Energy-saving heating unit and control method based on feed water temperature adjustment

Abstract

The present invention discloses an energy-saving heating unit based on feed water temperature adjustment, including: a boiler, adding fuel to heat the heating unit, a main steam desuperheater is arranged outside the boiler, the steam generated by the boiler enters the main steam desuperheater to reduce the steam temperature, the cooled steam forms condensed water after being used by the user, and the condensed water enters the feed water regulating station through a high-pressure feed water pipe and is supplied to the feed water system; a connecting pipeline connects the boiler, the main steam desuperheater, the feed water regulating station and the feed water system to form a flow of steam from the boiler to the feed water system. The present application changes the state inside the boiler, increases the insulation structure of the boiler, can recover the temperature during the heating process of the boiler, heats the steam by the heat generated during the heating process of the boiler, uses the steam to heat the fuel, increases the temperature of the fuel when it enters the boiler, and thus reduces the heat loss of the fuel.

Description

Technical Field

[0001] The present invention relates to the technical field of heating units, and in particular to an energy-saving heating unit based on feed water temperature adjustment and a control method. Background Art

[0002] "Full heating of the unit" may refer to the full operation of the heating unit. The heating unit is an integrated heating system that can achieve rapid docking of the on-site boiler-system. The heating unit is generally used by heating network users, and the users' demand for heat is variable. When the demand at the heating end changes, the heating steam extraction volume must be adjusted, which will affect the operating conditions of the entire unit.

[0003] Feedwater temperature refers to the temperature of water as a working medium when it enters the steam boiler. The rated feedwater temperature is the feedwater temperature that should be guaranteed within the specified load range. For large condensing units, the final feedwater temperature is one of the important indicators that characterize the economic performance of the heat recovery cycle, which directly affects the average heat absorption temperature of the thermal cycle, and thus affects the thermal efficiency of the cycle.

[0004] Chinese patent publication number CN114963275B discloses a coal-fired heating unit, which includes: a steam turbine, a generator, a condenser, an electric heat pump, a water tank assembly, a heat supply and heat exchange station and a flywheel energy storage device; the steam turbine is used to be connected to the boiler, the generator is connected to the steam turbine, the condenser is connected to the exhaust steam end of the steam turbine, and the exhaust steam generated by the steam turbine is used to be discharged into the condenser; the electric heat pump is connected to the condenser, and the electric heat pump is used to collect the heat of the exhaust steam in the condenser, the water tank assembly is connected to the electric heat pump, and the electric heat pump is used to heat the water in the water tank assembly, the water tank assembly is connected to the heat supply and heat exchange station, and the heat supply and heat exchange station is used to collect the heat of the water in the water tank assembly to achieve heating; the flywheel energy storage device is electrically connected to the generator, and the flywheel energy storage device is used to store part of the electrical energy generated by the generator.

[0005] The heat loss of a boiler has a significant impact on its operating efficiency and economy:

[0006] Reduced thermal efficiency: Heat loss means that part of the heat in the fuel is not effectively utilized, but is dissipated in various forms, which reduces the thermal efficiency of the boiler.

[0007] Increased fuel consumption: To keep the boiler running, more fuel needs to be added to make up for the heat loss, which increases fuel consumption.

[0008] Environmental impact: Certain types of heat loss, such as heat loss from incomplete chemical combustion, may result in the emission of harmful substances and have an impact on the environment.

[0009] The heat loss of the boiler requires more fuel to reach the specified feed water temperature, resulting in increased fuel consumption. The increase in heat loss affects the heating effect of the boiler, resulting in an increase in heating consumption. Summary of the invention

[0010] One of the purposes of the present invention is to provide an energy-saving heating unit and control method based on feed water temperature adjustment. By changing the state inside the boiler, the heat loss of the boiler can be controlled and reduced, the heating efficiency of the boiler can be improved, and the feed water temperature can be controlled more accurately, thereby reducing fuel consumption.

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions: an energy-saving heating unit based on feed water temperature adjustment, comprising:

[0012] Boiler, add fuel to heat the heating unit, a main steam desuperheater is set outside the boiler, the steam generated by the boiler enters the main steam desuperheater to reduce the steam temperature, the cooled steam is used by the user to form condensed water, the condensed water enters the water supply regulating station through the high-pressure water supply pipe and is supplied to the water supply system;

[0013] Connect the pipelines to connect the boiler, main steam desuperheater, feedwater regulating station and feedwater system to form the flow of steam from the boiler to the feedwater system;

[0014] The heat-insulating structure is arranged inside the boiler, the heat-insulating structures are combined to form the inner wall of the boiler, steam pipes are arranged between the heat-insulating structures, the steam pipes are square and located between the gaps of the heat-insulating structures, and the outer wall of the steam pipes is in contact with the heat-insulating structure;

[0015] An adjustable reflector is arranged on the upper part of the heat preservation structure, and an adjusting structure is arranged inside the reflector to form support for the reflector. The angle position of the reflector is adjusted by the adjusting structure to change the heat reflection inside the boiler.

