CN210486040U - Combustion heat exchange equipment - Google Patents

Abstract

The utility model discloses a burning indirect heating equipment. This burning indirect heating equipment includes: the multi-stage heat exchangers are connected in series with each other to form a heat exchange flow path inside the multi-stage heat exchangers; a catalytic combustor radiating the heat exchanger with heat generated by catalytic combustion. According to the utility model discloses a burning indirect heating equipment adopts flameless catalytic combustion mode, and the gas can the fully reaction burning, from the harmful gas that the source control burning produced to flameless burning is soft steady, and the noise is low, through the multistage heat exchanger of establishing ties each other, can improve heat exchanger heat exchange efficiency, reduces the time of heating water.

Description

Combustion heat exchange equipment

Technical Field

The utility model relates to a water heater field particularly, relates to a burning indirect heating equipment.

Background

A combustion heat exchange device (taking a gas water heater as an example) is a device for heating cold water by burning gas. The main combustion mode adopted by most gas water heaters is flame combustion, and the combustion completeness and temperature are different due to the contact difference between different combustion parts and air in the flame combustion mode. The high temperature zone causes the reaction of oxygen and nitrogen in the air to generate nitrogen oxide pollutants due to high temperature; in the low-temperature region, harmful substances such as carbon monoxide, hydrocarbon, tar and the like are generated due to incomplete combustion, pollutants in smoke generated by combustion harm personal safety and pollute the environment, and meanwhile, flame combustion noise is large, so that the comfort of users is influenced.

The existing methods for controlling the combustion to generate harmful gases mainly comprise the following steps: the thick and thin combustion technology and the catalytic degradation of carbon monoxide are adopted, but the thick and thin combustion mode can only effectively reduce the emission of nitrogen oxides and can not reduce the emission of carbon monoxide; after the flue gas is generated by combustion, carbon monoxide is reduced in a catalytic degradation mode, and meanwhile, the increase of nitrogen oxides can be caused, and a follow-up catalytic degradation method is a remedial measure which is generated and then eliminated, and cannot be controlled from the source. Therefore, the adoption of a safe and environment-friendly combustion mode with high combustion efficiency becomes the direction of the technical development of the gas water heater.

In addition, when the user uses the gas heater, when the water is shut off midway, the waste heat in the heat exchanger can continue to heat the hot water in the heat exchange pipe, the water temperature can be higher than the temperature set by the user, and when the user opens the water outlet again, the high-temperature hot water can scald the user easily.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a burning indirect heating equipment can improve combustion efficiency.

According to the utility model discloses burning indirect heating equipment includes: the multi-stage heat exchangers are connected in series with each other to form a heat exchange flow path inside the multi-stage heat exchangers; a catalytic combustor radiating the heat exchanger with heat generated by catalytic combustion.

According to the utility model discloses a burning indirect heating equipment adopts flameless catalytic combustion mode, and the gas can the fully reaction burning, from the harmful gas that the source control burning produced to flameless burning is soft steady, and the noise is low, through the multistage heat exchanger of establishing ties each other, can improve heat exchanger heat exchange efficiency, reduces the time of heating water.

According to some embodiments of the utility model, the burning indirect heating equipment still includes: a bypass pipe connected between the inlet pipe and the outlet pipe.

Further, a bypass control valve is arranged on the bypass pipe.

Further, the combustion heat exchange equipment also comprises: and the water inlet control valve is arranged on the water inlet pipe and used for adjusting the water flow of the heat exchange flow path.

Further, the bypass pipe is connected between the water inlet end of the water inlet control valve and the water outlet pipe.

Further, a temperature sensor is arranged on the water outlet pipe and is positioned at the downstream of the water outlet end of the bypass pipe.

According to some embodiments of the present invention, the outlet pipe comprises: the heat exchanger comprises a hot water pipe section and a water outlet interface section, wherein the hot water pipe section is connected with the last stage of heat exchanger, and a water storage tank is arranged between the hot water pipe section and the water outlet interface section.

Further, the combustion heat exchange device comprises: and the temperature sensor is arranged on the water outlet interface section and used for detecting the water temperature of the heat exchange flow path.

Further, burning indirect heating equipment, its characterized in that still includes: the preheating burner 7 is arranged opposite to the catalytic burner, and the preheating burner 7 is used for heating the catalytic burner.

