An economizer bypass circulation device

Abstract

This utility model relates to the field of bypass circulation technology and discloses an economizer bypass circulation device, including two main frames and a water heater frame. The water heater frame is located on the right side of the two main frames, and a water distribution mechanism is located on the right side of the right main frame. The water distribution mechanism is used to quickly fill the heating medium into the economizer heating pipe. A preheating mechanism is located inside the water heater frame for preheating the heating medium. The water distribution mechanism includes multiple hot water suction pipes, the left sides of which are fixedly connected to the right side of the right main frame. Each of the hot water suction pipes has a water pipe connection key fixedly connected to its right side. In this utility model, each exposed section on the right side of the hot water suction pipe is connected to a secondary water pipe as an auxiliary channel for the flow of the working medium, reducing thermal stress damage to the hot water suction pipe caused by excessive instantaneous temperature difference and extending the service life of the heating water pipe.

Description

Technical Field

[0001] This utility model relates to the field of bypass circulation technology, and in particular to an economizer bypass circulation device. Background Technology

[0002] The economizer bypass circulation device is an auxiliary circulation system in the power plant boiler system that is connected in parallel with the main body of the economizer. It consists of bypass pipes, flow control components, water supply pipes and connecting structures. It changes the flow distribution of the working fluid in the economizer and bypass channels by diverting the flow, and is an important device for realizing flexible adjustment of the boiler thermal system.

[0003] The main function of this device is to optimize boiler operating conditions: when the economizer needs maintenance or malfunctions, the working fluid can be guided to bypass the main body of the economizer through bypass circulation to ensure continuous boiler operation; when the load changes drastically during boiler start-up and shutdown, the bypass flow rate can be adjusted to stabilize the working fluid parameters at the economizer inlet, preventing the economizer from being damaged due to sudden changes in operating conditions, while improving the energy utilization efficiency of the system.

[0004] Currently available economizer bypass circulation devices have shortcomings in dealing with sudden changes in operating conditions. At the moment of device startup, the high-temperature working fluid rushes into the water supply pipeline, causing the pipeline to expand due to rapid heating. When the device is shut down, the working fluid in the water supply pipeline cools down rapidly, causing the pipeline to contract quickly. This frequent thermal expansion and contraction can easily cause fatigue stress at the connection points of the water supply pipeline. After long-term operation, this can lead to a decrease in sealing performance or even pipeline cracking, severely shortening the service life of the water supply pipeline. At the same time, existing devices lack a buffer structure design for such sudden changes in operating conditions, and cannot alleviate the impact of sudden increases and decreases in heat on the water supply pipeline, exacerbating the pipeline wear problem. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an economizer bypass circulation device, which aims to improve the problem that existing technologies on the market cannot cope with insufficient heating medium during economizer start-up and shutdown, resulting in frequent thermal expansion and contraction and shortening the service life of water pipes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an economizer bypass circulation device, comprising two main frames and a water heater frame, wherein a water heater frame is provided on the right side of the two main frames, and a water distribution mechanism is provided on the right side of the right main frame, the water distribution mechanism being used to quickly fill the heating medium into the economizer heating pipe, and a preheating mechanism is provided inside the water heater frame, the preheating mechanism being used to preheat the heating medium.

[0007] The water distribution mechanism includes multiple hot water suction pipes. The left side of each of the multiple hot water suction pipes is fixedly connected to the right side of the right main frame. Each of the multiple hot water suction pipes is fixedly connected to a water pipe connection key. Each of the multiple water pipe connection keys is fixedly connected to a connecting soft water pipe on its right side. Each of the multiple connecting soft water pipes is fixedly connected to the same soft water pipe hard tail on its right side. The right side of the soft water pipe hard tail is fixedly connected to a connector. A gear pump assembly is provided on the right side of the connector. A water pipe clamping assembly is provided on the right side of the right main frame.