[0016] In one or more embodiments of the present invention, the upper part of the boiler is square and the lower part is circular. The reflective plate moves along the inner wall of the boiler. The reflective plate is triangular, and the upper inner wall of the boiler forms a seal for the reflective plate. The reflective plate is inserted into the interior of the boiler, and the inner wall of the boiler forms a support for the reflective plate.

[0017] In one or more embodiments of the present invention, a steam pipe extends from the outside of the boiler to the inside of the boiler, and the inside of the steam pipe is filled with medium water. The working heat of the boiler transfers the medium water inside the steam pipe to steam, and the upper part of the steam pipe extends from the inside of the boiler to the boiler feed port to heat the fuel;

[0018] The steam pipe consists of two parts: a main heat pipe and an auxiliary heat pipe. The main heat pipe and the auxiliary heat pipe are respectively located at the lower and upper inner sides of the boiler and embedded in the inner wall of the boiler. The main heat pipe and the auxiliary heat pipe are connected and arranged. The main heat pipe is distributed in a ring shape, and the auxiliary heat pipe is distributed in a square shape.

[0019] In one or more embodiments of the present invention, the regulating structure comprises:

[0020] A driving assembly is installed on the upper part of the boiler. A traction part is arranged on the outer side of the driving assembly. The traction part extends into the interior of the boiler and drives the reflector to move. The traction part includes a traction plate. The traction plate is hinged to one end of the reflector that is attached to the inner wall of the boiler. The traction plate is located inside the boiler and slides inside the boiler.

[0021] One reflector is connected to at least two traction plates, and the traction plates are symmetrically arranged about the center line of the reflector. At least two traction plates connected to the same reflector are arranged at the same height and move synchronously.

[0022] In one or more embodiments of the present invention, the traction unit further comprises:

[0023] A hydraulic cavity is provided inside the boiler, and the hydraulic cavity penetrates the boiler and extends to the inner wall of the boiler. A push rod is arranged inside the hydraulic cavity at an opening away from the driving assembly. The traction plate is fixed to one end of the push rod extending outside the hydraulic cavity and is driven by the push rod. The hydraulic cavity is filled with a medium.

[0024] The drive components include:

[0025] The driving motor is fixed on the outside of the boiler, a threaded tube is arranged on the inside of the boiler, and the threaded tube and the driving motor are driven by gear meshing. A hydraulic push rod is arranged on the outside of the threaded tube, one end of the hydraulic push rod extends into the hydraulic cavity and squeezes the medium inside the hydraulic cavity, and a transmission structure is arranged between the threaded tube and the hydraulic push rod to drive the hydraulic push rod.

[0026] In one or more embodiments of the present invention, the transmission structure includes:

[0027] The meshing wheel is fixed to the outside of the hydraulic push rod, and the meshing wheel and the outside of the threaded tube are provided with meshing teeth that can mesh with each other. The threaded tube rotates to drive the meshing wheel to rotate, thereby rotating the hydraulic push rod;

[0028] One end of the hydraulic push rod away from the hydraulic chamber extends to the inside of the boiler and is connected to the boiler thread. The rotation of the hydraulic push rod is limited by the thread so that the threaded push rod moves up and down during the rotation process.

[0029] The threaded tube is wound in a threaded shape, and the threaded tube rotates at a different time from the meshing time of the meshing wheel. The threaded tube drives the meshing wheel to rotate to cause the reflector to move in a dislocated manner.

[0030] In one or more embodiments of the present invention, the thermal insulation structure comprises:

[0031] A fixed insulation plate and an adjustable insulation plate, wherein the fixed insulation plate is fixed to the inner wall of the boiler and contacts the steam pipe, and the adjustable insulation plate is attached to the inner wall of the boiler and contacts the steam pipe, the fixed insulation plate and the adjustable insulation plate are coaxially arranged, and the inner walls of the fixed insulation plate and the adjustable insulation plate are located in the same arc surface;

[0032] The positioning ring can be rotatably installed inside the boiler. The adjustable insulation plate extends into the interior of the positioning ring and rotates with the positioning ring and can realize height adjustment. The contact surface between the adjustable insulation plate and the fixed insulation plate is an inclined surface, and the adjustable insulation plate and the fixed insulation plate are always in contact with each other through a limit block.

[0033] In one or more embodiments of the present invention, the thermal insulation structure further comprises:

[0034] A hydraulic system is arranged outside the boiler, and the hydraulic system extends to the inside of the boiler through a hydraulic pipeline. An arc block for arc motion is arranged inside the boiler, and the arc block is driven by the hydraulic system;

[0035] The annular pipeline is opened inside the boiler, one end of the arc block extends into the annular pipeline, and the positioning ring is fixed to the other end of the arc block.

