Integral direct-fired generator and condenser structure

Abstract

The utility model provides an integral direct-fired generator and condenser structure. The integral direct-fired generator and condenser structure comprises a direct-fired generator furnace pipe, a direct-fired generator convection heat exchange component, an underwater staggered pore plate, a condenser water disc and a condenser heat transfer tube bundle which are arranged in a direct-fired generator-condenser shell from low to high; a lithium bromide solution is located on the inner side of the direct-fired generator-condenser shell and located between the direct-fired generator furnace pipe and the direct-fired generator convection heat exchange component; the underwater staggered pore plate, the condenser water tray and the condenser heat transfer tube bundle are positioned above the liquid level of the lithium bromide solution; the liquid blocking grid plate is arranged between the outer side of the condenser water disc and the direct combustion generator-condenser shell. The space from the liquid level in the direct-fired generator to the upper part of the shell is fully utilized; the underwater staggered pore plate can stabilize the boiling liquid level and is beneficial to reducing the gas-liquid separation height and the overall height of the direct combustion generation-condenser; due to the integrated structure, a condenser shell and a steam pocket are omitted, and the height and the width of the unit are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recycling technical field especially is related to a whole type direct combustion generator and condenser structure. BACKGROUND

[0002] Current direct combustion type lithium bromide absorption heat pump unit is widely used in natural gas flue gas, coal-fired flue gas desulfurization deep waste heat recovery engineering or other waste heat recovery engineering, utilizes natural gas drive, and the heat of extracted low temperature heat source heats the heat network water of concentrated heat supply or the hot water required by production process.

[0003] The direct combustion generator and condenser of conventional structure, the steam pocket is arranged at the top of generator shell, the steam pocket is a certain height from the solution liquid level in the generator, there is a liquid baffle in the steam pocket, the height and the baffle separate the lithium bromide droplet carried in the refrigerant steam, prevent it from entering the condenser and causing refrigerant water pollution, and the steam pocket is connected with the shell of condenser through multiple pipelines.This conventional structure direct combustion generator and condenser are divided into two shells, which increases the height or width of the unit, and for large-capacity units, the unit also needs to be transported on site, which also increases the production, transportation and installation costs. UTILITY MODEL CONTENTS

[0004] The utility model discloses a whole type direct combustion generator and condenser structure, adopt integrated structure form, save the condenser shell, steam pocket, reduce material and production cost, still reduce the unit height and width, and the direct combustion generator and condenser part can be integrated transportation, hoist and place, and transportation and installation cost will further reduce.

[0005] According to the utility model, a whole type direct combustion generator and condenser structure are provided, which comprises a direct combustion generator furnace, a direct combustion generator convection heat exchange component, an underwater staggered orifice plate, a condenser water pan, a liquid baffle, a direct combustion generator-condenser shell and a condenser heat transfer tube bundle.

[0006] The lithium bromide solution is located inside the direct combustion generator-condenser shell and between the direct combustion generator furnace and the direct combustion generator convection heat exchange component.

[0007] The liquid blocking grid is arranged between the outer side of the condenser water tray and the direct combustion generator-condenser shell.

[0008] Further, the liquid blocking grid comprises two pieces arranged on the outer side of the condenser water tray, and the liquid blocking grid is equal in length to the direct combustion generator-condenser shell.

[0009] Further, the underwater staggered hole plate is 50mm higher than the height of the LiBr solution surface above the direct combustion generator convection heat exchange component.

[0010] Further, the condenser heat transfer pipe bundle is located inside the condenser water tray, and the condenser heat transfer pipe bundle extends out of the direct combustion generator-condenser shell in the length direction.

[0011] Further, the opening size at the position where the condenser heat transfer pipe bundle extends out of the direct combustion generator-condenser shell is greater than the pipe arrangement range of the condenser heat transfer pipe bundle.

