Boiler waste heat utilization device

Abstract

The utility model discloses a boiler waste heat utilization device which comprises a horizontal flue part communicated with a boiler, an ORC power generation system communicated with the horizontal flue part through a first water circulation pipeline, and an external cooling pond communicated with the ORC power generation system through a second water circulation pipeline. According to the boiler waste heat utilization device, the guiding structure is arranged in the horizontal flue to replace an active working part, flue gas can automatically carry fly ash to fly out of the flue, heat in the flue gas can be effectively utilized, the complexity of an inner channel of the horizontal flue is reduced, and the utilization efficiency of the flue gas is improved. And the maintenance and repair cost of the product can be effectively reduced, the heat utilization effect is improved, and the development and progress of the industry are well promoted.

Description

Technical Field

[0001] This application relates to the field of boiler waste heat, and more specifically to a boiler waste heat utilization device. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. Commonly used industrial boilers today include coal-fired boilers and biomass boilers. When coal or biomass fuel is burned in the furnace, a large amount of high-temperature flue gas is produced. The fly ash particles carried by the flue gas accumulate in the flue and on the heating surface tubes, forming ash deposits. This is especially true in long horizontal flues, where changes in the flow field cause fly ash particles to easily accumulate, forming an ash layer. Thick ash accumulation in horizontal flues increases ventilation resistance, leading to increased power consumption of the forced draft fan and induced draft fan. In severe cases, it can even cause deformation or breakage of the horizontal flue due to temperature differences. Therefore, existing horizontal flues are generally equipped with soot blowing devices to clean the ash accumulation on the internal heating surfaces. However, existing soot blowing devices mainly involve setting up corresponding equipment inside the horizontal flue to clean its inner wall. The installation of the equipment not only increases the complexity of the internal channels of the horizontal flue and further affects the normal discharge of flue gas, but also increases the maintenance difficulty and repair cost of this part of the structure because its active working part is installed inside the horizontal flue. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides a boiler waste heat utilization device. By setting a guiding structure inside the horizontal flue instead of the active working part, the flue gas can carry fly ash out of the flue by itself, and the heat in the flue gas can be effectively utilized. This not only reduces the complexity of the internal channels of the horizontal flue, but also effectively reduces the maintenance and repair costs of the product, improves the heat utilization effect, and greatly promotes the development and progress of the industry.

[0004] A boiler waste heat utilization device includes a horizontal flue section connected to the boiler, an ORC power generation system connected to the horizontal flue section via a first water circulation pipe, and an external cooling pool connected to the ORC power generation system via a second water circulation pipe.

[0005] Furthermore, the horizontal flue section includes a horizontal flue connected to the boiler, a spiral generator section disposed inside the horizontal flue, several spiral maintenance sections disposed inside the horizontal flue and located after the spiral generator section, several soot blowing sections disposed on the lower side of the horizontal flue, a swirling heat exchange channel disposed within the spiral generator section and the spiral maintenance section, and several heat exchange branch pipes for connecting the swirling heat exchange channel to the first water circulation pipeline; each soot blowing section is provided with a matching air curtain fan; several ash discharge ports cooperating with the soot blowing sections are provided inside the horizontal flue, and a guide slope for guiding part of the flue gas into the ash discharge port is provided above the ash discharge port, and the ash discharge port is located behind the spiral generator section and the spiral maintenance section, and only one ash discharge port is provided between the spiral generator section and the spiral maintenance section and between any two adjacent spiral maintenance sections.

[0006] Preferably, the spiral generating section is located at the inlet of the horizontal flue; the distance between any one of the spiral maintaining sections and the adjacent spiral generating section or another spiral maintaining section is 5-12 meters.

[0007] Preferably, the spiral generating section consists of a tubular outer ring, a generating conical column located at the center of the outer ring and coaxial with it, and several generating guide vanes surrounding the generating conical column; the generating guide vanes are provided with a swirling heat exchange channel, and the outlet and inlet of the swirling heat exchange channel are both located on the contact surface between the generating guide vanes and the outer ring.

