CN221147305U

CN221147305U - Boiler smoke exhaust heat utilization heat storage device

Info

Publication number: CN221147305U
Application number: CN202322989196.9U
Authority: CN
Inventors: 普鸿; 白洋
Original assignee: China Energy Conservation Honghe Environmental Protection Energy Co ltd
Current assignee: China Energy Conservation Honghe Environmental Protection Energy Co ltd
Priority date: 2023-11-07
Filing date: 2023-11-07
Publication date: 2024-06-14
Anticipated expiration: 2033-11-07

Abstract

The utility model discloses a boiler smoke exhaust heat utilization and heat storage device which comprises a main body, an input pipeline, an output pipeline, a closed-circuit circulation system, a condenser, a distillation fan, a multi-stage heat exchanger and a radiator. The device carries out heat transfer through the multistage heat exchanger, can more fully utilize the heat energy in the flue gas, and reduces the heat emission. The cap circulation achieves more efficient heat transfer and storage through the circulating heat medium. Direct steam extraction avoids loss in the energy conversion process and improves the energy utilization efficiency. These methods contribute to sustainable development and environmental protection, providing a stable and reliable supply of thermal energy.

Description

Boiler smoke exhaust heat utilization heat storage device

Technical Field

The utility model relates to the field of heat energy utilization, in particular to a boiler smoke exhaust heat utilization heat storage device.

Background

A heat storage device for boiler exhaust gas heat utilization introduces a multi-stage heat exchanger, a closed-loop circulation system and a direct steam extraction technology, so that waste heat in the exhaust gas can be efficiently recycled. The multi-stage heat exchanger transfers heat to the flue gas in multiple stages, improving energy capture efficiency. The closed circulation system enables the heat medium to circulate in the device, so that more efficient heat transfer and storage are realized. The direct steam extraction technique utilizes a condenser to directly extract steam from the flue, avoiding unnecessary energy consumption. The device can be applied to the fields of industry, construction and the like, improves the energy utilization efficiency and reduces the energy waste. The existing flue gas waste heat and condensed water recycling system (publication number: CN 210861049U) of the gas-fired boiler has some defects and needs to be further improved.

1. The traditional product only uses a simple heat exchanger, has low heat transfer efficiency, and can not effectively capture the high-temperature heat energy in the flue gas. In addition, conventional products are generally not provided with closed cycle systems and direct steam extraction techniques which can effectively improve heat storage and recovery efficiency, so there is an urgent need for a thermal storage device having a multi-stage heat exchanger.

2. Conventional heat exchanger systems typically do not have a closed loop system, which results in the heat medium being expelled only once for heat transfer and not recycled. The lack of a closed loop system makes the transfer and storage of thermal energy from conventional products less efficient. In addition, because the heat medium cannot flow circularly, the traditional product is easy to lose heat and fluctuate in temperature in the heat storage process, and the integral heat energy utilization effect is affected. The closed cycle system can solve the problems, and enable the heat medium to continuously circulate in the heat storage device, so that the efficiency of heat energy transfer and storage is improved, and meanwhile, the waste of energy sources and the increase of cost are reduced. There is an urgent need for a thermal storage device having a cover circulation system.

3. Conventional products require additional equipment and steps in the steam extraction process, such as fuel combustion, hot water recycling, etc., which consume unnecessary energy. Meanwhile, the conventional products have low heat energy utilization efficiency due to the heat conversion process, and the combustion of fuel may also generate some pollutants. There is an urgent need for a thermal storage device with direct distillation extraction.

Disclosure of utility model

The utility model mainly aims to provide a boiler smoke exhaust heat utilization heat storage device which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a boiler heat utilization heat accumulation device that discharges fume, input pipeline is installed to main part one side, output pipeline is installed to main part one side, closed circuit circulation system is installed to output pipeline one end, the radiator is installed to closed circuit circulation system top, the condenser is installed to output pipeline one end, the distillation fan is installed to the condenser below, multistage heat exchanger is installed to output pipeline one end.

Preferably, the output conduit passes entirely through the condenser.

Preferably, the radiator is designed on the surface of the closed circulation system in a matrix mode.

Preferably, the multi-stage heat exchanger is composed of three stages in the middle of the output pipeline.

Preferably, the inside of the multi-heat-stage exchanger adopts a uniformly distributed connection mode.

Preferably, a protection net is arranged outside the distillation fan.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model carries out heat transfer on the flue gas in a plurality of heat exchange stages through the multistage heat exchanger, so that the heat energy in the flue gas can be more fully utilized and captured. The heat recovery rate can be greatly improved through multistage heat transfer, and the energy waste is reduced. Since the multistage heat exchanger can more effectively recover heat energy, the overall energy utilization efficiency can be improved. But also can effectively reduce the heat emission in the flue gas and reduce the pollutant emission generated in the combustion process. The multistage heat exchanger has less negative influence on the environment by improving the energy utilization efficiency and reducing the energy waste, and contributes to sustainable development and environmental protection.

2. The present utility model can achieve more efficient heat transfer by circulating the thermal medium in the thermal storage device through the cap circulation. The thermal medium is in continuous contact with the thermal storage device in the cycle, absorbing and releasing heat, thereby achieving a more efficient transfer of thermal energy. More thermal energy can also be stored in the thermal storage device by circulating the heat medium. The thermal medium may store excess heat during the cycle to release thermal energy when needed. The characteristic of stronger heat storage capacity can meet the requirement on heat energy storage, and more stable and reliable heat energy supply is provided.

