Ultrahigh-temperature waste flue gas heat recovery system

Abstract

The utility model provides an ultra-high temperature waste flue gas heat recovery system, which belongs to the technical field of flue gas heat recovery, and comprises a heat recovery box, the heat recovery box consists of a heat exchange box and a heat dissipation box, and smoke guide pipes which are communicated with each other are arranged between the heat exchange box and the heat dissipation box; a heat exchange pipeline and a spraying pipeline are arranged at the two ends of the water path pipeline respectively, and spraying heads are installed at the bottom of the spraying pipeline at equal intervals; the flue gas pipeline is composed of a flue gas inlet pipe and a flue gas outlet pipe, and the flue gas inlet pipe and the flue gas outlet pipe are connected with the bottom of the heat exchange box and the top of the heat dissipation box respectively. According to the device, the heat recovery box is divided into the heat exchange box and the heat dissipation box, the heat recovery box can sequentially pass through the interiors of the heat exchange box and the heat dissipation box in cooperation with the design of the flue gas pipeline, most water sources are used for heat exchange, part of the water sources are used for spraying cooling through the design of the waterway pipeline, and after flue gas is subjected to heat exchange and heat dissipation, the cooling effect can be effectively achieved; the influence on the environment is prevented.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of flue gas heat recovery, and in particular to an ultra-high temperature waste flue gas heat recovery system. Background Art

[0002] At the chimney outlet of a power plant or a waste incineration plant, the temperature is generally very high. In order to reuse the heat, a flue gas waste heat recovery system is used to recover the heat.

[0003] The existing gas-fired heating boiler flue gas waste heat recovery system adopts a conventional flue gas waste heat recovery device. The boiler return water first enters the flue gas waste heat recovery device, absorbs the heat of the flue gas, and then enters the boiler to continue to rise in temperature. After reaching the required heating temperature, it supplies heat to the user. Although the flue gas waste heat recovery device is currently used, it only absorbs a small part of the heat in the flue gas, and the temperature of the flue gas is still very high. A large amount of flue gas is discharged into the atmosphere, and the waste heat of the flue gas also enters the atmosphere. A large amount of moisture in the flue gas also enters the atmosphere and mixes with the dust in the air, causing an impact on the environment. Utility Model Content

[0004] The utility model mainly provides an ultra-high temperature waste flue gas heat recovery system to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] An ultra-high temperature waste flue gas heat recovery system, comprising:

[0007] A heat recovery box, which is composed of a heat exchange box at the bottom and a heat dissipation box at the top. A smoke guide pipe that is interconnected is provided at one end between the heat exchange box and the heat dissipation box, and a drainage pipe is installed at the bottom of one side of the heat dissipation box;

[0008] A water pipeline, wherein the water pipeline is a three-way pipe structure, and the two ends of the water pipeline are respectively a heat exchange pipeline and a spray pipeline, a first solenoid valve is installed at the connection between the heat exchange pipeline and the spray pipeline, the heat exchange pipeline and the spray pipeline penetrate into the heat exchange box and the heat dissipation box, the heat exchange pipeline penetrates from one end of the heat exchange box, and spray heads are installed at equal distances at the bottom of the spray pipeline;

[0009] The flue gas duct is composed of a flue gas inlet pipe and a flue gas exhaust pipe, and the flue gas inlet pipe and the flue gas exhaust pipe are respectively connected to the bottom of the heat exchange box and the top of the heat dissipation box.

[0010] Furthermore, heat dissipation fins are embedded and installed on the inner walls of both sides of the heat dissipation box.

[0011] Furthermore, the heat exchange pipe is located inside the heat exchange box and has a spiral pipe structure.

[0012] Furthermore, the top of the smoke guide pipe is located in the inner top area of ​​the heat dissipation box, and a smoke exhaust notch is provided on the top of the side of the smoke guide pipe away from the spray pipe.

[0013] Furthermore, the inner wall of the bottom of the heat dissipation box is in a slope structure inclined toward one end of the drain pipe, and a second solenoid valve is installed on the drain pipe.

[0014] Furthermore, the smoke inlet pipe and the smoke exhaust pipe are both installed on a heat recovery box away from one end of the smoke guide pipe.

