A full premixed condensing combustion heat exchange device for steam boiler

Abstract

This invention discloses a fully premixed condensing combustion heat exchange device for a steam boiler. The burner, high-temperature heat exchange module, superheated heat exchange module, and condensing heat exchange module are sequentially arranged within an encapsulated housing along a path from the air inlet to the air outlet. The steam heat exchange pipeline includes a condensing heat exchange section, a fluid heat exchange section, a high-temperature heat exchange section, an external steam connection section, and a superheated steam section connected in sequence. The condensing heat exchange section is located within the condensing heat exchange module; the fluid heat exchange section and the superheated steam section are located within the superheated heat exchange module; and the high-temperature heat exchange section is located within the high-temperature heat exchange module. This invention integrates all heat exchange modules within the encapsulated housing, reducing overall weight and resulting in a compact structure. Furthermore, the final steam conversion point within the steam heat exchange pipeline is the superheated steam section at the end. Within this ambient temperature range, the metal heat exchange tubes exhibit stronger corrosion and crack resistance compared to contact with water vapor in a high-temperature environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam boiler, in particular to a full premix condensing combustion heat exchange device for steam boiler. BACKGROUND

[0002] Steam boiler refers to a boiler device for producing steam. The combustion temperature of the steam boiler is relatively high, so the exhaust flue gas is relatively high compared with the conventional boiler, which can reach above 200℃, and the latent heat of water vapor in the flue gas cannot be fully utilized. Therefore, the market has launched a condensing boiler, which reduces the exhaust gas temperature below the dew point temperature (or water dew point) of the flue gas through a heat utilization device to improve energy utilization efficiency.

[0003] At present, the structure of the condensing boiler on the market mainly has two forms of separated type and integral type. The former is to add a condensing section heat exchanger after the conventional boiler, and the condensing rate is low, and the overall thermal efficiency of the boiler is improved little; the latter is to design the conventional boiler and the condensing heat exchanger as an integral structure, which is generally composed of a single-channel integrated heat exchange coil winding, and the structure is complex, and the heat exchange coil is difficult to ensure the processing precision, the manufacturing process is complex, the whole is heavy, and the cost is high.

[0004] The combustion heat exchange device of the steam boiler is generally provided in an inverted vertical structure, and the air inlet, the burner, the heat exchanger and the air outlet are arranged from top to bottom. The heat exchange pipeline corresponding to the vertical combustion heat exchange device is arranged in a meandering coil from bottom to top, with the water inlet arranged at the lower part and the steam outlet arranged at the upper part, so that the unvaporized liquid water can be effectively filled in the heat exchange pipeline through the liquid filling effect.

[0005] During the forward movement of the liquid water in the heat exchange pipeline, the liquid water is converted into a semi-liquid and semi-water vapor mixed state, and then into water vapor which is sent out from the steam outlet. However, in the combustion heat exchange device with inverted vertical structure, the heat exchange pipeline is located in the high-temperature area close to the top of the heat exchanger and close to the burner, and the temperature of this area reaches 1000-1300℃. During operation, water vapor reflux phenomenon occurs. When the water vapor flows back to the high-temperature area, the heat exchange pipeline contacts with the water vapor in the high-temperature environment of 1000-1300℃, which is easy to cause corrosion or rupture, resulting in damage of the steam boiler and short service life. SUMMARY

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a full premix condensing combustion heat exchange device for steam boiler.

[0007] The technical solution adopted by an embodiment of the present application to solve its technical problem is: a full premix condensing combustion heat exchange device for steam boiler, comprising: an encapsulation base shell, a burner, a high-temperature heat exchange module, a superheated heat exchange module, a condensing heat exchange module and a steam heat exchange pipeline.

[0008] The packaging base shell is provided with an air inlet and an air outlet, and the burner, the high-temperature heat exchange module, the superheated heat exchange module and the condensation heat exchange module are sequentially arranged in the packaging base shell along the path from the air inlet to the air outlet;

[0009] The steam heat exchange pipeline comprises a condensation heat exchange section, a fluid heat exchange section, a high-temperature heat exchange section, an external steam connection section and a superheated steam section which are sequentially connected; the condensation heat exchange section is arranged in the condensation heat exchange module; the fluid heat exchange section and the superheated steam section are arranged in the superheated heat exchange module and are independent of each other; and the high-temperature heat exchange section is arranged in the high-temperature heat exchange module.

[0010] Optionally, the external steam connection section is provided with a pressure variation member; the pressure variation member can divide the external steam connection section into two steam channels with different pressures.

