High-efficiency waste heat boiler for a grate cooler

Abstract

The utility model discloses a kind of high-efficiency waste heat boilers for grate cooler, it is related to waste heat boiler technical field, including grate cooler ontology, the boiler shell is arranged outside grate cooler ontology, economizer, evaporator and superheater are sequentially arranged in the inside of the boiler shell, the inside of the boiler shell is provided with purging assembly.The high-efficiency waste heat boiler for grate cooler is moved seat by setting up elastic support structure, slide bar, telescopic link and spring, the dynamic buffering protection of high-temperature thermocouple is realized, when flue gas impact, thermocouple drives mobile seat to slide along slide bar and extrude telescopic link, impact force is absorbed by the elastic deformation of spring, effectively reduce the direct wear of soot particle to thermocouple, prolong its service life, ensure thermocouple stable temperature measurement under complex working condition simultaneously, avoid excessive evaporation or waste heat waste due to temperature measurement failure, improve waste heat recovery efficiency and boiler operation safety, significantly reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boiler technology, specifically a high-efficiency waste heat boiler for grate coolers. Background Technology

[0002] High-efficiency waste heat boilers for grate coolers are key equipment in industries such as steel and cement for achieving cascaded energy utilization and environmentally friendly production. These boilers recover the waste heat from the high-temperature exhaust gas discharged from the grate cooler, heating water and converting it into steam or hot water for process heating, power generation, or heating. Taking the steel industry as an example, high-temperature steel slag releases a large amount of heat when cooled by the grate cooler; the high-efficiency waste heat boiler can convert this heat into saturated steam at 0.8–1.2 MPa. A single unit can generate tens of millions of kilowatt-hours of electricity annually, while simultaneously reducing CO2 emissions by over ten thousand tons. The design employs a dual-pressure or multi-pressure steam-water system, combined with nano-coated heat exchange tubes and heat pipe technology, to enhance heat transfer efficiency and reduce the risk of ash accumulation. The intelligent control system monitors the temperature distribution of steel slag in real time and dynamically adjusts the cooling air volume and conveying speed, enabling the waste heat recovery rate to exceed 40%. In addition, the boiler also has the functions of segmented air supply and grate plate modification, which increases the secondary air temperature to over 1000℃ by extending the residence time of steel slag, further optimizing heat energy utilization. Its application not only significantly reduces the energy consumption cost of enterprises, but also promotes industrial production towards the goal of zero carbon.

[0003] In the existing technology of high-efficiency waste heat boilers for grate coolers, the thermocouples are easily affected by smoke and dust during temperature measurement in the economizer, evaporator, and superheater, leading to a decrease in temperature measurement accuracy. Smoke and dust adhere to the surface of the thermocouples, forming an insulating layer that hinders heat transfer. At the same time, the exhaust smoke from the grate cooler contains a large amount of particulate matter, and high-speed scouring will directly wear down the thermocouple protective sheath, shortening its service life. Frequent replacement increases maintenance costs. Therefore, we need a high-efficiency waste heat boiler for grate coolers. Utility Model Content

[0004] The purpose of this utility model is to provide a high-efficiency waste heat boiler for grate coolers to solve the existing problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency waste heat boiler for a grate cooler, comprising a grate cooler body, a boiler shell disposed on the outside of the grate cooler body, an economizer, an evaporator, and a superheater disposed sequentially inside the boiler shell, a purging assembly disposed inside the boiler shell, and a temperature measuring assembly disposed inside the boiler shell; the temperature measuring assembly includes a mounting base, which is fixed inside the boiler shell, and the mounting base is fixed to the boiler shell by bolts; a spring is connected to one side of the mounting base, and a movable base is connected to the other end of the spring; a telescopic rod is hinged inside the mounting base; a sliding rod is fixedly connected inside the mounting base; an installation plate is fixedly connected to the top of the movable base, and a high-temperature thermocouple is installed on the installation plate.

[0006] Preferably, the mounting base is fixed to the boiler shell by bolts, and the bolts are threaded through the mounting base and connected to the boiler shell.

[0007] Preferably, the mounting base and the movable base form an elastic structure through a spring, and the spring is disposed between the mounting base and the movable base.

[0008] Preferably, the mounting base forms a movable structure with the movable base via a telescopic rod, and the two ends of the telescopic rod are hinged to the mounting base and the movable base respectively.