[0008] As a further description of the above technical solution:

[0009] The preheating mechanism includes two preheating box support frames, which are fixedly connected to the left and right sides of the water heater frame, respectively. Support frame bases are fixedly connected to the bottom of each of the two preheating box support frames. Heating wires are installed inside the water heater frame. Two electrodes are fixedly connected to the front end of the water heater frame. Inlet and outlet water inlets are installed on the right side of the right preheating box support frame.

[0010] As a further description of the above technical solution:

[0011] The gear pump assembly includes two gear pump housings. The left side of the front gear pump housing is fixedly connected to the right side of the tail. A secondary gear is rotatably connected to the top of the interior of each of the two gear pump housings. A main gear is rotatably connected to the bottom of the interior of each of the two gear pump housings. A drive motor is fixedly connected to the rear of each of the two gear pump housings. The output ends of the two drive motors are rotatably connected to the rear of the two main gears. Two gear pump support frames are fixedly connected to the left and right sides of each of the two drive motors.

[0012] As a further description of the above technical solution:

[0013] The water pipe clamping assembly includes a water pipe clamping key, the inner wall of which is fixedly connected to the right side of the outer wall of the water pipe connecting key, and multiple clamping key bolts are threadedly connected to the right side of the water pipe clamping key.

[0014] As a further description of the above technical solution:

[0015] The water inlet / outlet assembly includes two waterproof keys. The left side of each of the two waterproof keys is fixedly connected to the right side of the preheating box support frame, and the right side of each of the two waterproof keys is fixedly connected to an inlet / outlet.

[0016] As a further description of the above technical solution:

[0017] The bottom of both main frames is fixedly connected to a main support frame base plate, and the top of both main support frame base plates is threaded with multiple base plate fixing bolts.

[0018] As a further description of the above technical solution:

[0019] Both main frames are provided with a flue on their rear sides, and flue support plates are fixedly connected to the left and right sides of the flue.

[0020] As a further description of the above technical solution:

[0021] Multiple heat-collecting top plates are fixedly connected to the top of each of the two adjacent main frames, and multiple heat-collecting main plates are fixedly connected to each of the two adjacent main frames.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, each section of the hot water suction pipe has an exposed right side connected to a secondary water pipe. During the device startup phase, the secondary water pipe can serve as an auxiliary channel for the flow of the working fluid, accelerating the filling speed of the heating working fluid into the hot water suction pipe. In the initial stage of economizer startup, the delayed filling of the working fluid causes a local area of ​​the hot water suction pipe to be in a state of no working fluid cooling at high temperature, resulting in a situation where high temperature instantaneously acts on the empty pipe. The secondary water pipe accelerates the flow of the working fluid into the hot water suction pipe, reducing the thermal stress damage caused by the excessive instantaneous temperature difference in the hot water suction pipe and extending the service life of the heating water pipe.

[0024] 2. In this utility model, the preheating device on the right side of the apparatus can preheat the working fluid entering the system during cold seasons, so that the working fluid temperature is close to the normal working temperature range of the hot water pipe. This avoids the working fluid at too low a temperature from directly entering the heating water pipe, reduces the thermal shrinkage stress caused by the severe temperature difference between the low-temperature working fluid and the pipe wall, prevents the condensation corrosion problem that may occur when the low-temperature working fluid flows in the pipe, further ensures the structural stability of the heating water pipe, and extends its service life. Attached Figure Description

[0025] Figure 1 This is a perspective view of an economizer bypass circulation device proposed in this utility model;

[0026] Figure 2 This is a front view of an economizer bypass circulation device proposed in this utility model;

[0027] Figure 3 This is a top view of an economizer bypass circulation device proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the water distribution mechanism in an economizer bypass circulation device proposed in this utility model;

[0029] Figure 5 This is a structural exploded view of the gear pump assembly in an economizer bypass circulation device proposed in this utility model.