[0036] The embodiment of the present application also provides a control method for an energy-saving heating unit, which is used to control the feed water temperature of the energy-saving heating unit, comprising the following steps:

[0037] Step 1: Set temperature sensors at the water supply position, steam pipe, and boiler outlet of the heating unit to obtain the temperatures of the water supply position, steam pipe, and boiler outlet;

[0038] Step 2: obtaining a change curve of the feed water temperature when the insulation structure is adjusted to different positions of the boiler during combustion of different fuels, and a change curve of the feed water temperature when the reflector is adjusted to different positions;

[0039] Step 3: Draw a change curve diagram through two change curves to analyze the effect of adjusting the insulation structure and the reflector on the change of the feed water temperature;

[0040] Step 4: Obtain a fuel consumption variation curve diagram when the insulation structure and the reflector are adjusted to different positions;

[0041] Step 5: Obtain the temperature changes of the boiler's fuel and feed water through two change curves, and adjust the positions of the insulation structure and the reflector according to the changes.

[0042] In one or more embodiments of the present invention, the optimal operating condition of the boiler can be obtained through two change curves, and the optimal positions of the insulation structure and the reflector plate when the optimal feed water temperature corresponding to the highest boiler operating efficiency is determined.

[0043] Through the above technical solution, the present invention has the following beneficial effects:

[0044] 1. The present application changes the internal state of the boiler and increases the insulation structure of the boiler. The temperature can be recovered during the heating process of the boiler. The heat generated during the heating process of the boiler is used to heat the steam, and the steam is used to heat the fuel, thereby increasing the temperature of the fuel when it enters the boiler, thereby reducing the heat loss of the fuel.

[0045] 2. The insulation structure installed inside the boiler can be adjusted to increase the gap between the insulation structures and expose the steam pipes in the gaps between the insulation structures. The temperature of the boiler will be directly transferred to the outside of the steam pipes to heat them, thereby increasing the temperature conduction of the steam pipes and accelerating the temperature consumption inside the boiler, thereby increasing the heat loss of the boiler.

[0046] 3. By controlling the insulation structure, the internal state of the boiler can be adjusted during use, the heat refraction angle can be changed, and the heat flow inside the boiler can be adjusted, and then the corresponding heat changes can be changed, thereby controlling the changes in heat consumption, ensuring accurate control of the feed water temperature, and increasing the rate of change of the feed water temperature.

[0047] 4. The control method of the heating unit can control the change of the feed water temperature, thereby improving the speed of the feed water temperature change and the control accuracy of the feed water temperature. Combined with the insulation structure inside the boiler, the insulation structure and the temperature change inside the boiler can be adjusted synchronously, thereby ensuring the fuel consumption during the use of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of a heating unit of the present invention;

[0049] Figure 2 A three-dimensional diagram of a boiler according to the present invention;

[0050] Figure 3 It is a schematic diagram of the boiler structure of the present invention;

[0051] Figure 4 is a cross-sectional view of a boiler according to the present invention;

[0052] Figure 5 It is a schematic diagram of the internal structure of the boiler of the present invention;

[0053] Figure 6 Schematic diagram of the threaded pipe of the present invention Figure 1 ;

[0054] Figure 7 Schematic diagram of the threaded pipe of the present invention Figure 2 ;

[0055] Figure 8 A schematic diagram of a steam pipe according to the present invention;

[0056] Fig. 9 It is a schematic diagram of the thermal insulation board assembly of the present invention;

[0057] Fig.10 It is a schematic diagram of the hydraulic push rod of the present invention;

[0058] Fig.11 is a schematic diagram of a reflector of the present invention;

[0059] Fig.12 is a cross-sectional view of a boiler according to the present invention;

[0060] Fig.13 It is a plan view of the annular pipeline of the present invention;

[0061] Fig.14 It is a schematic diagram of the limit block of the present invention.

[0062] In the figure: 100 boiler, 200 main steam desuperheater, 300 user, 400 feedwater regulating station, 500 feedwater system;

[0063] 600 insulation structure, 700 steam pipe, 800 adjustment structure, 900 reflector;

[0064] 601 fixed insulation board, 602 adjustable insulation board, 603 positioning ring, 604 limit block, 605 hydraulic system, 606 arc block, 607 annular pipeline;

[0065] 810 driving assembly, 811 driving motor, 812 threaded pipe, 813 gear, 814 hydraulic push rod, 815 transmission structure, 816 meshing wheel, 820 traction part, 821 traction plate, 822 hydraulic chamber, 823 push rod. DETAILED DESCRIPTION

[0066] The following will disclose multiple embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. And if it is possible to implement, the features of different embodiments can be applied interchangeably.