[0009] Preferably, the purging assembly includes a gas tank, which is fixed to one side of the boiler shell. The output end of the gas tank is connected to a gas pipe via a gas pump. A fixed box is connected to the end of the gas pipe. A nozzle is rotatably connected to one end of the gas pipe. A gear is fixedly connected to the outer wall of the nozzle. A rack is meshed with the outer wall of the gear. A movable sleeve is fixedly connected to one side of the rack. A guide rod is slidably connected inside the movable sleeve. An electric push rod is provided on one side of the movable sleeve.

[0010] Preferably, the gas tank is connected to the fixed box via an air pump and an air pipe, and the air pipe is located between the gas tank, the air pump and the fixed box.

[0011] Preferably, the fixed box forms a meshing transmission structure through a gear and a rack, with the outer side of the gear meshing with the inner side of the rack, and the gear and rack working together to drive the nozzle to adjust its angle.

[0012] Preferably, the movable sleeve forms a sliding structure with the guide rod via an electric push rod, and the inner diameter of the movable sleeve matches the outer diameter of the guide rod, and the inner wall of the movable sleeve is fitted to the outer wall of the guide rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In the scheme of this application:

[0015] 1. To address the problems of thermocouples being susceptible to wear and tear from flue gas impacts, inaccurate temperature measurement, and poor protection in existing technologies, this application implements a dynamic buffer protection for high-temperature thermocouples by setting up an elastic support structure including a movable seat, a sliding rod, a telescopic rod, and a spring. When flue gas impacts the thermocouple, the thermocouple drives the movable seat to slide along the sliding rod and presses against the telescopic rod. The impact force is absorbed by the elastic deformation of the spring, effectively reducing the direct wear of the thermocouple by flue gas particles and extending its service life. At the same time, it ensures stable temperature measurement of the thermocouple under complex operating conditions, avoids excessive evaporation or waste of waste heat due to temperature measurement failure, improves waste heat recovery efficiency and boiler operation safety, and significantly reduces maintenance costs.

[0016] 2. To address the issues of inaccurate temperature measurement and limited purging range caused by dust accumulation in existing high-temperature thermocouples, this application proposes a pneumatic purging and angle adjustment mechanism comprising an air pump, nozzle, electric push rod, and rack and pinion transmission assembly. This mechanism enables multi-directional dynamic cleaning of the thermocouple. The air pump draws inert gas from the gas tank and delivers it to the nozzle via a gas pipe, efficiently removing dust particles adhering to the thermocouple surface, preventing the formation of an insulation layer, and ensuring temperature measurement accuracy. Simultaneously, the electric push rod drives the movable sleeve to slide along the guide rod, and the rack and pinion drive the gear to rotate, thereby adjusting the nozzle angle, expanding the purging coverage area, further reducing the risk of dust accumulation, and improving the thermocouple's service life and the stability of the waste heat recovery system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 This is a schematic diagram of the purging assembly and boiler shell structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the purging assembly structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the temperature measuring component of this utility model.

[0021] In the diagram: 1. Grate cooler body; 2. Boiler shell; 3. Economizer; 4. Evaporator; 5. Superheater; 6. Purge assembly; 601. Gas tank; 602. Gas pump; 603. Gas pipe; 604. Fixing box; 605. Nozzle; 606. Gear; 607. Rack; 608. Moving sleeve; 609. Guide rod; 610. Electric push rod; 7. Temperature measuring assembly; 701. Mounting base; 702. Bolt; 703. Spring; 704. Telescopic rod; 705. Moving base; 706. Slide rod; 707. Mounting plate; 708. High-temperature thermocouple. Detailed Implementation

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

[0023] This utility model embodiment provides a high-efficiency waste heat boiler for grate coolers, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the system includes a grate cooler body 1, a boiler shell 2 on the outside of the grate cooler body 1, an economizer 3, an evaporator 4, and a superheater 5 arranged sequentially inside the boiler shell 2, a purging assembly 6 inside the boiler shell 2, and a temperature measuring assembly 7 inside the boiler shell 2. The temperature measuring assembly 7 includes a mounting base 701, which is fixed inside the boiler shell 2. The mounting base 701 is fixed to the boiler shell 2 by bolts 702. A spring 703 is connected to one side of the mounting base 701, and a movable seat 705 is connected to the other end of the spring 703. A telescopic rod 704 is hinged inside the mounting base 701, and a sliding rod 706 is fixedly connected inside the mounting base 701. A [missing information - likely a component or component] is fixedly connected to the top of the movable seat 705. Mounting plate 707, on which a high-temperature thermocouple 708 is installed. The high-temperature thermocouple 708 can measure the temperature of the economizer 3, evaporator 4, and superheater 5 inside the boiler shell 2, preventing excessive evaporation and waste of waste heat. At the same time, when external flue gas enters, the high-temperature thermocouple 708 is mounted on the movable seat 705 by the mounting plate 707 at the bottom. When the high-temperature thermocouple 708 is impacted, it can drive the movable seat 705 to slide along the outer wall of the slide rod 706, and the movable seat 705 can squeeze the telescopic rod 704. The spring 703 provides cushioning. The elastic support structure improves the protection of the high-temperature thermocouple 708.