[0030] Legend:

[0031] 1. Main frame; 2. Water heater frame; 3. Water distribution mechanism; 31. Hot water suction pipe; 32. Water pipe connection key; 33. Connecting soft water pipe; 34. Soft water pipe hard tail; 35. Connector; 36. Gear pump assembly; 361. Gear pump housing; 362. Secondary gear; 363. Main gear; 364. Drive motor; 365. Gear pump support frame; 37. Water pipe clamping assembly; 371. Water pipe clamping key; 372. Clamping key bolt; 4. Preheating mechanism; 41. Preheating box support frame; 42. Support frame base; 43. Heating wire; 44. Electrode; 45. Inlet / outlet assembly; 451. Waterproof key; 452. Inlet / outlet; 5. Main support frame grounding plate; 6. Grounding plate fixing bolts; 7. Flue; 8. Flue support plate; 9. Heat collector top plate; 10. Heat collector main plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0033] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model is provided: an economizer bypass circulation device, including two main frames 1 and a water heater frame 2. The water heater frame 2 is arranged on the right side of the two main frames 1. A water distribution mechanism 3 is arranged on the right side of the right main frame 1. The water distribution mechanism 3 is used to quickly fill the heating medium into the economizer heating pipe. A preheating mechanism 4 is arranged inside the water heater frame 2. The preheating mechanism 4 is used to preheat the heating medium.

[0034] The water distribution mechanism 3 includes multiple hot water suction pipes 31. The left side of the multiple hot water suction pipes 31 is fixedly connected to the right side of the right main frame 1. The right side of each of the multiple hot water suction pipes 31 is fixedly connected to a water pipe connection key 32. The right side of each of the multiple water pipe connection keys 32 is fixedly connected to a connecting soft water pipe 33. The right side of each of the multiple connecting soft water pipes 33 is fixedly connected to the same soft water pipe hard tail 34. The right side of the soft water pipe hard tail 34 is fixedly connected to a connector 35. A gear pump assembly 36 is provided on the right side of the connector 35. A water pipe clamping assembly 37 is provided on the right side of the right main frame 1.

[0035] Specifically, the coal-fired bypass circulation device in this province is based on two main frames 1 as the supporting structure. The right side of the two main frames 1 is connected to the water heater frame 2. The right side of the right main frame 1 is equipped with a water distribution mechanism 3. The water heater frame 2 is equipped with a preheating mechanism 4 inside. Through the coordinated operation of each component, the heating medium is quickly filled and preheated.

[0036] The water distribution mechanism 3 includes multiple hot water suction pipes 31. The left side of each hot water suction pipe 31 is fixedly connected to the right side of the right main frame 1. The right end of the hot water suction pipe 31 is connected to a water pipe connection key 32. The right side of the water pipe connection key 32 is fixed to one end of the connecting soft water pipe 33. The other end of the connecting soft water pipe 33 is connected to the hard tail 34 of the soft water pipe. The right side of the hard tail 34 of the soft water pipe is connected to a connector 35. A gear pump assembly 36 is installed on the right side of the connector 35. After the gear pump assembly 36 is started, it can drive the heating medium to enter from the connector 35, flow through the hard tail 34 of the soft water pipe, the connecting soft water pipe 33 and the water pipe connection key 32 in sequence, and finally enter the interior of the hot water suction pipe 31.

[0037] Since multiple hot water pipes 31 are connected to the flexible water pipe tail 34 through independent connecting flexible water pipes 33, the heating medium can flow into different hot water pipes 31 simultaneously through multiple channels. A water pipe clamping component 37 is provided on the right side of the main frame 1. The water pipe clamping component 37 cooperates with the outside of the hot water pipe 31 to limit the position of the hot water pipe 31 and prevent the hot water pipe 31 from shifting under the impact force generated by the flow of the medium.

[0038] The preheating mechanism 4 inside the water heater frame 2 is used to pre-treat the heating medium entering the system. After the heating medium enters the preheating mechanism 4, it is heated by the action of the preheating mechanism 4 and then transported to the input end of the water distribution mechanism 3, forming a continuous medium flow path with the water distribution mechanism 3.

