Efficient plate heat exchanger

Abstract

The invention relates to the technical field of heat exchange equipment, in particular to an efficient plate heat exchanger which comprises a shell assembly and a core plate assembly. The shell assembly at least comprises a rectangular pipe cavity, a hot air inlet, a hot air outlet, a cold side air outlet pipe and a cold side air inlet pipe. The core plate assembly comprises foundation plate pairs which are arrayed at equal intervals in the longitudinal direction; the front portion, the left side and the right side of the foundation plate are fixed through the auxiliary supporting pieces. The rear portion of the foundation plate is fixed through the main supporting piece. The main supporting piece comprises a main supporting plate and buckling lock bodies, and plate pair lock heads matched with the buckling lock bodies in a one-to-one inserting mode are arranged behind the lower end face of the base plate pair. According to the efficient plate heat exchanger, the foundation plate pair of the core plate assembly can be rapidly supported and fixed through the auxiliary supporting piece and the main supporting piece, according to the efficient plate heat exchanger, the spraying pipeline is arranged to introduce alkaline steam formed after low-temperature steam is blended, and the heat exchange efficiency is improved in cooperation with flue gas heat release.

Description

Technical Field

[0001] This application relates to the field of heat exchange equipment technology, specifically to a high-efficiency plate heat exchanger. Background Technology

[0002] To align with dual-carbon goals, energy recovery equipment is being widely applied. Upgrading and retrofitting older, high-energy-consuming equipment in industries such as power, steel, and refining is necessary. Limited by site space, new equipment must be highly compact. Plate heat exchangers are compact and highly efficient heat exchange devices, primarily consisting of a core plate assembly composed of parallel stacked hollow substrates and an outer shell assembly supporting the core plate assembly and facilitating the flow of cold and hot media.

[0003] Existing plate heat exchangers have the following problems:

[0004] 1. Since hollow substrates are made of thin-shell hollow materials, individual support blocks are usually used to provide fixed support during the stacking process. However, since there are many hollow substrates stacked and each side needs to be supported, it takes a lot of manpower to place the support blocks between the hollow substrates.

[0005] 2. Most existing plate heat exchangers use flue gas as a single heat source to heat air, a cold medium. This process is always a gas-to-gas heat exchange and does not involve a phase change, so there is still room for improvement in heat exchange efficiency. Summary of the Invention

[0006] A high-efficiency plate heat exchanger includes a shell assembly and a core plate assembly disposed within the shell assembly.

[0007] The outer casing assembly includes at least a rectangular cavity that extends through the left and right sides. The rectangular cavity has a hot air inlet and a hot air outlet on the left and right sides, respectively. The rear end face of the rectangular cavity has a cold-side air outlet pipe and a cold-side air inlet pipe that are connected to the rectangular cavity on the left and right sides, respectively. The rear end of the hot air inlet is provided with a spray pipe for injecting alkaline steam.

[0008] The hot air inlet is also equipped with at least three intake adjustment fan blades.

[0009] The core plate assembly includes a pair of base plates arranged at equal intervals along the longitudinal direction. The front, left, and right sides of each base plate pair are fixed by auxiliary support members, and the rear of each base plate pair is fixed by a main support member. Each base plate pair consists of two symmetrically distributed upper and lower plates. The four perimeters of the two plates are pressed together to form a sealing edge. The interior of the two plates maintains a vertical spacing to form an internal cavity. A pressing line is set within the internal cavity to form a flow channel. The left and right rear ends of the sealing edge are respectively provided with a cold-side outlet and a cold-side inlet, communicating with the flow channel. The rear ends of the cold-side outlet and inlet are respectively connected to a cold-side exhaust pipe and a cold-side intake pipe. Each base plate pair has a condensate outlet on its left and right front ends. The auxiliary support members include a longitudinally arranged auxiliary support plate and auxiliary spacers evenly spaced on the auxiliary support plate, corresponding one-to-one with each base plate pair.

[0010] The main support component includes a main support plate arranged longitudinally, and fastening lock bodies arranged at equal intervals on the main support plate and corresponding one-to-one with the base plate. The base plate has a plate-to-lock head that is inserted and engaged with the fastening lock body one-to-one at the rear of the lower end face.

