Constant temperature adjusting device for drum wall of waste heat boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a waste heat boiler drum wall constant temperature adjusting device which comprises a boiler body, the bottom end of the boiler body is fixedly connected with the top end of a connecting block, the connecting block is arranged in a base, and a second temperature sensor is installed in the connecting block. Two mounting grooves are formed in the top end of the base, the two mounting grooves are used for allowing sliding strips to be mounted and inserted, the sliding strips are fixedly connected with the bottom ends of second mounting plates, the two second mounting plates are arranged, and a first mounting plate is mounted at the top end of the boiler body in a buckled mode; and a first heating electric plate is arranged on the inner side of the first mounting plate. The device adopts a synchronous monitoring structure of a top first temperature sensor and a bottom second temperature sensor, collects the temperature difference value of the upper and lower walls of the steam drum in real time, and dynamically adjusts the differential power output of the first and second heating electric plates in combination with a PLC, so as to reduce the temperature difference of the upper and lower ends of the steam drum wall and keep the temperature constant.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a constant temperature regulating device for the steam drum wall of a waste heat boiler. Background Technology

[0002] The steam drum is the heaviest and most expensive thick-walled pressure-bearing component in a boiler. During boiler start-up and shutdown, there is a certain temperature difference between the upper and lower walls and between the inner and outer walls of the steam drum, generating thermal stress. In particular, the steam drum wall of high-parameter boilers is very thick, and the lower half of the steam drum is in contact with the boiler water. The boiler water conducts convective heat transfer to it, and the temperature drops rapidly. Therefore, during the shutdown and cooling process, the temperature of the upper half of the steam drum wall is higher than that of the lower half, forming a temperature difference. If the temperature difference of the steam drum wall is too large, it will threaten the safety of the steam drum and easily lead to bending and deformation of the steam drum, which will affect the safe operation and life of the steam drum. Therefore, it is very important to effectively control the temperature difference of the steam drum wall after the boiler is shut down. Hence, a constant temperature regulation device for the steam drum wall of a waste heat boiler is proposed. Utility Model Content

[0003] To address the problems in the existing technology, this utility model provides a constant temperature regulating device for the steam drum wall of a waste heat boiler.

[0004] The technical solution adopted by this utility model to solve its technical problem is a waste heat boiler drum wall constant temperature regulating device, including a boiler body. The bottom end of the boiler body is fixedly connected to the top end of a connecting block. The connecting block is located inside the base. A second temperature sensor is installed inside the connecting block. The sensing end of the second temperature sensor is in contact with the bottom end of the boiler body. The top end of the base is provided with an installation groove. There are two installation grooves for inserting a slide bar. The slide bar is fixedly connected to the bottom end of a second mounting plate. There are two second mounting plates. The second mounting plate is arranged in an arc shape. A second heating plate is provided on the inner side of the second mounting plate.

[0005] By adopting the above technical solution, the device uses a structure that synchronously monitors the temperature difference between the upper and lower walls of the steam drum in real time. Combined with the PLC controller, it dynamically adjusts the differentiated power output of the first and second heating plates. When the temperature of the upper half of the steam drum is detected to be higher than that of the lower half (such as during the shutdown cooling stage), the heating intensity of the bottom is increased first to accurately compensate for the temperature loss of the lower half of the drum; otherwise, the temperature control of the top is enhanced, forming a closed-loop feedback regulation system.

[0006] Employing a split mounting plate and slide rail insertion technology, the second mounting plate achieves fine-tuning of its horizontal position through the cooperation of a slide bar and a guide rail in the base mounting slot, ensuring a tight fit between the arc-shaped heating surface and the outer wall of the steam drum. Meanwhile, the top first mounting plate uses a modular assembly method with block-slot positioning and bolt locking, combined with a removable insulation layer, enabling rapid disassembly and maintenance of the entire unit.

[0007] Specifically, a first mounting plate is fastened to the top of the boiler body, a first heating plate is provided on the inner side of the first mounting plate, a first temperature sensor is provided on the inner top of the first mounting plate, and the sensing end of the first temperature sensor is in contact with the top of the boiler body.

[0008] By adopting the above technical solution, the first mounting plate can be quickly disassembled and assembled through the fastening mechanism. The first heating plate on its inner side forms a heating surface with the top of the boiler. The first temperature sensor adopts a contact installation to directly monitor the top wall temperature of the boiler and forms a dual-point temperature sampling with the second sensor at the bottom.

[0009] Specifically, both the outer sides of the first mounting plate and the second mounting plate are fixedly pasted with an insulation layer.