[0039] The right main frame 1 supports and fixes the water distribution mechanism 3, ensuring that the hot water suction pipe 31 and the water pipe clamping assembly 37 maintain a stable relative position during operation. The water heater frame 2 provides installation space for the preheating mechanism 4, ensuring the normal operation of the preheating mechanism 4.

[0040] The soft water pipe 33 has a certain degree of flexibility, which can adapt to slight displacement that may occur during the operation of the device, and avoid damage to components caused by rigid connection. The hard tail of the soft water pipe 34 can ensure the structural strength of the connection with the tail 35 and prevent the medium from leaking at this position.

[0041] The water pipe connection key 32 is used to strengthen the connection between the hot water suction pipe 31 and the connecting soft water pipe 33, to ensure the sealing of the connection between the two, and to prevent leakage of the heating medium during the flow process, which would affect the operating efficiency of the device.

[0042] The gear pump assembly 36 provides power for the flow of the heating medium and controls the delivery speed and flow rate of the medium through its own operation, so that the heating medium can enter the hot water suction pipe 31 and meet the working requirements of the economizer bypass circulation.

[0043] The cooperation between the preheating mechanism 4 and the water distribution mechanism 3 ensures that the heating medium is preheated before entering the hot water intake pipe 31, and at the same time, rapid filling is achieved through multiple channels of the water distribution mechanism 3, thus jointly ensuring the stable operation of the device.

[0044] Reference Figure 1 , Figure 2 and Figure 4 The preheating mechanism 4 includes two preheating box support frames 41, which are fixedly connected to the left and right sides of the water heater frame 2 respectively. The bottom of each of the two preheating box support frames 41 is fixedly connected to a support frame base 42. The water heater frame 2 is equipped with an electric heating wire 43. Two electrodes 44 are fixedly connected to the front end of the water heater frame 2. The right side of the right preheating box support frame 41 is equipped with an inlet / outlet assembly 45.

[0045] Specifically, multiple hot water suction pipes 31 of the water distribution mechanism 3 are fixedly connected to the right side of the main frame 1 on the right side. The right side of the hot water suction pipes 31 is fixed to the connecting soft water pipes 33 via water pipe connection keys 32. The right sides of the multiple connecting soft water pipes 33 are connected to the soft water pipe hard tail 34. The right side of the soft water pipe hard tail 34 is connected to the connector 35. A gear pump assembly 36 is set on the right side of the connector 35. A water pipe clamping assembly 37 is installed on the right side of the main frame 1 on the right side. The water pipe clamping assembly 37 is in contact with the outside of the hot water suction pipes 31. A preheating mechanism 4 is set inside the water heater frame 2. The two preheating box support frames 41 of the preheating mechanism 4 are fixed to the left and right sides of the water heater frame 2 on adjacent sides respectively. A support frame base 42 is fixed at the bottom of the preheating box support frame 41. An electric heating wire 43 is installed inside the water heater frame 2. Two electrodes 44 are fixed at the front end of the water heater frame 2. An inlet and outlet assembly 45 is set on the right side of the right preheating box support frame 41.

[0046] When the gear pump assembly 36 is running, the heating medium enters the soft water pipe hard tail 34 from the tail 35, and flows into the hot water suction pipe 31 through the connecting soft water pipe 33 and the water pipe connecting key 32; the water pipe clamping assembly 37 fits against the outside of the hot water suction pipe 31, restricting the radial movement of the hot water suction pipe 31; the two main frames 1 are arranged in parallel, and the right main frame 1 provides the installation reference for each component of the water distribution mechanism 3.