[0011] The main support plate includes a longitudinal plate body, a longitudinal insertion hole located on the right side of the longitudinal plate body, a right-side hole located on the right side of the longitudinal insertion hole, a longitudinal plate bottom spring located in the longitudinal insertion hole, a sliding insertion rod located on the longitudinal plate bottom spring, and an unlocking pressure plate located at equal intervals on the right side of the sliding insertion rod and corresponding to the locking body.

[0012] The locking body includes a lock body shell, a lock body rotor, a rotating assembly, and a longitudinal movement assembly;

[0013] The lock body shell includes a rectangular shell, a vertical insertion groove located at the front of the rectangular shell, a right semicircular groove located to the right of the vertical insertion groove, a right arc-shaped groove located in the middle of the right semicircular groove, an arc-shaped right widening groove located at the outer edge of the right arc-shaped groove, a circular inner cavity located to the right of the right widening groove and connected thereto, a rectangular rear cavity located at the rear end of the circular inner cavity, a rear opening located at the rear end of the rectangular rear cavity, and a spring spindle located in the rectangular rear cavity.

[0014] The lock body rotor includes a semi-circular first rotor, a right connecting plate disposed on the outer edge of the first rotor and inserted into the right arc-shaped groove, a right arc-shaped plate disposed on the outer edge of the right connecting plate and inserted into the right widening groove, a drive gear disposed on the outer edge of the right arc-shaped plate, and a lock body compression spring disposed in the right widening groove.

[0015] The rotating assembly includes a rotatable rotating column disposed in a circular inner cavity, a driven gear disposed on the left side of the rotating column and meshing with the driving gear, and an inclined arc groove disposed on the right side of the rotating column.

[0016] The longitudinal movement assembly includes a slidable longitudinal movement insert plate disposed in the rectangular rear cavity, a spindle sleeve hole disposed on the longitudinal movement insert plate and engaged with the spring spindle, a rear pressure plate disposed at the rear end of the longitudinal movement insert plate and passing through the rear opening, and a longitudinal movement compression spring wound around the spring spindle and located below the longitudinal movement insert plate. The front end of the longitudinal movement insert plate is also provided with a drive plug that is inserted into the inclined arc groove.

[0017] The plate-type lock head includes a lock head base and a lock head rotor;

[0018] The lock base includes a rectangular plug fixed to the lower end of the base plate and engaged with the plug groove, a left semi-circular groove extending from the right end of the rectangular plug to the left, a left arc-shaped groove on the left side of the left semi-circular groove, and an arc-shaped left widening groove on the outer edge of the left arc-shaped groove.

[0019] The lock rotor includes a left semicircular block that rotatably engages with the left semicircular groove, a left connecting plate located to the left of the left semicircular block and inserted into the left arc-shaped groove, a left arc-shaped plate located to the left of the left connecting plate and engaging with the left widening groove, and a lock compression spring located in the left widening groove and abutting against the left connecting plate.

[0020] The beneficial effects of this invention are:

[0021] The high-efficiency plate heat exchanger described in this case has a core plate assembly whose base plate pair can be quickly supported and fixed by auxiliary support members and main support members: first, fix the main support member, and then insert the base plate pair and plate pair lock head into the corresponding fastening lock body one by one in the order from bottom to top to complete the automatic fixing; finally, fasten and fix the auxiliary support members in the left, right and front positions of the base plate pair in sequence.

[0022] The high-efficiency plate heat exchanger described in this case introduces alkaline steam formed by low-temperature steam conditioning through a spray pipe. The alkaline steam, as a heat source, releases latent heat on the outer side of the base plate and then condenses, which, together with the heat release of flue gas, enhances the heat exchange efficiency. Furthermore, the alkaline condensate formed by condensation can neutralize the acidic solution formed by the flue gas, reducing corrosion. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of one embodiment of the high-efficiency plate heat exchanger.

[0025] Figure 2This is an isometric sectional view of one embodiment of the high-efficiency plate heat exchanger.

[0026] Figure 3 This is a schematic diagram of one embodiment of the core board assembly.