[0010] By adopting the above technical solution, the insulation layer is attached to the outer side of the first mounting plate and the second mounting plate respectively by a polymer adhesive, forming a radial thermal resistance barrier during the operation of the first heating plate and the second heating plate, reducing convective heat loss and ensuring constant temperature effect.

[0011] Specifically, the top of the second mounting plate has a slot for inserting a plug. There are two plugs, which are fixedly connected to the two ends of the first mounting plate.

[0012] Specifically, a bolt is installed on the outside of the second mounting plate, and one end of the bolt passes through the insulation layer and the second mounting plate and is screwed into the interior of the insert.

[0013] By adopting the above technical solution, the two inserts at the bottom of the first mounting plate can be inserted into the slots at the top of the two second mounting plates, and bolts can be installed from the outside of the second mounting plate and screwed into the inside of the inserts, so that the first mounting plate and the second mounting plate can be fixedly connected.

[0014] The beneficial effects of this utility model are:

[0015] (1) The waste heat boiler drum wall constant temperature regulation device of the present invention adopts a top first temperature sensor and bottom second temperature sensor synchronous monitoring structure. By collecting the temperature difference between the upper and lower walls of the drum in real time, and combining the PLC controller to dynamically adjust the differentiated power output of the first and second heating plates, when the temperature of the upper half of the drum is detected to be higher than that of the lower half (such as during the shutdown cooling stage), the bottom heating intensity is increased first to accurately compensate for the temperature loss of the lower half; otherwise, the top temperature control is enhanced to form a closed-loop feedback regulation system.

[0016] (2) The waste heat boiler drum wall constant temperature adjustment device of this utility model adopts the split mounting plate and slide rail plug-in technology. The second mounting plate achieves horizontal position fine adjustment through the cooperation of the guide rail of the base mounting groove with the slide bar, ensuring that the arc heating surface is tightly attached to the outer wall of the drum. At the same time, the top first mounting plate adopts the modular assembly method of plug-slot positioning and bolt locking, combined with the design of detachable insulation layer, so that the whole device can be quickly disassembled and maintained. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

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

[0019] Figure 2 This is a schematic diagram of the boiler body structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the planar structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the second mounting plate structure of this utility model;

[0022] In the figure: 1. First mounting plate; 2. First temperature sensor; 3. Boiler body; 4. Second mounting plate; 5. Sliding bar; 6. Connecting block; 7. Second temperature sensor; 8. Bolt; 9. Base; 10. Mounting groove; 11. Second heating plate; 12. Slot; 13. Insert block; 14. Second heating plate; 15. Insulation layer. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] As one embodiment of this utility model, such as Figures 1-4 As shown, the waste heat boiler drum wall constant temperature regulating device of this utility model includes a boiler body 3. The bottom end of the boiler body 3 is fixedly connected to the top end of the connecting block 6. The connecting block 6 is located inside the base 9. A second temperature sensor 7 is installed inside the connecting block 6. The sensing end of the second temperature sensor 7 is in contact with the bottom end of the boiler body 3. The top end of the base 9 is provided with an installation groove 10. There are two installation grooves 10. The two installation grooves 10 are used for the installation and insertion of a slide bar 5. The slide bar 5 is fixedly connected to the bottom end of a second mounting plate 4. There are two second mounting plates 4. The second mounting plate 4 is arranged in an arc shape. A second heating plate 11 is provided on the inner side of the second mounting plate 4.

[0025] In use, the connecting block 6 acts as a force transmission component to transfer the vertical load of the boiler body 3 to the base 9. The second temperature sensor 7 embedded inside it collects the temperature of the bottom steam drum wall of the boiler in real time through contact temperature measurement. The guide rail cooperation structure of the mounting groove 10 and the slide bar 5 allows the second mounting plate 4 to slide along the horizontal axis to adjust the installation position, ensuring that the inner side of the second mounting plate 4 is in close contact with the outer wall of the boiler body 3, providing a stable heat conduction path for the second heating plate 11.

[0026] The present invention also includes a first mounting plate 1 fastened to the top of the boiler body 3, a first heating plate 14 provided on the inner side of the first mounting plate 1, a first temperature sensor 2 provided on the inner top of the first mounting plate 1, and the sensing end of the first temperature sensor 2 in contact with the top of the boiler body 3.

[0027] In use, the first mounting plate 1 can be quickly disassembled and assembled through a fastening mechanism. The first heating plate 14 on its inner side forms a heating surface with the top of the boiler. The first temperature sensor 2 adopts a contact installation to directly monitor the top wall temperature of the boiler and forms a dual-point temperature sampling with the second sensor 7 at the bottom.