[0008] Preferably, the outer diameter of the outer ring of the generator part is the same as the inner diameter of the horizontal flue, and the outer ring of the generator part and the horizontal flue are integrally formed.

[0009] The front section of the generating cone column is conical and the rear section is cylindrical, and the front section of the generating cone column is set facing the inlet direction of the horizontal flue.

[0010] One end of the generating guide vane is fixedly integrated with the generating conical column, and the other end is fixedly integrated with the outer ring of the generating part. The angle between the generating guide vane and the central axis of the generating conical column is 40-50°. The generating guide vane is a metal structure with excellent thermal conductivity.

[0011] Preferably, the spiral support section consists of a tubular support outer ring, a support conical column located at the center of the support outer ring and coaxial with the support outer ring, a plurality of support guide vanes surrounding the support conical column, and a plurality of support rods surrounding the outer side of the support outer ring; the support guide vanes are provided with a spiral heat exchange channel, and the outlet and inlet of the spiral heat exchange channel are both located on the contact surface between the support guide vanes and the outer ring of the generating section.

[0012] Preferably, the outer diameter of the outer ring of the retaining part is smaller than the inner diameter of the horizontal flue;

[0013] The support rod is arranged radially along the outer ring of the support part, with one end fixed to the outer ring of the support part and the other end fixed to the horizontal flue.

[0014] The front section of the maintaining conical column is conical and the rear section is cylindrical, and the front section of the maintaining conical column is set facing the inlet direction of the horizontal flue.

[0015] One end of the maintaining air guide is fixed to the maintaining conical column, and the other end is fixed to the outer ring of the maintaining part. The angle between the maintaining air guide and the central axis of the maintaining conical column is 40-50°. The maintaining air guide is a metal structure with excellent thermal conductivity.

[0016] Preferably, the soot blowing section consists of an upper box and a lower box that are arranged vertically and connected to each other, an air inlet located on the top left side of the upper box and connected to the ash discharge port through a mixing air duct, an air outlet located on the top right side wall of the upper box and connected to an air outlet duct, a partition air guide plate located on the inner side of the top of the upper box and located between the air inlet and the air outlet, an air curtain opening located on the left side wall of the upper box, a double-sided slope block located on the inner side of the right side wall of the upper box, a rotating shaft located in the lower box, four space partition plates evenly distributed on the rotating shaft, and an ash hopper located at the bottom of the lower box.

[0017] The air curtain machine is installed on the left side wall of the upper housing, and the air curtain outlet of the air curtain machine is set in correspondence with the air curtain opening. The air curtain blown out by the air curtain machine is blown horizontally to the right side wall of the upper housing after passing through the air curtain opening.

[0018] A stepper motor capable of driving the rotating shaft to rotate at a fixed angle is connected to the rotating shaft;

[0019] The left side of the partition air guide plate is a vertical surface parallel to the left side wall of the upper box, and the right side of the partition air guide plate is an arc-shaped surface that guides the air outlet.

[0020] The horizontal distance between the air curtain opening and the partition air guide plate is greater than or equal to the distance between the partition air guide plate and the left side wall of the upper box.

[0021] The upper and lower sides of the double-sided slope block are arc-shaped slopes symmetrically arranged with its central face dividing the surface, and the horizontal position of the central dividing surface of the double-sided slope block is higher than or equal to the upper position of the air curtain opening.

[0022] The rotating shaft runs through the lower housing from front to back;

[0023] The front and rear ends of the space divider abut against the front and rear sides of the lower box, respectively. The top of the space divider on the upper side abuts against the lower end of the right side wall of the upper box, and the top of the space divider on the left side abuts against the left side wall of the lower box.

[0024] Preferably, after some of the heat exchange branch pipes pass through the horizontal flue and the outer ring of the generator section, the inlet and outlet of the spiral heat exchange channel set inside the generator guide vane are connected to the outlet and return water pipes of the first water circulation pipeline, respectively.

