A waste heat recovery device for a reverberatory furnace

Abstract

This invention relates to the field of waste heat recovery and utilization technology in metallurgical furnaces and kilns, and proposes a waste heat recovery device for a reverberatory furnace. The device includes an exchange box and a mounting protrusion fixedly installed on one side of the exchange box. The exchange box contains a heating component for heating demineralized water. The heating component includes a heating water pipe fixedly installed inside the exchange box, with one end penetrating the exchange box and extending to the outside. An inlet pipe communicating with the inner cavity of the heating water pipe is fixedly installed at the bottom of the exchange box. Demineralized water flows inside the heating water pipe, and a heating water pipe is threaded around its exterior. This invention, through the heating component, converts heat from hot water into demineralized water, achieving heating of the demineralized water. This significantly reduces the amount of low-pressure steam required to heat the demineralized water to the set temperature and the heating time, allowing the saved steam to be used for waste heat power generation, thereby increasing power output and conserving energy.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and utilization technology in metallurgical furnaces and kilns, and particularly to a waste heat recovery device for a reverberatory furnace. Background Technology

[0002] The reverberatory furnace body has a feed inlet water jacket and a herringbone flue water jacket. The outlet water temperature of the circulating cooling water in these two parts can be adjusted by manually shutting off the inlet flow rate, reaching 70-80℃, and the water volume is very large, resulting in high thermal efficiency. Currently, the reverberatory furnace body water jackets use circulating cooling water for cooling, with hot water being cooled and recycled by a cooling fan, resulting in complete waste of resources as waste heat is not utilized. Therefore, we propose a waste heat recovery device for reverberatory furnaces. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing reverberatory furnaces where the heat in the circulating water is not fully utilized, and to propose a waste heat recovery device for reverberatory furnaces.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A waste heat recovery device for a reverberatory furnace includes an exchange box and a mounting protrusion fixedly installed on one side of the exchange box, wherein the exchange box is provided with a heating component for heating demineralized water.

[0006] The heating assembly includes a heating water pipe fixedly installed inside the heat exchange box. One end of the heating water pipe passes through the heat exchange box and extends to the outside of the heat exchange box. An inlet pipe communicating with the inner cavity of the heating water pipe is fixedly installed at the bottom of the heat exchange box. Demineralized water flows inside the heating water pipe, and a heating water pipe is threaded around the outside of the heating water pipe. Both ends of the heating water pipe pass through the heat exchange box to the outside of the heat exchange box, and circulating cooling water flows in the heating water pipe. An insulation layer for reducing heat loss is provided inside the heat exchange box and outside the heating water pipe.

[0007] Preferably, a partition plate is fixedly installed inside the heating water pipe.

[0008] Preferably, the outlet of the heated water pipe is connected to a measuring tube for measuring the temperature of the demineralized water.

[0009] Preferably, the insulation layer is filled with mineral wool.

[0010] Preferably, the upper and lower parts of the exchange box are respectively provided with pressure relief components communicating with the inner cavity of the exchange box. The pressure relief component includes a conical cavity opened inside the exchange box. A support frame is fixedly installed inside the conical cavity. A telescopic sleeve is fixedly installed on one side of the support frame. A telescopic slide rod is slidably installed inside the telescopic sleeve. A partition plate that fits against the inner wall of the conical cavity is fixedly installed at one end of the telescopic slide rod, and a telescopic spring that is fixedly connected to the telescopic sleeve is provided at the other end.

[0011] Preferably, the internal dimensions of the conical cavity decrease sequentially from top to bottom, and the variation pattern of the conical cavity dimensions in the two pressure relief assemblies is consistent.

[0012] Preferably, a filter screen for filtering dust is fixedly installed at the connection between the conical cavity and the outside.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This invention converts the heat in hot water into the demineralized water by setting up a heating component, thereby realizing the heating operation of the demineralized water. This significantly reduces the amount of low-pressure steam and heating time required to heat the low-pressure steam to the set temperature, allowing the saved steam to be used for waste heat power generation to increase power generation, thus saving energy.

[0015] 2. By setting up a partition plate, the present invention creates a U-shaped structure inside the heating water pipe, thereby extending the flow distance of the demineralized water in the heating water pipe, increasing the heating time of the demineralized water, and further improving the heating effect of the demineralized water. In addition, the setting of the measuring tube enables the equipment to monitor the temperature of the demineralized water, making it convenient for staff to record temperature data in real time. This data can be used for subsequent analysis and optimization, increasing energy utilization efficiency.