[0067] Unless otherwise defined, all words (including technical and scientific terms) used herein have their usual meanings, which can be understood by those familiar with this field. Furthermore, the definitions of the above words in commonly used dictionaries should be interpreted as the meanings consistent with the relevant fields of the present invention in the content of this specification. Unless otherwise clearly defined, these words will not be interpreted as idealized or overly formal meanings.

[0068] See also Figure 1-Figure 14The present invention provides an energy-saving heating unit based on feed water temperature adjustment, which reduces fuel loss by controlling the heat loss of the boiler 100, and can preheat the fuel according to the change of heat loss, accelerate the fuel consumption, and change the heat reflection condition inside the boiler 100.

[0069] In one embodiment, the energy-saving heating unit comprises:

[0070] The boiler 100 is added with fuel to heat the heating unit. A main steam desuperheater 200 is arranged outside the boiler 100. The steam generated by the boiler 100 enters the main steam desuperheater 200 to reduce the steam temperature. The steam after the temperature reduction is used by the user 300 to form condensed water. The condensed water enters the water supply regulating station 400 through the high-pressure water supply pipe and is supplied to the water supply system 500.

[0071] Connecting pipelines, connecting the boiler 100, the main steam desuperheater 200, the feed water regulating station 400 and the feed water system 500, forming a flow of steam from the boiler 100 to the feed water system 500;

[0072] The heat-insulating structure 600 is arranged inside the boiler 100. The heat-insulating structures 600 are combined to form the inner wall of the boiler 100. The steam pipe 700 is arranged between the heat-insulating structures 600. The steam pipe 700 is square and located between the gaps of the heat-insulating structures 600. The outer wall of the steam pipe 700 contacts the heat-insulating structure 600.

[0073] An adjustable reflector 900 is disposed on the upper part of the insulation structure 600 , and an adjusting structure 800 is disposed inside the reflector 900 to support the reflector 900 . The angle position of the reflector 900 is adjusted by the adjusting structure 800 to change the heat reflection inside the boiler 100 .

[0074] In this embodiment, by changing the state of the insulation structure 600, the heat loss of the boiler 100 can be adjusted during use. By adjusting the gap of the insulation structure 600, during the heating process of the boiler 100, the steam pipe 700 located between the gaps of the insulation structure 600 will accelerate the transmission of the internal temperature of the boiler 100, and the heating of the steam inside the steam pipe 700 by the inside of the boiler 100 is used to increase the temperature of the fuel entering the boiler 100.

[0075] The reflector 900 is arranged inside the boiler 100 to reflect heat, thereby controlling the heat change inside the boiler 100 and adjusting the heat concentration position to ensure the adjustment of the heat of the boiler 100 during use, thereby ensuring the use of the heat of the boiler 100 during use.

[0076] In one embodiment, the upper part of the boiler 100 is square and the lower part is circular. The reflective plate 900 moves along the inner wall of the boiler 100. The reflective plate 900 is triangular, and the upper inner wall of the boiler 100 forms a seal for the reflective plate 900. The reflective plate 900 is inserted into the interior of the boiler 100, and the inner wall of the boiler 100 forms a support for the reflective plate 900.

[0077] In this embodiment, the reflective plate 900 is set to control the concentrated position of the boiler 100 when in use, thereby changing the reflection position of the heat inside the boiler 100 during use, and according to the working condition of the boiler 100, the heat is concentrated in different positions to accurately control the feed water temperature.

[0078] The reflecting plate 900 is a four-sided cone inside the boiler 100 and is moved by the adjusting structure 800. The reflecting plate 900 has two upper and lower extreme positions inside the boiler 100. When the reflecting plate 900 moves to the upper or lower extreme position, the shape presented is symmetrical. When the reflecting plate 900 is at the lower extreme position, the heat of the boiler 100 diffuses from the middle to the outside, and when the reflecting plate 900 is at the upper extreme position, the heat of the boiler 100 diffuses from the surroundings.

[0079] In one embodiment, the steam pipe 700 extends from the outside of the boiler 100 to the inside of the boiler 100, and the inside of the steam pipe 700 is filled with medium water. The working heat of the boiler 100 is transferred to heat the medium water inside the steam pipe 700 into steam. The upper part of the steam pipe 700 extends from the inside of the boiler 100 to the feed port of the boiler 100 to heat the fuel.

[0080] The steam pipe 700 consists of a main heat pipe and an auxiliary heat pipe. The main heat pipe and the auxiliary heat pipe are respectively located at the lower and upper inner sides of the boiler 100 and embedded in the inner wall of the boiler 100. The main heat pipe and the auxiliary heat pipe are connected and arranged. The main heat pipe is distributed in a ring shape, and the auxiliary heat pipe is distributed in a square shape.