[0015] Furthermore, a temperature sensor is installed on one side of the flue gas exhaust pipe.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] This device divides the heat recovery box into two parts, a heat exchange box and a heat dissipation box. Because the flue gas flows upward, combined with the design of the flue gas pipeline, it can pass through the inside of the heat exchange box and the heat dissipation box in turn. Then, through the design of the water pipeline, most of the water source is used for heat exchange, and part of the water source is used for spraying and cooling. After the flue gas has undergone heat exchange and heat dissipation, the cooling effect can be effectively achieved, preventing impact on the environment and protecting the environment.

[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model from a first viewing angle;

[0021] Figure 3 It is a schematic diagram of the overall structure of the utility model from a second viewing angle.

[0022] In the figure: 10, heat recovery box; 11, heat exchange box; 12, heat dissipation box; 13, smoke guide pipe; 14, drain pipe; 15, smoke exhaust gap; 20, water pipe; 21, heat exchange pipe; 22, spray pipe; 23, spray head; 30, flue gas pipe; 31, flue gas inlet pipe; 32, flue gas exhaust pipe; 40, first solenoid valve; 50, heat dissipation fin; 60, temperature sensor; 70, second solenoid valve. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] For examples, please refer to the attached Figure 1-3 , an ultra-high temperature waste flue gas heat recovery system, comprising:

[0027] A heat recovery box 10, the heat recovery box 10 is composed of a heat exchange box 11 at the bottom and a heat dissipation box 12 at the top, a smoke guide pipe 13 that penetrates each other is arranged at one end between the heat exchange box 11 and the heat dissipation box 12, and a drainage pipe 14 is installed at the bottom of one side of the heat dissipation box 12;

[0028] A water pipe 20, the water pipe 20 is a three-way pipe structure, and the two ends of the water pipe 20 are respectively a heat exchange pipe 21 and a spray pipe 22, a first solenoid valve 40 is installed at the connection between the heat exchange pipe 21 and the spray pipe 22, the heat exchange pipe 21 and the spray pipe 22 penetrate into the heat exchange box 11 and the heat dissipation box 12, the heat exchange pipe 21 penetrates from one end of the heat exchange box 11, and a spray head 23 is installed at an equal distance at the bottom of the spray pipe 22;

[0029] The smoke duct 30 is composed of a smoke inlet pipe 31 and a smoke exhaust pipe 32 , and the smoke inlet pipe 31 and the smoke exhaust pipe 32 are connected to the bottom of the heat exchange box 11 and the top of the heat dissipation box 12 respectively.

[0030] It should be noted that the electrical components in this device are all electrically connected to a conventional PLC controller.

[0031] For details, please refer to the attached Figure 1 , heat dissipation fins 50 are embedded and installed on the inner walls of both sides of the heat dissipation box 12;

[0032] In this embodiment, it should be noted that heat can be conducted outwards through the heat dissipation fins 50 , thereby further facilitating heat dissipation of the heat dissipation box 12 .

[0033] For details, please refer to the attached Figure 2 , the heat exchange pipe 21 is located inside the heat exchange box 11 and has a spiral tube structure;

[0034] In this embodiment, it should be noted that the spiral tube structure of the heat exchange pipe 21 can allow the water to stay in the heat exchange box 11 for a longer time, thereby better achieving flue gas heat exchange and water heating.

[0035] For details, please refer to the attached Figure 3 The top of the smoke guide pipe 13 is located in the inner top area of ​​the heat dissipation box 12, and a smoke exhaust notch 15 is provided on the top of the smoke guide pipe 13 away from the spray pipe 22;

[0036] In this embodiment, it should be noted that the top horizontal plane height of the smoke guide pipe 13 is higher than the horizontal plane height of the spray pipe 22, thereby preventing the spray head 23 from spraying water into the smoke guide pipe 13, causing the water to enter the heat exchange box 11 and affect the heat exchange.

[0037] For details, please refer to the attached Figure 2 The bottom inner wall of the heat dissipation box 12 is in a slope structure inclined toward one end of the drain pipe 14, and a second solenoid valve 70 is installed on the drain pipe 14;

[0038] In this embodiment, it should be noted that the inclined structure at the bottom of the heat dissipation box 12 allows the water used for cooling and spraying to flow along the inclined surface to one end of the drain pipe 14, and then the sprayed water is discharged through the drain pipe 14. The drain pipe 14 can be indirectly opened through the second solenoid valve 70, thereby preventing smoke from escaping from the drain pipe 14.