According to some embodiments of the invention, the first order heat exchanger is located below the last order heat exchanger.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a cross-sectional view of a combustion heat exchange apparatus;

FIG. 2 is a cross-sectional view of a combustion heat exchange apparatus having a bypass pipe;

FIG. 3 is a cross-sectional view of a combustion heat exchange unit having a water storage tank.

Reference numerals:

the device comprises a premixing cavity 1, an air inlet cavity 11, an air inlet 111, an air mixing cavity 12, an air inlet pipe 2, a fuel gas proportional valve 21, a heat exchange cavity 3, an ignition and feedback integrated device 31, a first temperature sensor 32, an observation window 33, a feedback device 34, a preheating burner 41, a catalytic burner 42, a fan assembly 5, a fan 51, a smoke collection cover 52, an air inlet pipe 6, an air inlet control valve 61, an air outlet pipe 7, a temperature sensor 71, a hot water pipe section 72, an air outlet interface section 73, a water storage tank 74, a controller 8, a bypass pipe 9, a bypass control valve 91 and combustion heat exchange equipment 10.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The combustion heat exchange device according to the embodiment of the present invention is described in detail below with reference to fig. 1 to 3.

Referring to fig. 1, a combustion heat exchange apparatus 10 includes: multi-stage heat exchanger, catalytic burner 42.

The first-stage heat exchanger of the multi-stage heat exchanger is connected with a water inlet pipe 6, the last-stage heat exchanger of the multi-stage heat exchanger is connected with a water outlet pipe 7, and the multi-stage heat exchangers are connected in series with each other to form a heat exchange flow path inside the multi-stage heat exchanger.

In the example of fig. 1-3, the multi-stage heat exchanger is two heat exchangers, the two heat exchangers being a first stage heat exchanger and a second stage heat exchanger, respectively, the multi-stage heat exchanger facilitates installation and replacement of the catalytic burner 42, and can increase the amount of water in the heat exchange flow path to enhance the hot water supply capacity of the combustion heat exchange device 10. In the combustion heat exchange device 10, the first stage heat exchanger may be made of stainless steel, and a heat exchange waterway structure for passing water is provided around the first stage heat exchanger, and a plurality of pipes for supporting the catalytic combustor 42 are provided in the middle of the first stage heat exchanger. The second-stage heat exchanger can be made of stainless steel, heat exchange fins are embedded in the second-stage heat exchanger, the heat exchange area can be increased through the fins, and therefore the heat exchange efficiency of the heat exchanger can be improved.

The first-stage heat exchanger and the second-stage heat exchanger form a heat exchange flow path in series through an internal pipeline, so that the flow of water in the heat exchange flow path in unit time can be improved, and the speed of outputting hot water by the combustion heat exchange device 10 can be improved.

The flowing water in the heat exchange flow path can absorb and take away the high-temperature heat released by the catalytic combustor 42 during combustion in time, so that the deformation of the water pipe and the heat exchanger shell due to overhigh heated temperature is avoided, and the heated cold water flows out from the water outlet pipe 7 connected with the second-stage heat exchanger, thereby meeting the purpose of using hot water by a user.

The catalytic combustor 42 radiates the heat exchanger using heat generated by catalytic combustion.

Optionally, the catalytic burner 42 is disposed between two adjacent heat exchangers of the multi-stage heat exchanger, so that heat generated by catalytic combustion can be radiated to the heat exchanger better, the catalytic burner 42 is an irregular porous square block formed by stacking ceramic ribs, the surface of the square block is coated with a catalyst, the catalyst disposed on the square block can reduce the light-off temperature of fuel and deepen the oxidation degree of the square block, organic matters are combusted without flame at a lower light-off temperature, harmful gases generated when the fuel is lit off are reduced, and heat radiation is released, so that the heat exchanger is heated. The gas and air can be enriched on the surface of the catalyst, the reaction rate is improved, the utilization rate of the fuel is improved, the catalyst on the catalytic combustor 42 can effectively inhibit the generation of nitrogen oxides, and meanwhile, the catalyst can ensure that the catalytic combustion of the gas is complete, reduce the content of carbon monoxide in the flue gas and further effectively reduce the emission of harmful gases. Due to flameless combustion, the combustion reaction is soft and stable, and the combustion noise of the combustion heat exchange device 10 is reduced, so that the noise generated when the combustion heat exchange device 10 operates is lower.