[0011] Optionally, the pressure variation member is a pressure adjusting piece fixed in the external steam connection section; the outer edge of the pressure adjusting piece is fixed in the external steam connection section; and the middle part of the pressure adjusting piece is provided with a converging hole, and the diameter of the converging hole is smaller than the diameter of the external steam connection section.

[0012] Optionally, the superheated heat exchange module comprises a fluid superheated area and a steam superheated area; the fluid heat exchange section is arranged in the fluid superheated area, and the superheated steam section is arranged in the steam superheated area; the fluid superheated area is arranged close to the high-temperature heat exchange module, and the steam superheated area is arranged on the side of the fluid superheated area away from the high-temperature heat exchange module.

[0013] Optionally, the condensation heat exchange module comprises a plurality of condensation heat exchange pipes, two condensation clamping plates, a condensation rotary connection assembly, a condensation input interface and a condensation output interface.

[0014] The two condensation clamping plates are arranged at intervals and form a condensation heat exchange area; the two ends of each of the plurality of condensation heat exchange pipes are respectively mounted on one of the condensation clamping plates; adjacent two condensation heat exchange pipes are connected through the condensation rotary connection assembly and form a continuous condensation heat exchange section; and the condensation heat exchange section is connected with the condensation input interface and the condensation output interface.

[0015] Optionally, the plurality of condensation heat exchange pipes are arranged in a grid structure and are arranged at intervals in a plurality of horizontal rows and a plurality of vertical columns.

[0016] The condensation rotary connecting assembly is provided with a condensation horizontal communication assembly and a condensation vertical communication assembly; the condensation horizontal communication assembly can make two adjacent condensation heat exchange pipes in the same horizontal row communicate at one end of the same condensation clamp plate; the condensation vertical communication assembly can make two adjacent condensation heat exchange pipes in the same vertical column communicate at one end of the same condensation clamp plate.

[0017] Optionally, the superheating heat exchange module comprises a plurality of superheating heat exchange pipes, two superheating rotary connecting assemblies, a fluid superheating input interface, a fluid superheating output interface, a steam superheating input interface and a steam superheating output interface.

[0018] The two superheating rotary connecting assemblies are arranged at intervals, and two ends of the plurality of superheating heat exchange pipes are respectively mounted on one superheating rotary connecting assembly; the superheating rotary connecting assembly is provided with a plurality of superheating rotary connecting cavities, two adjacent superheating heat exchange pipes are communicated through the superheating rotary connecting cavities, and the fluid heat exchange section and the superheated steam section which are independent and continuous can be formed; the fluid heat exchange section is connected with the fluid superheating input interface and the fluid superheating output interface; the superheated steam section is connected with the steam superheating input interface and the steam superheating output interface.

[0019] Optionally, the plurality of superheating heat exchange pipes are arranged in a grid structure and are arranged at intervals in a plurality of horizontal rows and a plurality of vertical columns.

[0020] The superheating rotary connecting assembly comprises a superheating connecting seat, a superheating flow guide plate and a superheating blind plate; the superheating connecting seat is arranged in a vertical extension, and a plurality of superheating rotary connecting cavities are vertically arranged, and the superheating heat exchange pipe can extend into the superheating rotary connecting cavity; the superheating connecting seat is provided with a horizontal baffle rib which can block the communication between two superheating rotary connecting cavities in the vertical direction.

[0021] The plurality of superheating connecting seats are arranged side by side, and the superheating flow guide plate or the superheating blind plate is arranged between two adjacent superheating connecting seats; the superheating blind plate can block the communication between two superheating rotary connecting cavities in the horizontal direction; the superheating flow guide plate is provided with a superheating horizontal flow guide hole which can make two superheating rotary connecting cavities in the horizontal direction communicate.

[0022] Optionally, the high-temperature heat exchange module comprises a plurality of high-temperature heat exchange pipes, two high-temperature clamp plate assemblies, a high-temperature rotary connecting assembly, a high-temperature input interface and a high-temperature output interface.

[0023] The two high-temperature clamp plate assemblies are arranged at intervals, and two ends of the plurality of high-temperature heat exchange pipes can be respectively mounted on one high-temperature clamp plate assembly; two adjacent high-temperature heat exchange pipes are communicated through the high-temperature rotary connecting assembly, and a continuous high-temperature heat exchange section is formed; the high-temperature heat exchange section is connected with the high-temperature input interface and the high-temperature output interface.

[0024] Optionally, the steam heat exchange pipeline is a combination of one or more of a flat tube, a round tube, a rectangular tube or a finned tube.

