Efficient power generation boiler based on low-rank pulverized coal hydrogen-doped ammonia clean combustion

Abstract

The invention discloses an efficient power generation boiler based on low-rank pulverized coal hydrogen-doped ammonia clean combustion, and relates to the technical field of power generation boilers. The power generation boiler comprises a power generation boiler body, one side of the power generation boiler body is provided with a water tank, one side of the water tank communicates with a water outlet pipe, and the lower side of the water tank communicates with a water inlet pipe. Through the arranged rotary knob, a user can conveniently control the insertion rod to be inserted into or separated from the insertion groove, so that the user can conveniently mount or dismount the sliding frame, and then the filter screen in the sliding frame is replaced or cleaned, so that the cleaning efficiency of the filter screen is improved, and the phenomenon that the filter screen is damaged due to low cleaning speed is reduced. And through the arranged filter screen, cold backflow water vapor can be filtered, so that the impurity content is reduced, and then the situation that scale is generated in the water tank is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of power generation boilers, and in particular relates to a high-efficiency power generation boiler based on the clean combustion of low-grade coal powder mixed with hydrogen and ammonia. Background Art

[0002] As one of the core equipment in a power plant, the power plant boiler plays a key role in energy conversion. By converting the chemical energy of the fuel into thermal energy, it heats the water in the boiler to generate superheated steam with specific parameters (steam temperature and pressure) and sufficient flow, providing the power source for the operation of the steam turbine.

[0003] Currently, power generation boilers generally adopt a water recycling structure. This design effectively realizes the recycling of water resources and significantly improves water-saving benefits. However, during long-term operation, the inner wall of the water tank is prone to scale due to changes in water quality. These scales will gradually adhere to the inner wall of the container to form a dense attachment layer. Due to the complex internal space structure of the water tank, conventional cleaning methods are difficult to completely remove the scale, resulting in difficult and inefficient manual cleaning operations. If not handled in a timely manner, the continued accumulation of scale will have an adverse effect on the heat exchange efficiency of the boiler, thereby threatening the stability and economy of equipment operation, becoming a major factor restricting the efficient and safe operation of power plants.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a high-efficiency power generation boiler based on the clean combustion of low-grade coal mixed with hydrogen and ammonia, thereby solving the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A high-efficiency power generation boiler based on clean combustion of low-grade pulverized coal mixed with hydrogen and ammonia, comprising: a power generation boiler body, a water tank installed on one side of the power generation boiler body, a water outlet pipe connected to one side of the water tank, and a water inlet pipe connected to the lower side of the water tank;

[0008] A first opening is provided on the upper side of the water tank, a sliding frame is slidably fitted in the water tank, and a filter is detachably mounted in the sliding frame;

[0009] The sliding frame is rotatably matched with a knob, and the sliding frame is slidably matched with insertion rods on all sides. The four insertion rods are engaged with the knob, and slots are provided on all sides of the first opening.

[0010] Optionally, a first inner cavity is opened in the sliding frame, a first gear is rotatably engaged in the first inner cavity, four first tooth plates are slidably engaged in the first inner cavity, the first gear is engaged with the four first tooth plates, the knob is fixedly connected to the first gear, and the four first tooth plates are respectively fixedly connected to the four insertion rods.

[0011] Optionally, the sliding frame is provided with a first inclined surface on the inner side wall thereof, and the filter screen is provided with a second inclined surface on the outer side wall thereof, and the first inclined surface matches the second inclined surface.

[0012] Optionally, a plurality of extrusion fixing members are installed on opposite sides of the sliding frame, and a plurality of insertion holes are opened on opposite sides of the filter screen.

[0013] Optionally, the jack is a tapered hole, the extrusion fixing piece includes a slide groove, the slide groove is provided on the sliding frame, a slider slides and elastically fits in the slide groove, a tapered plug is installed on one side of the slider, and a roller is installed on the other side of the slider.