[0027] Figure 4 This is a schematic diagram of one embodiment of the base plate pair and plate pair lock head.

[0028] Figure 5 This is a schematic diagram of one embodiment of the main support member.

[0029] Figure 6 This is an isometric sectional view (partial) of one embodiment of the main support plate.

[0030] Figure 7 This is a schematic diagram of one embodiment of the secondary support member.

[0031] Figure 8 This is a schematic diagram of one embodiment of the latching lock body and plate-lock head.

[0032] Figure 9 This is an isometric sectional view of one embodiment of the latching lock body and plate-to-lock head.

[0033] Figure 10 This is an isometric sectional view of one embodiment of the locking body.

[0034] Figure 11 This is an isometric sectional view of one embodiment of the lock body housing.

[0035] Figure 12 This is a schematic diagram of one embodiment of the lock body rotor.

[0036] Figure 13 This is a schematic diagram of one embodiment of the rotating component and the longitudinal translation component.

[0037] Figure 14 This is a schematic diagram of one embodiment of the longitudinal movement component.

[0038] Figure 15 This is a schematic diagram of one embodiment of the plate and the lock head.

[0039] Figure 16 This is an isometric sectional view of one embodiment of the lock head base.

[0040] Figure 17 This is an isometric sectional view of one embodiment of the plate and the lock head.

[0041] Figure 18 This is a top view of one embodiment of the base plate.

[0042] Figure 19This is a schematic diagram of a heat exchange system.

[0043] The numbers in the diagram are as follows:

[0044] a1. alkaline vapor, a2. alkaline condensate, a3. neutral condensate, b. flue gas, c. air;

[0045] 9. Outer casing assembly; 91. Rectangular cavity; 92. Hot air inlet; 93. Hot air outlet; 94. Cold side exhaust pipe; 95. Cold side intake pipe; 96. Spray pipe; 97. Intake adjustment fan blade;

[0046] 8. Core board assembly;

[0047] 81. Base plate pair; 811. Sealing edge; 812. Flow pipe; 813. Cold side outlet; 814. Cold side inlet; 815. Condensate outlet;

[0048] 82. Secondary support component; 821. Secondary support plate; 822. Secondary spacer block;

[0049] 83. Main support component;

[0050] 1. Main support plate; 11. Vertical plate body; 12. Vertical insertion hole; 13. Right side hole; 14. Vertical plate bottom spring; 15. Sliding insertion rod; 16. Unlocking pressure plate;

[0051] 2. Lock body, 21. Lock body outer shell, 211. Rectangular shell, 212. Insertion groove, 213. Right semi-circular groove, 214. Right arc groove, 215. Right widening groove, 216. Circular inner cavity, 217. Rectangular rear cavity, 218. Rear opening, 219. Spring spindle, 22. Lock body rotor, 221. First rotor, 222. Right connecting plate, 223. Right arc plate, 224. Drive gear, 225. Lock body compression spring, 23. Rotating assembly, 231. Rotating column, 232. Driven gear, 233. Inclined arc groove, 24. Longitudinal movement assembly, 241. Longitudinal movement insert plate, 242. Spindle sleeve hole, 243. Rear pressure plate, 244. Longitudinal movement compression spring, 245. Drive plug;

[0052] 3. Plate to lock head, 31. Lock head base, 311. Rectangular insert, 312. Left semi-circular groove, 313. Left arc groove, 314. Left widening groove, 32. Lock head rotor, 321. Left semi-circular block, 322. Left connecting plate, 323. Left arc plate, 324. Lock head compression spring. Detailed Implementation

[0053] A high-efficiency plate heat exchanger includes a shell assembly 9 and a core plate assembly 8 disposed within the shell assembly 9.

[0054] The outer casing assembly 9 includes at least a rectangular cavity 91 that extends from left to right. The rectangular cavity 91 is provided with a hot air inlet 92 and a hot air outlet 93 on the left and right sides, respectively. The rear end face of the rectangular cavity 91 is provided with a cold side air outlet pipe 94 and a cold side air inlet pipe 95 that are connected to the rectangular cavity 91 on the left and right sides, respectively. The rear end of the hot air inlet 92 is provided with a spray pipe 96 for injecting alkaline steam.