[0025] The beneficial effects of the present application are as follows: the combustion heat exchange device has a combustion heat exchange chamber formed by an encapsulation base shell, the encapsulation base shell is provided with an air inlet and an air outlet, and the combustor, the high-temperature heat exchange module, the superheated heat exchange module and the condensation heat exchange module are sequentially arranged in the encapsulation base shell along the path from the air inlet to the air outlet. The flame generated by the combustion of the combustor forms a heat exchange area with a gradually decreasing temperature interval in the direction of the air outlet. Most of the heat generated by the high-temperature flame is absorbed by the high-temperature heat exchange module and the superheated heat exchange module close to the combustor. Then, the low-temperature flue gas immediately enters the condensation heat exchange module for condensation and pre-mixed heating. The overall combustion heat exchange device is coherent and compact, which facilitates the combination and integration of the combustor, the high-temperature heat exchange module, the superheated heat exchange module and the condensation heat exchange module in the encapsulation base shell, reduces the overall weight, and effectively reduces the production cost.

[0026] In addition, the steam heat exchange pipeline includes a condensation heat exchange section, a fluid heat exchange section, a high-temperature heat exchange section, an external steam connection section and a superheated steam section in sequence. The condensation heat exchange section uses low-temperature flue gas for pre-mixed heat exchange at the condensation heat exchange module to preliminarily heat the internal liquid. Then, the liquid enters the fluid heat exchange section, which is arranged in the superheated heat exchange module. The temperature in this area reaches 500-700 DEG C, which can further heat exchange the fluid to improve the overall temperature of the liquid. Then, the liquid enters the high-temperature heat exchange section, which is arranged in the high-temperature heat exchange module close to the combustor. The temperature in this area reaches 1000-1300 DEG C, which is the main heat exchange area. In the high-temperature heat exchange section, the liquid can be mostly converted into steam or a semi-liquid and semi-steam mixed form. Then, the liquid flows through the external steam connection section to the superheated steam section, where it is heated again to be completely converted into steam, which is then sent out of the combustion heat exchange device. In the present application, the final conversion site of the steam in the steam heat exchange pipeline is the superheated steam section at the end. The temperature in the corresponding superheated heat exchange module area is in the range of 500-700 DEG C. The metal heat exchange pipe has stronger corrosion and rupture resistance in this temperature range compared to the high-temperature environment of the high-temperature heat exchange module in contact with water vapor, thereby effectively reducing the damage of the combustion heat exchange device and improving the service life.

[0027] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0029] Figure 1 Structure diagram of full premixed condensing combustion heat exchange device for steam boiler according to one embodiment of the present application;

[0030] Figure 2 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application; Figure 1 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0031] Figure 3 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application; Figure 1 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0032] Figure 4 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application; Figure 3 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0033] Figure 5 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application; Figure 1 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0034] Figure 6 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application; Figure 5 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0035] Figure 7 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0036] Figure 8 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0037] Figure 9 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0038] Figure 10 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application;

[0039] Figure 11 Structure diagram of full premixed condensing combustion heat exchange device according to one embodiment of the present application.

[0040] Main component symbol explanation:

[0041] 100, package base shell; 200, burner; 300, high-temperature heat exchange module; 310, high-temperature heat exchange pipe; 320, high-temperature clamp plate assembly; 330, high-temperature rotary connection assembly; 331, high-temperature rotary connection cavity; 332, high-temperature rotary shell seat; 333, high-temperature sealing plate; 340, high-temperature input interface; 350, high-temperature output interface; 400, superheating heat exchange module; 410, fluid superheating zone; 420, steam superheating zone; 430, superheating heat exchange pipe; 440, superheating rotary connection assembly; 441, superheating rotary connection cavity; 442, superheating connection seat; 443, superheating flow guide plate; 444, superheating blind plate; 445, superheating transverse flow guide hole; 446, horizontal baffle rib; 450, fluid superheating input interface; 460, fluid superheating output interface; 470, steam superheating input interface; 480, steam superheating output interface; 500, condensation heat exchange module; 510, condensation heat exchange pipe; 520, condensation clamp plate; 530, condensation rotary connection assembly; 531, condensation transverse communication assembly; 532, condensation vertical communication assembly; 533, condensation connection shell wall; 534, condensation sealing plate; 535, double-way communication return cavity; 536, condensation pipe insertion interface; 540, condensation input interface; 550, condensation output interface; 600, steam heat exchange pipe; 610, condensation heat exchange section; 620, fluid heat exchange section; 630, high-temperature heat exchange section; 640, external steam connection section; 650, superheating steam section; 700, pressure varying member; 710, pressure adjusting piece; 720, converging hole. DETAILED DESCRIPTION

[0042] This part will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the drawings, which serve to supplement the description in the text part of the specification and enable a person to visually and intuitively understand each technical feature and the overall technical solution of the present application, but cannot be understood as a limitation on the protection scope of the present application.