[0081] In this embodiment, the main heat pipe and the auxiliary heat pipe of the steam pipe 700 are respectively arranged in the upper and lower parts of the boiler 100. When the boiler 100 is working, the heating efficiency of the steam pipe 700 can be adjusted according to the position change of the reflection plate 900 to ensure the temperature of the steam flowing inside the steam pipe 700, so that the heat consumption of the boiler 100 can be faster. When the reflection plate 900 concentrates the heat of the boiler 100 and diffuses it outward from the middle, the heat will not be directly consumed in the auxiliary heat pipe, thereby improving the utilization of the heat inside the boiler 100.

[0082] The medium water inside the steam pipe 700 is heated into steam at the lower position of the boiler 100, and then moves upward from the inside of the steam pipe 700, flows inside the steam pipe 700, generates a cycle, and returns to the bottom of the steam pipe 700 to condense into water.

[0083] In one embodiment, the adjustment structure 800 includes:

[0084] The driving assembly 810 is installed on the upper part of the boiler 100. A traction part 820 is arranged on the outer side of the driving assembly 810. The traction part 820 extends into the interior of the boiler 100 and drives the reflecting plate 900 to move. The traction part 820 includes a traction plate 821. The traction plate 821 is hinged to one end of the reflecting plate 900 that is attached to the inner wall of the boiler 100. The traction plate 821 is located inside the boiler 100 and slides inside the boiler 100.

[0085] One reflector 900 is connected to at least two traction plates 821 , and the traction plates 821 are symmetrically arranged about the center line of the reflector 900 . At least two traction plates 821 connected to the same reflector 900 are arranged at the same height and move synchronously.

[0086] In this embodiment, a reflective plate 900 is connected to at least two traction plates 821. When in use, the reflective plate 900 can be driven to move synchronously from multiple positions to avoid the reflective plate 900 from being offset during the movement, which causes a height difference in the reflective plate 900 and affects the contact between the reflective plates 900. A socket for the reflective plate 900 to be extended and retracted is provided on the side of the reflective plate 900 away from the traction plate 821. The socket is opened in the boiler 100 and limits the position of one end of the reflective plate 900.

[0087] In one embodiment, the traction unit 820 further includes:

[0088] The hydraulic chamber 822 is opened inside the boiler 100, and the hydraulic chamber 822 penetrates the boiler 100 and extends to the inner wall of the boiler 100. A push rod 823 is arranged inside the hydraulic chamber 822 at an opening away from the driving assembly 810. The traction plate 821 is fixed to one end of the push rod 823 extending to the outside of the hydraulic chamber 822 and driven by the push rod 823. The hydraulic chamber 822 is filled with a medium.

[0089] The drive assembly 810 includes:

[0090] The driving motor 811 is fixed on the outside of the boiler 100, and a threaded tube 812 is arranged on the inside of the boiler 100. The threaded tube 812 and the driving motor 811 are meshed and transmitted through a gear 813. A hydraulic push rod 814 is arranged on the outside of the threaded tube 812. One end of the hydraulic push rod 814 extends into the hydraulic cavity 822 and squeezes the medium inside the hydraulic cavity 822. A transmission structure 815 is arranged between the threaded tube 812 and the hydraulic push rod 814 to drive the hydraulic push rod 814.

[0091] In this embodiment, the driving component 810 controls the push rod 823 by driving the hydraulic push rod 814 to move, and uses the push rod 823 to control the position of the traction plate 821, thereby adjusting the position of the extrusion plate. The transmission between the driving component 810 and the internal threaded tube 812 and the transmission between the threaded tube 812 and the hydraulic push rod 814 are both rigid transmissions, which can ensure accuracy during the transmission process, thereby ensuring stability during the transmission process.

[0092] In one embodiment, the transmission structure 815 includes:

[0093] The meshing wheel 816 is fixed to the outside of the hydraulic push rod 814, and the meshing wheel 816 and the outside of the threaded tube 812 are provided with meshing teeth that can mesh with each other. The threaded tube 812 rotates to drive the meshing wheel 816 to rotate, thereby rotating the hydraulic push rod 814;

[0094] One end of the hydraulic push rod 814 away from the hydraulic chamber 822 extends into the interior of the boiler 100 and is threadedly connected to the boiler 100. The rotation of the hydraulic push rod 814 is limited by the thread, so that the threaded push rod moves up and down during the rotation process.

[0095] The threaded tube 812 is formed by spiral winding, and the threaded tube 812 rotates at a different time from the meshing time of the meshing wheel 816. The threaded tube 812 drives the meshing wheel 816 to rotate and causes the reflector 900 to move in an offset manner.

