplets in the first heat exchange flow channel flow along the width direction of the first partition plate.

[0033] The shell is provided with a second exhaust port, and a third filtering structure is provided at the second exhaust port.

[0034] A heat pump unit comprises the above-mentioned steam generator.

[0035] The steam generator and heat pump unit provided by the present invention use a liquid inlet to feed water added to the shell into the deoxygenation structure, and introduce a high-temperature medium fed into the water chamber into the second heat exchange channel, so that the high-temperature medium can heat the water fed into the first heat exchange channel. A heating steam inlet is also provided, and the steam fed into the heating steam inlet also heats the water fed into the liquid inlet. At this time, the steam and the high-temperature medium realize secondary heating of the water added into the liquid inlet, thereby ensuring the heating and deoxygenation effect of the water. This solves the problem in the prior art that an additional thermal deaerator needs to be provided outside the evaporator for deoxygenation, thereby reducing the use cost and occupied area of ​​the steam generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a steam generator provided in an embodiment of the present invention;

[0037] Figure 2 Another structural schematic diagram of a steam generator provided in an embodiment of the present invention;

[0038] Figure 3 Another structural schematic diagram of a steam generator provided in an embodiment of the present invention;

[0039] Figure 4 A schematic structural diagram of a water chamber of a steam generator provided in an embodiment of the present invention;

[0040] Figure 5 A schematic structural diagram of a baffle assembly of a steam generator provided in an embodiment of the present invention;

[0041] Figure 6 A flow diagram of steam and water droplets of a steam generator provided by an embodiment of the present invention;

[0042] Figure 7 A cross-sectional view of a steam generator provided by an embodiment of the present invention;

[0043] Figure 8 A schematic diagram of the structure of the gas distribution plate provided in an embodiment of the present invention;

[0044] Fig. 9 A schematic structural diagram of a first liquid balancing plate provided in an embodiment of the present invention;

[0045] Fig.10 A schematic diagram of the structure of a second liquid balancing plate provided in an embodiment of the present invention;

[0046] Fig.11 A schematic diagram of the structure of a baffle provided in an embodiment of the present invention;

[0047] Fig.12 A schematic diagram of the structure of a liquid inlet and an atomizing nozzle provided in an embodiment of the present invention;

[0048] Fig.13 A schematic structural diagram of a liquid collecting structure provided by an embodiment of the present invention;

[0049] Fig.14 Another schematic diagram of the structure of the liquid collecting structure provided by an embodiment of the present invention;

[0050] In the figure:

[0051] 1. Shell; 2. Water chamber; 31. Liquid inlet; 32. Tube sheet air inlet; 33. Tube sheet air outlet; 34. Heating steam inlet; 35. Liquid replenishment port; 36. First heat exchange channel; 37. Second heat exchange channel; 41. Gas equalizing plate; 42. First liquid equalizing plate; 43. First partition plate; 101. Secondary heating space; 102. First connecting section; 103. Second connecting section; 44. Partitioning partition plate; 1021. First connecting part; 1022. Second connecting part; 21. Water chamber partition plate; 22. Inflow part; 23. Outflow part; 45. baffle; 104. spray heating space; 51. first vertical partition; 105. liquid inlet space; 106. heating steam space; 411. first air equalizing hole; 412. second air equalizing hole; 46. first exhaust port; 6. first filter structure; 7. second filter structure; 52. second vertical partition; 53. third vertical partition; 8. liquid collecting structure; 81. liquid collecting port; 421. first liquid equalizing hole; 47. second liquid equalizing plate; 471. second liquid equalizing hole; 9. atomizing nozzle; 11. second exhaust port; 10. third filter structure. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The horizontal tube full liquid evaporator is used as a steam generating device. The shell side space outside the heat exchange tube is boiling water, and other hot working fluids are inside the tube. The water is heated by the heat exchange tube to turn it into high-temperature steam. In the high-temperature steam heat pump unit, the steam generator is a device that directly generates steam, and its durability is closely related to the water quality in the shell. The parts of the steam generating device that are prone to oxidation corrosion are the connections between the heat exchange tube bundle and the support plate and tube sheet. The metal wall temperature here is high, the water flow disturbance is severe, and there are many assembly or welding gaps. If the dissolved oxygen content in the make-up water is too high, it will cause serious oxidation corrosion to the shell and tube materials and the gaps, and even cause serious accidents.

