CN115095847A - Full-premixing condensation combustion heat exchange device for steam boiler - Google Patents

Abstract

The invention discloses a full-premixing condensation combustion heat exchange device for a steam boiler, wherein a combustor, a high-temperature heat exchange module, an overheating heat exchange module and a condensation heat exchange module are sequentially arranged in a packaging base shell on a path from an air inlet to an air outlet; 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 connecting section and a superheated steam section which are sequentially communicated; the condensation heat exchange section is arranged on the condensation heat exchange module; the fluid heat exchange section and the superheated steam section are arranged on the superheated heat exchange module; the high-temperature heat exchange section is arranged on the high-temperature heat exchange module. According to the invention, each heat exchange module is integrally arranged in the packaging base shell, so that the overall weight is reduced, and the structure is compact; and moreover, the final conversion part of the steam in the steam heat exchange pipeline is a tail superheated steam section, and the metal heat exchange pipe is in contact with the steam in a high-temperature environment in the environment temperature range, so that the metal heat exchange pipe has stronger corrosion resistance and rupture resistance.

Description

Full-premixing condensation combustion heat exchange device for steam boiler

Technical Field

The invention relates to the technical field of steam boilers, in particular to a full-premixing condensing combustion heat exchange device for a steam boiler.

Background

Steam boiler refers to a boiler plant that produces steam. The combustion temperature of the steam boiler is higher, so that the discharged flue gas is higher than that of a conventional boiler and generally can reach more than 200 ℃, and the latent heat of the steam in the flue gas cannot be fully utilized. Therefore, condensing boilers have been introduced in the market, which lower the temperature of exhaust gas below the dew point temperature of the exhaust gas (or the water dew point) by a heat energy utilization device to improve the energy utilization efficiency.

The structure forms of the condensing boiler on the market at present mainly comprise a separation form and an integral form. The former is that a condensing section heat exchanger is additionally arranged behind a conventional boiler, so that the condensing rate is low, and the integral heat efficiency of the boiler is improved slightly; the latter designs conventional boiler and condensation heat exchanger as overall structure, generally through the winding of the heat transfer coil pipe of single channel integral type and forms, and its structure is complicated, and the heat transfer coil pipe is difficult to guarantee the machining precision, and manufacturing process is complicated, wholly heavy, with high costs.

The combustion heat exchange device of the steam boiler is generally arranged in an inverted vertical structure, and an air inlet, a combustor, a heat exchanger and an air outlet are sequentially arranged from top to bottom. The heat exchange pipeline that corresponds the setting with vertical burning heat transfer device, the water inlet setting is in the below, and steam outlet sets up at last minute, by supreme circuitous coiling setting down to through liquid filling effect, make the liquid water of non-gasification can effectively fill in heat exchange pipeline.

And in the process that liquid water moves forwards in the heat exchange pipeline, the liquid water is converted into a semi-liquid semi-water vapor mixed state from a liquid state, and further converted into water vapor to be sent out from a steam outlet. However, in the combustion heat exchange device with the inverted vertical structure, the heat exchange pipeline is positioned in a high-temperature area close to the top of the heat exchanger and close to the combustor, the temperature of the area reaches 1000 to 1300 ℃, a steam backflow phenomenon can be generated in the operation process, when the steam flows back to the high-temperature area, the heat exchange pipeline is contacted with the steam in a high-temperature environment of 1000 to 1300 ℃, the corrosion or the rupture phenomenon is easily generated, the steam boiler is damaged, and the service life is short.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a fully premixed condensing combustion heat exchange device for a steam boiler.

The technical scheme adopted by the embodiment of the invention for solving the technical problem is as follows: a fully premixed condensing combustion heat exchange unit for a steam boiler, comprising: the packaging base shell, the combustor, the high-temperature heat exchange module, the overheating heat exchange module, the condensation heat exchange module and the steam heat exchange pipeline are packaged;

the packaging base shell is provided with an air inlet and an air outlet, and the combustor, the high-temperature heat exchange module, the overheating heat exchange module and the condensation heat exchange module are sequentially arranged in the packaging base shell on a path from the air inlet to the air outlet;

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 connecting section and a superheated steam section which are sequentially communicated; the condensation heat exchange section is arranged on the condensation heat exchange module; the fluid heat exchange section and the superheated steam section are arranged on the superheated heat exchange module and are mutually independent; the high-temperature heat exchange section is arranged on the high-temperature heat exchange module.