[0028] The present invention also includes that the outer sides of the first mounting plate 1 and the second mounting plate 4 are both fixedly pasted with a heat insulation layer 15.

[0029] In use, the insulation layer 15 is attached to the outer side of the first mounting plate 1 and the second mounting plate 4 respectively by a polymer adhesive. During the operation of the first heating plate 14 and the second heating plate 11, a radial thermal resistance barrier is formed to reduce convective heat loss and ensure constant temperature effect.

[0030] It should be noted that the insulation layer 15 is made of aluminum silicate cotton.

[0031] The present invention also includes a slot 12 provided at the top of the second mounting plate 4, the slot 12 being used for inserting the plug 13, and two plugs 13 being provided, the two plugs 13 being fixedly connected to the two ends of the first mounting plate 1 respectively.

[0032] The present invention also includes a bolt 8 installed on the outer side of the second mounting plate 4, one end of the bolt 8 passing through the insulation layer 15 and the second mounting plate 4 and screwed into the interior of the insert block 13.

[0033] In use, the two inserts 13 at the bottom of the first mounting plate 1 can be inserted into the slots 12 at the top of the two second mounting plates 4, and the first mounting plate 1 and the second mounting plate 4 can be fixedly connected by bolts 8 from the outside of the second mounting plate 4 and screwed into the inside of the inserts 13.

[0034] In use, this invention first inserts the sliding strips 5 at the bottom of the two second mounting plates 4 into the mounting grooves 10, so that the inner side of the second mounting plates 4 is against the lower outer side of the boiler body 3. Then, by fastening the first mounting plate 1 to the top of the boiler body 3, the inner side of the first mounting plate 1 is against the upper outer side of the boiler body 3. The two inserts 13 at the bottom of the first mounting plate 1 can be inserted into the slots 12 at the top of the two second mounting plates 4. Bolts 8 are then used to install the second mounting plates 4 from the outside and screw them into the inserts 13, allowing the first mounting plate 1 and the second mounting plate 4 to... The components are fixedly connected, and then the temperature at the lower and upper ends of the boiler body 3 is detected in real time by the second temperature sensor 7 and the first temperature sensor 2. The detected signals are transmitted to the PLC controller. The PLC has a pre-programmed program and a constant temperature threshold is set. When the temperature detected by the two temperature sensors is lower than the set threshold, a control signal is generated by the PID or switch control algorithm to drive the first heating plate 14 and the second heating plate 11 to adjust the heating power. After the heating plate performs the action, the sensors continuously monitor and feed back the new temperature value, forming a dynamic adjustment cycle, and finally achieving precise temperature control.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waste heat boiler drum wall constant temperature regulating device, comprising a boiler body (3), characterized in that, The bottom end of the boiler body (3) is fixedly connected to the top end of the connecting block (6). The connecting block (6) is located inside the base (9). A second temperature sensor (7) is installed inside the connecting block (6). The sensing end of the second temperature sensor (7) is in contact with the bottom end of the boiler body (3). The top end of the base (9) is provided with an installation groove (10). There are two installation grooves (10). The two installation grooves (10) are used for the installation and insertion of the slide bar (5). The slide bar (5) is fixedly connected to the bottom end of the second mounting plate (4). There are two second mounting plates (4). The second mounting plate (4) is arranged in an arc shape. A second heating plate (11) is provided on the inner side of the second mounting plate (4).

2. The waste heat boiler drum wall constant temperature regulating device according to claim 1, characterized in that, The top of the boiler body (3) is fitted with a first mounting plate (1), the inner side of the first mounting plate (1) is provided with a first heating plate (14), the top inner side of the first mounting plate (1) is provided with a first temperature sensor (2), and the sensing end of the first temperature sensor (2) is in contact with the top of the boiler body (3).

3. The waste heat boiler drum wall constant temperature regulating device according to claim 2, characterized in that, The outer sides of the first mounting plate (1) and the second mounting plate (4) are both fixedly pasted with a heat insulation layer (15).

4. The waste heat boiler drum wall constant temperature regulating device according to claim 1, characterized in that, The top of the second mounting plate (4) is provided with a slot (12), which is used for the insertion of the plug (13). There are two plugs (13), which are fixedly connected to the two ends of the first mounting plate (1).

5. The waste heat boiler drum wall constant temperature regulating device according to claim 1, characterized in that, A bolt (8) is installed on the outside of the second mounting plate (4), and one end of the bolt (8) passes through the insulation layer (15) and the second mounting plate (4) and is screwed into the interior of the plug (13).

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