[0012] Further, both ends of the condenser heat transfer pipe bundle are fixed on the tube sheet, and a shell is connected between the tube sheet and the direct combustion generator-condenser shell, and the shell and the inside of the direct combustion generator-condenser shell communicate to form a vacuum space.

[0013] Further, an elastic expansion piece is further included, and the elastic expansion piece is arranged on the shell between the direct combustion generator-condenser shell and the tube sheet of the condenser heat transfer pipe bundle.

[0014] Further, a heat insulation layer is further included, and the heat insulation layer is arranged at the bottom of the condenser water tray.

[0015] Further, the heat insulation layer adopts a thin steel plate with a folding edge of 1-2mm around the condenser water tray.

[0016] Further, the heat exchange pipes in the direct combustion generator convection heat exchange component are arranged vertically, flue gas flows outside the heat exchange pipes, and solution flows inside the heat exchange pipes.

[0017] The technical solution of this utility model submerges the condenser water pan and heat transfer tubes inside the direct-fired generator cylinder. A liquid-blocking grid is installed between the inner side of the direct-fired generator casing and the outer side of the condenser water pan, fully utilizing the space between the liquid surface inside the generator and the upper part of the casing. The length of the liquid-blocking grid is equal to that of the direct-fired generator casing, and two grids can be arranged on the left and right sides. This increases the area for condensed steam flow through the grid, reduces the speed and resistance of refrigerant steam flowing through it, and is more conducive to liquid blocking and preventing refrigerant contamination. Furthermore, an underwater staggered perforated plate is installed above the lithium bromide solution surface in the direct-fired generator, which stabilizes the boiling liquid surface, reduces the number of lithium bromide droplets carried by the refrigerant steam, and also helps to reduce the gas-liquid separation height and the overall height of the direct-fired generator-condenser. The integrated structure saves on the condenser casing and steam drum, reducing material and production costs, and also reduces the height and width of the unit. The direct-fired generator and condenser can be transported and hoisted together, further reducing transportation and installation costs. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 This is another structural schematic diagram of an embodiment of the present utility model;

[0021] In the figure: 1. Direct-fired generator furnace; 2. Direct-fired generator convective heat exchange components; 3. Underwater staggered perforated plate; 4. Insulation layer; 5. Condenser water pan; 6. Liquid baffle plate; 7. Direct-fired generator-condenser shell; 8. Condenser heat transfer tube bundle; 9. Flexible expansion joint; 10. Tube sheet. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, "a plurality of" means two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Example 1

[0026] As shown in Figure 1 and Figure 2 ,

[0027] A whole straight combustion generator and condenser structure, comprising a straight combustion generator furnace 1, a straight combustion generator convection heat exchange part 2, an underwater staggered hole plate 3, a heat insulation layer 4, a condenser water tray 5, a liquid blocking grid plate 6, a straight combustion generator-condenser shell 7, a condenser heat transfer pipe bundle 8 and an elastic expansion joint 9.

[0028] The straight combustion generator furnace 1 and the straight combustion generator convection heat exchange part 2 are connected, covered by the straight combustion generator-condenser shell 7, and the lithium bromide solution is between the inside of the straight combustion generator-condenser shell 7 and the straight combustion generator furnace 1 and the straight combustion generator convection heat exchange part 2.

[0029] The natural gas or fuel is combusted in the straight combustion generator furnace 1, the produced flame and high temperature flue gas mainly transfers heat to the outside lithium bromide solution in the form of heat radiation, the reduced temperature flue gas continues to enter the straight combustion generator convection heat exchange component 2, the heat is transferred to the outside lithium bromide solution mainly through the tube bundle and shell of the straight combustion generator convection heat exchange component 2 in the form of convection heat exchange, the flue gas is discharged after being reduced to the design temperature, and meanwhile the released heat is used for the concentration process of the lithium bromide solution.

[0030] The heat exchange tubes in the straight combustion generator convection heat exchange component 2 are arranged vertically, the flue gas flows outside the heat exchange tubes, and the solution flows inside the heat exchange tubes.