Optionally, the external steam connecting section is provided with a pressure changing member; the pressure intensity variable component can divide the external steam connecting section into a front steam channel and a rear steam channel with different pressure intensities.

Optionally, the pressure changing member is a pressure adjusting sheet fixed in the external steam connecting section; the outer edge of the pressure regulating sheet is fixed in the external steam connecting section; and the middle part of the pressure regulating sheet is provided with a beam converging hole, and the aperture of the beam converging hole is smaller than that of the external steam connecting section.

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

Optionally, the condensation heat exchange module comprises a plurality of condensation heat exchange tubes, two condensation clamping plates, a condensation rotary connecting assembly, a condensation input interface and a condensation output interface;

the two condensation splints are arranged at intervals, and a condensation heat exchange area is formed; two ends of the plurality of condensation heat exchange tubes are respectively arranged on one condensation clamping plate; two adjacent condensation heat exchange tubes are communicated through a condensation rotary connecting assembly, and a coherent condensation heat exchange section is formed; the condensation heat exchange section is connected with the condensation input interface and the condensation output interface.

Optionally, the plurality of condensation heat exchange tubes are of a grid structure, and a plurality of transverse rows and a plurality of vertical columns are arranged at intervals;

the condensation rotary connecting assembly is respectively provided with a condensation transverse communicating assembly and a condensation vertical communicating assembly; the condensation transverse communication component can enable two adjacent condensation heat exchange tubes in the same transverse row to be positioned at one end of the same condensation clamping plate and communicated with each other; the vertical condensation communicating component can enable two adjacent condensation heat exchange tubes in the same vertical column to be located at one end of the same condensation clamping plate to be communicated.

Optionally, the superheating heat exchange module comprises a plurality of superheating heat exchange tubes, two superheating rotary connection assemblies, a fluid superheating input interface, a fluid superheating output interface, a steam superheating input interface, and a steam superheating output interface;

the two overheating rotary connecting assemblies are arranged at intervals, and two ends of a plurality of overheating heat exchange tubes are respectively installed on one overheating rotary connecting assembly; the overheating rotary connecting assembly is provided with a plurality of overheating rotary connecting cavities, and two adjacent overheating heat exchange tubes are communicated through the overheating rotary connecting cavities, so that the fluid heat exchange section and the overheating steam section which are mutually independent and coherent can be formed; the fluid heat exchange section is connected with the fluid overheating input interface and the fluid overheating output interface; the superheated steam section is connected with the steam superheat input interface and the steam superheat output interface.

Optionally, the plurality of overheating heat exchange tubes are of a grid structure, and a plurality of transverse rows and a plurality of vertical columns are arranged at intervals;

the overheating rotary connecting assembly comprises an overheating connecting seat, an overheating guide plate and an overheating blind plate; the overheating connecting seats are vertically extended and provided with a plurality of overheating rotary connecting cavities, and the overheating heat exchange tubes can extend into the overheating rotary connecting cavities; the overheating connecting seat is provided with a horizontal baffle rib which can block the communication of the two vertical overheating rotary connecting cavities;

the overheating guide plates or overheating blind plates are arranged between every two adjacent overheating connecting seats; the overheating blind plate can block the communication of the two transverse overheating rotary connecting cavities; the overheating guide plate is provided with an overheating transverse guide hole, so that the two transverse overheating rotary connecting cavities can be communicated.

Optionally, the high-temperature heat exchange module comprises a plurality of high-temperature heat exchange tubes, two high-temperature clamping plate assemblies, a high-temperature rotary connecting assembly, a high-temperature input interface and a high-temperature output interface;

the two high-temperature clamping plate assemblies are arranged at intervals, and two ends of a plurality of high-temperature heat exchange tubes can be respectively arranged on one high-temperature clamping plate assembly; two adjacent high-temperature heat exchange tubes are communicated through the high-temperature rotary connecting assembly, and a coherent 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.

Optionally, the steam heat exchange pipeline is one or a combination of a plurality of flat pipes, round pipes, rectangular pipes or finned pipes.

