A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue

Abstract

The present invention discloses a control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue, and relates to the technical field of boiler flue gas utilization. In the present invention, a first spiral component that can reciprocate up and down is rotatably installed inside the first smoke gathering component, a return mechanism and a return control shaft are threadedly connected, a first piston plate is slidably arranged inside the smoke storage box, and the smoke storage box and the first smoke gathering component are connected. The boiler flue gas is compressed into the first smoke gathering component through the first piston plate, and an inclined discharge seat is slidably arranged inside the hollow return ring, and a linkage sleeve that cooperates with the thread of the hollow return ring is rotatably arranged on the top of the inclined discharge seat, and the linkage sleeve and the linkage discharge shaft are coaxially arranged. The present invention gathers and concentrates the flue gas into the smoke gathering modification cylinder while conveying the mixed material, which can not only improve the effect of modification and quality improvement, but also impact the mixed material conveyed by the spiral, and effectively avoid the decrease of the modification and quality improvement effect due to the accumulation of the mixed material.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler flue gas utilization, and in particular relates to a control system for preheating and modifying biomass and coal gangue with boiler flue gas at low temperature. Background Art

[0002] Gangue is the main by-product of coal mining and washing and processing, with a yield of about 15-20% of the corresponding coal output. Gangue has become the largest industrial solid waste in my country. Due to the characteristics of low volatile matter content, high ash content, poor combustion stability, difficult ignition, and poor burnout, gangue has been dumped and accumulated in large quantities as solid waste for a long time, seriously affecting the production energy efficiency of coal mines.

[0003] As a renewable energy source, biomass is second only to coal, oil and natural gas in terms of energy supply, and is considered to be a highly promising alternative to traditional fossil fuels. Compared with fossil fuels, biomass has the characteristics of wide availability, low price and carbon neutrality. However, biomass raw materials usually have problems such as high water content, poor grindability, low energy density and easy decay, and are usually difficult to use directly. Therefore, low-temperature thermal upgrading is a necessary step to achieve clean and efficient utilization of biomass and coal gangue.

[0004] Boiler flue gas usually contains a large amount of low-temperature waste heat and a variety of oxidizing components (O2, CO2, H2O), and has the potential to be used for the modification and pretreatment of high-water-content fuels. At the same time, light aromatics are "useless" products generated in large quantities during the thermal upgrading of biomass. Using biomass thermal upgrading tail gas to pretreat coal gangue is expected to achieve the effective load of hydrophobic aromatics in coal gangue, and simultaneously optimize the proportion of combustible components and reaction activity of modified coal gangue. Therefore, the use of boiler flue gas to modify biomass and coal gangue is expected to achieve the recovery and utilization of flue gas waste heat and reduce the energy consumption of upgrading biomass and coal gangue. To this end, we provide a control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue, which solves the problems in the above-mentioned background technology through the specific structural design of the modification control mechanism, the first modification mechanism, the return mechanism, the flue gas concentration mechanism and the second modification mechanism.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions: the present invention is a control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue, including a modification control mechanism, the modification control mechanism includes a cylindrical sealed cover, a return control shaft and a linkage unloading shaft are rotatably installed inside the cylindrical sealed cover respectively; a first modification mechanism, the first modification mechanism is fixedly installed inside the cylindrical sealed cover and the two are coaxially arranged, the first modification mechanism includes a first smoke gathering component, a first spiral component that can reciprocate up and down is rotatably installed inside the first smoke gathering component; a return mechanism, the return mechanism is slidably arranged inside the cylindrical sealed cover and the two are coaxially arranged, the return mechanism is threadedly connected to the return control shaft, and the up and down reciprocating movement of the return mechanism is achieved by controlling the rotation of the return control shaft; and a smoke concentration mechanism, the smoke concentration mechanism is fixedly installed on the modification control mechanism, and the smoke concentration mechanism The mechanism includes a smoke storage box arranged on the outside of the cylindrical closed cover, a first piston plate is slidably arranged inside the smoke storage box, the smoke storage box is connected to the first smoke gathering component, and the boiler smoke in the smoke storage box is compressed into the first smoke gathering component through the first piston plate; the first spiral component includes a first sealing plug and a second sealing plug coaxially arranged therebelow, the first sealing plug is used to achieve sealing of the top of the first smoke gathering component, and the second sealing plug is used to achieve sealing of the bottom of the first smoke gathering component; the return mechanism includes a hollow return ring coaxial with the cylindrical closed cover, an inclined unloading seat is slidably arranged inside the hollow return ring, a linkage sleeve that is rotatably arranged on the top of the inclined unloading seat and is threadably matched with the hollow return ring, the linkage sleeve and the linkage unloading shaft are coaxially arranged, and when the linkage sleeve moves up to achieve plug-in matching with the linkage unloading shaft, the synchronous rotation of the linkage sleeve is achieved by controlling the rotation of the linkage unloading shaft.

[0007] The present invention is further configured as follows: the modified control mechanism also includes a first supporting frame, a second supporting frame is fixedly arranged on one side of the first supporting frame, the cylindrical sealed cover is fixedly installed on the inner side of the second supporting frame, a first motor and a second motor are respectively installed on the top of the cylindrical sealed cover, the output end of the first motor is connected to the return material control shaft, the output end of the second motor is connected to the linkage unloading shaft, a smoke exhaust box is fixedly installed on the second supporting frame, the smoke exhaust box and the cylindrical sealed cover are connected by a first smoke exhaust pipe, a first solenoid valve is installed on the first smoke exhaust pipe, and a second smoke exhaust pipe is installed on the side of the smoke exhaust box opposite to the first smoke exhaust pipe.