[0031] The underwater staggered orifice plate 3, the condenser water tray 5 and the condenser heat transfer tube bundle 8 are sequentially placed from low to high above the straight combustion generator convection heat exchange component 2 and above the liquid level of the lithium bromide solution.

[0032] The liquid blocking grid plate 6 is located between the outside of the condenser water tray 5 and the inside of the straight combustion generator-condenser shell 7 and is divided into two parts from left to right, which is equal in length to the straight combustion generator-condenser shell 7, thereby increasing the flow area of the refrigerant vapor at the liquid blocking grid plate 6 and reducing the vapor flow rate at the position of the liquid blocking grid plate 6, which is more conducive to blocking the lithium bromide droplets in the refrigerant vapor and reducing the gas-liquid separation height.

[0033] The underwater staggered orifice plate 3 is about 50 mm higher than the lithium bromide solution liquid level height above the straight combustion generator convection heat exchange component 2 which needs to be controlled, and its function is to stabilize the liquid level of the lithium bromide solution in the straight combustion generator, control the boiling intensity, reduce the amount of lithium bromide droplets carried in the refrigerant vapor, thereby reducing the gas-liquid separation height between the liquid blocking grid plate 6 and the underwater staggered orifice plate 3, and thereby reducing the height of the integral straight combustion generator and condenser.

[0034] The condenser heat transfer tube bundle 8 is located inside the condenser water tray 5, the tube bundle inside flows through the heat network water, the refrigerant vapor produced by condensing the concentrated solution of the straight combustion generator is condensed outside the tube bundle, releases heat to the heat network water flowing inside the tube bundle and makes it warm, and the condensed refrigerant water enters the condenser water tray 5 and is discharged through the refrigerant outlet pipe.

[0035] The condenser heat transfer tube bundle 8 extends out of the straight combustion generator-condenser shell 7, the opening size at the position extending out of the straight combustion generator-condenser shell 7 is greater than the tube arrangement range of the condenser heat transfer tube bundle 8, both ends of which are fixed on the tube plate 10, and a shell is also connected between the tube plate 10 and the straight combustion generator-condenser shell 7, which is in communication with the inside of the straight combustion generator-condenser shell 7, thereby forming a vacuum space.

[0036] Since the lower part of the direct-fired generator-condenser shell 7 is in contact with the lithium bromide solution, its temperature is close to the solution temperature, belonging to the high-temperature side, and the upper part is in contact with the refrigerant vapor, belonging to the low-temperature side, especially the temperature of the connecting pipe between the direct-fired generator-condenser shell 7 and the tube sheet of the condenser heat transfer pipe bundle 8 is closer to the temperature of the hot network water in the pipe bundle, and the temperature difference can be more than 60℃ or above. Due to the different thermal expansion amounts caused by the temperature difference, in order to reduce the influence of the different thermal expansion amounts on the thermal stress of the condenser heat transfer pipe bundle 8 and the direct-fired generator-condenser shell 7, an elastic expansion piece 9 is installed in the connecting pipe between the direct-fired generator-condenser shell 7 and the tube sheet of the condenser heat transfer pipe bundle 8.

[0037] Since the condenser water pan 5 is located above the direct-fired generator, in order to reduce the energy efficiency of the unit caused by the refrigerant vapor generated by the concentrated solution directly transferring part of the heat to the refrigerant water condensed in the condenser through the condenser water pan 5, a heat insulation layer 4 is arranged at the bottom of the condenser water pan 5. The heat insulation layer 4 is a thin steel plate with a thickness of 1-2mm, which is folded and buckled at the bottom of the condenser water pan 5.