[0025] Meanwhile, the other part of the heat exchange branch pipe passes through the horizontal flue, the central axis of the support rod and the outer ring of the maintenance part, and connects the inlet and outlet of the spiral heat exchange channel set in the air guide vane to the outlet pipe and return pipe of the first water circulation pipeline, respectively.

[0026] Preferably, the ORC power generation system consists of an evaporator connected to a horizontal flue section via a first water circulation pipeline, a condenser connected to the evaporator via a working fluid circulation pipeline, a centripetal expander connected in series to the return pipe of the working fluid circulation pipeline, and a generator connected to the centripetal expander.

[0027] A first water pump is installed on the outlet pipe of the first water circulation pipeline, a working fluid pump is installed on the outlet pipe of the working fluid circulation pipeline, and a second water pump is installed on the outlet pipe of the second water circulation pipeline.

[0028] Compared with the prior art, the embodiments of this application have the following beneficial effects:

[0029] This invention replaces the active working part with a guiding structure inside the horizontal flue, which allows the flue gas to carry fly ash out of the flue by itself, and effectively utilizes the heat in the flue gas. This not only reduces the complexity of the internal channels of the horizontal flue, but also effectively reduces the maintenance and repair costs of the product, improves the heat utilization effect, and greatly promotes the development and progress of the industry.

[0030] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0031] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0032] Figure 1 This is a structural block diagram of the present invention.

[0033] Figure 2 This is a cross-sectional structural diagram of the horizontal flue section of this utility model.

[0034] Figure 3 This is a front structural diagram of the spiral generating part of this utility model.

[0035] Figure 4 This is a front structural diagram of the spiral support part of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1000, Horizontal flue section;

[0038] 1100. Horizontal flue; 1101. Ash discharge port; 1102. Guide slope;

[0039] 1200, Spiral Generator; 1201, Outer Ring of Generator; 1202, Generator Conical Column; 1203, Generator Guide Vane;

[0040] 1300, Spiral support section; 1301, Outer ring of support section; 1302, Supporting conical column; 1303, Supporting guide vane; 1304, Support rod;

[0041] 1400. Soot blowing section; 1401. Mixing duct; 1402. Air inlet; 1403. Air outlet; 1404. Air guide plate; 1405. Air curtain outlet; 1406. Double-sided slope block; 1407. Air outlet duct; 1408. Rotating shaft; 1409. Space partition plate; 1410. Ash hopper; 1411. Upper housing; 1412. Lower housing;

[0042] 1500, Air curtain machine;

[0043] 1600, spiral heat exchange channel;

[0044] 1700, heat exchange branch pipe;

[0045] 2000, ORC power generation system;

[0046] 2100, Evaporator; 2200, Condenser; 2300, Centripetal Expander; 2400, First Water Pump; 2500, Working Fluid Pump; 2600, Generator; 2700, Second Water Pump;

[0047] 3000, External cooling pool. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0049] It should be noted that if the terms "first," "second," etc., are used in the specification, claims, and accompanying drawings of this application, they are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] In this application, when terms such as "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" are used, they indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0051] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0052] Furthermore, in this application, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] Example 1

[0055] like Figure 1As shown, a boiler waste heat utilization device includes a horizontal flue section 1000 connected to the boiler, an ORC power generation system 2000 connected to the horizontal flue section 1000 via a first water circulation pipe, and an external cooling pool 3000 connected to the ORC power generation system 2000 via a second water circulation pipe.

[0056] The overall structure of the ORC power generation system is existing technology. The main innovation of this embodiment lies in the structural improvement of the horizontal flue section, and the collection of soot and absorption of waste heat from the flue gas are accomplished through the improved structure.