[0008] The present invention is further configured as follows: a third carrier frame extending to the interior of the cylindrical sealed cover is fixedly arranged inside the first carrier frame, a third motor is fixedly installed inside the first carrier frame, the output end of the third motor is connected to a horizontally arranged reciprocating screw, a coaxial conical material guide platform and an arc-shaped discharge port are respectively provided at the bottom of the cylindrical sealed cover, a bottom sealing member that matches the gap with the arc-shaped discharge port is provided at the bottom of the second carrier frame, and the output end of the first cylinder installed on the second carrier frame is connected to the bottom sealing member.

[0009] The present invention is further configured as follows: the first smoke gathering component includes a smoke gathering modification cylinder fixedly mounted on a corresponding third supporting frame; a smoke gathering chamber coaxial with the smoke gathering modification cylinder is provided in the wall of the smoke gathering modification cylinder; a smoke escape hole connected to the smoke gathering chamber is provided in the inner wall of the smoke gathering modification cylinder; a first flow hole connected to the smoke gathering chamber is provided in the outer wall of the smoke gathering modification cylinder; a spherical material guide cover is fixedly arranged on the top of the smoke gathering modification cylinder; the spherical material guide cover is connected to the smoke gathering modification cylinder through a material feed port; and a first discharge pipe connected to the smoke gathering modification cylinder is fixedly arranged at the bottom of the smoke gathering modification cylinder of the first smoke gathering component.

[0010] The present invention is further configured such that the first spiral component also includes a first fixed shaft passing through the smoke gathering and modification cylinder, a spiral auger piece located on the inner side of the smoke gathering and modification cylinder is installed on the circumferential side of the first fixed shaft, the first sealing plug and the second sealing plug are both fixed on the first fixed shaft, a third sealing plug is fixedly arranged on the bottom of the first fixed shaft, a rotating base is rotatably arranged on a U-shaped mounting frame installed on the top of the cylindrical sealing cover, and a second cylinder connected to the first fixed shaft is installed on the rotating base.

[0011] The present invention is further configured as follows: a first smoke guide pipe is provided on one side of the smoke storage box, a hollow smoke guide ring connected to the first smoke guide pipe is fixedly installed on the end of the first smoke guide pipe, the hollow smoke guide ring is airtightly sleeved on the corresponding smoke gathering and modification cylinder, a second flow hole connected to the inner cavity of the hollow smoke guide ring is provided on the inner wall, the second flow hole is arranged in one-to-one correspondence with the first flow hole and the two are connected, a second solenoid valve is installed on the first smoke guide pipe, and a smoke input pipe is provided on the other side of the smoke storage box, and a third solenoid valve is installed on the smoke input pipe.

[0012] The present invention is further configured as follows: the present invention also includes a second modification mechanism, the second modification mechanism includes a second smoke gathering component, and a second spiral component is rotatably installed inside the second smoke gathering component; wherein the second smoke gathering component includes a smoke gathering modification cylinder fixedly installed on a corresponding third carrier frame, a smoke gathering chamber coaxial with the smoke gathering modification cylinder wall is provided, a smoke gathering hole connected to the smoke gathering chamber is provided on the inner wall of the smoke gathering modification cylinder, a first through-flow hole connected to the smoke gathering chamber is provided on the outer wall of the smoke gathering modification cylinder, and A spherical material guide cover is fixedly arranged on the top of the smoke gathering and modification cylinder, and the spherical material guide cover is connected to the smoke gathering and modification cylinder through a material feed port; an axial sealed cover is fixedly arranged on the bottom of the smoke gathering and modification cylinder of the second smoke gathering assembly, and the bottom of the axial sealed cover is fitted on the bottom of the cylindrical sealed cover, and a second discharge pipe connected to the corresponding inner cavity of the smoke gathering and modification cylinder is fixed inside the axial sealed cover, and a conical material guide ring coaxial with the second discharge pipe is fixed at the bottom, and a baffle plate connected to the second discharge pipe is installed on the surface of the conical material guide ring.

[0013] The present invention is further configured such that the second spiral assembly includes a second fixed shaft passing through the corresponding smoke gathering and modification cylinder, a spiral auger piece located on the inner side of the corresponding smoke gathering and modification cylinder is installed on the circumferential side of the second fixed shaft, a limiting piece adapted to the third sealing plug is fixed on the top of the second fixed shaft, and the output end of the fourth motor installed at the bottom of the cylindrical sealing cover is connected to the second fixed shaft.

[0014] The present invention is further configured such that the hollow return material ring and the inclined unloading seat are both configured as arc-shaped structures, an arc-shaped material receiving port connected with its inner cavity is opened on the inner wall of the hollow return material ring, an internal threaded portion and a guide portion are fixedly installed at both ends of the hollow return material ring, the internal threaded portion is sleeved on the return material control shaft and the two are threadedly matched, the guide portion is slidably sleeved on the guide shaft inside the cylindrical closed cover, and the inner diameter of the hollow return material ring is the same as the outer diameter of the spherical material guide cover.