[0038] Compared with the traditional direct-fired generator and condenser structure, the integrated direct-fired generator and condenser structure provided by the utility model sinks the condenser water pan and the heat transfer pipe into the direct-fired generator cylinder, installs the liquid blocking grid plate in the middle of the inner side of the direct-fired generator side shell and the outer side of the condenser water pan, fully utilizes the space from the liquid surface in the direct-fired generator to the upper part of the shell, and compared with the conventional way, the length of the liquid blocking grid plate is equal to the length of the direct-fired generator shell and can be arranged on the left and right sides, so that the area of the liquid blocking grid plate for condensing vapor flow is increased, the speed and resistance of the refrigerant vapor when flowing through the liquid blocking grid plate are reduced, and the liquid blocking and the prevention of refrigerant pollution are more favorable. In addition, the underwater staggered hole plate arranged at the upper part of the lithium bromide solution liquid surface of the direct-fired generator can stabilize the boiling liquid surface, reduce the number of lithium bromide droplets carried by the refrigerant vapor, and also be favorable for reducing the gas-liquid separation height and the overall height of the direct-fired generator-condenser. On the other hand, this integrated structure form saves the condenser shell and the steam drum, reduces the material and production cost, and reduces the unit height and width. The direct-fired generator and the condenser part can be integrally transported, hoisted and placed, and the transportation and installation cost is further reduced.

[0039] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An integrated direct-fired generator and condenser structure, characterized by, The straight combustion generator stove, the straight combustion generator convection heat exchange component, the underwater staggered orifice plate, the condenser water tray, the liquid blocking grid, the straight combustion generator-condenser shell, and the condenser heat transfer tube bundle are sequentially arranged from low to high inside the straight combustion generator-condenser shell. The lithium bromide solution is located between the straight combustion generator stove and the straight combustion generator convection heat exchange component inside the straight combustion generator-condenser shell, and the underwater staggered orifice plate, the condenser water tray, and the condenser heat transfer tube bundle are located above the liquid level of the lithium bromide solution. The liquid blocking grid is arranged between the outside of the condenser water tray and the straight combustion generator-condenser shell.

2. The unitary direct-fired generator and condenser structure of claim 1, wherein, The liquid blocking grid includes two left and right grids arranged outside the condenser water tray, and the liquid blocking grid is equal in length to the straight combustion generator-condenser shell.

3. The unitary direct-fired generator and condenser structure of claim 1, wherein, The underwater staggered orifice plate is 50 mm higher than the liquid level of the lithium bromide solution above the straight combustion generator convection heat exchange component.

4. The unitary direct-fired generator and condenser structure of claim 1, wherein, The condenser heat transfer tube bundle is located inside the condenser water tray, and the condenser heat transfer tube bundle extends out of the straight combustion generator-condenser shell in the length direction.

5. The unitary direct-fired generator and condenser structure of claim 4, wherein, The opening size at the position where the condenser heat transfer tube bundle extends out of the straight combustion generator-condenser shell is greater than the tube arrangement range of the condenser heat transfer tube bundle.

6. The unitary direct-fired generator and condenser structure of claim 5, wherein, Both ends of the condenser heat transfer tube bundle are fixed on the tube plate, and a shell is connected between the tube plate and the straight combustion generator-condenser shell, and the shell and the inside of the straight combustion generator-condenser shell communicate to form a vacuum space.

7. The unitary direct-fired generator and condenser structure of claim 6, wherein, An elastic expansion member is further arranged on the shell between the straight combustion generator-condenser shell and the tube plate of the condenser heat transfer tube bundle.

8. The unitary direct-fired generator and condenser structure of claim 1, wherein, A heat insulation layer is further arranged at the bottom of the condenser water tray.

9. The unitary direct-fired generator and condenser structure of claim 8, wherein, The heat insulation layer adopts a thin steel plate with a folding edge of 1-2 mm, which is buckled at the bottom of the condenser water tray.

10. The unitary direct-fired generator and condenser structure of claim 1, wherein, The heat exchange tubes in the straight combustion generator convection heat exchange component are vertically arranged, and the flue gas flows outside the heat exchange tubes, and the solution flows inside the heat exchange tubes.

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