[0057] like Figure 2 As shown, the horizontal flue section 1000 includes a horizontal flue 1100 connected to the boiler, a spiral generator 1200 disposed inside the horizontal flue 1100, several spiral maintaining sections 1300 disposed inside the horizontal flue 1100 and located after the spiral generator 1200, several soot blowing sections 1400 disposed on the lower side of the horizontal flue 1100, a spiral heat exchange channel 1600 disposed within the spiral generator 1200 and the spiral maintaining sections 1300, and several heat exchange branch pipes 1700 groups for connecting the spiral heat exchange channel 1600 to the first water circulation pipeline. Each of the soot blowing sections 1400 is provided with a corresponding air curtain machine 1500; the horizontal flue 1100 is provided with a plurality of ash discharge ports 1101 that cooperate with the soot blowing sections 1400, and a guide slope 1102 for guiding part of the flue gas into the ash discharge port 1101 is also provided above the ash discharge port 1101, and the ash discharge port 1101 is located behind the spiral generating section 1200 and the spiral maintaining section 1300, and only one ash discharge port 1101 is provided between the spiral generating section 1200 and the spiral maintaining section 1300 and between any two adjacent spiral maintaining sections 1300.

[0058] The guide slope will have a counteracting effect on the spiral movement of flue gas. Therefore, when setting it up, the distance between the guide slope and the inner wall of the horizontal flue should be controlled within 5cm. This will not only effectively capture fly ash particles, but also ensure the existence of the spiral movement of flue gas, so that the ash in the flue gas can always adhere to the inner wall of the horizontal flue under the action of centrifugal force.

[0059] The spiral generating part 1200 is located at the inlet of the horizontal flue 1100; the distance between any one of the spiral maintaining parts 1300 and the adjacent spiral generating part 1200 or another spiral maintaining part 1300 is 5-12 meters.

[0060] The specific spacing mentioned above needs to be adjusted according to the flow rate of the smoke flowing through the horizontal flue. The higher the smoke flow rate, the longer the spacing should be, and vice versa.

[0061] like Figure 3As shown, the spiral generating section 1200 consists of a tubular outer ring 1201, a generating conical column 1202 located at the center of the outer ring 1201 and coaxial with it, and a plurality of generating guide vanes 1203 surrounding the generating conical column 1202; a spiral heat exchange channel 1600 is provided inside the generating guide vane 1203, and the outlet and inlet of the spiral heat exchange channel 1600 are both located on the contact surface between the generating guide vane 1203 and the outer ring 1201.

[0062] The outer diameter of the outer ring 1201 of the generating part is the same as the inner diameter of the horizontal flue 1100, and the outer ring 1201 of the generating part and the horizontal flue 1100 are integrally formed.

[0063] The front section of the generating cone column 1202 is conical and the rear section is cylindrical, and the front section of the generating cone column 1202 is set facing the inlet direction of the horizontal flue 1100;

[0064] One end of the generating guide vane 1203 is fixedly integrated with the generating conical column 1202, and the other end is fixedly integrated with the outer ring 1201 of the generating part. The angle between the generating guide vane 1203 and the central axis of the generating conical column 1202 is 45°. The generating guide vane 1203 is a metal structure with excellent thermal conductivity.

[0065] After the smoke enters the horizontal flue, it first passes through the spiral generator. Guided by the air guide vanes, the smoke moves backward at a 45° angle, causing the smoke within the entire horizontal flue to move backward in a spiral motion. Due to centrifugal force, the ash in the smoke is thrown towards the sidewall of the horizontal flue, effectively causing the ash to accumulate near the sidewall and spiral forward with the smoke. It should be noted that the horizontal flue described in this embodiment is not the heat conversion section of the boiler, but a flue structure used for exhausting smoke. The main function of this embodiment is to collect ash from the smoke and residual heat after conversion.

[0066] like Figure 3 As shown, the spiral maintaining part 1300 consists of a tubular maintaining part outer ring 1301, a maintaining conical column 1302 located at the center of the maintaining part outer ring 1301 and coaxial with the maintaining part outer ring 1301, a plurality of maintaining air guide vanes 1303 surrounding the maintaining conical column 1302, and a plurality of support rods 1304 surrounding the outer side of the maintaining part outer ring 1301; a spiral heat exchange channel 1600 is provided inside the maintaining air guide vane 1303, and the outlet and inlet of the spiral heat exchange channel 1600 are both located on the contact surface between the maintaining air guide vane 1303 and the generating part outer ring 1201.