[0055] The hot air inlet 92 is also equipped with at least three intake adjustment fan blades 97.

[0056] The core plate assembly 8 includes a base plate pair 81 arranged longitudinally at equal intervals. The base plate pair 81 is fixed to the front, left, and right sides by auxiliary support members 82. The base plate pair 81 is fixed to the rear by a main support member 83. The base plate pair 81 consists of two symmetrically distributed upper and lower plates. The four perimeters of the two plates are pressed together to form a sealing edge 811. The two plates maintain a vertical spacing to form an internal cavity. A pressing line is set within the internal cavity to form a flow channel 812. The left and right rear ends of the sealing edge 811 are respectively provided with a cold-side outlet 813 and a cold-side inlet 814 communicating with the flow channel 812. The rear ends of the cold-side outlet 813 and cold-side inlet 814 are respectively connected to a cold-side exhaust pipe 94 and a cold-side exhaust pipe 95. The front left and right ends of the base plate pair 81 each have a condensate outlet 815. The secondary support member 82 includes a secondary support plate 821 arranged longitudinally and secondary spacer blocks 822 equally spaced on the secondary support plate 821 and corresponding one-to-one with the base plate 81.

[0057] The main support member 83 includes a main support plate 1 arranged longitudinally, and a locking body 2 arranged at equal intervals on the main support plate 1 and corresponding to the base plate pair 81. The base plate pair 81 has a plate lock head 3 that is inserted and cooperates with the locking body 2 at the rear of the lower end face.

[0058] The main support plate 1 includes a longitudinal plate body 11, a longitudinal insertion hole 12 located on the right side of the longitudinal plate body 11, a right side hole 13 located on the right side of the longitudinal insertion hole 12, a longitudinal plate bottom spring 14 located in the longitudinal insertion hole 12, a sliding insertion rod 15 located on the longitudinal plate bottom spring 14, and an unlocking pressure plate 16 located at equal intervals on the right side of the sliding insertion rod 15 and corresponding to the locking body 2.

[0059] The locking body 2 includes a lock body shell 21, a lock body rotor 22, a rotating assembly 23, and a longitudinal movement assembly 24;

[0060] The lock body housing 21 includes a rectangular housing 211, a vertical insertion groove 212 located in front of the rectangular housing 211, a right semicircular groove 213 located on the right side of the vertical insertion groove 212, a right arc-shaped groove 214 located in the middle of the right semicircular groove 213, an arc-shaped right widening groove 215 located on the outer edge of the right arc-shaped groove 214, a circular inner cavity 216 located on the right side of the right widening groove 215 and connected thereto, a rectangular rear cavity 217 located at the rear end of the circular inner cavity 216, a rear opening 218 located at the rear end of the rectangular rear cavity 217, and a spring spindle 219 located in the rectangular rear cavity 218.

[0061] The lock body rotor 22 includes a semi-circular first rotor 221, a right connecting plate 222 disposed on the outer edge of the first rotor 221 and inserted into the right arc-shaped groove 214, a right arc-shaped plate 223 disposed on the outer edge of the right connecting plate 222 and inserted into the right widening groove 215, a drive gear 224 disposed on the outer edge of the right arc-shaped plate 223, and a lock body compression spring 225 disposed in the right widening groove 215;

[0062] The rotating assembly 23 includes a rotating column 231 rotatable in a circular inner cavity 216, a driven gear 232 located on the left side of the rotating column 231 and meshing with the driving gear 224, and an inclined arc groove 233 located on the right side of the rotating column 231.

[0063] The longitudinal movement assembly 24 includes a slidable longitudinal movement insert plate 241 disposed in the rectangular rear cavity 217, a spindle sleeve hole 242 disposed on the longitudinal movement insert plate 241 and engaged with the spring spindle 219, a rear pressure plate 243 disposed at the rear end of the longitudinal movement insert plate 241 and passing through the rear opening 218, and a longitudinal movement compression spring 244 wound around the spring spindle 219 and located below the longitudinal movement insert plate 241. The front end of the longitudinal movement insert plate 241 is also provided with a drive plug 245 that is inserted into the inclined arc groove 233.