[0015] The present invention is further configured as follows: the smoke concentration mechanism also includes a smoke transfer box arranged below the smoke storage box, the smoke storage box and the smoke transfer box are respectively fixedly mounted on the corresponding third carrier frame, a second piston plate is slidably arranged inside the smoke transfer box, a piston rod is fixedly arranged on the first piston plate and the second piston plate, and a movable plate that cooperates with the reciprocating screw transmission is fixed between the piston rods; a second smoke guide pipe is connected to one side of the smoke transfer box, a hollow smoke guide ring connected to it is fixedly installed on the end of the second smoke guide pipe, the hollow smoke guide ring is airtightly sleeved on the corresponding smoke gathering and modification cylinder, a second flow hole connected to its inner cavity is opened on the inner wall of the hollow smoke guide ring, the second flow hole is arranged one-to-one with the first flow hole and the two are connected, a second solenoid valve is installed on the second smoke guide pipe, a third smoke guide pipe is connected between the first smoke guide pipe and the second smoke guide pipe, and a fourth solenoid valve is installed on the third smoke guide pipe.

[0016] The present invention has the following beneficial effects: 1. The present invention allows a certain amount of smoke to be introduced into the smoke storage box through the smoke inlet pipe, and after closing the third solenoid valve, controls the first spiral component to gradually rotate, so that the mixed material in the smoke gathering and modification cylinder is gradually transported downward by the rotating spiral auger piece, and at the same time, under the action of the reciprocating screw rod, the first piston plate is moved to push the smoke in the smoke storage box, and the second solenoid valve is opened at the same time as the first piston plate moves, so that the smoke in the smoke storage box enters the corresponding hollow smoke guide ring cavity along the first smoke guide pipe, and then passes through the second flow hole and the first flow hole in turn to be collected into the smoke gathering chamber, and then dispersed into the interior of the smoke gathering and modification cylinder through various smoke escape holes until the first piston plate abuts against the inner wall of the smoke storage box near the first smoke guide pipe, thereby achieving the goal of gathering and concentrating the smoke into the smoke gathering and modification cylinder while rotating and transporting the mixed material, which can not only improve the effect of modification and quality improvement, but also impact the mixed material transported by the spiral, and effectively avoid the decrease in the modification and quality improvement effect due to the accumulation of the mixed material.

[0017] 2. When the return material control shaft is controlled to rotate, the return material control shaft cooperates with the thread of the internal threaded part, so that the entire return material mechanism moves upward until the arc-shaped material receiving port is aligned with the spherical material guide cover on the first modifying mechanism. At this time, the linkage sleeve is plugged into the linkage unloading shaft, and then the linkage unloading shaft is controlled to rotate by the second motor. The linkage sleeve that rotates synchronously with the linkage unloading shaft drives the inclined unloading seat to move upward until the bottom of the inclined unloading seat is flush with the bottom of the arc-shaped material receiving port. At this time, the mixed material in the hollow return material ring slides along the inclined unloading seat into the corresponding spherical material guide cover, thereby transferring and conveying the mixed material dropped by the second modifying mechanism back to the first modifying mechanism. The modified and quality-improving effect of the mixed material can be improved by the coordinated use of the first modifying mechanism and the second modifying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 The schematic diagram of the structure of a control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue.

[0020] Figure 2 for Figure 1 The structural front view.

[0021] Figure 3 for Figure 1 Schematic diagram of the structure from an upward perspective.

[0022] Figure 4 for Figure 2 Longitudinal structural cross-sectional view.

[0023] Figure 5 for Figure 4 A magnified view of the local structure at point A.

[0024] Figure 6 It is a longitudinal structural cross-sectional view of the modification control mechanism in the present invention.

[0025] Figure 7 for Figure 6 The structural front view.

[0026] Figure 8 It is a cross-sectional view of the transverse structure of the modification control mechanism in the present invention.

[0027] Fig. 9 It is a schematic diagram of the internal structure of the first modification mechanism in the present invention.

[0028] Fig.10 It is a longitudinal structural cross-sectional view of the first smoke gathering component in the present invention.

[0029] Fig.11 It is a schematic structural diagram of the first spiral component in the present invention.

[0030] Fig.12 Schematic diagram of the internal structure of the second modification mechanism in the present invention.

[0031] Fig.13 It is a longitudinal structural cross-sectional view of the second smoke collecting assembly in the present invention.

[0032] Fig.14 It is a schematic diagram of the structure of the second spiral component in the present invention.

[0033] Fig.15 It is a structural cross-sectional view of the smoke concentration mechanism in the present invention.

[0034] Fig.16 It is a structural schematic diagram of the material return mechanism in the present invention.

[0035] Fig.17 for Fig.16 Longitudinal structural section view.