[0067] The outer diameter of the outer ring 1301 of the maintaining part is smaller than the inner diameter of the horizontal flue 1100;

[0068] The support rod 1304 is arranged radially along the outer ring 1301 of the support part. One end of the support rod 1304 is fixed to the outer ring 1301 of the support part, and the other end is fixed to the horizontal flue 1100.

[0069] The front section of the maintaining conical column 1302 is conical and the rear section is cylindrical, and the front section of the maintaining conical column 1302 is set facing the inlet direction of the horizontal flue 1100;

[0070] One end of the maintaining air guide 1303 is fixedly integrated with the maintaining conical column 1302, and the other end is fixedly integrated with the outer ring 1301 of the maintaining part. The angle between the maintaining air guide 1303 and the central axis of the maintaining conical column 1302 is 45°. The maintaining air guide 1303 is a metal structure with excellent thermal conductivity.

[0071] As the spiraling smoke passes through the spiral support section, some of the ash-laden smoke in the outer layer will be discharged from the horizontal flue through the ash discharge port under the guidance of the guide slope. The remaining smoke in the outer layer will continue to spiral backward through the gap between the outer ring of the support section and the horizontal flue. The smoke in the center will continue to move backward at a 45° angle under the guidance of the support guide vanes, thus better maintaining the spiral movement of the smoke and ensuring that the ash always accumulates in the outer ring under the action of centrifugal force.

[0072] The soot blowing unit 1400 consists of an upper box 1411 and a lower box 1412 that are arranged vertically and interconnected, an air inlet 1402 located on the top left side of the upper box 1411 and connected to the ash discharge port 1101 via a mixing air duct 1401, an air outlet 1403 located on the top right side wall of the upper box 1411 and connected to an air outlet duct 1407, a partition air guide plate 1404 located on the inner side of the top of the upper box 1411 and between the air inlet 1402 and the air outlet 1403, an air curtain 1405 located on the left side wall of the upper box 1411, a double-sided slope block 1406 located on the inner side of the right side wall of the upper box 1411, a rotating shaft 1408 located in the lower box 1412, four space partition plates 1409 evenly distributed on the rotating shaft 1408, and an ash hopper 1410 located at the bottom of the lower box 1412.

[0073] During setup, the exhaust duct can be connected to the dust collector or directly introduced into the end of the horizontal flue, depending on actual needs.

[0074] The air curtain machine 1500 is installed on the left side wall of the upper housing 1411, and the air curtain outlet of the air curtain machine 1500 is correspondingly set with the air curtain opening 1405. The air curtain blown out by the air curtain machine 1500 is blown horizontally to the right side wall of the upper housing 1411 after passing through the air curtain opening 1405.

[0075] A stepper motor capable of driving the rotating shaft 1408 to rotate at a fixed angle is connected to the rotating shaft 1408.

[0076] The left side of the partition air guide plate 1404 is a vertical surface parallel to the left side wall of the upper box 1411, and the right side of the partition air guide plate 1404 is an arc-shaped surface of the arc-shaped guide air outlet 1403.

[0077] The horizontal distance between the air curtain opening 1405 and the partition air guide plate 1404 is greater than or equal to the distance between the partition air guide plate 1404 and the left side wall of the upper box 1411.

[0078] The upper and lower sides of the double-sided slope block 1406 are arc-shaped slopes symmetrically arranged with its central face dividing the surface, and the horizontal position of the central dividing surface of the double-sided slope block 1406 is higher than or equal to the upper position of the air curtain opening 1405.

[0079] The rotating shaft 1408 passes through the lower housing 1412 from front to back;

[0080] The front and rear ends of the space partition 1409 abut against the front and rear sides of the lower box 1412, respectively. The top of the space partition 1409 located on the upper side abuts against the lower end of the right side wall of the upper box 1411, and the top of the space partition 1409 located on the left side abuts against the left side wall of the lower box 1412.