The invention has the beneficial effects that: the combustion heat exchange device is provided with a packaging base shell which is surrounded to form a combustion heat exchange chamber, the packaging base shell is provided with an air inlet and an air outlet, and the combustor, the high-temperature heat exchange module, the overheating heat exchange module and the condensation heat exchange module are sequentially arranged in the packaging base shell on a path from the air inlet to the air outlet. The flame that the combustor burning produced, form the heat transfer region that the interval of temperature degressive gradually towards the air outlet direction, the heat that high temperature flame formed is mostly absorbed by the high temperature heat exchange module and the overheated heat exchange module that are close to the combustor, low temperature flue gas gets into condensation heat exchange module immediately afterwards, carry out the condensation and heat in advance, the whole consistent compactness of burning heat transfer device, be convenient for with the combustor, high temperature heat exchange module, overheated heat exchange module and the integration of condensation heat exchange module are installed in the encapsulation base shell, reduce whole weight, moreover, the steam generator is compact in structure, effectively reduce manufacturing cost.

In addition, 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 connecting section and a superheated steam section which are sequentially communicated; the condensation heat exchange section carries out premixed heat exchange at the condensation heat exchange module by using low-temperature flue gas, and preliminarily heats the internal liquid; then the liquid enters a fluid heat exchange section which is arranged on the overheating heat exchange module, the temperature of the area reaches the range of 500-700 ℃, and the fluid can be further subjected to heat exchange to improve the overall temperature of the liquid; then the liquid enters a high-temperature heat exchange section which is arranged in a high-temperature heat exchange module, the high-temperature heat exchange module is arranged close to a combustor, the temperature of the area reaches the range of 1000-1300 ℃, the high-temperature heat exchange module is a working area for carrying out main heat exchange, and most of the liquid can be converted into steam or semi-liquid semi-vapor mixed form in the high-temperature heat exchange section; and then, the steam flows to the superheated steam section through the external steam connecting section, absorbs heat again in the superheated steam section and is completely converted into steam, and the steam is sent out of the combustion heat exchange device. According to the invention, the final conversion part of the steam in the steam heat exchange pipeline is the tail end superheated steam section, the temperature of the corresponding superheated heat exchange module area is in the range of 500-700 ℃, and the metal heat exchange tube is in the environment temperature range and has stronger corrosion resistance and rupture resistance compared with the condition that the high-temperature environment of the high-temperature heat exchange module is contacted with steam, so that the phenomenon of damage of a combustion heat exchange device is effectively reduced, and the service life is prolonged.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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

FIG. 1 is a schematic structural diagram of a fully premixed condensing combustion heat exchange device for a steam boiler according to one embodiment of the present invention;

FIG. 2 is a schematic structural view of the combustion heat exchange device in FIG. 1 with the packaging shell removed;

FIG. 3 is a front view of the combustion heat exchange unit of FIG. 1;

FIG. 4 is a cross-sectional view of the combustion heat exchange unit of FIG. 3 taken along line V1-V1;

FIG. 5 is a side view of the combustion heat exchange unit of FIG. 1;

FIG. 6 is a cross-sectional view of the combustion heat exchange unit of FIG. 5 taken along line V2-V2;

FIG. 7 is a schematic view of the path of a steam heat exchange circuit according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a pressure adjustment tab according to one embodiment of the present invention;

FIG. 9 is an exploded view of a condensing heat exchange module according to an embodiment of the present invention;

FIG. 10 is an exploded view of a superheating heat exchange module according to one embodiment of the present invention;

fig. 11 is an exploded view of a high temperature heat exchange module according to an embodiment of the present invention.

Description of the main element symbols:

100. packaging the base shell; 200. the high-temperature rotary heat exchange device comprises a combustor, 300, a high-temperature heat exchange module, 310, a high-temperature heat exchange tube, 320, a high-temperature clamping plate assembly, 330, a high-temperature rotary connecting assembly, 331 and a high-temperature rotary connecting cavity; 332. a high temperature rotary shell base; 333. a high-temperature sealing plate; 340. a high-temperature input interface, 350 and a high-temperature output interface; 400. a superheating heat exchange module 410, a fluid superheating area; 420. a steam overheating zone; 430. the overheating heat exchange pipes, 440, the overheating rotary connecting assembly, 441 and the overheating rotary connecting cavity; 442. the overheating connecting seat, 443, the overheating guide plate, 444 and the overheating blind plate; 445. overheating transverse diversion holes; 446. horizontal baffle ribs; 450. fluid superheat input interface, 460, fluid superheat output interface, 470, steam superheat input interface, 480, steam superheat output interface; 500. a condensing heat exchange module; 510. the condensation heat exchange pipe, 520, the condensation clamping plate, 530, the condensation rotary connecting assembly, 531 and the condensation transverse communicating assembly; 532. a condensing vertical communication assembly; 533. the condensation connecting shell wall; 534. a condensation closing plate; 535. the two paths are communicated with the cavity; 536. a condenser tube socket; 540. a condensation input interface; 550. a condensation output interface; 600. a steam heat exchange line; 610. a condensation heat exchange section 620, a fluid heat exchange section 630, a high-temperature heat exchange section 640, an external steam connecting section 650 and a superheated steam section; 700. a pressure varying member; 710. a pressure regulating sheet; 720. a beam-converging hole.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly defined, the terms "disposed," "installed," "connected," and the like are to be understood broadly, and may be, for example, directly connected or indirectly connected through an intermediate medium; can be fixedly connected, can be detachably connected and can be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical field can reasonably determine the specific meaning of the words in the invention by combining the specific contents of the technical scheme.

Examples

Referring to fig. 1 to 11, the present invention provides a fully premixed condensing combustion heat exchange device for a steam boiler, comprising: a packaging base shell 100, a burner 200, a high-temperature heat exchange module 300, an overheating heat exchange module 400, a condensing 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 overheating heat exchange module 400 and the condensation heat exchange module 500 are sequentially arranged in the packaging base shell 100 on a 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 connecting section 640 and a superheated steam section 650 which are sequentially communicated; the condensing heat exchange section 610 is arranged on the condensing heat exchange module 500; the fluid heat exchange section 620 and the superheated steam section 650 are disposed in the superheated heat exchange module 400, and are independent of each other; the high-temperature heat exchange section 630 is disposed at the high-temperature heat exchange module 300.

In the present invention, the combustion heat exchange device has a packaging base shell 100 enclosing to form a combustion heat exchange chamber, 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 overheating heat exchange module 400 and the condensation heat exchange module 500 are sequentially disposed in the packaging base shell 100 on the path from the air inlet to the air outlet. The flame that the combustor 200 burning produced, form the heat transfer region that the temperature interval degressive gradually towards the air outlet direction, the heat that high temperature flame formed is mostly absorbed by high temperature heat exchange module 300 and the overheated heat exchange module 400 that are close to combustor 200, low temperature flue gas gets into condensation heat exchange module 500 immediately afterwards, carry out the condensation and mix the heating in advance, the whole company of burning heat transfer device is compact, be convenient for with combustor 200, high temperature heat exchange module 300, overheated heat exchange module 400 and the combination integrated installation of condensation heat exchange module 500 in encapsulation base casing 100, reduce whole weight, compact structure, effectively reduce manufacturing cost.

In addition, 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 connecting section 640 and a superheated steam section 650 which are sequentially communicated; the condensation heat exchange section 610 performs pre-mixing heat exchange at the condensation heat exchange module 500 by using low-temperature flue gas, and primarily heats the internal liquid; then enters a fluid heat exchange section 620, the fluid heat exchange section 620 is arranged in the overheating heat exchange module 400, the temperature of the area reaches the range of 500-700 ℃, and further heat exchange can be carried out on the fluid so as to improve the overall temperature of the liquid; then the gas enters a high-temperature heat exchange section 630, the high-temperature heat exchange section 630 is arranged on the high-temperature heat exchange module 300, the high-temperature heat exchange module 300 is arranged close to the combustor 200, the temperature of the region reaches the range of 1000-1300 ℃, the region is a working region for carrying out main heat exchange, and most of liquid can be converted into steam or semi-liquid semi-water vapor mixed form in the high-temperature heat exchange section 630; then flows to the superheated steam section 650 through the external steam connection section 640, absorbs heat again in the superheated steam section 650, and is completely converted into steam, so as to be sent out of the combustion heat exchange device. According to the invention, the final conversion part of the steam in the steam heat exchange pipeline 600 is the tail end superheated steam section 650, the temperature of the corresponding superheated heat exchange module 400 area is in the range of 500-700 ℃, and the metal heat exchange tube is in the environment temperature range, compared with the high-temperature environment of the high-temperature heat exchange module 300 which is in contact with the steam, the metal heat exchange tube has stronger corrosion resistance and rupture resistance, so that the damage phenomenon of a combustion heat exchange device is effectively reduced, and the service life is prolonged.