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 1-modification control mechanism, 101-cylindrical closed cover, 102-return material control shaft, 103-linked unloading shaft, 104-first bearing frame, 105-second bearing frame, 106-first motor, 107-second motor, 108-smoke exhaust box, 109-first smoke exhaust pipe, 110-first solenoid valve, 111-second smoke exhaust pipe, 112-third bearing frame, 113-third motor, 114-reciprocating screw, 115-conical guide table, 116-arc discharge port, 1 17-bottom sealing member, 118-first cylinder, 119-guide shaft, 2-first modification mechanism, 3-first smoke gathering component, 301-smoke gathering modification cylinder, 302-smoke gathering chamber, 303-first flow hole, 304-spherical guide cover, 305-feeding port, 306-first discharge pipe, 4-first spiral component, 401-first sealing plug, 402-second sealing plug, 403-first fixed shaft, 404-spiral auger piece, 405-third sealing plug, 406-U-shaped installation Mounting rack, 407-rotating base, 408-second cylinder, 5-return mechanism, 501-hollow return ring, 502-inclined unloading seat, 503-linked sleeve, 504-arc-shaped receiving port, 505-internal threaded portion, 506-guide portion, 6-smoke concentration mechanism, 601-smoke storage box, 602-first piston plate, 603-first smoke guide pipe, 604-hollow smoke guide ring, 605-second flow hole, 606-second solenoid valve, 607-smoke input pipe, 608 -the third solenoid valve, 609-smoke transfer box, 610-the second piston plate, 611-piston rod, 612-movable plate, 613-the second smoke guide pipe, 614-the third smoke guide pipe, 615-the fourth solenoid valve, 7-the second modification mechanism, 8-the second smoke gathering assembly, 801-the axial sealing cover, 802-the second discharge pipe, 803-the conical guide ring, 804-the baffle plate, 9-the second spiral assembly, 901-the second fixed shaft, 902-the limiter, 903-the fourth motor. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-17 The present invention is a control system for low-temperature preheating modification of biomass and coal gangue by boiler flue gas, comprising a modification control mechanism 1, a first modification mechanism 2, a material return mechanism 5 and a flue gas concentration mechanism 6; the modification control mechanism 1 comprises a cylindrical closed cover 101 (which plays a role in heat preservation), and a material return control shaft 102 and a linkage unloading shaft 103 are rotatably installed inside the cylindrical closed cover 101; the first modification mechanism 2 is fixedly installed inside the cylindrical closed cover 101 and the two are coaxially arranged, the first modification mechanism 2 comprises a first smoke gathering component 3, and a first spiral component 4 that can reciprocate up and down is rotatably installed inside the first smoke gathering component 3. When the flue gas is concentrated and gathered inside the first smoke gathering component 3, the first spiral component 4 is gradually rotated to achieve dynamic and full contact between the flue gas and the particulate material, thereby improving the modification and quality improvement effect and efficiency of the biomass and coal gangue mixed material.

[0040] The material return mechanism 5 is slidably arranged inside the cylindrical closed cover 101 and the two are coaxially arranged. The material return mechanism 5 is threadedly connected to the material return control shaft 102. The up and down reciprocating motion of the material return mechanism 5 is achieved by controlling the rotation of the material return control shaft 102, thereby achieving the initial modified and improved mixed material to be transferred to the first modification mechanism 2 again; the flue gas concentration mechanism 6 is fixedly installed on the modification control mechanism 1, and the flue gas concentration mechanism 6 includes a smoke storage box 601 arranged on the outside of the cylindrical closed cover 101, and a first piston plate 602 is slidably arranged inside the smoke storage box 601. The smoke storage box 601 is connected to the first smoke gathering component 3, and the boiler smoke in the smoke storage box 601 is compressed into the first smoke gathering component 3 through the first piston plate 602.

[0041] The first spiral component 4 includes a first sealing plug 401 and a second sealing plug 402 coaxially arranged thereunder. The first sealing plug 401 is used to seal the top of the first smoke collecting component 3, and the second sealing plug 402 is used to seal the bottom of the first smoke collecting component 3. When the first sealing plug 401 seals the top of the first smoke collecting component 3, the second sealing plug 402 seals the bottom of the first smoke collecting component 3, thereby ensuring that the concentrated smoke gathers and stays inside the first smoke collecting component 3; the return mechanism 5 includes a hollow return ring 50 coaxial with the cylindrical closed cover 101. 1. A sloping discharge seat 502 is slidably arranged inside the hollow return ring 501, and a linkage sleeve 503 which is threadably matched with the hollow return ring 501 is rotatably arranged on the top of the sloping discharge seat 502. The linkage sleeve 503 and the linkage discharge shaft 103 are coaxially arranged. When the linkage sleeve 503 moves upward to be plugged into the linkage discharge shaft 103, the synchronous rotation of the linkage sleeve 503 is achieved by controlling the rotation of the linkage discharge shaft 103, thereby the mixed material in the hollow return ring 501 can be pushed out and dropped into the first smoke gathering component 3 through the upwardly moved sloping discharge seat 502.