[0081] After the flue gas carrying a large amount of ash enters the upper chamber, it first moves vertically downward through the channel formed by the left side wall of the upper chamber and the left side wall of the partition guide plate. Due to the presence of the air curtain in the middle of the upper chamber, the incoming flue gas will move to the right with the help of the air curtain, while the ash will enter the air curtain due to inertia. When the flue gas and the air curtain move to the double-sided slope, the flue gas will move upward under the guidance of the upper arc-shaped slope and finally enter the air outlet duct through the air outlet. The air curtain will move downward under the guidance of the lower arc-shaped slope and finally cause the ash to fall onto the space partition plate. The space partition plate will rotate with the rotation of the rotating shaft and finally cause the ash to be collected and discharged by the ash hopper.

[0082] The heat exchange branch pipe 1700, after passing through the horizontal flue 1100 and the outer ring 1201 of the generator section, connects the inlet and outlet of the spiral heat exchange channel 1600 set in the generator guide vane 1203 to the outlet pipe and return pipe of the first water circulation pipeline, respectively.

[0083] Meanwhile, another part of the heat exchange branch pipe 1700 passes through the horizontal flue 1100, the central axis of the support rod 1304 and the outer ring 1301 of the maintenance part, and connects the inlet and outlet of the spiral heat exchange channel 1600 set in the maintenance guide vane 1303 to the outlet pipe and return pipe of the first water circulation pipeline, respectively.

[0084] The preferred configuration is to position the inlet and outlet of the swirling heat exchange channel at the rear and front ends of the outer surface of the generating or maintaining guide vanes, respectively. This allows the liquid to move from the "low-heat zone" to the "high-heat zone," improving heat exchange efficiency and effectiveness. Simultaneously, the support rod is also adjusted according to the angle of the maintaining guide vanes, effectively reducing the support rod's wind resistance and further enhancing the efficiency and effectiveness of flue gas movement.

[0085] The ORC power generation system 2000 consists of an evaporator 2100 connected to a horizontal flue section 1000 via a first water circulation pipeline, a condenser 2200 connected to the evaporator 2100 via a working fluid circulation pipeline, a centripetal expander 2300 connected in series to the return pipe of the working fluid circulation pipeline, and a generator 2600 connected to the centripetal expander 2300.

[0086] A first water pump 2400 is installed on the outlet pipe of the first water circulation pipeline, a working fluid pump 2500 is installed on the liquid outlet pipe of the working fluid circulation pipeline, and a second water pump 2700 is installed on the outlet pipe of the second water circulation pipeline.

[0087] All components involved in the aforementioned ORC power generation system are existing technologies, and their setup and usage are common knowledge in the field. Those skilled in the art can set up and use them without creative effort, so they will not be described in detail here.

[0088] Example 2

[0089] The difference between this embodiment and embodiment 1 is that the included angle between the wind-generating guide vane 203 and the central axis of the wind-generating conical column 202 is 40°.

[0090] The angle between the guide vane 303 and the central axis of the conical column 302 is maintained at 40°.

[0091] Example 3

[0092] The only difference between this embodiment and Embodiment 1 is that the included angle between the wind-generating guide vane 203 and the central axis of the wind-generating conical column 202 is 50°.

[0093] The angle between the guide vane 303 and the central axis of the conical column 302 is maintained at 50°.