[0039] For details, please refer to the attached Figure 2 and attached Figure 3 , the smoke inlet pipe 31 and the smoke exhaust pipe 32 are both installed on the heat recovery box 10 away from one end of the smoke guide pipe 13;

[0040] Furthermore, a temperature sensor 60 is installed on one side of the smoke exhaust pipe 32;

[0041] In this embodiment, it should be noted that the smoke inlet pipe 31 and the smoke exhaust pipe 32 are arranged on the opposite side of the smoke guide pipe 13, so that after the smoke enters the heat recovery box 10, it can completely pass through the heat exchange box 11 and the heat dissipation box 12 to complete effective heat exchange and heat dissipation; and the temperature sensor 60 can detect the smoke temperature at the smoke exhaust pipe 32. When the temperature does not reach the emission temperature standard, a subsequent cooling program can be prepared.

[0042] The specific operation mode of the utility model is as follows:

[0043] First, the water pipe 20 and the flue gas pipe 30 of the device are connected to the water source and the exhaust pipe of the gas heating boiler respectively. The flow rate of the first solenoid valve 40 is controlled by the controller to control the amount of water entering the spray pipe 22, so that the water source is divided into two parts, one part is used for heat exchange, and the other part is used for spraying. When the water source entering the heat exchange pipe 21 passes through the heat exchange box 11, the high-temperature flue gas exchanges heat with the water source in the pipe. The heated water source supplies heat to the user, and the water liquid entering the spray pipe 22 is sprayed through the spray head 23, thereby dissipating the heat of the flue gas inside the heat dissipation box 12. The flue gas is first heat exchanged and then dissipated, which can effectively reduce the temperature and is finally discharged from the flue gas exhaust pipe 32.

[0044] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An ultra-high temperature waste flue gas heat recovery system, characterized in that: include: A heat recovery box (10), the heat recovery box (10) being composed of a heat exchange box (11) at the bottom and a heat dissipation box (12) at the top, a smoke guide pipe (13) being arranged at one end between the heat exchange box (11) and the heat dissipation box (12), and a drainage pipe (14) being arranged at the bottom of one side of the heat dissipation box (12); A water pipeline (20), wherein the water pipeline (20) is a three-way pipe structure, and the two ends of the water pipeline (20) are respectively a heat exchange pipeline (21) and a spray pipeline (22), a first solenoid valve (40) is installed at the connection between the heat exchange pipeline (21) and the spray pipeline (22), the heat exchange pipeline (21) and the spray pipeline (22) penetrate into the heat exchange box (11) and the heat dissipation box (12), the heat exchange pipeline (21) penetrates from one end of the heat exchange box (11), and spray heads (23) are installed at equal distances at the bottom of the spray pipeline (22); A flue gas duct (30), the flue gas duct (30) consisting of a flue gas inlet pipe (31) and a flue gas exhaust pipe (32), the flue gas inlet pipe (31) and the flue gas exhaust pipe (32) being connected to the bottom of the heat exchange box (11) and the top of the heat dissipation box (12) respectively.

2. The ultra-high temperature waste flue gas heat recovery system according to claim 1, characterized in that: Heat dissipation fins (50) are inlaid and installed on the inner walls of both sides of the heat dissipation box (12).

3. The ultra-high temperature waste flue gas heat recovery system according to claim 1, characterized in that: The heat exchange pipe (21) is located inside the heat exchange box (11) and has a spiral pipe structure.

4. The ultra-high temperature waste flue gas heat recovery system according to claim 1, characterized in that: The top of the smoke guide pipe (13) is located in the inner top area of ​​the heat dissipation box (12), and a smoke exhaust notch (15) is provided on the top of the side of the smoke guide pipe (13) away from the spray pipe (22).

5. The ultra-high temperature waste flue gas heat recovery system according to claim 1, characterized in that: The inner wall of the bottom of the heat dissipation box (12) is in a slope structure inclined toward one end of the drainage pipe (14), and a second solenoid valve (70) is installed on the drainage pipe (14).

6. The ultra-high temperature waste flue gas heat recovery system according to claim 1, characterized in that: The smoke inlet pipe (31) and the smoke exhaust pipe (32) are both installed on the heat recovery box (10) away from one end of the smoke guide pipe (13).

7. The ultra-high temperature waste flue gas heat recovery system according to claim 6, characterized in that: A temperature sensor (60) is installed on one side of the smoke exhaust pipe (32).

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