The combustion heat exchange device 10 may further include: fan subassembly 5, heat exchange cavity 3, premix cavity 1, intake pipe 2, controller 8.

The fan assembly 5 includes: fan 51 and collection petticoat pipe 52, fan subassembly 5 can set up at the top of burning indirect heating equipment 10, has stronger exhaust fume ability, and fan 51 provides the suction to the flue gas in the heat transfer cavity 3, and fan 51 can be discharged the flue gas to outdoor, can also inhale the combustion chamber with fresh air and gas, and fan 51 still is connected with controller 8, and the adjustable fan 51 rotational speed of controller 8 is in order to change the suction size. The smoke collecting hood 52 below the fan 51 provides a flow guiding effect for smoke, and the smoke discharging efficiency of the fan 51 is improved. The fan assembly 5 can accelerate the combustion heat exchange device 10 to discharge smoke, and combustion efficiency is improved.

Have the heat transfer chamber in heat transfer cavity 3, heat exchanger and catalytic combustor 42 set up in the heat transfer intracavity, and the heat transfer intracavity can also be provided with: ignition feedback integrated device 31, first temperature sensor 32, observation window 33 and feedback device 34.

The ignition feedback integrated device 31 is used for igniting the preheating burner 41; the first temperature sensor 32 is used to detect the temperature of the preheat burner 41; the feedback device 34 is used for detecting the reaction state of the catalytic combustor 42; the observation window 33 is used for observing the combustion state in the heat exchange chamber.

The premixing chamber 1 is used for mixing air and gas, and the preheating burner 41 is disposed at the air outlet side of the premixing chamber 1. Premix chamber 1 includes: the gas mixing device comprises a gas inlet cavity 11 and a gas mixing cavity 12, wherein the gas inlet cavity 11 is provided with an air inlet 111, combustion-supporting gas such as air enters the gas inlet cavity 11 through the air inlet 111, and the air inlet 111 is provided with a structure for preventing gas from diffusing outwards, so that the use safety is ensured. The air inlet 111 has a connector (not shown in the figure) communicated with the air inlet pipe 2, the fuel gas enters the air inlet cavity 11 through the connector, the air and the fuel gas enter the gas mixing cavity 12 together, the gas mixing cavity 12 is communicated with the air inlet cavity 11, and the gas mixing cavity 12 is internally provided with a turbulent air distribution net plate which is used for further uniformly mixing the air and the fuel gas and uniformly distributing the mixed air-fuel gas to the preheating burner 41 and the catalytic burner 42 so as to uniformly combust the fuel gas. Alternatively, the axes of the connection port and the air inlet 111 may be orthogonal, so that the gas entering from the connection port and the air entering from the air inlet 111 may collide and mix initially, which is beneficial to improving the mixing uniformity of the gas and the air.

The gas inlet pipe 2 is provided with a gas proportional valve 21, and the gas quantity required by combustion can be controlled and adjusted by adjusting the valve size of the gas proportional valve 21.

The controller 8 is a device for receiving and processing signals and sending action instructions, the control center of the combustion heat exchange equipment 10 is connected with the control detection devices such as the gas proportional valve 21, the ignition and feedback integrated device 31, the first temperature sensor 32 and the feedback device 34, the control detection devices can feed sensed information back to the controller 8, and the controller 8 can send adjustment instructions according to the information fed back by the control detection devices, so that the working state of the control detection devices is changed, and the combustion heat exchange equipment 10 is further ensured to be in a good working state. For example: the controller 8 can control the gas proportional valve 21 to change the gas intake amount according to the temperature of the preheating burner 41 fed back by the first temperature sensor 32, so as to achieve the purpose of controlling the temperature of the preheating burner 41 at the set value.

According to the utility model discloses a burning indirect heating equipment 10 adopts flameless catalytic combustion mode, and the gas can the fully reaction burning, from the harmful gas that the source control burning produced to flameless burning is soft steady, and the noise is low, through the multistage heat exchanger of establishing ties each other, can improve heat exchanger heat exchange efficiency, reduces the time of heating water.