[0043] In the description of the present application, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0044] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0045] In the present application, unless otherwise explicitly defined, the words such as "arrange", "mount", "connect" should be understood in a broad sense, for example, it can be directly connected, or indirectly connected through an intermediate medium; it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected; it can be the internal communication of two elements or the interaction relationship of two elements. The person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0046] Embodiment

[0047] Reference Figures 1 to 11 The present application provides a full premix condensing combustion heat exchange device for steam boiler, comprising: an encapsulation base shell 100, a burner 200, a high-temperature heat exchange module 300, a superheated heat exchange module 400, a condensing heat exchange module 500 and a steam heat exchange pipeline 600.

[0048] The encapsulation base shell 100 is provided with an air inlet and an air outlet, and the burner 200, the high-temperature heat exchange module 300, the superheated heat exchange module 400 and the condensing heat exchange module 500 are sequentially arranged in the encapsulation base shell 100 along the path from the air inlet to the air outlet.

[0049] The steam heat exchange pipeline 600 comprises a condensing heat exchange section 610, a fluid heat exchange section 620, a high-temperature heat exchange section 630, an external steam connection section 640 and a superheated steam section 650 which are sequentially connected; the condensing heat exchange section 610 is arranged in the condensing heat exchange module 500; the fluid heat exchange section 620 and the superheated steam section 650 are arranged in the superheated heat exchange module 400 and are independent of each other; and the high-temperature heat exchange section 630 is arranged in the high-temperature heat exchange module 300.

[0050] In the present application, the combustion heat exchange device is surrounded by the encapsulation base shell 100 to form a combustion heat exchange chamber, the encapsulation base shell 100 is provided with an air inlet and an air outlet, and the burner 200, the high-temperature heat exchange module 300, the superheated heat exchange module 400 and the condensing heat exchange module 500 are sequentially arranged in the encapsulation base shell 100 along the path from the air inlet to the air outlet. The flame generated by the combustion of the burner 200 forms a heat exchange area with gradually decreasing temperature intervals in the direction of the air outlet, and most of the heat generated by the high-temperature flame is absorbed by the high-temperature heat exchange module 300 and the superheated heat exchange module 400 close to the burner 200, and then the low-temperature flue gas immediately enters the condensing heat exchange module 500 for condensing premix heating. The overall combustion heat exchange device is coherent and compact, which facilitates the combination and integration of the burner 200, the high-temperature heat exchange module 300, the superheated heat exchange module 400 and the condensing heat exchange module 500 in the encapsulation base shell 100, reduces the overall weight, and effectively reduces the production cost.

[0051] In addition, the steam heat exchange pipeline 600 comprises, in sequence, the condensation heat exchange section 610, the fluid heat exchange section 620, the high-temperature heat exchange section 630, the external steam connection section 640 and the superheated steam section 650; the condensation heat exchange section 610 utilizes low-temperature flue gas at the condensation heat exchange module 500 to perform premixed heat exchange, so as to preliminarily heat the internal liquid; then, the liquid enters the fluid heat exchange section 620, which is arranged at the superheated heat exchange module 400; the temperature of this region reaches 500-700 DEG C, so that the liquid can be further heat exchanged to increase the overall temperature of the liquid; then, the liquid enters the high-temperature heat exchange section 630, which is arranged at the high-temperature heat exchange module 300; the high-temperature heat exchange module 300 is arranged close to the burner 200; the temperature of this region reaches 1000-1300 DEG C, which is the working region for main heat exchange; in the high-temperature heat exchange section 630, the liquid can be mostly converted into steam or a semi-liquid and semi-steam mixed form; then, the liquid flows through the external steam connection section 640 to the superheated steam section 650, where the liquid is heat-absorbed again to be completely converted into steam, so as to be sent out of the combustion heat exchange device. In the present application, the final conversion position of the steam in the steam heat exchange pipeline 600 is the superheated steam section 650 at the end; the temperature of the corresponding region of the superheated heat exchange module 400 is in the range of 500-700 DEG C; compared with the high-temperature environment of the high-temperature heat exchange module 300 and the contact of the water vapor, the metal heat exchange pipe has stronger corrosion resistance and rupture resistance in this temperature range, so as to effectively reduce the damage of the combustion heat exchange device and increase the service life.