In the present embodiment, the external steam connection section 640 is provided with a pressure varying member 700; the pressure varying member 700 may separate the external steam connection segment 640 into a front steam channel and a rear steam channel with different pressures. The pressure of the liquid water or semi-liquid semi-water vapor mixture in the steam heat exchange pipeline 600 is higher than that of the gaseous steam, so that when the external steam connecting section 640 is divided into steam channels with different pressures at the front end and the rear end by the pressure varying member 700, the gaseous steam diffuses towards the steam channel with relatively low pressure. The steam channel with high pressure is positioned at one side close to the high-temperature heat exchange section 630, and the steam channel with low pressure is positioned at one side close to the superheated steam section 650, so that the gaseous steam is diffused towards the superheated steam section 650, the steam of the superheated steam section 650 is effectively prevented from flowing back to the high-temperature heat exchange section, and the high-temperature heat exchange section is prevented from being corroded due to the flowing back steam.

In this embodiment, the air inlet is mainly disposed at the top of the package base 100, the air outlet is disposed at the bottom of the package base 100, and the whole combustion heat exchange device is disposed in a vertical inverted structure.

In some embodiments, a heat insulating layer structure is disposed inside the enclosure, so that heat generated by the burner 200 can be collected in the combustion heat exchange chamber inside the enclosure, thereby avoiding overflow and improving capacity utilization.

In some embodiments, the pressure varying member 700 is a removably mounted adjustable flow regulator. The adjustable flow regulator is a direct application to prior art products, where the detailed second rate is not further applied. The flow rate of the semi-liquid semi-steam passing through the flow regulator and near the superheated steam section 650 can be varied by the manufacturer via the flow regulator to vary the pressure on that side to match different fuels and use environments for adjustment.

In some embodiments, to avoid user error, the pressure varying member 700 is a pressure regulating flap 710 secured within an external vapor connection segment 640.

Referring to fig. 8, specifically, the outer edge of the pressure adjusting piece 710 is fixed in the external steam connecting section 640; the middle part of the pressure regulating sheet 710 is provided with a beam closing hole 720, and the aperture of the beam closing hole 720 is smaller than that of the external steam connecting section 640. According to the venturi effect, the fluid restricted to flow in the external steam connection 640 has an increased flow velocity when the converging hole 720 passes through a reduced flow cross-section, which is inversely proportional to the flow cross-section. Since the pressure of the fluid decreases as the flow rate increases according to bernoulli's law, the pressure of the gas decreases at the side of the pressure adjusting plate 710 close to the superheated steam segment 650, and the gaseous steam diffuses toward the side of the external steam connecting segment 640 having a relatively low pressure close to the superheated steam segment 650, thereby effectively preventing the steam from flowing back to the high-temperature heat exchange segment.

In the present embodiment, 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 far away from the high-temperature heat exchange module 300. Because the steam superheating area 420 is far away from the combustor 200 relative to the fluid superheating area 410, the temperature of the superheated steam section 650 mainly formed and filled with steam is relatively lower, and therefore the metal heat exchange tube of the superheated steam section 650 is relatively less prone to corrosion or cracking, the phenomenon that the combustion heat exchange device is damaged is effectively reduced, and the service life is prolonged.

Referring to fig. 9, in some embodiments, the condensing heat exchange module 500 includes a plurality of condensing heat exchange pipes 510, two condensing clamping plates 520, a condensing rotation connection assembly 530, a condensing input interface 540, and a condensing output interface 550; the two condensation splints 520 are arranged at intervals and form condensation heat exchange areas; two ends of the plurality of condensation heat exchange tubes 510 are respectively arranged on a condensation splint 520; two adjacent condensing heat exchange tubes 510 are communicated through the condensing rotary connecting component 530 to form a coherent condensing heat exchange section 610; the condensing heat exchange section 610 is connected with a condensing input interface 540 and a condensing output interface 550. The condensation heat exchange module 500 which can be connected with the high-temperature heat exchange module 300 and the overheating heat exchange module 400 is formed by the condensation clamping plate 520, the condensation heat exchange tube 510 and the rotary connecting assembly which are arranged in a split mode, the structure is simple and compact, the manufacturing process is simple, the processing is convenient, and the production cost is effectively reduced.