[0058] In the boiler system, there are many ways to remove dissolved oxygen in the feed water, such as thermal deoxygenation, vacuum deoxygenation, chemical deoxygenation, rust deoxygenation, etc. The principle of thermal deoxygenation is based on the Henry-Dalton theorem, and a part of the output steam is used to heat the feed water to a saturated state. At this time, the solubility of oxygen in the water is zero, and the oxygen is then precipitated and discharged from the water, and the deoxygenated water is supplied to the boiler to generate steam. In the prior art, an additional thermal deaerator is set outside the evaporator for deoxygenation, which increases the cost of the system where the evaporator is located and the installation space, which seriously affects the use cost and occupied space of the system where the evaporator is located.

[0059] To this end, the present application provides a Figures 1 to 14 The steam generator shown comprises: a shell 1, on which a water chamber 2 is provided; a deoxidation structure, which is arranged in the shell 1 and is provided with a liquid inlet 31, a tube sheet air inlet 32, a tube sheet air outlet 33, a heating steam inlet 34 and a liquid replenishment port 35, and the tube sheet air inlet 32 ​​and the tube sheet air outlet 33 are both connected to the water chamber 2; a first heat exchange flow channel 36 and a second heat exchange flow channel 37 are provided in the deoxidation structure, the liquid inlet 31, the heating steam inlet 34 and the liquid replenishment port 35 are all connected to the first heat exchange flow channel 36, the liquid replenishment port 35 is connected to the interior of the shell 1, the tube sheet air inlet 32 ​​and the tube sheet air outlet 33 are both connected to the second heat exchange flow channel 37, and the first heat exchange flow channel 36 and the second heat exchange flow channel 37 are relatively sealed and can exchange heat with each other. The water added to the shell 1 is fed into the deoxygenation structure by means of the liquid inlet 31, and the high-temperature medium fed into the water chamber 2 is introduced into the second heat exchange channel 37, so that the high-temperature medium can heat the water fed into the first heat exchange channel 36. A heating steam inlet 34 is also provided, and the steam fed into the heating steam inlet 34 also heats the water fed into the liquid inlet 31. At this time, the steam and the high-temperature medium realize secondary heating of the water added into the liquid inlet 31, ensuring the heating and deoxygenation effect of the water, solving the problem of the prior art that an additional thermal deaerator needs to be set outside the evaporator for deoxygenation, and reducing the use cost and occupied area of ​​the steam generator. Among them, the water fed into the liquid inlet 31 is desalted water, which refers to water in which most or all of the soluble solids (such as minerals and salts) in the water are removed through a specific treatment process. This water is usually used for boiler feed water in industrial production processes, cooling systems, cleaning fluids in the electronics industry, pharmaceutical industry, and laboratory water, because these applications have very high requirements for water quality and need to reduce impurities in the water as much as possible to avoid equipment corrosion, scaling, or affecting product quality. The supplementary water fed into the liquid inlet 31 is heated twice by the steam fed into the heated steam inlet 34 and the high-temperature working medium in the water chamber 2 to complete the escape of oxygen. Finally, the supplementary water is fed into the shell 1 from the liquid replenishment port 35 to complete the water replenishment of the steam generator.

[0060] Preferably, the water chamber 2 is located at a side end of the shell 1 , and the water chamber 2 can be divided at the end of the shell 1 by arranging a tube sheet in the shell 1 .

[0061] The deoxidation structure includes a baffle assembly, which is disposed in the shell 1 and forms the first heat exchange channel 36 and the second heat exchange channel 37 in the shell 1. The baffle assembly is used to restrict the inside of the shell 1 to ensure that the water fed from the liquid inlet 31 and the high-temperature working medium in the water chamber 2 will not mix, thereby ensuring the reliability of the steam generation structure.