[0014] Optionally, one side of the sliding frame is slidably engaged with a fixed plate, and the bottom of the sliding frame is rotatably engaged with a connecting rod and a connecting block, the fixed plate is engaged with the connecting rod and the connecting block, and protrusions are installed on both sides of the end of the connecting rod. The connecting block is cylindrical, and a connecting groove is provided on one side of the connecting block, avoidance grooves are provided on both sides of the connecting groove, and a card slot is provided in the connecting groove.

[0015] Optionally, a second inner cavity is opened in the sliding frame, two second gears are rotatably engaged in the second inner cavity, a second tooth plate is slidably engaged in the second inner cavity, the connecting rod is fixedly connected to one of the second gears, the connecting block is fixedly connected to the other second gear, and the fixed plate is fixedly connected to the second tooth plate.

[0016] Optionally, a slideway is provided on one side of the sliding frame, a plurality of sockets are provided at the bottom of the slideway, the fixing plate is slidably fitted in the slideway, and a latch is elastically fitted on one side of the fixing plate.

[0017] Optionally, a rectangular elastic telescopic rod is installed between the first gear and the knob, and a flat gear ring is installed on the upper side of the sliding frame and the lower side of the knob.

[0018] Optionally, cleaning boxes are installed on the upper and lower sides of the water tank, multiple nozzles are installed on one side of the inner wall of the cleaning box, and one side of the cleaning box is connected to a drain pipe.

[0019] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described below at the same time:

[0020] 1. The knob allows the user to control the insertion or removal of the rod into the slot, making it easier for the user to install or remove the sliding frame, and then replace or clean the filter inside the sliding frame, thereby improving the cleaning efficiency of the filter and reducing the situation where the filter cleaning speed is slow, which affects the normal use of the water tank or the power boiler body. The filter can filter the cold return water vapor, thereby reducing the impurity content and reducing the scale generation inside the water tank.

[0021] 2. The knob is configured to drive the first gear to rotate, thereby meshing the first gear with the four first tooth plates, driving the four first tooth plates to move, and then driving the four insertion rods to move. A plurality of support plates are installed in the first cavity, and the support plates are used to support and limit the first tooth plates, thereby preventing the first tooth plates from shifting without affecting their movement.

[0022] 3. By providing an extrusion fixing part, the conical plug and the spring can cooperate to form a mechanism with the same principle as the elastic bead in the prior art, so that the installed filter can be preliminarily fixed. In addition, the provided roller can reduce the friction with the inner wall of the water tank on the one hand. On the other hand, the arc-shaped structure of the roller can squeeze the side wall of the water tank against the roller when the user inserts the sliding frame, so that the roller drives the conical plug to move into the jack through the extrusion slider to fix the filter. The conical hole cooperates with the conical plug to make the first inclined surface fit tightly with the second inclined surface.

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described below are only some embodiments. A person skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the power generation boiler;

[0026] Figure 2 Schematic diagram of the water tank structure;

[0027] Figure 3 It is a schematic diagram of the sliding frame structure;

[0028] Figure 4 Schematic diagram of the connecting rod and connecting block structure;

[0029] Figure 5 Schematic diagram of the structure of the extruded fixing;

[0030] Figure 6 Schematic diagram of the first inner cavity structure;

[0031] Figure 7 Schematic diagram of the knob structure.

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] Power generation boiler body 1, water tank 2, water outlet pipe 3, water inlet pipe 4, first opening 5, sliding frame 6, filter screen 7, first inner cavity 8, first gear 9, first tooth plate 10, knob 11, plug rod 12, first inclined surface 14, second inclined surface 15, extrusion fixing part 16, socket 17, slide groove 18, slider 19, tapered plug 20, roller 21, fixing plate 22, connecting rod 23, connecting block 24, protrusion 25, connecting groove 26, avoidance groove 27, card slot 28, second gear 30, second tooth plate 31, slideway 32, pin 33, rectangular elastic telescopic rod 34, flat gear ring 35, cleaning box 36, nozzle 37, drain pipe 38.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] See also Figure 1-7 As shown, in this embodiment, a high-efficiency power generation boiler based on clean combustion of low-grade pulverized coal mixed with hydrogen and ammonia is provided, comprising: a power generation boiler body 1, a water tank 2 is installed on one side of the power generation boiler body 1, one side of the water tank 2 is connected to a water outlet pipe 3, and the lower side of the water tank 2 is connected to a water inlet pipe;