Specifically, the plurality of condensing heat exchange tubes 510 are of a grid structure, and a plurality of transverse rows and a plurality of vertical columns are arranged at intervals; a plurality of condensation heat exchange tubes 510 fixed by two condensation clamping plates 520 are clamped to form a grid arrangement structure, even if the whole structure is a cuboid structure, a flowing space is provided for high-heat smoke to penetrate through, the space for heat exchange in contact with the condensation heat exchange tubes 510 is ensured, the whole structure is simple and compact, and the whole body which is convenient to form with a combustion device is continuous.

Further, the condensation rotary connection assembly 530 is respectively provided with a condensation transverse communication assembly 531 and a condensation vertical communication assembly 532; the condensation transverse communication component 531 can enable two adjacent condensation heat exchange tubes 510 in the same transverse row to be positioned at one end of the same condensation clamping plate 520 for communication; the condensation vertical communication assembly 532 can enable two adjacent condensation heat exchange tubes 510 in the same vertical column to be communicated at one end of the same condensation clamping plate 520. By using the condensation transverse communication component 531 and the condensation vertical communication component 532 in a matching manner, the plurality of condensation heat exchange tubes 510 arranged in a longitudinal and transverse grid manner can be communicated with each other two by two, so that a complete unidirectional coherent circulation condensation heat exchange channel is formed.

In some embodiments, the condensing rotary connecting assembly 530 includes a condensing connecting housing wall 533 and a condensing seal plate 534; the connecting shell wall and the closing plate are surrounded to form a two-way communication return cavity 535, and one end of the condensing heat exchange tube 510 can extend into the two-way communication return cavity 535.

Specifically, the condensing connecting casing wall 533 is provided with a condensing pipe socket 536, and one end of the condensing heat exchanging pipe 510 can be connected to the condensing pipe socket 536. For the transverse communication assembly, two condenser tube sockets 536 are arranged at intervals along the vertical direction; for a vertical communication assembly, there are two condenser tube sockets 536 spaced vertically apart.

Referring to fig. 10, in some embodiments, the superheating heat exchange module 400 comprises a plurality of superheating heat exchange tubes 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 overheating rotary connection assemblies 440 are arranged at intervals, and two ends of the plurality of overheating heat exchange tubes 430 are respectively installed on one overheating rotary connection assembly 440; the overheating rotary connection assembly 440 is provided with a plurality of overheating rotary connection cavities 441, and two adjacent overheating heat exchange tubes 430 are communicated through the overheating rotary connection cavities 441 to form a fluid heat exchange section 620 and an overheating steam section 650 which are independent and coherent with each other; the fluid heat exchange section 620 is connected with a fluid overheating input interface 450 and a fluid overheating output interface 460; the superheated steam section 650 is connected to a steam superheat input interface 470 and a steam superheat output interface 480. Similar to the condensation heat exchange module 500, the superheating heat exchange module 400 has two superheating rotary connection assemblies 440, so that a plurality of superheating heat exchange tubes 430 which are arranged in a split manner can form a fluid heat exchange section 620 and a superheated steam section 650 which flow in a single direction and are independent of each other, and can be used in cooperation with the high-temperature heat exchange module 300 and the condensation heat exchange module 500, and the structure is simple and compact.

In some embodiments, similar to the condensing heat exchange module 500, the plurality of superheating heat exchange tubes 430 are in a grid structure and are arranged in a plurality of horizontal rows and a plurality of vertical columns at intervals; even if the whole body is of a cuboid structure, the space for the high-heat smoke to flow through is provided, and the space for the contact heat exchange with the overheating heat exchange tube 430 is ensured.