[0062] Specifically, the partition assembly includes an air equalizing plate 41, a first liquid equalizing plate 42 and multiple first partition plates 43, the first liquid equalizing plate 42 is located below the air equalizing plate 41, and the first liquid equalizing plate 42 and the air equalizing plate 41 form a secondary heating space 101, all of the first partition plates 43 are evenly distributed in the secondary heating space 101, and flow channels are formed between two adjacent first partition plates 43 and between the first partition plate 43 and the adjacent shell 1, and all of the flow channels sequentially form the first heat exchange channel 36 and the second heat exchange channel 37. At this time, the gas equalizing plate 41 constitutes the upper plate of the secondary heating space 101, the first liquid equalizing plate 42 constitutes the lower plate of the secondary heating space 101, and the first partition plate 43 divides the secondary heating space 101 into a plurality of long strips of flow channels, and defines the flow channels as the first heat exchange flow channel 36 and the second heat exchange flow channel 37 in sequence along the direction of the parallel arrangement of the flow channels. At this time, the first heat exchange flow channel 36 and the second heat exchange flow channel 37 are separated and sealed by the first partition plate 43 therebetween, and at the same time, the fluid in the first heat exchange flow channel 36 and the fluid in the second heat exchange flow channel 37 can exchange heat through the first partition plate 43. At this time, the high-temperature working medium fed into the tube sheet air inlet 32 ​​can exchange heat with the supplementary water fed into the liquid inlet 31, so as to realize heating and deoxygenation of the supplementary water, and ensure the heating capacity and deoxygenation capacity of the supplementary water. Among them, the first liquid equalizing hole on the first liquid equalizing plate 42 constitutes the liquid replenishing port 35 of the deoxygenation structure. The edges of the gas equalizing plate 41 and the first liquid equalizing plate 42 are both sealed and matched with corresponding parts of the housing 1 .

[0063] A first connecting section 102 and a second connecting section 103 are formed in the secondary heating space 101, the first heat exchange channel 36 and the second heat exchange channel 37 are located between the first connecting section 102 and the second connecting section 103, one end of the second heat exchange channel 37 is connected to the first connecting section 102, and the other end is connected to the second connecting section 103, and the tube sheet air inlet 32 ​​and the tube sheet air outlet 33 are both connected to the first connecting section 102. The first connecting section 102 is used to allow the high-temperature working medium in the water chamber 2 to be simultaneously delivered to multiple second heat exchange channels 37 through the tube sheet air inlet 32, thereby ensuring the fluid supply of the second heat exchange channels 37. The second connecting section 103 is also used to connect the tube sheet air outlet 33 with multiple second heat exchange channels 37, thereby ensuring that the high-temperature working medium that has completed heat exchange can smoothly flow back into the water chamber 2. At the same time, in order to enable the high-temperature working medium to be discharged from the tube sheet air outlet 33 after heat exchange in the second heat exchange channels 37, the second connecting section 103 is able to connect all the second heat exchange channels 37, thereby allowing the high-temperature working medium delivered through the tube sheet air inlet 32 ​​to flow through part of the second heat exchange channels 37 and then reach the second connecting section 103, and then flow through the remaining part of the second heat exchange channels 37 to the tube sheet air outlet 33 and enter the water chamber 2, thereby completing the circulation of the high-temperature working medium.

[0064] Specifically, the partition assembly also includes a partition plate 44, which is arranged in the first connecting section 102, and the partition plate 44 separates the first connecting section 102 into a first connecting part 1021 and a second connecting part 1022, part of the second heat exchange channel 37 is connected to the first connecting part 1021, part of the second heat exchange channel 37 is connected to the second connecting part 1022, the tube sheet air inlet 32 ​​is connected to the first connecting part 1021, and the tube sheet air outlet 33 is connected to the second connecting part 1022. The first connecting section 102 is separated by a partition plate 44 to ensure reliable separation between the tube sheet air inlet 32 ​​and the tube sheet air outlet 33. The high-temperature working medium in the water chamber 2 can only flow back to the water chamber 2 through the tube sheet air inlet 32, the first connecting part 1021, the second heat exchange channel 37 connected to the first connecting part 1021, the second connecting section 103, the second heat exchange channel 37 connected to the second connecting part 1022, the second connecting part 1022 and the tube sheet air outlet 33 in sequence, thereby ensuring reliable circulation of the high-temperature working medium.

[0065] The steam generator further comprises a water chamber partition 21, which is disposed in the water chamber 2 and divides the water chamber 2 into an inlet 22 and an outlet 23. The tube sheet air inlet 32 ​​is connected to the inlet 22, and the tube sheet air outlet 33 is connected to the outlet 23. The water chamber 2 is divided by the water chamber partition 21, and the high-temperature working medium sent from the outside into the water chamber 2 will first be sent into the inlet 22, flow in the second heat exchange channel 37 for heat exchange, and then flow back to the outlet 23, and then sent to the heat exchange tube in the shell 1 through the outlet 23 for heat exchange. Since the heat consumed by heat exchange in the second heat exchange channel 37 is relatively small, the high-temperature working medium sent into the heat exchange tube from the outlet 23 can still meet the steam production purpose of the steam generator.