[0037] A first opening 5 is provided on the upper side of the water tank 2. A sliding frame 6 is slidably fitted in the water tank 2. A filter screen 7 is detachably mounted in the sliding frame 6.

[0038] The sliding frame 6 is rotatably fitted with a knob 11 , and the sliding frame 6 is slidably fitted with insertion rods 12 on all four sides. The four insertion rods 12 are engaged with the knob 11 , and slots are provided on all four sides of the first opening 5 .

[0039] Through the provided knob 11, the user can conveniently control the insertion or disengagement of the insertion rod 12 into the slot 11, thereby facilitating the user to install or disassemble the sliding frame 6, and then replace or clean the filter 7 in the sliding frame 6, thereby improving the cleaning efficiency of the filter 7 and reducing the situation where the filter 7 affects the normal use of the water tank 2 or the power generation boiler body 1 due to the slow cleaning speed. Through the provided filter 7, the cold reflux water vapor can be filtered, thereby reducing the impurity content, and further reducing the scale generation inside the water tank 2.

[0040] like Figure 6As shown, a first inner cavity 8 is provided in the sliding frame 6 of this embodiment. A first gear 9 is rotatably engaged in the first inner cavity 8. Four first toothed plates 10 are slidably engaged in the first inner cavity 8. The first gear 9 is meshed with the four first toothed plates 10. A knob 11 is fixedly connected to the first gear 9. The four first toothed plates 10 are respectively fixedly connected to four insertion rods 12. The knob 11 is provided to drive the first gear 9 to rotate, thereby driving the four first toothed plates 10 to move through the meshing of the first gear 9 and the four first toothed plates 10, and then driving the four insertion rods 12 to move. A plurality of support plates are installed in the first cavity 8. The support plates are used to support and limit the first toothed plates 10, and prevent the first toothed plates 10 from shifting in position without affecting the movement of the first toothed plates 10.

[0041] like Figure 3 and Figure 5 As shown, the relative inner wall of the sliding frame 6 of this embodiment is provided with a first inclined surface 14, and the relative outer wall of the filter screen 7 is provided with a second inclined surface 15, and the first inclined surface 14 cooperates with the second inclined surface 15; the relative sides of the sliding frame 6 of this embodiment are equipped with a plurality of extrusion fixing members 16, and the relative sides of the filter screen 7 are provided with a plurality of insertion holes 17; the insertion holes 17 of this embodiment are tapered holes, and the extrusion fixing member 16 includes a slide groove 18, which is provided on the sliding frame 6, and a slider 19 is slidably and elastically fitted in the slide groove 18, a tapered plug 20 is installed on one side of the slider 19, and a roller 21 is installed on the other side of the slider 19, wherein limiting grooves are provided on the relative sides of the inner wall of the slide groove 18, and limiting blocks are installed on the upper and lower sides of the slider 19, and springs are installed between the relative sides of the limiting blocks and the limiting grooves. By providing the extrusion fixing member 16, the conical plug 20 can cooperate with the spring to form a mechanism with the same elastic bead principle as in the prior art, and then the installed filter screen 7 can be preliminarily fixed. Moreover, by providing the roller 21, on the one hand, the friction with the inner wall of the water tank 2 can be reduced. On the other hand, the arc-shaped structure of the roller 21 can be used to squeeze the side wall of the water tank 2 against the roller 21 when the user inserts the sliding frame 6, so that the roller 21 drives the conical plug 20 to move into the socket 17 through the extrusion slider 19, thereby fixing the filter screen 7. Moreover, the conical hole cooperates with the conical plug 20 to make the first inclined surface 14 and the second inclined surface 15 fit tightly.