[0052] In the present embodiment, the external steam connection section 640 is provided with a pressure variation member 700; the pressure variation member 700 can divide the external steam connection section 640 into two steam channels with different pressures. The pressure of the liquid water or semi-liquid and semi-steam mixed form in the steam heat exchange pipeline 600 is greater than that of the gaseous steam, so that when the external steam connection section 640 is divided by the pressure variation member 700 into two steam channels with different pressures at the front and back ends, the gaseous steam diffuses towards the steam channel with relatively smaller pressure. The steam channel with greater pressure is located at the side close to the high-temperature heat exchange section 630, and the steam channel with smaller pressure is located at the side close to the superheated steam section 650, so that the gaseous steam diffuses towards the superheated steam section 650, and the steam backflow from the superheated steam section 650 to the high-temperature heat exchange section is effectively prevented, so as to avoid the corrosion of the high-temperature heat exchange section due to the backflow steam.

[0053] In the present embodiment, the air inlet is arranged at the top of the packaging base shell 100, and the air outlet is arranged at the bottom of the packaging base shell 100; the combustion heat exchange device is arranged in a vertical inverted structure.

[0054] In some embodiments, a heat insulation layer structure is arranged in the packaging shell, so that the heat generated by the burner 200 can be gathered in the combustion heat exchange chamber in the packaging shell, so as to avoid overflow and improve the capacity utilization.

[0055] In some embodiments, the pressure changing member 700 is a detachable adjustable flow regulator. The adjustable flow regulator is a direct application of prior art products, which will not be described in detail here. Through the flow regulator, the manufacturer can change the flow rate of the semi-liquid and semi-vapor near the superheated steam section 650 after passing through the flow regulator, thereby changing the pressure on that side to match different fuels and usage environments for adjustment.

[0056] In some embodiments, in order to avoid user misuse, the pressure changing member 700 is a pressure adjusting sheet 710 fixed in the external steam connection section 640.

[0057] Please refer to Figure 8 , specifically, the outer edge of the pressure adjusting sheet 710 is fixed in the external steam connection section 640; the middle part of the pressure adjusting sheet 710 is provided with a converging hole 720, and the diameter of the converging hole 720 is smaller than the diameter of the external steam connection section 640. According to the Venturi effect, the fluid flowing in the external steam connection section 640 will increase in flow rate when passing through the reduced flow cross section of the converging hole 720, and the flow rate is inversely proportional to the flow cross section. According to Bernoulli's law, the increase in flow rate is accompanied by a decrease in fluid pressure, so on the side of the pressure adjusting sheet 710 close to the superheated steam section 650, the pressure will be reduced, and the gaseous steam will flow towards the side of the external steam connection section 640 close to the superheated steam section 650, which is relatively small in pressure, effectively preventing steam from flowing back to the high-temperature heat exchange section.

[0058] In this embodiment, the superheated heat exchange module 400 includes a fluid superheating area 410 and a steam superheating area 420; the fluid heat exchange section 620 is arranged in the fluid superheating area 410, and the superheated steam section 650 is arranged in the steam superheating area 420; the fluid superheating area 410 is arranged close to the high-temperature heat exchange module 300, and the steam superheating area 420 is arranged on the side of the fluid superheating area 410 away from the high-temperature heat exchange module 300. Since the steam superheating area 420 is relatively farther away from the burner 200 than the fluid superheating area 410, the temperature at which the steam is mainly formed and filled in the superheated steam section 650 is relatively lower, so the metal heat exchange pipes of the superheated steam section 650 are relatively less likely to be corroded or ruptured, thereby effectively reducing the damage of the combustion heat exchange device and improving the service life.

[0059] Please refer to Figure 9In some embodiments, the condensation heat exchange module 500 comprises a plurality of condensation heat exchange pipes 510, two condensation clamping plates 520, a condensation rotary connection assembly 530, a condensation input interface 540, and a condensation output interface 550. The two condensation clamping plates 520 are arranged at intervals and form condensation heat exchange zones. The two ends of the plurality of condensation heat exchange pipes 510 are respectively mounted on one condensation clamping plate 520. Adjacent two condensation heat exchange pipes 510 are connected through the condensation rotary connection assembly 530 and form a continuous condensation heat exchange section 610. The condensation heat exchange section 610 is connected with the condensation input interface 540 and the condensation output interface 550. The condensation clamping plate 520, the condensation heat exchange pipe 510, and the rotary connection assembly arranged in a split body form the condensation heat exchange module 500 which is continuous with the high-temperature heat exchange module 300 and the superheated heat exchange module 400. The structure is simple and compact, the manufacturing process is simple and easy to process, and the production cost is effectively reduced.