[0064] The plate-type lock head 3 includes a lock head base 31 and a lock head rotor 32;

[0065] The lock base 31 includes a rectangular insert 311 fixed to the lower end of the base plate 81 and inserted into the longitudinal groove 212, a left semi-circular groove 312 extending from the right end of the rectangular insert 311 to the left, a left arc-shaped groove 313 on the left side of the left semi-circular groove 312, and an arc-shaped left widening groove 314 on the outer edge of the left arc-shaped groove 313.

[0066] The lock rotor 32 includes a left semicircular block 321 that rotatably engages with the left semicircular groove 312, a left connecting plate 322 located on the left side of the left semicircular block 321 and inserted into the left arc-shaped groove 313, a left arc-shaped plate 323 located on the left side of the left connecting plate 322 and engaged with the left widening groove 314, and a lock compression spring 324 located in the left widening groove 314 and abutting against the left connecting plate 322.

[0067] Since the base plate 81 is a hollow thin shell shape, and the thickness of its sealing edge 811 is significantly smaller than that of the flow pipe 812, if the gap between the sealing edges 811 is not supported and fixed, the flow pipes 812 will be squeezed against each other, resulting in a reduction in heat exchange efficiency.

[0068] The high-efficiency plate heat exchanger described in this case uses a main support member 83 and a secondary support member 82 to support and fix the longitudinally spaced base plates 81. The specific steps are as follows:

[0069] S1, fix the main support component 83 longitudinally;

[0070] S2, Fixing the base plate pair 81: Insert the base plate pair 81 and the plate pair lock head 3 from front to back into the latching lock body 2 at the bottom; Repeat the above steps to insert all the base plate pairs 81 into the corresponding latching lock bodies 2 from bottom to top;

[0071] S3, Fix the secondary support 82: Insert the secondary support 82 into the front, left and right sides of the base plate pair 81 respectively; the secondary support plate 821 is kept in a vertical position, and the secondary spacer block 822 is inserted into the lower part of the corresponding base plate pair 81 respectively.

[0072] As a further technical solution, S2 specifically refers to:

[0073] The plate-to-lock head 3 moves backward with the base plate 81 and is inserted into the insertion groove 212 of the lock body shell 21;

[0074] The lock rotor 32 is squeezed by the right edge of the insertion groove 212, causing the left semicircular block 321, the left connecting plate 322, and the left arc plate 323 to rotate counterclockwise against the damping of the lock compression spring 324 until the straight part of the left semicircular block 321 is aligned with the right side of the rectangular insertion block 311.

[0075] At the same time, the right rear end of the rectangular insert 311 synchronously presses the lock body rotor 22, causing the first rotor 221, the right connecting plate 222, the right arc plate 223, and the drive gear 224 to rotate clockwise over the damping of the lock body compression spring 225, until the straight part of the first rotor 221 is flush with the left semicircular block 321, and the first rotor 221 and the left semicircular block 321 are in a coaxial position; the lock head compression spring 324 drives the lock head rotor 32 to reset, and the lock body compression spring 225 drives the lock body rotor 22 to reset. Since the straight parts of the lock head rotor 32 and the lock body rotor 22 are tilted at this time, the plate is locked to the lock head 3 inside the locking body 2.

[0076] As a further technological solution, it also includes S4, a quick-release base plate for 81:

[0077] Pull out the secondary support components 82 one by one;

[0078] Press down on the sliding rod 15 and unlock the pressure plate 16 to make it move downward against the damping of the longitudinal plate bottom spring 14;

[0079] The unlocking pressure plate 16 presses down on the rear pressure plate 243 of the corresponding longitudinal moving component 24, causing the longitudinal moving component 24 to move downward as a whole; the drive plug 245 of the longitudinal moving component 24 acts on the inclined arc groove 233 of the rotating component 23, thereby driving the rotating component 23 to rotate; the driven gear 232 of the rotating component 23 acts on the drive gear 224 of the lock body rotor 22, thereby driving the lock body rotor 22 and the lock head rotor 32 to rotate until their flat surfaces are aligned with the insertion longitudinal groove 212; at this time, the base plate pair 81 can be pulled out from top to bottom and forward in sequence to quickly complete the disassembly.