[0042] The bottom of the sliding frame 6 is rotatably matched with a fixed plate 22, and the bottom of the sliding frame 6 is rotatably matched with a connecting rod 23 and a connecting block 24. The fixing plate 22 is meshed with the connecting rod 23 and the connecting block 24. Both sides of the end of the connecting rod 23 are equipped with protrusions 25. The connecting block 24 is cylindrical, and a connecting groove 26 is provided on one side of the connecting block 24. Both sides of the connecting groove 26 are provided with avoidance grooves 27, and a card slot 28 is provided in the connecting groove 26; the sliding frame 6 of this embodiment is provided with a second inner cavity, and two second gears 30 are rotatably matched in the second inner cavity. A second tooth plate 31 is slidably matched in the second inner cavity, the connecting rod 23 is fixedly connected to one of the second gears 30, the connecting block 24 is fixedly connected to the other second gear 30, and the fixing plate 22 is fixedly connected to the second tooth plate 31; a slideway 32 is provided on one side of the sliding frame 6 of this embodiment, and a plurality of sockets are provided at the bottom of the slideway 32. The fixing plate 22 slides in the slideway 32, and a latch 33 is elastically matched on one side of the fixing plate 22. By providing the connecting rod 23 and the connecting block 24, the two sliding frames 6 can be connected to each other. Then, when the user needs to clean the filter 7 on one of the sliding frames 6, the other sliding frame 6 can be quickly moved to the filtering station in the water tank 2, thereby achieving the effect of quickly replacing and cleaning the filter 7.

[0043] In this embodiment, a rectangular elastic telescopic rod 34 is installed between the first gear 10 and the knob 11, and a flat toothed ring 35 is installed on the upper side of the sliding frame 6 and the lower side of the knob 11. The flat toothed ring 35 can limit the position of the knob 11 and reduce the possibility of the knob 11 being reversed due to vibration.

[0044] In this embodiment, a cleaning box 36 is mounted on both the upper and lower sides of the water tank 2. Multiple nozzles 37 are mounted on one side of the inner wall of the cleaning box 36. A drain pipe 38 is connected to one side of the cleaning box 36. One side of the nozzles 37 is connected to a water pipe, which is connected to a water pump. The water inlet of the water pump is connected to a water supply source. The cleaning box 36 allows the nozzles 37 to rinse one side of the filter 7, thereby cleaning the filter 7.

[0045] Working principle:

[0046] Fuel composition: Low-rank coal powder (such as lignite, long flame coal) and hydrogen ammonia (H2-NH3) are mixed in proportion, where ammonia (NH3) serves as a fuel carrier and denitrification agent, and hydrogen (H2) enhances combustion activity.

[0047] Premixing process: The fuel enters the furnace through the burner of the boiler body 1. Hydrogen and ammonia are vaporized first due to their high volatility, forming a gas-solid two-phase flow with the coal powder particles. The vaporization of ammonia absorbs heat and reduces the peak combustion temperature (suppressing thermal NO X The high diffusivity of hydrogen promotes the uniform dispersion of pulverized coal particles, achieving micro-scale mixing enhancement;

[0048] Main combustion reaction:

[0049] Hydrogen combustion: 2H2+O2→2H2O (increases reaction rate and shortens combustion time);

[0050] Pulverized coal combustion: C+O2→CO2, volatile matter (CH4, etc.) and hydrogen and ammonia synergistically burn to improve carbon conversion rate;

[0051] Ammonia has a dual role: serving as a fuel (4NH3+3O2→2N2+6H2O) and removing NO generated during combustion through the selective non-catalytic reduction (SNCR) reaction. X (4NH3+4NO+O2→4N2+6H2O).