3. The utility model can directly extract steam in the flue through direct steam extraction, thereby avoiding energy loss in the energy conversion process, reducing unnecessary energy consumption and saving energy. Steam can be extracted from the flue rapidly and efficiently, and multiple energy conversions in the traditional mode are avoided. Therefore, the energy utilization efficiency and the system operation efficiency can be improved, the waste of heat energy is reduced, and the steam requirement can be met more rapidly. In addition, since the directly extracted steam contains fewer pollutants, environmental pollution and influence on air quality can be reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a detailed view of the overall construction of the present utility model;

FIG. 3 is a schematic view of a condenser according to the present utility model.

In the figure: 1. a main body; 2. an input pipe; 3. an output pipe; 4. a closed-loop circulation system; 5. a condenser; 6. a distillation fan; 7. a multi-stage heat exchanger; 8. a heat sink.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1-3, the present utility model provides a technical solution:

The utility model provides a boiler exhaust gas heat utilizes heat accumulation device, input pipeline 2 is installed to main part 1 one side, output pipeline 3 is installed to main part 1 one side, closed circulation system 4 is installed to output pipeline 3 one end, radiator 8 is installed to closed circulation system 4 top, condenser 5 is installed to output pipeline 3 one end, distillation fan 6 is installed to condenser 5 below, multistage heat exchanger 7 is installed to output pipeline 3 one end.

In this embodiment, first, the flue gas is generated from the combustion process and enters the heat exchanger of the first heat exchange stage to exchange heat with the conductive medium. At this stage, the high temperature heat in the flue gas is conducted into the conductive medium, while the temperature of the conductive medium increases. Then, the flue gas after passing through the first heat exchange stage enters a heat exchanger of the second heat exchange stage. At this stage, the flue gas exchanges heat with another conductive medium, again transferring part of the heat energy. This process will further increase the temperature of the conductive medium. Next, through a plurality of similar heat exchange stages, the flue gas exchanges heat with the conductive medium in each stage, gradually reduces the temperature, and transfers heat to the conductive medium. Finally, after the flue gas is subjected to multi-stage heat exchange, the temperature is obviously reduced, and a large amount of heat is obtained by the conductive medium. These conductive media may be used to provide hot water, steam, or other forms of thermal energy to meet different energy demands. It should be noted that the heat efficiency of the multi-stage heat exchanger gas boiler is 92%, whereas the heat efficiency of the conventional gas boiler is only 85%, and the NOx emission is 50% lower than that of the conventional gas boiler, which is made of cast iron material.

In this embodiment, first, the heat medium circulates in the heat storage device. The heat medium absorbs heat and heats up through contact with the heat storage device. In this process, the amount of heat that the thermal medium may absorb depends on the design and capacity of the thermal storage device. Subsequently, the heated heating medium enters a heat storage part in the system to store redundant heat. The heat storage section may be a specific container or material for storing heat in the heat medium. The stored thermal energy may be released from the thermal storage section when needed. And then, the heat medium after the heat storage link reenters the circulating system and continues circulating flow. In this way, the thermal medium is constantly circulated, transferring heat between the thermal storage device and the thermal storage. Can be improved by about 15-20% compared with the traditional system, and the technology can store 50-100% more heat energy than the traditional system in the aspect of heat energy storage.

In this embodiment, first, the high temperature flue gas in the flue enters the condenser. The condenser is a device that facilitates the condensation of steam by reducing the flue gas temperature. In the condenser, heat in the flue gas is transferred to a cooling medium (such as cold water or cold air) by heat exchange with the flue gas, thereby reducing the temperature of the flue gas. In this process, the thermal energy in the steam is converted into a liquid state, forming condensed water. Subsequently, the condensed water is collected and further utilized. The condensed water may be fed into a steam generator or other device requiring steam to meet the steam demand. By the method, steam is directly extracted from the flue, multiple energy conversions in the traditional mode are avoided, and the energy utilization efficiency of the system is improved. It should be noted that the present technology can achieve higher steam extraction efficiency, typically around 80-90%. This means that the amount of steam extracted from the flue is high relative to the total amount of steam.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a boiler exhaust gas heat utilizes heat accumulation device, includes main part (1), characterized by: the utility model discloses a solar energy heat collector, including main part (1), closed circulation system (4), condenser (5) are installed to closed circulation system (4) top, condenser (5) are installed to output pipeline (3) one end, distillation fan (6) are installed to condenser (5) below, multistage heat exchanger (7) are installed to output pipeline (3) one end.

2. The boiler exhaust heat utilization heat storage device according to claim 1, characterized in that: the output pipe (3) passes through the condenser (5) entirely.

3. The boiler exhaust heat utilization heat storage device according to claim 1, characterized in that: the radiator (8) is designed on the surface of the closed circulation system (4) in a matrix mode.

4. The boiler exhaust heat utilization heat storage device according to claim 1, characterized in that: the multistage heat exchanger (7) consists of three stages in the middle of the output pipeline (3).

5. The boiler exhaust heat utilization heat storage device according to claim 1, wherein: the inside of the multistage heat exchanger (7) adopts a uniformly distributed connection mode.

6. The boiler exhaust heat utilization heat storage device according to claim 1, characterized in that: a protection net is arranged outside the distillation fan (6).