[0094] It should be noted that all features disclosed in this specification, or all steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0095] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A boiler waste heat utilization device characterized by comprising: The application relates to a boiler system, which comprises a horizontal flue (1000) connected with a boiler, an ORC power generation system (2000) connected with the horizontal flue (1000) through a first water circulation pipeline, and an external cooling pool (3000) connected with the ORC power generation system (2000) through a second water circulation pipeline. The horizontal flue (1000) comprises a horizontal flue (1100) connected with the boiler, a spiral generating part (1200) arranged in the horizontal flue (1100), a plurality of spiral maintaining parts (1300) arranged in the horizontal flue (1100) and located behind the spiral generating part (1200), a plurality of soot blowing parts (1400) arranged at the lower side of the horizontal flue (1100), a spiral heat exchange channel (1600) arranged in the spiral generating part (1200) and the spiral maintaining part (1300), and a plurality of heat exchange branch pipes (1700) for connecting the spiral heat exchange channel (1600) with the first water circulation pipeline; each soot blowing part (1400) is provided with a wind curtain machine (1500) matched with the soot blowing part (1400); the horizontal flue (1100) is provided with a plurality of ash discharge ports (1101) matched with the soot blowing parts (1400), the ash discharge ports (1101) are further provided with air guide slopes (1102) for guiding part of flue gas into the ash discharge ports (1101), the ash discharge ports (1101) are arranged behind the spiral generating part (1200) and the spiral maintaining part (1300), and only one ash discharge port (1101) is arranged between the spiral generating part (1200) and the spiral maintaining part (1300) or between any two adjacent spiral maintaining parts (1300).

2. A boiler waste heat utilization device according to claim 1, characterized in that The spiral generating part (1200) is arranged at the inlet of the horizontal flue (1100); the distance between any spiral maintaining part (1300) and the adjacent spiral generating part (1200) or another spiral maintaining part (1300) is 5-12m.

3. A boiler waste heat utilization device according to claim 2, characterized in that The spiral generating part (1200) comprises a tubular generating part outer ring (1201), a generating conical column (1202) arranged at the center of the generating part outer ring (1201) and coaxial with the generating part outer ring (1201), and a plurality of generating air guide wings (1203) arranged around the generating conical column (1202); the spiral heat exchange channel (1600) is arranged in the generating air guide wing (1203), and the outlet and the inlet of the spiral heat exchange channel (1600) are arranged on the contact surface of the generating air guide wing (1203) and the generating part outer ring (1201).

4. A boiler waste heat utilization device according to claim 3, characterized in that, The outer diameter of the generating part outer ring (1201) is the same as the inner diameter of the horizontal flue (1100), and the generating part outer ring (1201) is integrated with the horizontal flue (1100); The front section of the generating conical column (1202) is conical, the rear section is cylindrical, and the front section of the generating conical column (1202) faces the inlet direction of the horizontal flue (1100). The generating guide vane (1203) is integrally connected with the generating conical column (1202) at one end and with the generating part outer ring (1201) at the other end, and the angle between the generating guide vane (1203) and the central axis of the generating conical column (1202) is 40-50°, and the generating guide vane (1203) is a metal structure with excellent heat conduction performance.

5. A boiler waste heat utilization device according to claim 2, characterized in that, The spiral maintaining part (1300) is composed of a maintaining part outer ring (1301) in a tubular shape, a maintaining conical column (1302) arranged at the center of the maintaining part outer ring (1301) and coaxial with the maintaining part outer ring (1301), a plurality of maintaining guide vanes (1303) arranged around the maintaining conical column (1302), and a plurality of support rods (1304) arranged around the outside of the maintaining part outer ring (1301); the maintaining guide vane (1303) is internally provided with a spiral heat exchange channel (1600), and the outlet and the inlet of the spiral heat exchange channel (1600) are arranged on the contact surface between the maintaining guide vane (1303) and the generating part outer ring (1201).

6. A boiler waste heat utilization device according to claim 5, characterized in that The outer diameter of the maintaining part outer ring (1301) is smaller than the inner diameter of the horizontal flue (1100); The support rod (1304) is arranged along the radial direction of the maintaining part outer ring (1301), one end of the support rod (1304) is fixed to the maintaining part outer ring (1301), and the other end is fixed to the horizontal flue (1100); The front section of the maintaining conical column (1302) is conical, and the rear section is cylindrical, and the front section of the maintaining conical column (1302) is arranged to face the inlet direction of the horizontal flue (1100); The maintaining guide vane (1303) is integrally connected with the maintaining conical column (1302) at one end and with the maintaining part outer ring (1301) at the other end, and the angle between the maintaining guide vane (1303) and the central axis of the maintaining conical column (1302) is 40-50°, and the maintaining guide vane (1303) is a metal structure with excellent heat conduction performance.