[0016] 3. The present invention, through the setting of the pressure relief component, allows the air to be vented outward when the air pressure in the exchange box is high, thus realizing the pressure relief operation, and allows the air to be drawn inward when the air pressure inside the exchange box is low, ensuring the normal progress of heat transfer. At the same time, the setting of the filter screen can effectively prevent external dust from entering the interior of the exchange box, thereby increasing the heating effect of the demineralized water. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a front sectional view of the present invention;

[0020] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the present invention viewed from below.

[0022] In the diagram: 1. Exchange box; 2. Heating component; 21. Heating water pipe; 22. Divider plate; 23. Inlet pipe; 24. Heating water pipe; 25. Insulation layer; 26. Measuring pipe; 27. Pressure relief component; 271. Conical cavity; 272. Support frame; 273. Telescopic sleeve; 274. Telescopic spring; 275. Filter screen; 276. Telescopic slide rod; 277. Divider plate; 3. Mounting protrusion. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0024] Reference Figures 1-4 A waste heat recovery device for a reverberatory furnace includes an exchange box 1 and a mounting protrusion 3 fixedly installed on one side of the exchange box 1. The exchange box 1 is equipped with a heating component 2 for heating demineralized water. When the device is in use, the exchange box 1 can be fixed in a designated position by the mounting protrusion 3. Then, hot water and demineralized water flow through the exchange box 1, and the heating component 2 in the exchange box 1 transfers the heat from the hot water to the demineralized water, heating the demineralized water to 60-70℃. Then, it is drained back to the demineralized water tank of the fuming furnace through a DN50 pipe, and pumped to the deaerator of the fuming furnace by a 7.5KW demineralized water pump. After the deaerator uses hot water at 60-70℃, the amount of low-pressure steam consumed and the heating time required to heat the low-pressure steam to 104℃ can be significantly reduced. The saved steam can be used for waste heat power generation to increase power generation.

[0025] The heating assembly 2 includes a heating water pipe 21 fixedly installed inside the heat exchange tank 1. One end of the heating water pipe 21 passes through the heat exchange tank 1 and extends to the outside of the heat exchange tank 1. A water inlet pipe 23 communicating with the inner cavity of the heating water pipe 21 is fixedly installed at the bottom of the heat exchange tank 1. Demineralized water flows inside the heating water pipe 21, and a heating water pipe 24 is threaded around the outside of the heating water pipe 21. Both ends of the heating water pipe 24 pass through the heat exchange tank 1 to the outside of the heat exchange tank 1, and circulating cooling water flows in the heating water pipe 24. An insulation layer 25 is provided inside the heat exchange tank 1 and outside the heating water pipe 21 to reduce heat loss. This embodiment uses... At the same time, the heating water pipe 21 and the hot water pipe 24 can be set so that both hot water and demineralized water can flow into the exchange tank 1. Since the hot water pipe 24 is spirally sleeved on the outside of the heating water pipe 21, the heat of the hot water in the hot water pipe 24 will be transferred to the demineralized water in the heating water pipe 21 under the physical law of heat transfer, so as to achieve the effect of heating the demineralized water. In addition, the insulation layer 25 set in the exchange tank 1 can effectively reduce the heat loss in the exchange tank 1 and keep the interior of the exchange tank 1 in a high-temperature environment, thereby improving the heating effect of the demineralized water and further saving the subsequent steam consumption.

[0026] A partition plate 22 is fixedly installed inside the heating water pipe 21, such as Figure 2 As shown, the partition plate 22 makes the interior of the heating water pipe 21 form a U-shaped structure, thereby extending the flow distance of the demineralized water in the heating water pipe 21, increasing the heating time of the demineralized water, and further improving the heating effect of the demineralized water.

[0027] The outlet of the heating water pipe 21 is connected to a measuring tube 26 for measuring the temperature of the demineralized water. The setting of the measuring tube enables the equipment to monitor the temperature of the demineralized water, making it convenient for staff to record temperature data in real time. This data can be used for subsequent analysis and optimization, helping to improve the process, improve product quality, or reduce production costs and increase energy efficiency.