[0047] The internal space of the water heater frame 2 accommodates the heating wire 43 of the preheating mechanism 4, and two electrodes 44 are respectively connected to the two ends of the heating wire 43; the top of the preheating box support frame 41 is fixed to the inner wall of the water heater frame 2, and the support frame base 42 is in contact with the bottom of the water heater frame 2; one end of the inlet / outlet assembly 45 is connected to the right side of the right preheating box support frame 41, and the other end is connected to the external medium conveying pipeline; the left end of the hot water suction pipe 31 passes through the right side wall of the right main frame 1 and is welded to the right side wall of the right main frame 1; the left end of the water pipe connection key 32 is sleeved on the outside of the right end of the hot water suction pipe 31, and the right end of the water pipe connection key 32 is sleeved on the outside of the left end of the connecting soft water pipe 33;

[0048] The right end of the connecting soft water pipe 33 is embedded inside the left side of the hard end of the soft water pipe 34 and fixed to the left inner wall of the hard end of the soft water pipe 34; the right end of the hard end of the soft water pipe 34 is threadedly connected to the left end of the connector 35; the two ends of the heating wire 43 are respectively connected to the inner side of the two electrodes 44, and the heating wire 43 is spirally distributed inside the water heater frame 2; the vertical part of the preheating box support frame 41 is fixed to the side wall of the water heater frame 2, and the horizontal part of the preheating box support frame 41 supports the internal components of the water heater frame 2.

[0049] The bottom of the support frame base 42 is attached to the bottom inner wall of the water heater frame 2, and the support frame base 42 is fixed to the bottom of the water heater frame 2 by bolts; two electrodes 44 are located on the left and right sides of the front end of the water heater frame 2 respectively, and the rear end of the electrodes 44 penetrates the front wall of the water heater frame 2 and extends into the interior of the water heater frame 2; the inlet end of the inlet and outlet assembly 45 is connected to the external water source, and the outlet end of the inlet and outlet assembly 45 is connected to the interior of the water heater frame 2; multiple hot water suction pipes 31 of the water distribution mechanism 3 are evenly distributed along the right side wall of the right main frame 1, and the spacing between adjacent hot water suction pipes 31 is equal; the length of the connecting soft water pipe 33 is adjusted according to the position of the hot water suction pipe 31, so that the right ends of multiple hot water suction pipes 31 are on the same plane.

[0050] The internal channel of the soft water pipe hard tail 34 is connected to the internal channel of multiple connected soft water pipes 33; the input end of the gear pump assembly 36 is connected to the inlet and outlet assembly 45 of the preheating mechanism 4 through a pipeline; a gap is left between the heating wire 43 and the inner wall of the water heater frame 2; the height of the preheating box support frame 41 is adapted to the internal height of the water heater frame 2; the outer side of the electrode 44 is connected to the external power supply line.

[0051] The inlet / outlet assembly 45 is equipped with a one-way valve; the internal channel of the hot water suction pipe 31 is connected to the internal channel of the water pipe connection key 32; the internal channel of the connecting soft water pipe 33 is connected to the internal channel of the soft water pipe hard tail 34; the internal channel of the connector 35 is coaxially arranged with the internal channel of the soft water pipe hard tail 34.

[0052] Reference Figure 1 , Figure 2 and Figure 5 The gear pump assembly 36 includes two gear pump housings 361. The left side of the front gear pump housing 361 is fixedly connected to the right side of the connector 35. A secondary gear 362 is rotatably connected to the top of the interior of each gear pump housing 361, and a main gear 363 is rotatably connected to the bottom of the interior of each gear pump housing 361. A drive motor 364 is fixedly connected to the rear of each gear pump housing 361. The output ends of the two drive motors 364 are rotatably connected to the rear of the two main gears 363. Two gear pump support frames 365 are fixedly connected to the left and right sides of each drive motor 364. The water pipe clamping assembly 37 includes a water pipe clamping key 371. The inner wall of the water pipe clamping key 371 is fixedly connected to the right side of the outer wall of the water pipe connecting key 32. The right side of the locking key 371 is threaded with multiple locking key bolts 372. The inlet and outlet water inlet assembly 45 includes two waterproof keys 451. The left side of the two waterproof keys 451 is fixedly connected to the right side of the preheating box support frame 41. The right side of the two waterproof keys 451 is fixedly connected with an inlet and outlet 452. The bottom of the two main frames 1 is fixedly connected with a main support frame ground plate 5. The top of the two main support frame ground plates 5 is threaded with multiple ground plate fixing bolts 6. The rear side of the two main frames 1 is provided with a flue duct 7. The left and right sides of the flue duct 7 are fixedly connected with flue support plates 8. The top of the two adjacent main frames 1 is fixedly connected with multiple heat collection top plates 9. The adjacent main frames 1 are fixedly connected with multiple heat collection main plates 10.