[0096] In this embodiment, the threaded tube 812 is arranged in a threaded coil, and when the driving device drives the threaded tube 812 through the gear 813, the threaded tube 812 will mesh with and drive the meshing wheels 816 at different positions in sequence. Since the threaded tube 812 drives the meshing wheel 816 at different times, when the threaded tube 812 drives the meshing wheel 816, the reflective plate 900 will be misaligned when it moves, that is, the four reflective plates 900 will move at different times, thereby forming a misalignment of the movement of the reflective plates 900. Since the threaded tube 812 will also disengage from the meshing wheel 816 in sequence after rotation, when the threaded tube 812 rotates a specified number of times, the number of rotations of the meshing wheel 816 is the same, but the rotation time is inconsistent. Therefore, it can be ensured that the movement distance of each reflective plate 900 is consistent.

[0097] Since the meshing of the threaded tube 812 and the meshing wheel 816 can only drive the meshing wheel 816 to rotate, the meshing wheel 816 is fixed to the outside of the hydraulic push rod 814, and one end of the hydraulic push rod 814 is threadedly connected to the boiler 100. During the rotation of the hydraulic push rod 814, a height movement can be generated, thereby squeezing the hydraulic cavity 822 and using the medium to push the push rod 823 to move.

[0098] In one embodiment, the thermal insulation structure 600 includes:

[0099] A fixed insulation plate 601 and an adjustable insulation plate 602, wherein the fixed insulation plate 601 is fixed to the inner wall of the boiler 100 and contacts the steam pipe 700, and the adjustable insulation plate 602 is attached to the inner wall of the boiler 100 and contacts the steam pipe 700, and the fixed insulation plate 601 and the adjustable insulation plate 602 are coaxially arranged, and the inner walls of the fixed insulation plate 601 and the adjustable insulation plate 602 are located in the same arc surface;

[0100] The positioning ring 603 can be rotatably installed inside the boiler 100. The adjustable insulation plate 602 extends into the interior of the positioning ring 603 and rotates with the positioning ring 603 and can achieve height adjustment. The contact surface between the adjustable insulation plate 602 and the fixed insulation plate 601 is an inclined surface, and the limit block 604 is used to limit the adjustable insulation plate 602 and the fixed insulation plate 601 to always be in contact.

[0101] In this embodiment, the insulation plate is divided into a fixed one and an adjustable one. When adjusting the insulation structure 600, the position of the insulation plate can be controlled, thereby changing the position of the adjustable insulation plate 602. After the position of the adjustable insulation plate 602 is changed, the gap between the adjustable insulation plate 602 and the fixed insulation plate 601 can be adjusted.

[0102] The adjustable insulation plate 602 and the fixed insulation plate 601 appear in pairs. In a combination of a pair of adjustable insulation plates 602 and a fixed insulation plate 601, the limit block 604 can ensure that the inclined surfaces of the pair of adjustable insulation plates 602 and the fixed insulation plate 601 are always in contact, and a gap is generated between the adjustable insulation plate and the fixed insulation plate 601 that do not belong to a pair, and the steam pipe 700 is located between the gap.

[0103] In one embodiment, the thermal insulation structure 600 further includes:

[0104] A hydraulic system 605 is arranged outside the boiler 100. The hydraulic system 605 extends to the inside of the boiler 100 through a hydraulic pipeline. An arc block 606 for arc motion is arranged inside the boiler 100. The arc block 606 is driven by the hydraulic system 605.

[0105] The annular pipeline 607 is opened inside the boiler 100 , one end of the arc block 606 extends into the annular pipeline 607 , and the positioning ring 603 is fixed to the other end of the arc block 606 .

[0106] In this embodiment, the setting of the hydraulic system 605 can reduce the space required to drive the positioning ring 603. Installing the hydraulic system 605 on the outside of the boiler 100 can reduce the impact of the high temperature of the boiler 100 on the hydraulic system 605. The hydraulic oil is transported to the inside of the annular pipeline 607 through the hydraulic pipeline, and the arc block 606 is pushed outward by the hydraulic oil to rotate the positioning ring 603. During the rotation of the positioning ring 603, the adjustable insulation plate 602 is driven, and the limit block 604 fixed on the inclined surface of the adjustable insulation plate 602 extends to the fixed insulation plate 601 and is restricted by the fixed insulation plate 601, thereby changing the height position of the adjustable insulation.

[0107] When the height position of the heat-insulating plate 602 is adjusted to change, the heat-insulating plate 602 can be used to cover more steam pipes 700 , thereby reducing the area of ​​the steam pipes 700 exposed inside the boiler 100 .