[0060] Specifically, the plurality of condensation heat exchange pipes 510 are arranged in a grid structure and arranged at intervals in a plurality of horizontal rows and a plurality of vertical columns. The plurality of condensation heat exchange pipes 510 are fixed by the two condensation clamping plates 520 to form a grid arrangement structure, so that the whole has a rectangular structure and provides space for the high-temperature flue gas to flow through, ensuring the space for heat exchange with the condensation heat exchange pipes 510. The overall structure is simple and compact, and is easy to form a continuous whole with the combustion device.

[0061] Further, the condensation rotary connection assembly 530 is provided with a condensation horizontal communication assembly 531 and a condensation vertical communication assembly 532. The condensation horizontal communication assembly 531 can make the adjacent two condensation heat exchange pipes 510 in the same horizontal row communicate at one end of the same condensation clamping plate 520. The condensation vertical communication assembly 532 can make the adjacent two condensation heat exchange pipes 510 in the same vertical column communicate at one end of the same condensation clamping plate 520. By using the condensation horizontal communication assembly 531 and the condensation vertical communication assembly 532, the plurality of condensation heat exchange pipes 510 arranged in a longitudinal and horizontal grid can be connected two by two to form a complete one-way continuous heat exchange channel.

[0062] In some embodiments, the condensation rotary connection assembly 530 comprises a condensation connection shell wall 533 and a condensation sealing plate 534. The connection shell wall and the sealing plate form a double-way communication return cavity 535. One end of the condensation heat exchange pipe 510 can extend into the double-way communication return cavity 535.

[0063] Specifically, the condensation connection shell wall 533 is provided with a condensation pipe insertion port 536. One end of the condensation heat exchange pipe 510 can be connected to the condensation pipe insertion port 536. For the horizontal communication assembly, the condensation pipe insertion port 536 is arranged at intervals in the vertical direction. For the vertical communication assembly, the condensation pipe insertion port 536 is arranged at intervals in the vertical direction.

[0064] Please refer to Figure 10In some embodiments, the superheating heat exchange module 400 comprises a plurality of superheating heat exchange pipes 430, two superheating rotary connection assemblies 440, a fluid superheating input interface 450, a fluid superheating output interface 460, a steam superheating input interface 470, and a steam superheating output interface 480. The two superheating rotary connection assemblies 440 are arranged at intervals, and the two ends of the plurality of superheating heat exchange pipes 430 are respectively mounted on one superheating rotary connection assembly 440. The superheating rotary connection assembly 440 is provided with a plurality of superheating rotary connection cavities 441, and the adjacent two superheating heat exchange pipes 430 are connected through the superheating rotary connection cavities 441 to form a fluid heat exchange section 620 and a superheated steam section 650 which are independent and continuous. The fluid heat exchange section 620 is connected with the fluid superheating input interface 450 and the fluid superheating output interface 460. The superheated steam section 650 is connected with the steam superheating input interface 470 and the steam superheating output interface 480. Similar to the condensing heat exchange module 500, the superheating heat exchange module 400 can form a one-way flow and independent fluid heat exchange section 620 and superheated steam section 650 through the two superheating rotary connection assemblies 440, and can be used in combination with the high-temperature heat exchange module 300 and the condensing heat exchange module 500, and has a simple and compact structure.

[0065] In some embodiments, similar to the condensing heat exchange module 500, the plurality of superheating heat exchange pipes 430 are arranged in a grid structure and are arranged at intervals in a plurality of horizontal rows and a plurality of vertical columns. Even if the overall structure is a rectangular cuboid, it still provides space for the high-temperature flue gas to flow through, ensuring the space for contact and heat exchange with the superheating heat exchange pipes 430.

[0066] In some embodiments, the superheating rotary connection assembly 440 comprises a superheating connection seat 442, a superheating flow guide plate 443, and a superheating blind plate 444. The superheating connection seat 442 is arranged in a vertical extension and is vertically provided with a plurality of superheating rotary connection cavities 441, and the superheating heat exchange pipe 430 can extend into the superheating rotary connection cavity 441. The superheating connection seat 442 is provided with a horizontal baffle rib 446 to block the communication between the two superheating rotary connection cavities 441 in the vertical direction. A plurality of superheating connection seats 442 are arranged side by side, and a superheating flow guide plate 443 or a superheating blind plate 444 is arranged between the adjacent two superheating connection seats 442. The superheating blind plate 444 can block the communication between the two superheating rotary connection cavities 441 in the horizontal direction. The superheating flow guide plate 443 is provided with a superheating horizontal flow guide hole 445 to enable the communication between the two superheating rotary connection cavities 441 in the horizontal direction. By using the blind plate which has a horizontal blocking effect, the superheating flow guide plate 443 which has a horizontal guiding effect, and the horizontal baffle rib 446 which has a vertical blocking effect, the communication between the two superheating rotary connection cavities 441 can only be in the horizontal direction or in the vertical direction, thereby forming a fluid heat exchange section 620 or a superheated steam section 650 which has a reciprocating detour.