[0024] Further, such as Figure 4 As shown, the mounting base 701 is fixed to the boiler shell 2 by bolts 702, and the bolts 702 pass through the mounting base 701 and are threadedly connected to the boiler shell 2. By using the bolts 702, the mounting base 701 can be fixed inside the boiler shell 2.

[0025] Further, such as Figure 4 As shown, the mounting base 701 forms an elastic structure with the movable base 705 through the spring 703, and the spring 703 is disposed between the mounting base 701 and the movable base 705, which strengthens the connection effect between the mounting base 701 and the spring 703, so that the mounting base 701 can support the movable base 705 with the support of the spring 703.

[0026] Further, such as Figure 4 As shown, the mounting base 701 forms a movable structure with the movable base 705 through the telescopic rod 704, and the two ends of the telescopic rod 704 are respectively hinged to the mounting base 701 and the movable base 705. By setting it in the telescopic rod 704, it can be buffered by the support of the telescopic rod 704 when the movable base 705 is displaced.

[0027] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the purging assembly 6 includes an air tank 601, which is fixed to one side of the boiler shell 2. The output end of the air tank 601 is connected to an air pipe 603 via an air pump 602. A fixed box 604 is connected to the end of the air pipe 603. A nozzle 605 is rotatably connected to one end of the air pipe 603. A gear 606 is fixedly connected to the outer wall of the nozzle 605. A rack 607 is meshed with the outer wall of the gear 606. A movable sleeve 608 is fixedly connected to one side of the rack 607. A guide rod 609 is slidably connected inside the movable sleeve 608. An electric push rod 610 is provided on one side of the movable sleeve 608. The air pump 602 can purify the air tank 601. The gas inside 01 is extracted and transported through the gas pipe 603. At the same time, the nozzle 605 on the gas pipe 603 can blow inert gas onto the high-temperature thermocouple 708 to achieve the purpose of purging the high-temperature thermocouple 708. Simultaneously, the electric push rod 610 in the fixed box 604 is activated, which can drive the moving sleeve 608 to slide along the outer wall of the guide rod 609. The moving sleeve 608 can drive the rack 607 to move and drive the gear 606 to adjust the angle, which in turn can drive the nozzle 605 to adjust the angle, so as to perform multi-directional purging treatment on the high-temperature thermocouple 708.

[0028] Further, such as Figure 2 As shown, the gas tank 601 is connected to the fixed box 604 through the air pump 602 and the air pipe 603. The air pipe 603 is located between the gas tank 601, the air pump 602 and the fixed box 604, which strengthens the connection between the gas tank 601 and the air pump 602, and allows the air pump 602 to transport the inert gas in the gas tank 601 through the air pipe 603.

[0029] Further, such as Figure 2 and Figure 3 As shown, the fixed box 604 forms a meshing transmission structure with the gear 606 and the rack 607. The outer side of the gear 606 meshes with the inner side of the rack 607. The gear 606 and the rack 607 work together to drive the nozzle 605 to adjust the angle, which strengthens the connection between the gear 606 and the rack 607. This allows the rack 607 to drive the gear 606 to rotate when it moves.

[0030] Further, such as Figure 2 and Figure 3 As shown, the movable sleeve 608 forms a sliding structure with the guide rod 609 via the electric push rod 610. The inner diameter of the movable sleeve 608 matches the outer diameter of the guide rod 609, and the inner wall of the movable sleeve 608 fits against the outer wall of the guide rod 609. This strengthens the connection between the electric push rod 610 and the movable sleeve 608, allowing the electric push rod 610 to drive the movable sleeve 608 to move and slide along the outer wall of the guide rod 609.