[0028] The insulation layer 25 is filled with mineral wool, an essential insulating building material in industry and construction. Mineral wool and its products are lightweight, durable, non-flammable, non-corrosive, and resistant to insects, making them excellent thermal insulation and sound absorption materials. When filled into the insulation layer 25, it effectively reduces heat evaporation, ensuring a high-temperature environment in the exchange box 1 and enhancing the heating effect of the demineralized water. Example

[0029] Reference Figures 1-4This embodiment is basically the same as Embodiment 1, but with an optimization: the upper and lower parts of the exchange box 1 are respectively provided with pressure relief components 27 communicating with the inner cavity of the exchange box 25. The pressure relief component 27 includes a conical cavity 271 opened inside the exchange box 1. A support frame 272 is fixedly installed inside the conical cavity 271. A telescopic sleeve 273 is fixedly installed on one side of the support frame 272. A telescopic slide rod 276 is slidably installed inside the telescopic sleeve 273. A partition 277 that fits against the inner wall of the conical cavity 271 is fixedly installed at one end of the telescopic slide rod 276, and a telescopic spring 274 that is fixedly connected to the telescopic sleeve 273 is provided at the other end. The setting of the insulation layer 25 reduces the evaporation of heat in the exchange box 1 and improves the heat dissipation efficiency. According to the physical law of thermal expansion and contraction, the heat inside the exchange chamber 1 will heat the air inside the exchange chamber 1, causing the air to expand and thus increasing the air pressure inside the exchange chamber 1. In this embodiment, the pressure relief component 27 can be set to perform a pressure relief operation when the air pressure in the exchange chamber 1 rises, so as to avoid excessive air pressure and other accidents. The specific operation is as follows: when the air pressure inside the exchange chamber 1 is greater than the external atmospheric pressure and the elastic force of the extension spring 274, the partition 277 will move outward, and a gap will appear between it and the inner wall of the conical cavity 271. The expanded air in the exchange chamber 1 will flow out from the gap, achieving the pressure relief operation and reducing the probability of accidents.

[0030] The internal dimensions of the conical cavity 271 decrease sequentially from top to bottom, and the change pattern of the conical cavity 271 in the two pressure relief components 27 is consistent. After long-term pressure relief operation, the air content in the exchange box 1 will become lower and lower. This means that the number of gas molecules per unit volume decreases and the average distance between gas molecules increases. During the heating process, the motion state of gas molecules will change, and the speed of molecular motion will increase with the increase of temperature. However, in a low-pressure environment, due to the increased distance between molecules, the collision frequency between molecules will decrease, which may reduce the efficiency of heat conduction. As a result, the temperature in the exchange box 1 rises slowly, which in turn affects the heating of demineralized water. In this embodiment, by setting the change pattern of the conical cavity 271 in the two pressure relief components 27 to be consistent, when the gas pressure in the exchange box 1 is high, it can exhaust gas to the outside to realize the pressure relief operation, and when the gas pressure inside the exchange box 1 is low, it can draw air inward to ensure the normal progress of heat transfer.

[0031] A filter screen 275 for filtering dust is fixedly installed at the connection between the conical cavity 271 and the outside. When outside air enters the exchange box 1, it will carry in outside dust. Over time, the amount of dust in the exchange box 1 will increase. This dust will accumulate on the outside of the heating water pipe 21 and the heating water pipe 24, forming a heat insulation layer, thereby limiting the heat from evaporating from the heating water pipe 24 and affecting the rise of the demineralized water temperature. In this embodiment, by setting the filter screen 275 at one end of the conical cavity 271, it is possible to effectively prevent outside dust from entering the exchange box 1, thereby increasing the heating effect of the demineralized water.