[0066] A second partition is also provided in the water chamber 2, and the second partition divides the outflow portion 23 into two parts, thereby increasing the tube path in the steam generator and improving the heat exchange efficiency between the water in the steam generator and the high-temperature working medium in the heat exchange tube.

[0067] Since the first heat exchange channel 36 and the second heat exchange channel 37 are separated by the first partition plate 43, the first heat exchange channel 36 is structurally connected to the first connecting section 102 and the second connecting section 103. In practice, the first heat exchange channel 36 needs to be separated from the first connecting section 102 and the second connecting section 103 to avoid mixing of the supplementary water, steam, etc. in the first heat exchange channel 36 with the working fluid that needs to flow through the heat exchange tube in the water chamber 2. For this purpose, the partition assembly also includes a baffle 45, which is arranged in the first heat exchange channel 36, and the baffle 45 can separate the first heat exchange channel 36 from the first connecting section 102. The baffle 45 can separate the first heat exchange channel 36 from the second connecting section 103. The baffle 45 is used to separate the first heat exchange channel 36 to ensure the sealing effect of the first heat exchange channel 36 and the first connecting section 102 and the second connecting section 103, thereby ensuring the working reliability of the steam generator.

[0068] Furthermore, the gas equalizing plate 41 and the shell 1 together enclose a spray heating space 104, the gas equalizing plate 41 is provided with gas equalizing holes, the first heat exchange channel 36 is connected to the spray heating space 104 through the gas equalizing holes, and the liquid inlet 31 and the heating steam inlet 34 are both connected to the spray heating space 104. The supplementary water fed into the liquid inlet 31 can first exchange heat with the steam fed into the heating steam inlet 34 in the spray heating space 104, and then be heated again by the high-temperature working medium when fed into the first heat exchange channel 36, thereby fully ensuring the heating and deoxygenation effect of the supplementary water fed into the liquid inlet 31 and ensuring the reliability of the steam generator.

[0069] The deoxygenation structure also includes a first vertical partition 51, which is arranged in the spray heating space 104, and the first vertical partition 51 divides the spray heating space 104 into a liquid inlet space 105 and a heating steam space 106, the liquid inlet space 105 is connected to the first heat exchange channel 36 through some of the gas equalizing holes, the heating steam space 106 is connected to the first heat exchange channel 36 through some of the gas equalizing holes, the liquid inlet 31 is connected to the liquid inlet space 105, and the heating steam inlet 34 is connected to the heating steam space 106. The spray heating space 104 is divided by the first vertical partition 51, and the liquid inlet 31 and the heating steam inlet 34 are separated. The supplementary water sent into the liquid inlet 31 will enter the liquid inlet space 105, and the steam entering the heating steam inlet 34 will first enter the heating steam space 106, and then enter the first heat exchange channel 36 through the heating steam space 106. Since the first heat exchange channel 36 is connected to the liquid inlet space 105, the steam sent into the heating steam inlet 34 can enter the liquid inlet space 105 through the heating steam space 106, the first heat exchange channel 36, and the air balancing hole in sequence. In the space 105, heat exchange between steam and make-up water is realized in the liquid inlet space 105, and because the first heat exchange flow channel 36 is located below the liquid inlet space 105, the steam flows upward when flowing into the liquid inlet space 105, and the make-up water fed into the liquid inlet 31 is water droplets, and the water droplets will flow downward under the action of gravity. At this time, the water droplets and steam will produce an upward and downward collision at the air pores, and the steam will blow the water droplets upward to cause the water droplets to break, which can further increase the heat exchange efficiency between steam and water droplets, improve the heating and deoxygenation effect of the make-up water, and ensure the structural reliability of the steam generator.

[0070] The air equalizing holes include a first air equalizing hole 411 and a second air equalizing hole 412. The liquid inlet space 105 is connected to the first heat exchange channel 36 through the first air equalizing hole 411, and the heating steam space 106 is connected to the first heat exchange channel 36 through the second air equalizing hole 412. The flow area of ​​the second air equalizing hole 412 is larger than the flow area of ​​the first air equalizing hole 411. Since the steam fed into the heating steam inlet 34 is mainly used to heat the supplementary water fed into the liquid inlet 31, the second air equalizing hole 412 is enlarged to avoid obstruction to this part of the steam, so that the steam can smoothly enter the first heat exchange channel 36. Since the water fed into the liquid inlet 31 is water droplets, the first air equalizing hole 411 with a smaller size can increase the flow rate of the steam entering the liquid inlet space 105 through the first heat exchange channel 36, further increase the effect of water droplet breakage and heat exchange, improve the heating and deoxygenation effect of the supplementary water, and ensure the structural reliability of the steam generator.