[0042] In this embodiment of the present invention, the modification control mechanism 1 also includes a first carrier 104, a second carrier 105 is fixedly arranged on one side of the first carrier 104, the cylindrical closed cover 101 is fixedly installed on the inner side of the second carrier 105, and the first motor 106 and the second motor 107 are respectively installed on the top of the cylindrical closed cover 101. The output end of the first motor 106 is connected to the return material control shaft 102, and the output end of the second motor 107 is connected to the linkage unloading shaft 103. A smoke exhaust box 108 is fixedly installed on the second carrier 105, and the smoke exhaust box 108 is connected to the cylindrical closed cover 101 through a first smoke exhaust pipe 109. According to the configuration, a first solenoid valve 110 is installed on the first smoke exhaust pipe 109, and a second smoke exhaust pipe 111 is installed on the side of the smoke exhaust box 108 opposite to the first smoke exhaust pipe 109. When it is monitored that the internal air pressure of the cylindrical sealed cover 101 is close to the set threshold, the controller controls the opening of the first solenoid valve 110, so that the smoke in the cylindrical sealed cover 101 enters the smoke exhaust box 108 along the first smoke exhaust pipe 109, and is then discharged into the smoke treatment equipment through the second smoke exhaust pipe 111 for purification. When it is monitored that the internal air pressure of the cylindrical sealed cover 101 returns to the normal value range, the controller controls the closing of the first solenoid valve 110.

[0043] In this embodiment of the present invention, a third carrier frame 112 extending to the inside of the cylindrical closed cover 101 is fixedly arranged inside the first carrier frame 104, a third motor 113 is fixedly installed inside the first carrier frame 104, and a horizontally arranged reciprocating screw 114 is connected to the output end of the third motor 113. A conical guide platform 115 and an arc-shaped discharge port 116 with a coaxial center are respectively provided at the bottom of the cylindrical closed cover 101, and a bottom seal that matches the arc-shaped discharge port 116 is provided at the bottom of the second carrier frame 105. Part 117, the output end of the first cylinder 118 installed on the second carrier 105 is connected to the bottom sealing part 117. In the initial state, under the action of the first cylinder 118, the bottom sealing part 117 is gap-fitted inside the arc-shaped discharge port 116 to achieve sealing, thereby achieving the bottom sealing of the cylindrical closed cover 101. After the arc-shaped discharge port 116 is opened, the mixed material that has been modified and upgraded can be guided to the arc-shaped discharge port 116 for discharge and collection through the action of the conical guide platform 115.

[0044] In this embodiment of the present invention, the first smoke gathering component 3 includes a smoke gathering modification cylinder 301 fixedly mounted on the corresponding third carrier frame 112, a smoke gathering chamber 302 coaxial with the smoke gathering modification cylinder 301 is provided in the wall of the smoke gathering modification cylinder 301, a smoke escape hole connected to the smoke gathering chamber 302 is provided in the inner wall of the smoke gathering modification cylinder 301, a first flow hole 303 connected to the smoke gathering chamber 302 is provided in the outer wall of the smoke gathering modification cylinder 301, a spherical material guide cover 304 is fixedly arranged on the top of the smoke gathering modification cylinder 301, and the spherical material guide cover 304 is connected to the smoke gathering modification cylinder 301 through a feed port 305. The smoke gathering modification cylinder 301 of the first smoke gathering component 3 The first spiral assembly 4 further comprises a first fixed shaft 403 penetrating the smoke-collecting and modifying cylinder 301, a spiral auger piece 404 located inside the smoke-collecting and modifying cylinder 301 is installed on the circumferential side of the first fixed shaft 403, a first sealing plug 401 and a second sealing plug 402 are both fixed on the first fixed shaft 403, a third sealing plug 405 is fixedly arranged at the bottom of the first fixed shaft 403, a rotating base 407 is rotatably arranged on a U-shaped mounting frame 406 installed on the top of the cylindrical closed cover 101, and a second cylinder 408 connected to the first fixed shaft 403 is installed on the rotating base 407.

[0045] A first smoke guide pipe 603 is connected to one side of the smoke storage box 601, and a hollow smoke guide ring 604 connected to the first smoke guide pipe 603 is fixedly installed at the end of the first smoke guide pipe 603. The hollow smoke guide ring 604 is tightly sleeved on the corresponding smoke-collecting and modifying cylinder 301. The inner wall of the hollow smoke guide ring 604 is provided with a second flow hole 605 connected to its inner cavity. The second flow hole 605 is arranged in a one-to-one correspondence with the first flow hole 303 and the two are connected. A second solenoid valve 606 is installed on the first smoke guide pipe 603, and a smoke input pipe 607 is connected to the other side of the smoke storage box 601. A third solenoid valve 608 is installed on the smoke input pipe 607; when the feed door on the cylindrical closed cover 101 is opened, a certain amount of mixed material is poured into the first smoke-collecting and modifying cylinder 301. After entering the spherical material guide cover 304 on the smoke assembly 3, the feed door is closed and the first fixed shaft 403 is controlled to move upward by the second cylinder 408, so that the first sealing plug 401 is separated from the feed port 305 on the first smoke gathering assembly 3, and the second sealing plug 402 is separated from the first discharge pipe 306 on the first smoke gathering assembly 3. At this time, the mixed material in the spherical material guide cover 304 enters the spiral auger piece 404 in the smoke gathering modification cylinder 301 along the feed port 305, and then the first fixed shaft 403 is controlled by the second cylinder 408 to move downward back to the initial position (at this time, the first sealing plug 401 blocks the corresponding feed port 305 again, and the second sealing plug 402 blocks the first discharge pipe 306 again).