[0080] According to the instruction manual Figure 19 Records:

[0081] This case also discloses a heat exchange method based on a high-efficiency plate heat exchanger, which introduces low-temperature steam (100℃~150℃) generated by the boiler (compared to flue gas b) as a second heat source. The specific method is as follows:

[0082] The low-temperature steam generated by the boiler at 100℃~150℃ is mixed with alkaline solution to form alkaline steam a1 at 100℃. This alkaline steam a enters the rectangular tube cavity 91 through the spray pipe 96 and the hot gas inlet 92 and is uniformly mixed with the flue gas b.

[0083] Flue gas b and alkaline steam a1 are cooled in a high-efficiency plate heat exchanger, and heat is released to air c through the base plate 81.

[0084] Among them, alkaline vapor a1 condenses and releases latent heat, undergoing a phase change to become alkaline condensate a2. The phase change process enhances heat exchange efficiency and neutralizes the acid to generate neutral condensate a3 (the flue gas contains S, Cl, etc. that are not fully combusted). Neutral condensate a3 and the cooled flue gas can be directly discharged.

[0085] Due to the combined effects of heat release from flue gas and the release of latent heat from the condensation of alkaline steam a1, the air temperature c at the cold side outlet pipe 94 can achieve a small heat exchange end difference with the flue gas b at the hot gas inlet 92. This heat exchange end difference is something that cannot be achieved in a physical process where there is no phase change between gas and gas.

[0086] It should be noted that the base plate 81 is also densely covered with outwardly protruding phase change bulges 4, and X-shaped non-phase change regions 5 are provided between the phase change bulges 4.

[0087] The phase change bulge 4 has a smooth, core-like surface, which can act as a condensation nucleus to accelerate the condensation and liquefaction of alkaline vapor a1. Because the smooth surface shape can accelerate the sliding of the condensate, it prevents the condensate from remaining in the phase change region 5 and forming a liquid film that hinders heat transfer, allowing the alkaline vapor a1 at the phase change bulge 4 to continuously condense and slide off.

[0088] The non-phase change region 5 can enhance airflow disturbance and improve the heat exchange efficiency of the non-phase change region.

Claims

1. A high-efficiency plate heat exchanger, comprising a shell assembly (9) and a core plate assembly (8) disposed within the shell assembly (9), characterized in that: The outer casing assembly (9) includes at least a rectangular cavity (91) that runs through the left and right sides. The rectangular cavity (91) is provided with a hot air inlet (92) and a hot air outlet (93) on the left and right sides, respectively. The rear end face of the rectangular cavity (91) is provided with a cold side air outlet pipe (94) and a cold side air inlet pipe (95) that are connected to the rectangular cavity (91). The core board assembly (8) includes a pair of base boards (81) arranged in a longitudinally equidistant array. The base plate is fixed to the front, left and right sides of (81) by auxiliary support members (82); The base plate is fixed to the rear of (81) by the main support member (83); The main support component (83) includes a main support plate (1) arranged along the longitudinal direction and a locking body (2) arranged at equal intervals on the main support plate (1) and corresponding one-to-one with the base plate (81). The base plate (81) has a plate lock head (3) that is inserted into and cooperates with the locking body (2) at the rear of the lower end face.