[0053] Specifically, multiple hot water suction pipes 31 of the water distribution mechanism 3 are fixed on the right side of the main frame 1. The right side of the multiple hot water suction pipes 31 is connected to the soft water pipe 33 via the water pipe connection key 32. The right side of the multiple connected soft water pipes 33 is connected to the soft water pipe hard tail 34. The right side of the soft water pipe hard tail 34 is connected to the tail 35. The right side of the tail 35 is equipped with a gear pump assembly 36. The gear pump assembly 36 includes two gear pump housings 361. The left side of the front gear pump housing 361 is connected to the right side of the tail 35. The top of the front gear pump housing 361 is connected to the secondary gear 362 and the bottom of the front gear 361 is connected to the main gear 363. The rear of the front gear pump housing 361 is fixed with a drive motor 364. The output end of the motor is connected to the rear of the main gear 363. The left and right sides are fixed with gear pump support frames 365. The right side of the main frame 1 is equipped with a water pipe clamping assembly 37. The inner wall of the water pipe clamping key 371 is connected to the right side of the outer wall of the water pipe connection key 32. The right side is threaded with multiple clamping key bolts 372.

[0054] The water heater frame 2 is equipped with a preheating mechanism 4. Two preheating box support frames 41 are connected to the left and right sides of the water heater frame 2 on adjacent sides, and the bottom is connected to the support frame base 42. The heating wire 43 is installed inside, and two electrodes 44 are fixed at the front end. The right side of the preheating box support frame 41 is equipped with an inlet and outlet water inlet assembly 45. Two waterproof buttons 451 are connected to the right side of the preheating box support frame 41 on the left and to the inlet and outlet 452 on the right.

[0055] The two main frames 1 are connected to the main support frame base plate 5 at the bottom and to multiple base plate fixing bolts 6 at the top; the rear side is provided with a flue 7, and the left and right sides are connected to the flue support plate 8; the top of the adjacent frames is connected to multiple heat collection top plates 9, and the adjacent frames are connected to multiple heat collection main plates 10.

[0056] The auxiliary gear 362 meshes with the main gear 363, and when the motor 364 is running, the main gear 363 drives the auxiliary gear 362 to rotate; the gear pump support frame 365 supports and drives the motor 364; the water pipe locking key 371 restricts the movement of the water pipe connection key 32 through the locking key bolt 372; the waterproof key 451 is attached to the preheating box support frame 41, and the inlet and outlet channels 452 are connected to the waterproof key 451; the main support frame ground plate 5 is fixed by the ground plate fixing bolt 6; the flue duct 7 is connected to the rear side of the main frame 1, and the flue support plate 8 supports the flue duct 7; the heat collection top plate 9 and the heat collection main plate 10 are respectively connected to the two main frames 1 at both ends.

[0057] Working Principle: When the bypass circulation device of this province's coal heater is running, the heating medium to be processed is first transported to the preheating mechanism 4 by the external power system. The heating medium enters the water heater frame 2 through the inlet / outlet assembly 45. The heating medium flows in through the inlet / outlet 452 and enters the space enclosed by the preheating box support frame 41 through the waterproof key 451. The external power supply connected to the two electrodes 44 is activated, and the current is conducted through the electrodes 44 to the heating wire 43. After the heating wire 43 is energized, it generates heat to preheat the heating medium entering the water heater frame 2. During the preheating process, the preheating box support frame 41 provides support and fixation for the internal structure of the water heater frame 2, and the support frame base 42 enhances the connection stability between the preheating box support frame 41 and the bottom of the water heater frame 2, ensuring that the preheating mechanism 4 will not shift during operation. When the heating medium is heated to the preset temperature range in the preheating mechanism 4, it will enter the water distribution mechanism 3 to begin the next stage of processing.