[0032] Working principle

[0033] When using this device, the exchange box 1 can be fixed in a designated position by installing the protrusion 3. Then, hot water and demineralized water flow through the exchange box 1, and the heat in the hot water is transferred to the demineralized water by the heating component 2 set in the exchange box 1, so that the demineralized water is heated to 60-70℃. Then, it is drained back to the demineralized water tank of the fumigation furnace through a DN50 pipe.A 5KW demineralized water pump supplies water to the deaerator of the flue gas furnace. Using 60-70℃ hot water in the deaerator significantly reduces the amount of low-pressure steam and heating time required to heat the demineralized water to 104℃. The saved steam can be used for waste heat power generation to increase electricity output. During heating, because the heating water pipe 24 is spirally sleeved outside the heating water pipe 21, the heat from the hot water in the heating water pipe 24 is transferred to the demineralized water in the heating water pipe 21 according to the physical laws of heat transfer, achieving the effect of heating the demineralized water. Furthermore, the insulation layer 25 installed in the exchange box 1 effectively reduces heat loss from the exchange box 1, maintaining a higher temperature environment inside the exchange box 1, thereby improving the heating effect of the demineralized water and further saving subsequent steam consumption. The time-separation plate 22 creates a U-shaped structure inside the heating water pipe 21, extending the flow distance of the demineralized water within it and thus increasing the heating time. This further improves the heating effect of the demineralized water. The measuring pipe 26 at the outlet of the heating water pipe 21 allows the equipment to monitor the temperature of the demineralized water, facilitating real-time temperature data recording. This data can be used for subsequent analysis and optimization, helping to improve processes, enhance product quality, reduce production costs, and increase energy efficiency. The insulation layer 25 reduces heat evaporation from the exchange chamber 1 and increases its internal temperature. According to the physical law of thermal expansion and contraction, the heat inside the exchange chamber 1 will heat the air within it. This causes the air to expand due to heat, thereby increasing the air pressure in exchange chamber 1. In this design, the pressure relief component 27 allows for pressure relief when the air pressure in exchange chamber 1 rises, preventing excessive pressure and potential accidents. Specifically, when the internal air pressure of exchange chamber 1 exceeds the external atmospheric pressure and the elastic force of the extension spring 274, the partition 277 moves outward, creating a gap between it and the inner wall of the conical cavity 271. The expanded air in exchange chamber 1 then flows out through this gap, achieving pressure relief and reducing the probability of accidents. With prolonged pressure relief, the air content in exchange chamber 1 will decrease, meaning a reduction in the number of gas molecules per unit volume and an increase in the average distance between gas molecules. During the heating process… The motion of gas molecules changes; their speed increases with rising temperature. However, in low-pressure environments, the increased distance between molecules reduces the frequency of collisions, potentially lowering heat transfer efficiency and slowing the temperature rise in exchange chamber 1. This, in turn, affects the heating of the demineralized water. In this embodiment, by ensuring consistent dimensional changes in the conical cavities 271 of the two pressure relief components 27, high pressure in exchange chamber 1 allows for external exhaust and internal intake, ensuring normal heat transfer. The filter 275 at the conical cavity 271 effectively prevents external dust from entering the exchange chamber 1, thereby increasing the heating effect of the demineralized water.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste heat recovery device for a reverberatory furnace, comprising an exchange box (1) and a mounting protrusion (3) fixedly installed on one side of the exchange box (1), characterized in that: The exchange box (1) is equipped with a heating component (2) for heating the demineralized water. The heating component (2) includes a heating water pipe (21) fixedly installed inside the exchange box (1). One end of the heating water pipe (21) passes through the exchange box (1) and extends to the outside of the exchange box (1). A water inlet pipe (23) communicating with the inner cavity of the heating water pipe (21) is fixedly installed at the bottom of the exchange box (1). Demineralized water flows inside the heating water pipe (21), and a heating water pipe (24) is threaded around the outside of the heating water pipe (21). Both ends of the heating water pipe (24) pass through the exchange box (1) to the outside of the exchange box (1), and circulating cooling water flows in the heating water pipe (24). An insulation layer (25) for reducing heat loss is provided inside the exchange box (1) and outside the heating water pipe (21). The exchange box (1) is provided with pressure relief components (27) in the upper and lower parts respectively, which communicate with the inner cavity of the exchange box (1). The pressure relief component (27) includes a conical cavity (271) opened inside the exchange box (1). A support frame (272) is fixedly installed inside the conical cavity (271). A telescopic sleeve (273) is fixedly installed on one side of the support frame (272). A telescopic slide rod (276) is slidably installed inside the telescopic sleeve (273). One end of the telescopic slide rod (276) is fixedly installed with a partition plate (277) that fits against the inner wall of the conical cavity (271), and the other end is provided with a telescopic spring (274) that is fixedly connected to the telescopic sleeve (273).

2. The waste heat recovery device for a reverberatory furnace according to claim 1, characterized in that: A partition plate (22) is fixedly installed inside the heating water pipe (21).

3. The waste heat recovery device for a reverberatory furnace according to claim 1, characterized in that: The outlet of the heated water pipe (21) is connected to a measuring pipe (26) for measuring the temperature of the demineralized water.

4. A waste heat recovery device for a reverberatory furnace according to claim 1, characterized in that: The insulation layer (25) is filled with mineral wool.

5. A waste heat recovery device for a reverberatory furnace according to claim 1, characterized in that: The internal dimensions of the conical cavity (271) decrease sequentially from top to bottom, and the change pattern of the conical cavity (271) dimensions in the two pressure relief assemblies (27) is consistent.

6. A waste heat recovery device for a reverberatory furnace according to claim 1, characterized in that: A filter screen (275) for filtering dust is fixedly installed at the connection between the conical cavity (271) and the outside.

Images