Referring to fig. 2, in an embodiment of the present invention, the combustion heat exchange device 10 further includes: and a bypass pipe 9, wherein the bypass pipe 9 is connected between the water inlet pipe 6 and the water outlet pipe 7.

When a user uses the combustion heat exchange device 10 and turns off water halfway, the waste heat in the heat exchanger can continue to heat the hot water in the heat exchange pipe, the water temperature can be higher than the temperature set by the user, when the user opens the water outlet again, the high-temperature hot water can easily scald the user, the bypass pipe 9 can directly flow the cold water in the water inlet pipe 6 into the water outlet pipe 7, the running water in the bypass pipe 9 can neutralize the high-temperature hot water, and the finally flowing hot water is still the water temperature set by the user.

The bypass pipe 9 is provided with a bypass control valve 91, the bypass control valve 91 is further connected with the controller 8, and the controller 8 can control the water flow in the bypass pipe 9 through the bypass control valve 91, so that the finally flowing hot water still has the water temperature set by the user.

The combustion heat exchange device 10 further comprises: and the water inlet control valve 61 is arranged on the water inlet pipe 6, and is used for adjusting the water flow of the heat exchange flow path.

The water inlet control valve 61 is further connected to the controller 8, and the controller 8 can adjust the amount of the inlet water through the water inlet control valve 61, so as to control the outlet water temperature of the outlet pipe 7, specifically, increasing the amount of the inlet water can reduce the outlet water temperature of the outlet pipe 7, and decreasing the amount of the inlet water can increase the outlet water temperature of the outlet pipe 7.

Referring to fig. 2, a bypass pipe 9 is connected between the water inlet end of the water inlet control valve 61 and the water outlet pipe 7.

The water inlet end of the water inlet control valve 61 is unheated cold water, and the water inlet amount of the bypass pipe 9 is not influenced by the opening and closing of the water inlet control valve 61, so that the phenomenon that a bypass branch flows into no water due to the closing of the water inlet control valve 61 is avoided.

The combustion heat exchange device 10 further comprises: and a temperature sensor 71, wherein the temperature sensor 71 is arranged on the water outlet pipe 7 and is positioned at the downstream of the water outlet end of the bypass pipe 9.

The temperature sensor 71 can be connected with the controller 8 through an electric connection line, and can transmit a water temperature signal obtained by mixing water in the water outlet pipe 7 and water in the bypass pipe 9 to the controller 8 to serve as a judgment basis for adjusting the gas quantity, the water inlet quantity and the bypass valve water quantity, specifically, increasing the bypass valve water quantity can reduce the water outlet temperature of the water outlet pipe 7, and decreasing the bypass valve water quantity can increase the water outlet temperature of the water outlet pipe 7; the water inlet quantity is increased, so that the water outlet temperature of the water outlet pipe 7 can be reduced, and the water outlet temperature of the water outlet pipe 7 can be increased by reducing the water inlet quantity; the water outlet temperature of the water outlet pipe 7 can be increased by increasing the gas quantity, and the water outlet temperature of the water outlet pipe 7 can be reduced by reducing the gas quantity. Preferably, the outlet water temperature can be quickly adjusted by adjusting the bypass valve water amount.

Referring to fig. 3, in another embodiment of the present invention, the outlet pipe 7 includes: a hot water pipe section 72 and a water outlet interface section 73, wherein the hot water pipe section 72 is connected with the last stage heat exchanger, and a water storage tank 74 is arranged between the hot water pipe section 72 and the water outlet interface section 73.

The water storage tank 74 can store a certain amount of water flowing into the hot water pipe section 72, the water temperature of the hot water pipe section 72 is higher than that of the water outlet interface section 73, hot water of the hot water pipe section 72 firstly enters the water storage tank 74, so that the water temperature is favorably buffered, the hot water of the hot water pipe section 72 is neutralized with the water in the water storage tank 74 and then flows out through the water outlet interface section 73, the water outlet temperature is more constant, and the water temperature of the water outlet interface section 73 is the temperature set by a user.

The combustion heat exchange device 10 further comprises: a temperature sensor 71, the temperature sensor 71 being provided on the outlet water interface section 73 for detecting the outlet water temperature.