[0071] Since the liquid inlet 31 feeds supplementary water into the spray heating space 104, and the heating steam inlet 34 feeds steam into the spray heating space 104, a first exhaust port 46 is provided at the upper part of the spray heating space 104, and the first exhaust port 46 is connected to the inside of the shell 1. The steam that completes the heat exchange in the spray heating space 104, the steam generated after the supplementary water is heated, and the oxygen separated during the heating of the supplementary water are fed into the shell 1 through the first exhaust port 46, and finally discharged through the gas outlet on the shell 1. The supplementary water that has completed thermal deoxygenation but has not been heated into steam can be fed into the shell 1 through the liquid balancing holes on the first liquid balancing plate 42 to complete the water replenishment in the shell 1.

[0072] The first filter structure 6 is provided at the first exhaust port 46, and the spray heating space 104 is connected to the interior of the housing 1 through the first filter structure 6. The gaseous substances (including steam, oxygen, etc.) discharged from the first exhaust port 46 may contain water droplets. At this time, the first filter structure 6 can filter the gaseous substances that are about to flow through the first exhaust port 46 and discharge, filter the water droplets contained therein and return them to the spray heating space 104, so as to avoid the presence of water droplets at the air outlet of the housing 1 and affect the normal operation of other structures, such as other structures obtaining steam with water droplets from the steam generator and causing the problem of inhaling liquid.

[0073] An exhaust passage is formed in the shell 1, and the first exhaust port 46 is connected to the interior of the shell 1 through the exhaust passage. A second filter structure 7 is provided in the exhaust passage. The second filter structure 7 is used to further filter the gaseous material discharged from the first exhaust port 46, thereby reducing the content of water droplets in the gaseous material sent into the shell 1 and improving the reliability of the steam generator.

[0074] The steam generator further includes a second vertical baffle 52 and a third vertical baffle 53. The second vertical baffle 52 is arranged on the deoxidation structure, and the second vertical baffle 52, the gas equalizing plate 41 and the corresponding part of the shell 1 together enclose the spray heating space 104. There is a first spacing between the upper edge of the second vertical baffle 52 and the top of the shell 1. The third vertical baffle 53 is arranged on the top of the shell 1, and the distance from the lower edge of the third vertical baffle 53 to the liquid surface in the shell 1 is smaller than the distance from the upper edge of the second vertical baffle 52 to the liquid surface in the shell 1. The exhaust channel is formed in the shell 1 by the second vertical baffle 52 and the third vertical baffle 53, and the positional relationship formed by the second vertical baffle 52 and the third vertical baffle 53 is used to make the exhaust channel have a bent part. At this time, steam and oxygen need to bend and flow in the exhaust channel. The bent flow is used to further increase the gas-liquid separation effect of the gaseous substance discharged from the first exhaust port 46, thereby improving the reliability of the steam generator.

[0075] The steam generator further comprises a liquid collecting structure 8, which is arranged on the part of the exhaust channel away from the first exhaust port 46, and a liquid collecting port 81 is arranged on the liquid collecting structure 8, through which the exhaust channel is connected to the inside of the shell 1, and the flow area of ​​the liquid collecting port 81 gradually decreases in the direction away from the first exhaust port 46. The liquid collecting structure 8 is used to collect the water droplets gathered by the deflection in the exhaust channel and the water droplets gathered after being filtered by the second filter structure 7, and send them into the shell 1 through the liquid collecting port 81, so as to avoid the water droplets being discharged directly through the gas outlet of the shell 1, thereby ensuring the reliability of the steam generator. Moreover, the flow area of ​​the liquid collecting port 81 is gradually reduced, which can increase the flow rate of the gas material discharged from the first exhaust port 46 to send the gathered water droplets into the shell 1, and can also prevent the steam in the shell 1 from entering the exhaust channel through the liquid collecting port 81 in the reverse direction, thereby ensuring the working reliability of the steam generator and the deoxidation structure.