[0058] After the heating medium flows out from the preheating mechanism 4, it enters the gear pump assembly 36 of the water distribution mechanism 3, driving the motor 364 to start. The output of the motor drives the main gear 363 to rotate. Because the main gear 363 and the auxiliary gear 362 mesh with each other, the rotation of the main gear 363 drives the auxiliary gear 362 to rotate synchronously. Under the meshing action of the two gears, a pressure difference is formed inside the gear pump housing 361, drawing the heating medium from the tail section 35. The gear pump support frame 365 provides stable support for the motor 364, preventing the motor 364 from... During operation, the heating medium deviates from its normal operating position due to vibration. The heating medium enters the flexible water pipe 34 through the connector 35 and then flows into multiple connected flexible water pipes 33. The connected flexible water pipes 33, with their own flexibility, can adapt to the slight vibrations that may occur during the operation of the device, avoiding pipe damage caused by rigid connections. After passing through the connected flexible water pipes 33, the heating medium enters the hot water suction pipe 31 through the water pipe connection key 32. The water pipe connection key 32 ensures a sealed connection between the hot water suction pipe 31 and the connected flexible water pipes 33, preventing leakage of the heating medium.

[0059] During the flow of the heating medium through the hot water suction pipe 31, the right main frame 1 provides a stable installation foundation for the hot water suction pipe 31. The water pipe clamping assembly 37 further fixes the hot water suction pipe 31. The water pipe clamping key 371 is tightly attached to the right side of the outer wall of the water pipe connecting key 32 by the clamping key bolt 372, which restricts the axial and radial displacement of the hot water suction pipe 31 and ensures that the hot water suction pipe 31 remains stable when conveying the heating medium. At the same time, the main support frame grounding plate 5 at the bottom of the two main frames 1 cooperates with the grounding plate fixing bolt 6 to firmly install the entire device in the designated position and prevent the device from shaking during operation. The flue duct 7 is responsible for introducing the high-temperature flue gas from the outside into the device. The flue duct support plate 8 supports the flue duct 7 to ensure that the high-temperature flue gas can flow stably through the inside of the device and exchange heat with the heating medium in the hot water suction pipe 31. The heat collection top plate 9 and the heat collection main plate 10 form a closed structure on the top and sides of the device, which reduces heat loss and improves heat exchange efficiency.

[0060] After the heating medium completes heat exchange with the high-temperature flue gas introduced into the flue duct 7 in the hot water suction pipe 31, the temperature rises further. Then, it flows out of the hot water suction pipe 31 according to the preset path and enters the heating pipe of the economizer, providing a heating medium that meets the temperature requirements for the normal operation of the economizer. When the device needs to be stopped, the motor 364 stops working, the main gear 363 and the auxiliary gear 362 stop rotating, the gear pump assembly 36 no longer delivers the heating medium, and at the same time, the power supply of the preheating mechanism 4 is cut off, the heating wire 43 stops heating, and the delivery and preheating process of the heating medium is terminated.

[0061] Throughout the entire process, the various components work together to form a complete heating medium processing and conveying system. From the preheating and conveying of the heating medium to the heat exchange with the high-temperature flue gas, and finally to the economizer, each link has corresponding components playing a role, ensuring that the device can operate stably and efficiently.