[0046] Then, the third solenoid valve 608 is opened, and a certain amount of smoke is introduced into the smoke storage box 601 through the smoke inlet pipe 607. After closing the third solenoid valve 608, the first spiral assembly 4 is controlled to rotate gradually, and the mixed material in the smoke-collecting and modifying cylinder 301 is gradually transported downward through the rotating spiral auger piece 404. At the same time, under the action of the reciprocating screw rod 114, the first piston plate 602 is moved to push the smoke in the smoke storage box 601. When the first piston plate 602 moves, the third solenoid valve 608 is opened. The second solenoid valve 606 allows the smoke in the smoke storage box 601 to enter the inner cavity of the corresponding hollow smoke guide ring 604 along the first smoke guide pipe 603, and then pass through the second flow hole 605 and the first flow hole 303 in sequence to be collected into the smoke gathering chamber 302, and then dispersed into the interior of the smoke gathering and modification cylinder 301 through each smoke escape hole until the first piston plate 602 abuts against the inner wall of the smoke storage box 601 near the first smoke guide pipe 603, thereby realizing the collection and concentration of smoke while rotating and conveying the mixed material. The mixed material is then transported to the smoke-collecting and modifying cylinder 301, which not only improves the modification and upgrading effect but also impacts the mixed material being spirally transported, effectively avoiding the modification and upgrading effect being reduced due to the accumulation of the mixed material. At this time, the mixed material that has been spirally transported is accumulated at the bottom of the smoke-collecting and modifying cylinder 301 on the first smoke-collecting component 3. After the first discharge pipe 306 is opened to allow the mixed material to fall into the return mechanism 5, the return mechanism 5 is moved upward to the smoke-collecting and modifying cylinder 301 on the first smoke-collecting component 3 through the rotation of the return control shaft 102. At the top of the smoke modification cylinder 301, the mixed material in the return mechanism 5 falls into the spherical material guide cover 304, and then falls into the interior of the smoke modification cylinder 301 through the feed port 305 on the spherical material guide cover 304. After the feed port 305 and the first discharge pipe 306 on the smoke modification cylinder 301 are blocked, the reciprocating screw 114 is controlled to rotate again to make the first piston plate 602 move in the opposite direction and return to the initial position. The modification and quality improvement of the mixed material can be achieved again according to the same control method as above.

[0047] Specific embodiment 2, on the basis of specific embodiment 1, the present invention further comprises a second modification mechanism 7, the second modification mechanism 7 comprises a second smoke gathering component 8, and a second spiral component 9 is rotatably installed inside the second smoke gathering component 8; wherein the second smoke gathering component 8 comprises a smoke gathering modification cylinder 301 fixedly installed on the corresponding third carrier frame 112, a smoke gathering chamber 302 coaxial with the smoke gathering modification cylinder 301 is provided in the wall thereof, a smoke gathering hole communicating with the smoke gathering chamber 302 is provided in the inner wall of the smoke gathering modification cylinder 301, a first through-flow hole 303 communicating with the smoke gathering chamber 302 is provided in the outer wall of the smoke gathering modification cylinder 301, and the smoke gathering modification cylinder 301 comprises a second smoke gathering component 8, wherein the second smoke gathering component 8 ... A spherical material guide cover 304 is fixedly arranged on the top of 301, and the spherical material guide cover 304 is connected to the smoke gathering and modification cylinder 301 through the feed port 305; an axial sealing cover 801 is fixed to the bottom of the smoke gathering and modification cylinder 301 of the second smoke gathering assembly 8, and the bottom of the axial sealing cover 801 is fitted on the bottom of the cylindrical sealing cover 101, and a second discharge pipe 802 connected to the inner cavity of the corresponding smoke gathering and modification cylinder 301 is fixed inside the axial sealing cover 801, and a conical material guide ring 803 coaxial with the second discharge pipe 802 is fixed to the bottom, and a baffle plate 804 connected to the second discharge pipe 802 is installed on the surface of the conical material guide ring 803.

[0048] In this embodiment of the present invention, the second spiral component 9 includes a second fixed shaft 901 that passes through the corresponding smoke gathering and modification cylinder 301, and a spiral auger piece 404 located on the inner side of the corresponding smoke gathering and modification cylinder 301 is installed on the side surface of the second fixed shaft 901. A limiting piece 902 that is compatible with the third sealing plug 405 is fixed on the top of the second fixed shaft 901. The output end of the fourth motor 903 installed at the bottom of the cylindrical closed cover 101 is connected to the second fixed shaft 901, and the second fixed shaft 901 is driven to rotate by the fourth motor 903. Under the action of the second fixed shaft 901, the limiting piece 902 is driven to rotate synchronously, and the third sealing plug 405 is driven to rotate through the limiting piece 902, thereby realizing the synchronous rotation of the first spiral component 4 and the second spiral component 9.