[0067] Please refer to Figure 11In some embodiments, the high-temperature heat exchange module 300 comprises several high-temperature heat exchange pipes 310, two high-temperature clamp plate assemblies 320, a high-temperature rotary connection assembly 330, a high-temperature input interface 340, and a high-temperature output interface 350. The two high-temperature clamp plate assemblies 320 are arranged at intervals, and the two ends of the several high-temperature heat exchange pipes 310 can be respectively mounted on one high-temperature clamp plate assembly 320. The adjacent two high-temperature heat exchange pipes 310 are connected through the high-temperature rotary connection assembly 330 and form a continuous high-temperature heat exchange section 630. The high-temperature heat exchange section 630 is connected with the high-temperature input interface 340 and the high-temperature output interface 350. The high-temperature heat exchange module 300 in the form of a cuboid structure is formed by the high-temperature clamp plate assemblies 320, the high-temperature heat exchange pipes 310, and the high-temperature rotary connection assembly 330 arranged in a split manner, which can be connected with the burner 200 and the superheating heat exchange module 400. The structure is simple and compact, the manufacturing process is simple, and the processing is convenient.

[0068] Specifically, the high-temperature rotary connection assembly 330 comprises a high-temperature rotary shell seat 332 and a high-temperature sealing plate 333. The high-temperature rotary shell seat 332 and the high-temperature sealing plate 333 form several high-temperature rotary connection cavities 331. The high-temperature rotary connection cavities 331 can connect two high-temperature heat exchange pipes 310.

[0069] Preferably, the high-temperature heat exchange module 300, the superheating heat exchange module 400, and the condensing heat exchange module 500 are all combined into a cuboid structure by several parts arranged in a split manner, so as to be conveniently arranged in the packaging base shell 100 in a vertical inverted integrated manner with the burner 200.

[0070] In this embodiment, according to the arrangement structure of the combustion heat exchange device and the product positioning, the steam heat exchange pipe 600 is a combination of one or more of a flat tube, a circular tube, a rectangular tube, or a finned tube.

[0071] Of course, the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications and replacements are all included in the scope defined by the claims of the present application.

Claims

1. A full premix condensing combustion heat exchanging device for steam boiler, characterized by, The utility model relates to a high-temperature steam generator, which comprises a packaging base shell (100), a burner (200), a high-temperature heat exchange module (300), a superheated heat exchange module (400), a condensation heat exchange module (500) and a steam heat exchange pipeline (600). The packaging base shell (100) is provided with an air inlet and an air outlet, and the burner (200), the high-temperature heat exchange module (300), the superheated heat exchange module (400) and the condensation heat exchange module (500) are sequentially arranged in the packaging base shell (100) along the path from the air inlet to the air outlet. The steam heat exchange pipeline (600) comprises a condensation heat exchange section (610), a fluid heat exchange section (620), a high-temperature heat exchange section (630), an external steam connection section (640) and a superheated steam section (650) which are sequentially connected. The condensation heat exchange section (610) is arranged in the condensation heat exchange module (500), the fluid heat exchange section (620) and the superheated steam section (650) are arranged in the superheated heat exchange module (400) and are independent of each other, and the high-temperature heat exchange section (630) is arranged in the high-temperature heat exchange module (300). The external steam connection section (640) is provided with a pressure changing member (700), the pressure changing member (700) is a pressure adjusting piece (710) fixed in the external steam connection section (640), the outer edge of the pressure adjusting piece (710) is fixed in the external steam connection section (640), the middle part of the pressure adjusting piece (710) is provided with a converging hole (720), and the diameter of the converging hole (720) is smaller than the diameter of the external steam connection section (640). The superheated heat exchange module (400) comprises a plurality of superheated heat exchange pipes (430), two superheated rotary connection assemblies (440), a fluid superheated input interface (450), a fluid superheated output interface (460), a steam superheated input interface (470) and a steam superheated output interface (480). The two superheated rotary connection assemblies (440) are arranged at intervals, and the two ends of the plurality of superheated heat exchange pipes (430) are respectively installed in one superheated rotary connection assembly (440); the superheated rotary connection assembly (440) is provided with a plurality of superheated rotary connection cavities (441), adjacent two superheated heat exchange pipes (430) are connected through the superheated rotary connection cavities (441), and the fluid heat exchange section (620) and the superheated steam section (650) which are independent of each other and are connected in sequence can be formed; the fluid superheated input interface (450) and the fluid superheated output interface (460) are connected to the fluid heat exchange section (620); and the steam superheated input interface (470) and the steam superheated output interface (480) are connected to the superheated steam section (650). The plurality of superheated heat exchange pipes (430) are arranged in a grid structure and are arranged at intervals in a plurality of horizontal rows and a plurality of vertical columns. ​ The superheating rotary connecting assembly (440) comprises a superheating connecting seat (442), a superheating guide plate (443) and a superheating blind plate (444); the superheating connecting seat (442) is vertically arranged and vertically provided with a plurality of superheating rotary connecting cavities (441), and the superheating heat exchange pipe (430) can extend into the superheating rotary connecting cavity (441); the superheating connecting seat (442) is provided with a horizontal baffle rib (446) which can block the communication between two superheating rotary connecting cavities (441) vertically. A plurality of superheating connecting seats (442) are arranged side by side, and the superheating guide plate (443) or the superheating blind plate (444) is arranged between two adjacent superheating connecting seats (442); the superheating blind plate (444) can block the communication between two superheating rotary connecting cavities (441) horizontally; the superheating guide plate (443) is provided with a superheating horizontal guide hole (445) which can make two superheating rotary connecting cavities (441) communicate horizontally.