7. A boiler waste heat utilization device according to claim 1, characterized in that, The soot blowing part (1400) is composed of an upper box body (1411) and a lower box body (1412) arranged above and below and in communication with each other, an air inlet (1402) arranged at the top left side of the upper box body (1411) and connected to the ash discharge port (1101) through a mixed air pipe (1401), an air outlet (1403) arranged at the top right side wall of the upper box body (1411) and connected with an air outlet pipe (1407), a separation air guide plate (1404) arranged inside the top of the upper box body (1411) and located between the air inlet (1402) and the air outlet (1403), an air curtain port (1405) arranged on the left side wall of the upper box body (1411), a double-sided slope block (1406) arranged inside the right side wall of the upper box body (1411), a rotating shaft (1408) arranged in the lower box body (1412), four space separation pieces (1409) evenly distributed on the rotating shaft (1408), and an ash leakage chute (1410) arranged at the bottom end of the lower box body (1412). The air curtain machine (1500) is arranged on the left side wall of the upper box body (1411), and an air curtain outlet of the air curtain machine (1500) is arranged correspondingly with the air curtain opening (1405); the air curtain blown by the air curtain machine (1500) blows horizontally to the right side wall of the upper box body (1411) through the air curtain opening (1405); The rotating shaft (1408) is connected with a stepping motor capable of driving the rotating shaft (1408) to rotate at a fixed angle; The left side of the separation air guide plate (1404) is a vertical surface parallel to the left side wall of the upper box body (1411), and the right side of the separation air guide plate (1404) is an arc surface corresponding to the arc-shaped air outlet (1403); The horizontal distance between the air curtain opening (1405) and the separation air guide plate (1404) is greater than or equal to the distance between the separation air guide plate (1404) and the left side wall of the upper box body (1411); The upper and lower sides of the double-sided slope block (1406) are arc-shaped slope surfaces symmetrically arranged with the center surface as a dividing surface, and the horizontal position of the center dividing surface of the double-sided slope block (1406) is higher than or equal to the upper end position of the air curtain opening (1405); The rotating shaft (1408) penetrates through the lower box body (1412) from front to back; The front and back ends of the space separation piece (1409) are respectively abutted against the front side and the back side of the lower box body (1412), the top end of the space separation piece (1409) on the upper side is abutted against the lower end of the right side wall of the upper box body (1411), and the top end of the space separation piece (1409) on the left side is abutted against the left side wall of the lower box body (1412).

8. A boiler waste heat utilization device according to claim 7, characterized in that Part of the heat exchange branch pipes (1700) penetrate through the horizontal flue (1100) and the outer ring (1201) of the generating part, and then connect the inlet and outlet of the spiral heat exchange channel (1600) arranged in the generating air wing (1203) to the water outlet pipe and the water return pipe of the first water circulation pipeline respectively; Meanwhile, another part of the heat exchange branch pipes (1700) penetrate through the horizontal flue (1100), the central shaft of the supporting rod (1304), and the outer ring (1301) of the maintaining part, and then connect the inlet and outlet of the spiral heat exchange channel (1600) arranged in the maintaining air wing (1303) to the water outlet pipe and the water return pipe of the first water circulation pipeline respectively.

9. A boiler waste heat utilization device according to claim 8, characterized in that, The ORC power generation system (2000) is composed of an evaporator (2100) connected with the horizontal flue part (1000) through the first water circulation pipeline, a condenser (2200) connected with the evaporator (2100) through the working medium circulation pipeline, a centrifugal expander (2300) connected in series on the liquid return pipe of the working medium circulation pipeline, and a generator (2600) connected with the centrifugal expander (2300). A first water pump (2400) is arranged on the water outlet pipe of the first water circulation pipeline, a working medium pump (2500) is arranged on the liquid outlet pipe of the working medium circulation pipeline, and a second water pump (2700) is arranged on the water outlet pipe of the second water circulation pipeline.

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