[0049] In this embodiment of the present invention, the hollow return ring 501 and the inclined discharge seat 502 are both configured as arc structures, and an arc-shaped material receiving port 504 communicating with the inner cavity thereof is provided on the inner wall of the hollow return ring 501. In the initial state, the hollow return ring 501 is attached to the bottom of the cylindrical closed cover 101, and at this time, the arc-shaped material receiving port 504 corresponds to the conical guide ring 803 (such as Figure 5As shown in the figure, the mixed material dropped from the second discharge pipe 802 can slide along the conical guide ring 803 to the inside of the hollow return ring 501 through the joint action of the axial sealing cover 801 and the baffle plate 804. At this time, the feed port 305 on the second smoke gathering component 8 is blocked by the third sealing plug 405, and the bottom of the smoke gathering modification cylinder 301 on the second smoke gathering component 8 is blocked by the axial sealing cover 801 and the hollow return ring 501. The two ends of the hollow return ring 501 are respectively fixed with an internal threaded portion 505 and a guide portion 506. The internal threaded portion 505 is sleeved on the return control shaft 102 and the two are threadedly matched. The guide portion 506 is slidably sleeved on the guide shaft 119 inside the cylindrical sealing cover 101. The inner diameter of the hollow return ring 501 is the same as the outer diameter of the spherical guide cover 304. When the shaft 102 rotates, the return material control shaft 102 cooperates with the threads of the internal threaded portion 505, so that the entire return material mechanism 5 moves upward until the arc-shaped material receiving port 504 is aligned with the spherical material guide cover 304 on the first modifying mechanism 2. At this time, the linkage sleeve 503 is plugged into the linkage unloading shaft 103, and then the linkage unloading shaft 103 is controlled to rotate by the second motor 107. The linkage sleeve 503 that rotates synchronously with the linkage unloading shaft 103 drives the inclined unloading seat 502 to move upward until the bottom of the inclined unloading seat 502 is flush with the bottom of the arc-shaped material receiving port 504. At this time, the mixed material in the hollow return material ring 501 slides along the inclined unloading seat 502 into the corresponding spherical material guide cover 304, thereby transferring the mixed material dropped from the second modifying mechanism 7 back to the first modifying mechanism 2.

[0050] In this embodiment of the present invention, the smoke concentration mechanism 6 also includes a smoke transfer box 609 arranged below the smoke storage box 601, and the smoke storage box 601 and the smoke transfer box 609 are respectively fixedly installed on the corresponding third carrier frame 112, and a second piston plate 610 is slidably arranged inside the smoke transfer box 609, and piston rods 611 are fixedly arranged on the first piston plate 602 and the second piston plate 610, and a movable plate 612 that cooperates with the reciprocating screw 114 for transmission is fixed between the piston rods 611; a second smoke guide pipe 613 is connected to one side of the smoke transfer box 609, and the second A hollow smoke guide ring 604 connected to the smoke guide pipe 613 is fixedly installed at the end thereof. The hollow smoke guide ring 604 is airtightly sleeved on the corresponding smoke gathering and modification cylinder 301. A second flow hole 605 connected to the inner cavity thereof is provided on the inner wall of the hollow smoke guide ring 604. The second flow hole 605 is arranged in one-to-one correspondence with the first flow hole 303 and the two are connected. A second solenoid valve 606 is installed on the second smoke guide pipe 613. A third smoke guide pipe 614 is arranged between the first smoke guide pipe 603 and the second smoke guide pipe 613, and a fourth solenoid valve 615 is installed on the third smoke guide pipe 614.

[0051] When the spirally conveyed mixed material is accumulated at the bottom of the smoke gathering modification cylinder 301 on the first smoke gathering component 3, the controller controls the opening of the fourth solenoid valve 615, so that the concentrated smoke in the inner cavity of the smoke gathering modification cylinder 301 on the first smoke gathering component 3 passes through the first flow hole 303 and the second flow hole 605 in turn into the first smoke guide pipe 603, and then enters the interior of the smoke transfer box 609 through the third smoke guide pipe 614 and the second smoke guide pipe 613. When the fourth solenoid valve 615 is opened, the reciprocating screw 114 continues to rotate to make the first piston plate 602 move in the opposite direction until it returns to the initial position. At this time, the controller controls the fourth solenoid valve 615 to close and the second solenoid valve 606 to open.

[0052] Next, the first fixed shaft 403 is controlled to move upward by the second cylinder 408, so that the first sealing plug 401 is separated from the feed port 305 on the first smoke gathering component 3, the second sealing plug 402 is separated from the first discharge pipe 306 on the first smoke gathering component 3, and the third sealing plug 405 is separated from the feed port 305 on the second smoke gathering component 8. At this time, the mixed material in the smoke gathering modification cylinder 301 on the first smoke gathering component 3 falls into the spherical material guide cover 304 on the second smoke gathering component 8 along the first discharge pipe 306. The mixed material that falls into the spherical material guide cover 304 enters along the feed port 305 onto the spiral auger piece 404 in the smoke gathering modification cylinder 301 on the second smoke gathering component 8, and then the first fixed shaft 403 is controlled by the second cylinder 408 to move downward back to the initial position (at this time, the first sealing plug 401 blocks the corresponding feed port 305 again, the second sealing plug 402 blocks the first discharge pipe 306 again, and the feed port 305 on the second smoke gathering component 8 is blocked by the third sealing plug 405).