[0052] Pollutant control: The addition of hydrogen and ammonia makes the combustion temperature field more uniform (temperature difference ≤ 50°C), and cooperates with low-oxygen combustion (excess air coefficient ≤ 1.15) to reduce NO X Initial emissions are reduced by more than 60%, without the need for additional denitrification equipment;

[0053] The water vapor after power generation by the steam turbine is cooled and refluxed into the water tank 2 through the outlet pipe 3, filtered by the filter 7, and then enters the heating pipe of the power generation boiler body 1 through the water inlet pipe. By providing the filter 7, the water vapor after the cold reflux can be filtered, thereby reducing the impurity content and further reducing the probability of scale generation inside the water tank 2;

[0054] When the filter 7 needs to be cleaned, the knob 11 can be pulled manually or mechanically. The knob 11 moves and stretches the rectangular elastic telescopic rod 34 and drives the flat gear ring 35 below away from the flat gear ring 35 on the sliding frame 6, releasing the engagement of the two flat gear rings 35. At this time, the knob 11 is turned. The knob 11 rotates through the rectangular elastic telescopic rod 34 to drive the first gear 9 to rotate. The first gear 9 rotates and engages with the four first tooth plates 10, driving the four first tooth plates 10 to move. The movement of the four first tooth plates 10 drives the insertion rod 12 to retract into the sliding frame 6. The insertion between the insertion rod 12 and the slot is thereby released, and the knob 11 can be pulled again, which drives the sliding frame 6 to slide out of the first opening 5. After the sliding frame 6 slides out of the first opening 5, the roller 21 is not squeezed by the side wall of the water tank 2, and the slider 19 moves due to the elastic force provided by the spring, driving the tapered plug 20 to move out of the socket 17, but not completely out of the socket 17. At this time, the filter 7 can be manually cleaned or removed and replaced with a new one, thereby reducing the impact of cleaning the filter 7 on the normal operation of the water tank 2.

[0055] A second opening 5 may be provided on the lower side of the water tank 2, and the two sliding frames 6 may be connected to each other through a connecting rod 23 and a connecting block 24. The specific steps are as follows:

[0056] The second gear 30 rotates and drives the connecting rod 23 and the connecting block 24 to rotate, thereby causing the protrusion 25 to move in the card slot 28 and be misaligned with the avoidance slot 27, thereby completing the connection between the two sliding frames 6. At this time, if the filter screen 7 needs to be cleaned, you can refer to the above steps and directly pull one of the sliding frames 6. The sliding frame 6 moves and slides out of the water tank 2 from the opening, and the other sliding frame 6 slides into the water tank 2, which can reduce the situation where the filter screen 7 is cleaned slowly, resulting in delays in the normal use of the water tank 2.

[0057] Cleaning boxes 36 can be set on the upper and lower sides of the water tank 2. When the filter screen 7 that needs to be cleaned is moved into the cleaning box 36, the nozzle 37 is started to spray water to clean the filter screen 7. The cleaned waste water is discharged through the drain pipe 38, which can further improve the cleaning efficiency of the filter screen 7.

[0058] Example 2: The difference between Example 2 and Example 1 is that the design of the knob 11, the first gear 9, the first tooth plate 10, the jack 17 and the slot are cancelled and can be replaced with the cylinders in the prior art. There are two cylinders, which can be installed on the upper and lower opposite outer sides of the two cleaning boxes respectively. The output end of the cylinder is connected to the sliding frame 6, which can drive the sliding frame 6 to move.

[0059] The present invention is not limited to the above-described embodiments. Any structural changes made under the guidance of the present invention, which have the same or similar technical solutions as the present invention, should be understood to fall within the scope of protection of the present invention. The technologies, shapes, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia, characterized by: include: A power generation boiler body (1) is provided with a water tank (2) on one side of the power generation boiler body (1), a water outlet pipe (3) is connected to one side of the water tank (2), and a water inlet pipe is connected to the lower side of the water tank (2); A first opening (5) is provided on the upper side of the water tank (2), a sliding frame (6) is slidably fitted in the water tank (2), and a filter (7) is detachably mounted in the sliding frame (6); The sliding frame (6) is rotatably fitted with a knob (11), and the sliding frame (6) is slidably fitted with insertion rods (12) on all four sides. The four insertion rods (12) are engaged with the knob (11), and slots are provided on all four sides of the first opening (5).