2. The fully premix condensing combustion heat exchanging device for steam boiler as claimed in claim 1 wherein: The superheating heat exchange module (400) comprises a fluid superheating area (410) and a steam superheating area (420); the fluid heat exchange section (620) is arranged in the fluid superheating area (410), and the superheated steam section (650) is arranged in the steam superheating area (420); the fluid superheating area (410) is arranged close to the high-temperature heat exchange module (300), and the steam superheating area (420) is arranged on the side of the fluid superheating area (410) away from the high-temperature heat exchange module (300).

3. The fully premix condensing combustion heat exchanging device for steam boiler as claimed in claim 1 wherein: The condensation heat exchange module (500) comprises a plurality of condensation heat exchange pipes (510), two condensation clamping plates (520), a condensation rotary connecting assembly (530), a condensation input interface (540) and a condensation output interface (550); The two condensation clamping plates (520) are arranged at intervals and form a condensation heat exchange area; two ends of each of the plurality of condensation heat exchange pipes (510) are respectively arranged on one condensation clamping plate (520); two adjacent condensation heat exchange pipes (510) are connected through the condensation rotary connecting assembly (530) and form a continuous condensation heat exchange section (610); the condensation heat exchange section (610) is connected with the condensation input interface (540) and the condensation output interface (550).

4. The fully premix condensing combustion heat exchanging device for steam boiler as claimed in claim 3 wherein: The plurality of condensation heat exchange pipes (510) are arranged in a grid structure and arranged at intervals in a plurality of horizontal rows and a plurality of vertical columns; The condensation rotary connecting assembly (530) comprises a condensation horizontal communication assembly (531) and a condensation vertical communication assembly (532); the condensation horizontal communication assembly (531) can make two adjacent condensation heat exchange pipes (510) in the same horizontal row communicate at one end of the same condensation clamping plate (520); and the condensation vertical communication assembly (532) can make two adjacent condensation heat exchange pipes (510) in the same vertical column communicate at one end of the same condensation clamping plate (520).

5. A fully premix condensing combustion heat exchanger for steam boiler as claimed in claim 1 wherein: The high-temperature heat exchange module (300) comprises a plurality of high-temperature heat exchange pipes (310), two high-temperature clamping plate assemblies (320), a high-temperature rotary connecting assembly (330), a high-temperature input interface (340) and a high-temperature output interface (350). Two said high-temperature clamp plate assemblies (320) are arranged at intervals, and two ends of a plurality of high-temperature heat exchange pipes (310) can be respectively installed in one said high-temperature clamp plate assembly (320); two adjacent high-temperature heat exchange pipes (310) are communicated through a high-temperature rotary connection assembly (330) and form a continuous said high-temperature heat exchange section (630); the high-temperature heat exchange section (630) is connected with the high-temperature input interface (340) and the high-temperature output interface (350).

6. The fully premix condensing combustion heat exchanging device for steam boiler as claimed in claim 1 wherein: The steam heat exchange pipe line (600) is a combination of one or more of a flat tube, a round tube, a rectangular tube or a finned tube.

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