[0076] The plane where the liquid collecting structure 8 is located is inclined relative to the liquid surface in the shell 1, and the outflow direction of the liquid collecting port 81 points to the liquid surface in the shell 1. By arranging the liquid collecting structure 8 obliquely, the ability of the collected water droplets to fall into the shell 1 can be increased.

[0077] The first liquid balancing plate 42 is provided with a first liquid balancing hole 421, and the first heat exchange channel 36 is connected with the liquid replenishing port 35 through the first liquid balancing hole 421. By providing the first liquid balancing hole 421, the replenishing water fed into the liquid inlet 31 can be evenly diverted and enter the first heat exchange channel 36, so that the size of the water droplets entering the first heat exchange channel 36 is small, thereby ensuring the heating capacity of the high-temperature working medium in the second heat exchange channel 37 for the replenishing water, and the flow rate of the steam fed into the heating steam inlet 34 can be increased, thereby improving the fragmentation degree of the replenishing water in the liquid inlet space 105, and further improving the heating and deoxygenation effect of the replenishing water.

[0078] The cross section of the first liquid balancing hole 421 is a rectangle. The rectangular shape facilitates the liquid droplets to flow downward from the edge of the first liquid balancing hole 421, thereby ensuring the ability of the liquid in the first fluid channel to flow downward.

[0079] The partition assembly further includes a second liquid balancing plate 47, which is disposed below the first liquid balancing plate 42, and is provided with a second liquid balancing hole 471. The second liquid balancing plate 47 and the second liquid balancing hole 471 are used to further evenly distribute the water droplets from the deoxidation structure that are about to drip into the shell 1, thereby reducing the size of the water droplets dripping onto the liquid surface in the shell 1, thereby reducing the splashing of water in the shell 1, and ensuring the reliable operation of the steam generator.

[0080] The number of the second liquid equalizing plates 47 is at least two, and all the second liquid equalizing plates 47 are arranged in parallel in a direction away from the first liquid equalizing plate 42, and the second liquid equalizing holes 471 on two adjacent second liquid equalizing plates 47 are staggered. The use of multiple second liquid equalizing plates 47 can further increase the uniform distribution of water droplets that are about to drip into the shell 1 from the deoxygenation structure, further reduce the splashing of water in the shell 1, and improve the working reliability of the steam generator. Preferably, the shape of the second liquid equalizing hole 471 is circular, and the circular 360° symmetrical structure is not easy to disperse when the fluid passes through, ensuring that the deoxygenated water can smoothly reach the liquid surface of the shell, avoiding the problem of liquid splashing in the shell.

[0081] The steam generator further includes a spray structure, which is disposed in the spray heating space 104, and the liquid inlet 31 is connected to the spray structure. The supplementary water fed into the liquid inlet 31 is sprayed by the spray structure to reduce the volume of the water droplets of the supplementary water as much as possible, thereby increasing the heating capacity of the supplementary water, thereby improving the deoxidation capacity of the deoxidation structure, and further improving the reliability of the steam generator.

[0082] The spray structure includes a plurality of atomizing nozzles 9, and all of the atomizing nozzles 9 are evenly distributed in the spray heating space 104 on a plane parallel to the gas equalizing plate 41. The supplementary water is evenly distributed in the spray heating space 104 (liquid inlet space 105) by using a plurality of atomizing nozzles 9, thereby increasing the heating capacity of the supplementary water, thereby improving the deoxidation capacity of the deoxidation structure, and further improving the reliability of the steam generator.

[0083] The first partition plate 43 is tilted relative to the liquid surface in the shell 1 so that the liquid droplets in the first heat exchange channel 36 flow along the width direction of the first partition plate 43. The mist water droplets in the first heat exchange channel 36 can be gathered on the first partition plate 43, so that they can reach the first liquid balancing hole 421 on the first liquid balancing plate 42 and drip downward, and the contact position between the first partition plate 43 and the first liquid balancing plate 42 is a straight line, which can further facilitate the flow of the gathered water droplets and ensure the water replenishment effect in the shell 1.

[0084] The housing 1 is provided with a second exhaust port 11, and a third filter structure 10 is provided at the second exhaust port 11. The third filter structure 10 is used to filter the steam to be sent out of the housing 1 and the separated oxygen, so as to ensure that the gaseous substances discharged from the steam generator basically do not contain water droplets, avoid the exhaust of the steam generator with liquid, and ensure the working reliability of the steam generator.

[0085] A heat pump unit comprises the above-mentioned steam generator.