2. The high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia according to claim 1 is characterized in that: A first inner cavity (8) is provided in the sliding frame (6), a first gear (9) is rotatably engaged in the first inner cavity (8), four first tooth plates (10) are slidably engaged in the first inner cavity (8), the first gear (9) is meshed with the four first tooth plates (10), a knob (11) is fixedly connected to the first gear (9), and the four first tooth plates (10) are respectively fixedly connected to the four insertion rods (12).

3. The high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia according to claim 1 is characterized in that: The sliding frame (6) is provided with a first inclined surface (14) relative to the inner side wall, and the filter screen (7) is provided with a second inclined surface (15) relative to the outer side wall. The first inclined surface (14) and the second inclined surface (15) are matched.

4. The high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia according to claim 3 is characterized in that: A plurality of extrusion fixing members (16) are installed on opposite sides of the sliding frame (6), and a plurality of insertion holes (17) are opened on opposite sides of the filter screen (7).

5. The high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia according to claim 4 is characterized in that: The jack (17) is a tapered hole. The extrusion fixing member (16) includes a slide groove (18). The slide groove (18) is provided on the sliding frame (6). A slider (19) slides and elastically fits in the slide groove (18). A tapered plug (20) is installed on one side of the slider (19), and a roller (21) is installed on the other side of the slider (19).

6. The high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia according to claim 1 is characterized in that: A fixed plate (22) is slidably matched on one side of the sliding frame (6), and a connecting rod (23) and a connecting block (24) are rotatably matched on the bottom of the sliding frame (6). The fixed plate (22) is engaged with the connecting rod (23) and the connecting block (24). Both ends of the connecting rod (23) are provided with protrusions (25). The connecting block (24) is cylindrical, and a connecting groove (26) is provided on one side of the connecting block (24). Both sides of the connecting groove (26) are provided with avoidance grooves (27), and a card groove (28) is provided in the connecting groove (26).

7. The high-efficiency power generation boiler based on clean combustion of low-grade pulverized coal mixed with hydrogen and ammonia according to claim 6 is characterized in that: A second inner cavity is provided in the sliding frame (6), two second gears (30) are rotatably engaged in the second inner cavity, a second tooth plate (31) is slidably engaged in the second inner cavity, a connecting rod (23) is fixedly connected to one of the second gears (30), a connecting block (24) is fixedly connected to the other second gear (30), and a fixing plate (22) is fixedly connected to the second tooth plate (31).

8. The high-efficiency power generation boiler based on clean combustion of low-grade pulverized coal mixed with hydrogen and ammonia according to claim 7 is characterized in that: A slideway (32) is provided on one side of the sliding frame (6), a plurality of sockets are provided at the bottom of the slideway (32), the fixing plate (22) is slidably fitted in the slideway (32), and a latch (33) is elastically fitted on one side of the fixing plate (22).

9. The high-efficiency power generation boiler based on clean combustion of low-grade coal mixed with hydrogen and ammonia according to claim 1 is characterized in that: A rectangular elastic telescopic rod (34) is installed between the first gear (10) and the knob (11), and a plane gear ring (35) is installed on the upper side of the sliding frame (6) and the lower side of the knob (11).

10. The high-efficiency power generation boiler based on clean combustion of low-grade pulverized coal mixed with hydrogen and ammonia according to claim 1, characterized in that: A cleaning box (36) is installed on both the upper and lower sides of the water tank (2), a plurality of nozzles (37) are installed on one side of the inner wall of the cleaning box (36), and a drainage pipe (38) is connected to one side of the cleaning box (36).

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