The temperature sensor 71 can be connected with the controller 8 through an electric connection line, and can transmit a water temperature signal obtained by mixing water in the water outlet pipe 7 and water in the water storage tank 74 to the controller 8 to serve as a judgment basis for adjusting the gas quantity and the water inlet quantity, specifically, increasing the water inlet quantity can reduce the water outlet temperature of the water outlet pipe 7, decreasing the water inlet quantity can increase the water outlet temperature of the water outlet pipe 7; the water outlet temperature of the water outlet pipe 7 can be increased by increasing the gas quantity, and the water outlet temperature of the water outlet pipe 7 can be reduced by reducing the gas quantity.

In some embodiments, such as the embodiments illustrated in fig. 1-3, the combustion heat exchange device 10 further comprises: a preheating burner 41, the preheating burner 41 being arranged opposite the catalytic burner 42, the preheating burner 41 being adapted to heat the catalytic burner 42 such that the catalytic burner 42 is within a suitable operating temperature range.

The mixture of air and fuel gas is ignited by the ignition and feedback integrated device 31 installed near the preheating burner 41, heat is released, the upper catalytic burner 42 is preheated, and when the catalytic burner 42 reaches a certain temperature, the open flame on the preheating burner 41 is extinguished and converted into flameless combustion on the catalytic burner 42.

The first stage heat exchanger is positioned below the last stage heat exchanger.

Multistage heat exchanger is by supreme setting down, and the first order heat exchanger is located the below, and the last level heat exchanger is located the top to be favorable to water to flow to the last level heat exchanger by the first order heat exchanger under hydraulic effect, can make water be full of whole heat transfer flow path, effectively avoided the heat transfer flow path in the water cutoff lead to the condition of the too high damage of heat exchanger temperature, and can improve the dwell time of water in the heat transfer flow path, improve heat exchange efficiency.

Referring to fig. 1-3, in some embodiments of the present invention, the combustion heat exchange device 10 includes an air inlet cavity 11, an air mixing cavity 12, a first-stage heat exchanger, a second-stage heat exchanger, and a fan assembly 5, which are sequentially connected from bottom to top, water is introduced through an inlet pipe 6, and flows out through an outlet pipe 7 after being heated by the first-stage heat exchanger and the second-stage heat exchanger, and optionally, a bypass pipe 9 or a water storage tank 74 is added at the outlet pipe 7 to synthesize water temperature. A preheating burner 41 is arranged at the joint of the gas mixing cavity 12 and the first-stage heat exchanger, and a catalytic burner 42 is arranged at the joint of the first-stage heat exchanger and the second-stage heat exchanger. Other configurations for the combustion heat exchange apparatus 10 are well known to those skilled in the art and therefore will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A combustion heat exchange device, comprising:

the multi-stage heat exchangers are connected in series with each other to form a heat exchange flow path inside the multi-stage heat exchangers;

a catalytic combustor radiating the heat exchanger with heat generated by catalytic combustion.

2. The combustion heat exchange device of claim 1, further comprising: a bypass pipe connected between the inlet pipe and the outlet pipe.

3. The combustion heat exchange device of claim 2, wherein a bypass control valve is provided on the bypass pipe.

4. The combustion heat exchange device of claim 2, further comprising: and the water inlet control valve is arranged on the water inlet pipe and used for adjusting the water flow of the heat exchange flow path.

5. The combustion heat exchange device of claim 4, wherein the bypass pipe is connected between the water inlet end of the water inlet control valve and the water outlet pipe.

6. The combustion heat exchange device of claim 2, further comprising: and the temperature sensor is arranged on the water outlet pipe and is positioned at the downstream of the water outlet end of the bypass pipe.

7. The combustion heat exchange device of claim 1, wherein the water outlet pipe comprises: the heat exchanger comprises a hot water pipe section and a water outlet interface section, wherein the hot water pipe section is connected with the last stage of heat exchanger, and a water storage tank is arranged between the hot water pipe section and the water outlet interface section.

8. The combustion heat exchange device of claim 7, further comprising: and the temperature sensor is arranged on the water outlet interface section and used for detecting the water temperature of the heat exchange flow path.

9. The combustion heat exchange device of claim 1, further comprising: a preheating burner disposed opposite the catalytic burner, the preheating burner for heating the catalytic burner.

10. The combustion heat exchange device of claim 1, wherein the first stage heat exchanger is located below the last stage heat exchanger.

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