[0086] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A steam generator, characterized in that: include: A housing (1), wherein a water chamber (2) is provided on the housing (1); a deoxidation structure, the deoxidation structure being arranged in the shell (1), and being provided with a liquid inlet (31), a tube sheet air inlet (32), a tube sheet air outlet (33), a heating steam inlet (34) and a liquid replenishment port (35), the tube sheet air inlet (32) and the tube sheet air outlet (33) both being in communication with the water chamber (2); A first heat exchange channel (36) and a second heat exchange channel (37) are provided in the deoxidation structure; the liquid inlet (31), the heating steam inlet (34) and the liquid replenishment port (35) are all in communication with the first heat exchange channel (36); the liquid replenishment port (35) is in communication with the interior of the shell (1); the tube sheet air inlet (32) and the tube sheet air outlet (33) are both in communication with the second heat exchange channel (37); the first heat exchange channel (36) and the second heat exchange channel (37) are relatively sealed and can exchange heat with each other.

2. The steam generator according to claim 1, characterized in that: The deoxidation structure comprises a baffle assembly, wherein the baffle assembly is arranged in the shell (1), and the baffle assembly forms the first heat exchange channel (36) and the second heat exchange channel (37) inside the shell (1).

3. The steam generator according to claim 2, characterized in that: The partition assembly includes an air equalizing plate (41), a first liquid equalizing plate (42) and a plurality of first partition plates (43); the first liquid equalizing plate (42) is located below the air equalizing plate (41), and the first liquid equalizing plate (42) and the air equalizing plate (41) form a secondary heating space (101); all the first partition plates (43) are evenly distributed in the secondary heating space (101), and flow channels are formed between two adjacent first partition plates (43) and between the first partition plate (43) and the adjacent shell (1); all the flow channels sequentially form the first heat exchange channel (36) and the second heat exchange channel (37).

4. The steam generator according to claim 3, characterized in that: A first connecting section (102) and a second connecting section (103) are formed in the secondary heating space (101); the first heat exchange channel (36) and the second heat exchange channel (37) are located between the first connecting section (102) and the second connecting section (103); one end of the second heat exchange channel (37) is connected to the first connecting section (102), and the other end is connected to the second connecting section (103); the tube sheet air inlet (32) and the tube sheet air outlet (33) are both connected to the first connecting section (102).

5. The steam generator according to claim 4, characterized in that: The partition assembly also includes a partition (44), which is arranged in the first connecting section (102), and the partition (44) divides the first connecting section (102) into a first connecting part (1021) and a second connecting part (1022), a part of the second heat exchange channel (37) is connected to the first connecting part (1021), a part of the second heat exchange channel (37) is connected to the second connecting part (1022), the tube sheet air inlet (32) is connected to the first connecting part (1021), and the tube sheet air outlet (33) is connected to the second connecting part (1022).

6. The steam generator according to claim 5, characterized in that: The steam generator further comprises a water chamber partition (21), wherein the water chamber partition (21) is arranged in the water chamber (2), and the water chamber partition (21) divides the water chamber (2) into an inlet portion (22) and an outlet portion (23), the tube sheet air inlet (32) is connected to the inlet portion (22), and the tube sheet air outlet (33) is connected to the outlet portion (23).

7. The steam generator according to claim 4, characterized in that: The partition assembly also includes a baffle (45), wherein the baffle (45) is disposed in the first heat exchange channel (36), and the baffle (45) is capable of separating the first heat exchange channel (36) from the first connecting section (102); and / or the baffle (45) is capable of separating the first heat exchange channel (36) from the second connecting section (103).

8. The steam generator according to claim 3, characterized in that: The air equalizing plate (41) and the shell (1) together enclose a spray heating space (104); an air equalizing hole is provided on the air equalizing plate (41); the first heat exchange channel (36) is connected to the spray heating space (104) through the air equalizing hole; and the liquid inlet (31) and the heating steam inlet (34) are both connected to the spray heating space (104).

9. The steam generator according to claim 8, characterized in that: The deoxygenation structure further comprises a first vertical partition (51), which is arranged in the spray heating space (104), and the first vertical partition (51) divides the spray heating space (104) into a liquid inlet space (105) and a heating steam space (106), the liquid inlet space (105) is connected to the first heat exchange channel (36) through part of the gas equalizing holes, the heating steam space (106) is connected to the first heat exchange channel (36) through part of the gas equalizing holes, the liquid inlet (31) is connected to the liquid inlet space (105), and the heating steam inlet (34) is connected to the heating steam space (106).