[0031] Working Principle: During operation, the flue gas generated inside the grate cooler body 1 can enter the boiler shell 2 for waste heat recovery. This allows the economizer 3, evaporator 4, and superheater 5 inside the boiler shell 2 to be heated by the flue gas, thus absorbing heat from the cold water to generate steam. A high-temperature thermocouple 708 measures the temperature of the economizer 3, evaporator 4, and superheater 5 inside the boiler shell 2 to prevent excessive evaporation and waste of waste heat. Simultaneously, when external flue gas enters, the high-temperature thermocouple 708 is mounted on a movable base 705 via a mounting plate 707 at its bottom. When the high-temperature thermocouple 708 is impacted, it can cause the movable base 705 to slide along the outer wall of the slide rod 706, allowing the movable base 705 to compress the telescopic rod 704, supported by a spring 703. The system provides cushioning and enhances the protection of the high-temperature thermocouple 708 through its elastic support structure. Simultaneously, the air pump 602 extracts gas from the gas tank 601 and delivers it via the air pipe 603. The nozzle 605 on the air pipe 603 blows inert gas onto the high-temperature thermocouple 708, achieving the purpose of purging it. Simultaneously, the electric push rod 610 inside the fixed box 604 is activated, causing the moving sleeve 608 to slide along the outer wall of the guide rod 609. This moving sleeve 608 then moves the rack 607, which in turn moves the gear 606 to adjust its angle, thereby adjusting the angle of the nozzle 605. This multi-directional purging of the high-temperature thermocouple 708 is achieved.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-efficiency waste heat boiler for a grate cooler, comprising a grate cooler body (1), characterized in that: The grate cooler body (1) is provided with a boiler shell (2) on its outside. Inside the boiler shell (2) are arranged an economizer (3), an evaporator (4) and a superheater (5) in sequence. Inside the boiler shell (2) are a purging assembly (6) and a temperature measuring assembly (7). The temperature measuring assembly (7) includes a mounting base (701), and the mounting base (701) is fixed inside the boiler shell (2). The mounting base (701) is secured by bolts (701). 2) Fixed on the boiler shell (2), one side of the mounting base (701) is connected to a spring (703), the other end of the spring (703) is connected to a movable base (705), a telescopic rod (704) is hinged inside the mounting base (701), a sliding rod (706) is fixedly connected inside the mounting base (701), and a mounting plate (707) is fixedly connected to the top of the movable base (705). A high-temperature thermocouple (708) is installed on the mounting plate (707).

2. The high-efficiency waste heat boiler for a grate cooler according to claim 1, characterized in that: The mounting base (701) is fixed to the boiler shell (2) by bolts (702), and the bolts (702) are threaded through the mounting base (701) and connected to the boiler shell (2).

3. The high-efficiency waste heat boiler for a grate cooler according to claim 1, characterized in that: The mounting base (701) forms an elastic structure with the movable base (705) via a spring (703), and the spring (703) is disposed between the mounting base (701) and the movable base (705).

4. A high-efficiency waste heat boiler for a grate cooler according to claim 1, characterized in that: The mounting base (701) forms a movable structure with the movable base (705) via the telescopic rod (704), and the two ends of the telescopic rod (704) are respectively hinged to the mounting base (701) and the movable base (705).

5. A high-efficiency waste heat boiler for a grate cooler according to claim 1, characterized in that: The purging assembly (6) includes a gas tank (601), which is fixed to one side of the boiler shell (2). The output end of the gas tank (601) is connected to the gas pipe (603) via a gas pump (602). The end of the gas pipe (603) is connected to a fixed box (604). One end of the gas pipe (603) is rotatably connected to a nozzle (605). A gear (606) is fixedly connected to the outer wall of the nozzle (605). A rack (607) is meshed with the outer wall of the gear (606). A movable sleeve (608) is fixedly connected to one side of the rack (607). A guide rod (609) is slidably connected inside the movable sleeve (608). An electric push rod (610) is provided on one side of the movable sleeve (608).

6. A high-efficiency waste heat boiler for a grate cooler according to claim 5, characterized in that: The gas tank (601) is connected to the fixed box (604) via the air pump (602) and the air pipe (603), and the air pipe (603) is located between the gas tank (601), the air pump (602) and the fixed box (604).

7. A high-efficiency waste heat boiler for a grate cooler according to claim 5, characterized in that: The fixed box (604) forms a meshing transmission structure through a gear (606) and a rack (607), and the outer side of the gear (606) meshes with the inner side of the rack (607), and the gear (606) and the rack (607) work together to drive the nozzle (605) to adjust the angle.

8. A high-efficiency waste heat boiler for a grate cooler according to claim 5, characterized in that: The movable sleeve (608) forms a sliding structure with the guide rod (609) through the electric push rod (610), and the inner diameter of the movable sleeve (608) matches the outer diameter of the guide rod (609), and the inner wall of the movable sleeve (608) is fitted to the outer wall of the guide rod (609).

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