2. The high-efficiency plate heat exchanger according to claim 1, characterized in that: The locking body (2) includes a lock body shell (21), a lock body rotor (22), a rotating assembly (23), and a longitudinal moving assembly (24); The lock body housing (21) includes a rectangular housing (211), a vertical insertion groove (212) located in front of the rectangular housing (211), a right semicircular groove (213) located on the right side of the vertical insertion groove (212), a right arc-shaped groove (214) located in the middle of the right semicircular groove (213), an arc-shaped right widening groove (215) located on the outer edge of the right arc-shaped groove (214), a circular inner cavity (216) located on the right side of the right widening groove (215) and connected thereto, a rectangular rear cavity (217) located at the rear end of the circular inner cavity (216), a rear opening (218) located at the rear end of the rectangular rear cavity (217), and a spring spindle (219) located in the rectangular rear cavity (218). The lock body rotor (22) includes a semi-circular first rotor (221), a right connecting plate (222) disposed on the outer edge of the first rotor (221) and inserted into the right arc groove (214), a right arc plate (223) disposed on the outer edge of the right connecting plate (222) and inserted into the right widening groove (215), a drive gear (224) disposed on the outer edge of the right arc plate (223), and a lock body compression spring (225) disposed in the right widening groove (215). The rotating assembly (23) includes a rotating column (231) rotatable in a circular inner cavity (216), a driven gear (232) located on the left side of the rotating column (231) and meshing with the driving gear (224), and an inclined arc groove (233) located on the right side of the rotating column (231). The longitudinal movement assembly (24) includes a slidable longitudinal movement insert plate (241) disposed in the rectangular rear cavity (217), a spindle sleeve hole (242) disposed on the longitudinal movement insert plate (241) and engaged with the spring spindle (219), a rear pressure plate (243) disposed at the rear end of the longitudinal movement insert plate (241) and passing through the rear opening (218), and a longitudinal movement compression spring (244) wound around the spring spindle (219) and located below the longitudinal movement insert plate (241). The front end of the longitudinal movement insert plate (241) is also provided with a drive plug (245) that is inserted into the inclined arc groove (233). The plate-to-lock head (3) includes a lock head base (31) and a lock head rotor (32); The lock base (31) includes a rectangular plug (311) fixed to the lower end of the base plate pair (81) and plugged into the insertion groove (212), a left semi-circular groove (312) set from the right end of the rectangular plug (311) to the left, a left arc groove (313) set on the left side of the left semi-circular groove (312), and an arc-shaped left widening groove (314) set on the outer edge of the left arc groove (313). The lock rotor (32) includes a left semicircular block (321) that rotates with the left semicircular groove (312), a left connecting plate (322) located on the left side of the left semicircular block (321) and inserted into the left arc groove (313), a left arc plate (323) located on the left side of the left connecting plate (322) and engaged with the left widening groove (314), and a lock compression spring (324) located in the left widening groove (314) and abutting against the left connecting plate (322).

3. The high-efficiency plate heat exchanger according to claim 2, characterized in that: The base plate pair (81) is symmetrically distributed with two upper and lower plates. The two plates are pressed together to form a sealing edge (811). The two plates maintain a gap in the vertical direction to form an internal cavity. A pressing line is set in the internal cavity to form a flow pipeline (812). The sealing edge (811) is provided with a cold side outlet (813) and a cold side inlet (814) on the left and right sides respectively, which are connected to the flow pipeline (812). The rear ends of the cold side outlet (813) and the cold side inlet (814) are connected to the cold side air outlet pipe (94) and the cold side air inlet pipe (95) respectively.

4. A high-efficiency plate heat exchanger according to claim 3, characterized in that: The main support plate (1) includes a longitudinal plate body (11), a longitudinal insertion hole (12) located on the right side of the longitudinal plate body (11), a right side hole (13) located on the right side of the longitudinal insertion hole (12), a longitudinal plate bottom spring (14) located in the longitudinal insertion hole (12), a sliding insertion rod (15) located on the longitudinal plate bottom spring (14), and an unlocking pressure plate (16) located at equal intervals on the right side of the sliding insertion rod (15) and corresponding to the locking body (2).

5. A high-efficiency plate heat exchanger according to claim 4, characterized in that: The base plate (81) has a condensation outlet (815) on the left and right sides of its front end.

6. A high-efficiency plate heat exchanger according to claim 5, characterized in that: The secondary support member (82) includes a secondary support plate (821) arranged longitudinally and secondary spacer blocks (822) arranged at equal intervals on the secondary support plate (821) and corresponding one-to-one with the base plate (81).

7. A high-efficiency plate heat exchanger according to claim 6, characterized in that: The hot gas inlet (92) is provided with a spray pipe (96) for injecting alkaline steam at its rear end.

8. A high-efficiency plate heat exchanger according to claim 7, characterized in that: The hot air inlet (92) is also equipped with at least three intake adjustment fan blades (97).

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