10. The steam generator according to claim 9, characterized in that: The air equalizing holes include a first air equalizing hole (411) and a second air equalizing hole (412); the liquid inlet space (105) is connected to the first heat exchange channel (36) through the first air equalizing hole (411); the heating steam space (106) is connected to the first heat exchange channel (36) through the second air equalizing hole (412); and the flow area of ​​the second air equalizing hole (412) is greater than the flow area of ​​the first air equalizing hole (411).

11. The steam generator according to claim 8, characterized in that: A first exhaust port (46) is provided at the upper portion of the spray heating space (104), and the first exhaust port (46) is communicated with the interior of the shell (1).

12. The steam generator according to claim 11, characterized in that: A first filter structure (6) is provided at the first exhaust port (46), and the spray heating space (104) is connected to the interior of the housing (1) through the first filter structure (6).

13. The steam generator according to claim 11, characterized in that: An exhaust passage is formed in the shell (1), the first exhaust port (46) is connected to the interior of the shell (1) through the exhaust passage, and a second filter structure (7) is provided in the exhaust passage.

14. The steam generator according to claim 13, characterized in that: The steam generator further comprises a second vertical baffle (52) and a third vertical baffle (53), wherein the second vertical baffle (52) is arranged on the deoxygenation structure, and the second vertical baffle (52), the gas equalizing plate (41) and a corresponding part of the shell (1) together enclose the spray heating space (104), and there is a first distance between the upper edge of the second vertical baffle (52) and the top of the shell (1), and the third vertical baffle (53) is arranged on the top of the shell (1), and the distance from the lower edge of the third vertical baffle (53) to the liquid level in the shell (1) is smaller than the distance from the upper edge of the second vertical baffle (52) to the liquid level in the shell (1).

15. The steam generator according to claim 13, characterized in that: The steam generator further comprises a liquid collecting structure (8), the liquid collecting structure (8) being arranged on a portion of the exhaust channel away from the first exhaust port (46), the liquid collecting structure (8) being provided with a liquid collecting port (81), the exhaust channel being connected to the interior of the shell (1) via the liquid collecting port (81), and the flow area of ​​the liquid collecting port (81) gradually decreasing in a direction away from the first exhaust port (46).

16. The steam generator according to claim 15, characterized in that: The plane where the liquid collecting structure (8) is located is arranged obliquely relative to the liquid surface in the shell (1), and the outflow direction of the liquid collecting port (81) points to the liquid surface in the shell (1).

17. The steam generator according to claim 3, characterized in that: The first liquid balancing plate (42) is provided with a first liquid balancing hole (421), and the first heat exchange channel (36) is connected to the liquid replenishing port (35) through the first liquid balancing hole (421).

18. The steam generator according to claim 17, characterized in that: The cross section of the first liquid equalizing hole (421) is rectangular.

19. The steam generator according to claim 3, characterized in that: The partition assembly further comprises a second liquid balancing plate (47), wherein the second liquid balancing plate (47) is arranged below the first liquid balancing plate (42), and a second liquid balancing hole (471) is arranged on the second liquid balancing plate (47).

20. The steam generator according to claim 19, characterized in that: The number of the second liquid balancing plates (47) is at least two, all of the second liquid balancing plates (47) are arranged in parallel in a direction away from the first liquid balancing plate (42), and the second liquid balancing holes (471) on two adjacent second liquid balancing plates (47) are arranged in a staggered manner.

21. The steam generator according to claim 8, characterized in that: The steam generator further comprises a spray structure, wherein the spray structure is arranged in the spray heating space (104), and the liquid inlet (31) is connected to the spray structure.

22. The steam generator according to claim 21, characterized in that: The spray structure comprises a plurality of atomizing nozzles (9), and all of the atomizing nozzles (9) are evenly distributed in the spray heating space (104) on a plane parallel to the air equalizing plate (41).

23. The steam generator according to claim 3, characterized in that: The first partition plate (43) is arranged to be inclined relative to the liquid surface in the shell (1) so that the liquid droplets in the first heat exchange flow channel (36) flow along the width direction of the first partition plate (43).

24. The steam generator according to claim 1, characterized in that: The housing (1) is provided with a second exhaust port (11), and a third filtering structure (10) is provided at the second exhaust port (11).

25. A heat pump unit, characterized in that: A steam generator comprising any one of claims 1 to 24.

Images