[0108] The embodiment of the present application also provides a control method for an energy-saving heating unit, which is used to control the feed water temperature of the energy-saving heating unit, comprising the following steps:

[0109] Step 1: Set temperature sensors at the water supply position, steam pipe 700, and boiler 100 outlet of the heating unit to obtain the temperatures of the water supply position, steam pipe 700, and boiler 100 outlet;

[0110] Step 2: Obtain the change curve of the feed water temperature when the insulation structure 600 is adjusted to different positions of the boiler 100 during the combustion process of using different fuels, and the change curve of the feed water temperature when the reflector 900 is adjusted to different positions;

[0111] Step 3: Draw a change curve diagram through two change curves to analyze the effect of adjusting the insulation structure 600 and the reflector 900 on the change of the feed water temperature;

[0112] Step 4: Obtain a fuel consumption variation curve diagram when the heat preservation structure 600 and the reflector 900 are adjusted to different positions;

[0113] Step 5: Obtain the temperature changes of the fuel and feed water of the boiler 100 through two change curves, and adjust the positions of the insulation structure 600 and the reflector 900 according to the changes.

[0114] In one embodiment, the optimal operating condition of the boiler 100 can be obtained through two change curves, and the optimal positions of the insulation structure 600 and the reflector 900 when the optimal feed water temperature corresponding to the highest operating efficiency of the boiler 100 is determined.

[0115] In summary, the technical solutions disclosed in the above embodiments of the present invention have at least the following advantages:

[0116] 1. The present application changes the internal state of the boiler 100 and adds a thermal insulation structure 600 of the boiler 100. The temperature can be recovered during the heating process of the boiler 100. The heat generated during the heating process of the boiler 100 is used to heat the steam, and the steam is used to heat the fuel, thereby increasing the temperature of the fuel when it enters the boiler 100, thereby reducing the heat loss of the fuel.

[0117] 2. The insulation structure 600 arranged inside the boiler 100 can be adjusted to increase the gap between the insulation structures 600 and expose the steam pipe 700 in the gap between the insulation structures 600. The temperature of the boiler 100 will be directly transferred to the outside of the steam pipe 700 to heat the steam pipe 700, thereby increasing the temperature conduction of the steam pipe 700, accelerating the temperature consumption inside the boiler 100, and thus increasing the heat loss of the boiler 100.

[0118] 3. By controlling the insulation structure 600, the internal state of the boiler 100 can be adjusted during use, and the refraction angle of heat can be changed, so that the heat flow inside the boiler 100 can be adjusted, and then the corresponding heat changes can be changed, thereby controlling the heat consumption changes, ensuring accurate control of the feed water temperature, and increasing the change rate of the feed water temperature.

[0119] 4. The control method of the heating unit can be used to control the change in feed water temperature, thereby improving the speed of feed water temperature change and the control accuracy of feed water temperature. Combined with the insulation structure 600 inside the boiler 100, the insulation structure 600 and the temperature change inside the boiler 100 can be adjusted synchronously, thereby ensuring the fuel consumption during the use of the boiler 100.

[0120] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. Energy-saving heating unit based on feed water temperature adjustment, characterized in that: include: Boiler, add fuel to heat the heating unit, a main steam desuperheater is set outside the boiler, the steam generated by the boiler enters the main steam desuperheater to reduce the steam temperature, the cooled steam is used by the user to form condensed water, the condensed water enters the water supply regulating station through the high-pressure water supply pipe and is supplied to the water supply system; Connect the pipelines to connect the boiler, main steam desuperheater, feedwater regulating station and feedwater system to form the flow of steam from the boiler to the feedwater system; The heat-insulating structure is arranged inside the boiler, the heat-insulating structures are combined to form the inner wall of the boiler, steam pipes are arranged between the heat-insulating structures, the steam pipes are square and located between the gaps of the heat-insulating structures, and the outer wall of the steam pipes is in contact with the heat-insulating structure; An adjustable reflector is arranged on the upper part of the insulation structure, and an adjustment structure is arranged inside the reflector to support the reflector. The angle position of the reflector is adjusted by the adjustment structure to change the heat reflection inside the boiler. The adjustment structure includes: A driving assembly is installed on the upper part of the boiler. A traction part is arranged on the outer side of the driving assembly. The traction part extends into the interior of the boiler and drives the reflector to move. The traction part includes a traction plate. The traction plate is hinged to one end of the reflector that is attached to the inner wall of the boiler. The traction plate is located inside the boiler and slides inside the boiler. One reflector is connected to at least two traction plates, and the traction plates are symmetrically arranged about the center line of the reflector, and at least two traction plates connected to the same reflector are arranged at the same height and move synchronously; A hydraulic cavity is provided inside the boiler, and the hydraulic cavity penetrates the boiler and extends to the inner wall of the boiler. A push rod is arranged inside the hydraulic cavity at an opening away from the driving assembly. The traction plate is fixed to one end of the push rod extending outside the hydraulic cavity and is driven by the push rod. The hydraulic cavity is filled with a medium. The driving assembly includes: The driving motor is fixed on the outside of the boiler, a threaded tube is arranged on the inside of the boiler, and the threaded tube and the driving motor are driven by gear meshing. A hydraulic push rod is arranged on the outside of the threaded tube, one end of the hydraulic push rod extends into the hydraulic cavity and squeezes the medium inside the hydraulic cavity, and a transmission structure is arranged between the threaded tube and the hydraulic push rod to drive the hydraulic push rod.