[0062] Through the coordinated operation of multiple hot water suction pipes 31 and connecting soft water pipes 33 in the water distribution mechanism 3, the heating medium can be quickly and evenly filled into each hot water suction pipe 31, avoiding the problem of uneven medium distribution that may occur when transporting through a single pipeline. At the same time, the heating wire 43 of the preheating mechanism 4 preheats the heating medium, reducing the impact of low-temperature medium on the hot water suction pipes 31. The stable operation of the gear pump assembly 36 ensures the continuous delivery of the heating medium, while the water pipe clamping assembly 37 ensures the stability of the pipeline connection. This achieves efficient preheating and uniform distribution of the heating medium, reduces thermal stress damage to the hot water suction pipes 31 caused by sudden temperature changes, extends the service life of the device, and improves the working efficiency and reliability of the economizer bypass circulation.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. An economizer bypass circulation device, comprising two main frames (1) and a water heater frame (2), characterized in that: A water heater frame (2) is provided on the right side of the two main frames (1), and a water distribution mechanism (3) is provided on the right side of the main frame (1) on the right side. The water distribution mechanism (3) is used to quickly fill the heating medium into the economizer heating pipe. A preheating mechanism (4) is provided inside the water heater frame (2). The preheating mechanism (4) is used to preheat the heating medium. The water distribution mechanism (3) includes multiple hot water suction pipes (31). The left side of the multiple hot water suction pipes (31) is fixedly connected to the right side of the right main frame (1). The right side of each of the multiple hot water suction pipes (31) is fixedly connected to a water pipe connection key (32). The right side of each of the multiple water pipe connection keys (32) is fixedly connected to a connecting soft water pipe (33). The right side of each of the multiple connecting soft water pipes (33) is fixedly connected to the same soft water pipe hard tail (34). The right side of the soft water pipe hard tail (34) is fixedly connected to a connector (35). A gear pump assembly (36) is provided on the right side of the connector (35). A water pipe clamping assembly (37) is provided on the right side of the right main frame (1).

2. The economizer bypass circulation device according to claim 1, characterized in that: The preheating mechanism (4) includes two preheating box support frames (41). The two preheating box support frames (41) are fixedly connected to the left and right sides of the water heater frame (2) respectively. The bottom of each of the two preheating box support frames (41) is fixedly connected to a support frame base (42). The water heater frame (2) is provided with an electric heating wire (43). The front end of the water heater frame (2) is fixedly connected with two electrodes (44). The right side of the preheating box support frame (41) on the right side is provided with an inlet / outlet assembly (45).

3. The economizer bypass circulation device according to claim 1, characterized in that: The gear pump assembly (36) includes two gear pump housings (361). The left side of the front gear pump housing (361) is fixedly connected to the right side of the tail (35). The top of the interior of each gear pump housing (361) is rotatably connected to a secondary gear (362). The bottom of the interior of each gear pump housing (361) is rotatably connected to a main gear (363). The rear of each gear pump housing (361) is fixedly connected to a drive motor (364). The output ends of the two drive motors (364) are rotatably connected to the rear of the two main gears (363). The left and right sides of each drive motor (364) are fixedly connected to two gear pump support frames (365).

4. The economizer bypass circulation device according to claim 1, characterized in that: The water pipe clamping assembly (37) includes a water pipe clamping key (371), the inner wall of which is fixedly connected to the right side of the outer wall of the water pipe connecting key (32), and the right side of the water pipe clamping key (371) is threaded with multiple clamping key bolts (372).

5. The economizer bypass circulation device according to claim 2, characterized in that: The water inlet / outlet assembly (45) includes two waterproof keys (451). The left side of each of the two waterproof keys (451) is fixedly connected to the right side of the preheating box support frame (41), and the right side of each of the two waterproof keys (451) is fixedly connected to an inlet / outlet (452).

6. The economizer bypass circulation device according to claim 1, characterized in that: The bottom of each of the two main frames (1) is fixedly connected to a main support frame grounding plate (5), and the top of each of the two main support frame grounding plates (5) is threadedly connected to a plurality of grounding grounding plate fixing bolts (6).

7. The economizer bypass circulation device according to claim 1, characterized in that: Both main frames (1) are provided with a flue (7) on their rear sides, and flue support plates (8) are fixedly connected to the left and right sides of the flue (7).

8. The economizer bypass circulation device according to claim 1, characterized in that: Multiple heat collection top plates (9) are fixedly connected to the top of each of the two adjacent main frames (1), and multiple heat collection main plates (10) are fixedly connected to each of the two adjacent main frames (1).

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