In some embodiments, the overheating swivel connection assembly 440 includes an overheating connection socket 442, an overheating baffle 443, and an overheating blind plate 444; the overheating connecting seat 442 extends vertically and is provided with a plurality of overheating rotary connecting cavities 441 vertically, and the overheating heat exchange tube 430 can extend into the overheating rotary connecting cavities 441; the overheating connecting seat 442 is provided with a horizontal baffle rib 446 which can block the communication of the two vertical overheating rotary connecting cavities 441; a plurality of overheating connection seats 442 are arranged side by side, and an overheating guide plate 443 or an overheating blind plate 444 is arranged between every two adjacent overheating connection seats 442; the overheating blind plate 444 can obstruct the communication of the two transverse overheating rotary connecting cavities 441; the overheating guide plate 443 is provided with an overheating transverse guide hole 445, so that the two transverse overheating rotary connecting cavities 441 can be communicated. By using the blind plate with the function of transverse blocking, the overheating guide plate 443 with the function of transverse conduction and the horizontal baffle rib 446 with the function of vertical blocking, the two overheating rotary connecting cavities 441 can be communicated only in the transverse two communication or the vertical two communication, so that the reciprocating and circuitous fluid heat exchange section 620 or the overheating steam section 650 is formed.

Referring to fig. 11, in some embodiments, the high temperature heat exchange module 300 includes a plurality of high temperature heat exchange pipes 310, two high temperature clamping plate assemblies 320, a high temperature rotation connection assembly 330, a high temperature input interface 340, and a high temperature output interface 350; the two high-temperature clamping plate assemblies 320 are arranged at intervals, and two ends of the plurality of high-temperature heat exchange tubes 310 can be respectively arranged on one high-temperature clamping plate assembly 320; two adjacent high-temperature heat exchange tubes 310 are communicated through a high-temperature rotary connecting component 330, and a coherent high-temperature heat exchange section 630 is formed; the high temperature heat exchange section 630 is connected with a high temperature input interface 340 and a high temperature output interface 350. The high-temperature heat exchange module 300 which is in a cuboid structure and can be connected with the combustor 200 and the overheating heat exchange module 400 is formed by the high-temperature clamping plate component 320, the high-temperature heat exchange tube 310 and the high-temperature rotary connecting component 330 which are arranged in a split mode, and the high-temperature heat exchange module is simple and compact in structure, simple in manufacturing process and convenient to machine.

Specifically, the high temperature rotating connection assembly 330 includes a high temperature rotating housing base 332 and a high temperature seal plate 333; the high-temperature rotary shell seat 332 and the high-temperature sealing plate 333 are enclosed to form a plurality of high-temperature rotary connecting cavities 331; the high temperature rotary connecting chamber 331 may connect the two high temperature heat exchanging pipes 310.

Preferably, the high-temperature heat exchange module 300, the superheated heat exchange module 400 and the condensation heat exchange module 500 are combined to form an integral module with a rectangular parallelepiped structure by a plurality of components arranged separately, so as to be conveniently arranged in the package base housing 100 in a vertically inverted manner with the burner 200.

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

It is to be understood that the present invention is not limited to the above-described embodiments, and that equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and that such equivalent modifications and substitutions are to be included within the scope of the appended claims.

Claims (10)

1. A full premix condensation combustion heat transfer device for steam boiler, characterized in that includes: the heat exchanger comprises a packaging base shell (100), a combustor (200), a high-temperature heat exchange module (300), an overheating 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 combustor (200), the high-temperature heat exchange module (300), the overheating heat exchange module (400) and the condensation heat exchange module (500) are sequentially arranged in the packaging base shell (100) on a 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 connecting section (640) and a superheated steam section (650) which are sequentially communicated; the condensation heat exchange section (610) is arranged on the condensation heat exchange module (500); the fluid heat exchange section (620) and the superheated steam section (650) are arranged on the superheated heat exchange module (400) and are independent of each other; the high-temperature heat exchange section (630) is arranged on the high-temperature heat exchange module (300).

2. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 1, wherein: the external steam connecting section (640) is provided with a pressure intensity changing piece (700); the pressure change piece (700) can separate the external steam connecting section (640) into a front steam channel and a rear steam channel with different pressures.

3. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 2, wherein: the pressure changing piece (700) is a pressure adjusting sheet (710) fixed in the external steam connecting section (640); the outer edge of the pressure regulating sheet (710) is fixed in the external steam connecting section (640); the middle part of the pressure intensity adjusting sheet (710) is provided with a beam-collecting hole (720), and the aperture of the beam-collecting hole (720) is smaller than that of the external steam connecting section (640).

4. The fully premixed condensing combustion heat exchange device for a steam boiler according to 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 overheating area (410) is arranged close to the high-temperature heat exchange module (300), and the steam overheating area (420) is arranged on the side, far away from the high-temperature heat exchange module (300), of the fluid overheating area (410).

5. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 1, wherein: the condensation heat exchange module (500) comprises a plurality of condensation heat exchange tubes (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 a condensation heat exchange area is formed; two ends of a plurality of condensation heat exchange tubes (510) are respectively arranged on one condensation clamping plate (520); two adjacent condensing heat exchange tubes (510) are communicated through a condensing rotary connecting component (530) and form a coherent condensing heat exchange section (610); the condensation heat exchange section (610) is connected with the condensation input interface (540) and the condensation output interface (550).

6. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 5, wherein: the plurality of condensation heat exchange tubes (510) are of a grid structure, and a plurality of transverse rows and a plurality of vertical columns are arranged at intervals;

the condensation rotary connecting assembly (530) is respectively provided with a condensation transverse communicating assembly (531) and a condensation vertical communicating assembly (532); the condensation transverse communication component (531) can enable two adjacent condensation heat exchange tubes (510) in the same transverse row to be positioned at one end of the same condensation clamping plate (520) to be communicated; the condensation vertical communication assembly (532) can enable two adjacent condensation heat exchange tubes (510) in the same vertical column to be positioned at one end of the same condensation clamping plate (520) to be communicated.

7. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 1, wherein: the superheating heat exchange module (400) comprises a plurality of superheating heat exchange tubes (430), two superheating rotary connecting 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 overheating rotary connecting assemblies (440) are arranged at intervals, and two ends of a plurality of overheating heat exchange tubes (430) are respectively installed on one overheating rotary connecting assembly (440); the overheating rotary connecting assembly (440) is provided with a plurality of overheating rotary connecting cavities (441), and two adjacent overheating heat exchange tubes (430) are communicated through the overheating rotary connecting cavities (441) to form the fluid heat exchange section (620) and the overheating steam section (650) which are independent and consecutive; the fluid heat exchange section (620) is connected with the fluid overheating input interface (450) and the fluid overheating output interface (460); the superheated steam section (650) is connected with the steam superheat input interface (470) and the steam superheat output interface (480).

8. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 7, wherein: the plurality of overheating heat exchange tubes (430) are of a grid structure, and a plurality of transverse rows and a plurality of vertical columns are arranged at intervals;

the overheating rotary connection assembly (440) comprises an overheating connection seat (442), an overheating guide plate (443) and an overheating blind plate (444); the overheating connection seats (442) are vertically extended and vertically provided with a plurality of overheating rotary connection cavities (441), and the overheating heat exchange tubes (430) can extend into the overheating rotary connection cavities (441); the overheating connecting seat (442) is provided with a horizontal baffle rib (446) which can block the communication of the two vertical overheating rotary connecting cavities (441);

the plurality of overheating connection seats (442) are arranged side by side, and the overheating guide plate (443) or the overheating blind plate (444) is arranged between every two adjacent overheating connection seats (442); the overheating blind plate (444) can obstruct the communication of the two transverse overheating rotary connecting cavities (441); the overheating guide plate (443) is provided with an overheating transverse guide hole (445), so that the two transverse overheating rotary connecting cavities (441) can be communicated.

9. The fully premixed condensing combustion heat exchange device for a steam boiler according to 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);

the two high-temperature clamping plate assemblies (320) are arranged at intervals, and two ends of a plurality of high-temperature heat exchange pipes (310) can be respectively arranged on one high-temperature clamping plate assembly (320); two adjacent high-temperature heat exchange tubes (310) are communicated through a high-temperature rotary connecting assembly (330) to form a coherent 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).

10. The fully premixed condensing combustion heat exchange device for a steam boiler according to claim 1, wherein: the steam heat exchange pipeline (600) is one or a combination of a plurality of flat pipes, round pipes, rectangular pipes or finned pipes.

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