2. The energy-saving heating unit based on feed water temperature adjustment according to claim 1, characterized in that: The upper part of the boiler is square and the lower part is round. The reflective plate moves along the inner wall of the boiler. The reflective plate is triangular, and the upper inner wall of the boiler forms a seal for the reflective plate. The reflective plate is inserted into the boiler, and the inner wall of the boiler forms a support for the reflective plate.

3. The energy-saving heating unit based on feed water temperature adjustment according to claim 2, characterized in that: The steam pipe extends from the outside of the boiler to the inside of the boiler, and the inside of the steam pipe is filled with medium water. The working heat of the boiler transfers the medium water inside the steam pipe to steam. The upper part of the steam pipe extends from the inside of the boiler to the boiler feed port to heat the fuel. The steam pipe consists of two parts: a main heat pipe and an auxiliary heat pipe. The main heat pipe and the auxiliary heat pipe are respectively located at the lower and upper inner sides of the boiler and embedded in the inner wall of the boiler. The main heat pipe and the auxiliary heat pipe are connected and arranged. The main heat pipe is distributed in a ring shape, and the auxiliary heat pipe is distributed in a square shape.

4. The energy-saving heating unit based on feed water temperature adjustment according to claim 3 is characterized in that: The transmission structure includes: The meshing wheel is fixed to the outside of the hydraulic push rod, and the meshing wheel and the outside of the threaded tube are provided with meshing teeth that can mesh with each other. The threaded tube rotates to drive the meshing wheel to rotate, thereby rotating the hydraulic push rod; One end of the hydraulic push rod away from the hydraulic chamber extends to the inside of the boiler and is connected to the boiler thread. The rotation of the hydraulic push rod is limited by the thread so that the threaded push rod moves up and down during the rotation process. The threaded tube is wound in a threaded shape, and the threaded tube rotates at a different time from the meshing time of the meshing wheel. The threaded tube drives the meshing wheel to rotate to cause the reflector to move in a dislocated manner.

5. The energy-saving heating unit based on feed water temperature adjustment according to claim 4, characterized in that: The insulation structure includes: A fixed insulation plate and an adjustable insulation plate, wherein the fixed insulation plate is fixed to the inner wall of the boiler and contacts the steam pipe, and the adjustable insulation plate is attached to the inner wall of the boiler and contacts the steam pipe, the fixed insulation plate and the adjustable insulation plate are coaxially arranged, and the inner walls of the fixed insulation plate and the adjustable insulation plate are located in the same arc surface; The positioning ring can be rotatably installed inside the boiler. The adjustable insulation plate extends into the interior of the positioning ring and rotates with the positioning ring and can realize height adjustment. The contact surface between the adjustable insulation plate and the fixed insulation plate is an inclined surface, and the adjustable insulation plate and the fixed insulation plate are always in contact with each other through a limit block.

6. The energy-saving heating unit based on feed water temperature adjustment according to claim 5, characterized in that: The insulation structure also includes: A hydraulic system is arranged outside the boiler, and the hydraulic system extends to the inside of the boiler through a hydraulic pipeline. An arc block for arc motion is arranged inside the boiler, and the arc block is driven by the hydraulic system; The annular pipeline is opened inside the boiler, one end of the arc block extends into the annular pipeline, and the positioning ring is fixed to the other end of the arc block.

7. A control method for an energy-saving heating unit, used for an energy-saving heating unit based on feed water temperature adjustment as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Set temperature sensors at the water supply position, steam pipe, and boiler outlet of the heating unit to obtain the temperatures of the water supply position, steam pipe, and boiler outlet; Step 2: obtaining a change curve of the feed water temperature when the insulation structure is adjusted to different positions of the boiler during combustion of different fuels, and a change curve of the feed water temperature when the reflector is adjusted to different positions; Step 3: Draw a change curve diagram through two change curves to analyze the effect of adjusting the insulation structure and the reflector on the change of the feed water temperature; Step 4: Obtain a fuel consumption variation curve diagram when the insulation structure and the reflector are adjusted to different positions; Step 5: Obtain the temperature changes of the boiler's fuel and feed water through two change curves, and adjust the positions of the insulation structure and the reflector according to the changes.

8. The control method of an energy-saving heating unit according to claim 7, characterized in that: The optimal operating condition of the boiler can be obtained through the two change curves, and the optimal positions of the insulation structure and the reflector when the optimal feed water temperature corresponding to the highest boiler operating efficiency is determined.

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