[0053] Subsequently, the second fixed shaft 901 is driven to rotate by the fourth motor 903, and the limit member 902 is driven to rotate synchronously under the action of the second fixed shaft 901, and the third sealing plug 405 is driven to rotate through the limit member 902, thereby realizing the synchronous rotation of the first spiral component 4 and the second spiral component 9. When the spiral auger piece 404 on the second spiral component 9 rotates to realize the gradual downward conveying of the mixed material, the controller opens the second solenoid valve 606 on the second smoke guide pipe 613 and starts the third motor 113. Under the action of the reciprocating screw rod 114, the movable plate 612 is driven to move towards the smoke transfer box 609, and the piston rod 611 that moves synchronously with the movable plate 612 drives the second piston plate 610 to move. The plate 610 compresses the smoke in the smoke transfer box 609, and the compressed smoke enters the smoke gathering and modification cylinder 301 on the second smoke gathering component 8 through the second smoke guide pipe 613, until the second piston plate 610 abuts against the inner wall of the smoke transfer box 609 close to the second smoke guide pipe 613, thereby achieving the goal of gathering and concentrating the smoke into the smoke gathering and modification cylinder 301 on the second smoke gathering component 8 while rotating and conveying the mixed material, which can not only improve the modification and quality improvement effect but also impact the spirally conveyed mixed material, effectively avoiding the modification and quality improvement effect due to the accumulation of the mixed material. The mixed material falling from the second discharge pipe 802 enters the hollow return ring 501 along the conical guide ring 803 and the arc-shaped receiving port 504.

[0054] Next, the first motor 106 controls the return material control shaft 102 to rotate, and under the thread cooperation between the return material control shaft 102 and the internal threaded portion 505, the entire return material mechanism 5 moves upward until the arc-shaped material receiving port 504 is aligned with the spherical material guide cover 304 on the first modifying mechanism 2. At this time, the linkage sleeve 503 is plugged into the linkage discharge shaft 103, and then the linkage discharge shaft 103 is controlled to rotate by the second motor 107. The linkage sleeve 503 that rotates synchronously with the linkage discharge shaft 103 drives the inclined surface discharge seat 502 to move upward until the bottom of the inclined surface discharge seat 502 is flush with the bottom of the arc-shaped material receiving port 504. At this time, the mixed material in the hollow return material ring 501 slides along the inclined surface discharge seat 502 into the corresponding spherical material guide cover 304, thereby dropping the second modifying mechanism 7. The mixed material is transferred and transported back to the first modification mechanism 2, and then the second motor 107 controls the linked unloading shaft 103 to rotate in the opposite direction until the inclined unloading seat 502 moves downward and rests against the bottom of the hollow return ring 501 again. At this time, the concentrated flue gas in the smoke gathering and modification cylinder 301 on the second smoke gathering assembly 8 is directly discharged into the inner cavity of the cylindrical closed cover 101 through the second discharge pipe 802 to form an insulation layer. Then, the return control shaft 102 is controlled to rotate in the opposite direction to make the entire return mechanism 5 move downward and return to the initial position. Then, the reciprocating screw rod 114 continues to rotate to make the first piston plate 602 and the second piston plate 610 return to the initial position. Then the controller closes each second solenoid valve 606, and continues to use the same control method as above to continuously realize the modification and quality improvement of the mixed material.

[0055] After the modification and upgrading of the mixed material is completed, the entire return material mechanism 5 storing the mixed material is moved upward by rotating the return material control shaft 102, and the mixed material therein is transferred to the spherical material guide cover 304 on the upper smoke gathering modification cylinder 301, and then the first fixed shaft 403 is controlled to move upward by the second cylinder 408, so that the first sealing plug 401 is separated from the corresponding feed port 305, the second sealing plug 402 is separated from the first discharge pipe 306, and the third sealing plug 405 is separated from the feed port 305 on the second smoke gathering component 8, and then the second fixed shaft 901 is driven to rotate by the fourth motor 903, and the limiting member 902 is driven to rotate synchronously under the action of the second fixed shaft 901, and the third sealing plug 405 is driven to rotate by the limiting member 902, thereby realizing the synchronous rotation of the first spiral component 4 and the second spiral component 9, until the modified mixed material is The mixed material is transported to the bottom of the cylindrical closed cover 101 (i.e., the modified mixed material is supported by the bottom sealing member 117), and finally the bottom sealing member 117 is driven downward by the first cylinder 118 to disengage from the arc-shaped discharge port 116, so that the modified mixed material can fall along the arc-shaped discharge port 116 for collection. After the discharge is completed, the bottom sealing member 117 is driven upward by the first cylinder 118 to re-block the arc-shaped discharge port 116, and then the unloaded return mechanism 5 is moved downward back to the initial position by the rotation of the return control shaft 102, and the first fixed shaft 403 is controlled by the second cylinder 408 to move downward back to the initial position (at this time, the first sealing plug 401 blocks the corresponding feed port 305 again, the second sealing plug 402 blocks the first discharge pipe 306 again, and the feed port 305 on the second smoke gathering component 8 is blocked by the third sealing plug 405).

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue, characterized in that: include: A modification control mechanism (1), the modification control mechanism (1) comprising a cylindrical sealed cover (101), wherein a material return control shaft (102) and a linkage discharge shaft (103) are rotatably mounted inside the cylindrical sealed cover (101); A first modifying mechanism (2), the first modifying mechanism (2) being fixedly mounted inside the cylindrical closed cover (101) and the two being arranged coaxially, the first modifying mechanism (2) comprising a first smoke collecting component (3), a first spiral component (4) being rotatably mounted inside the first smoke collecting component (3) and capable of reciprocating up and down; A material return mechanism (5), the material return mechanism (5) being slidably disposed inside the cylindrical closed cover (101) and the two being coaxially disposed, the material return mechanism (5) being threadedly connected to the material return control shaft (102), and the upward and downward reciprocating motion of the material return mechanism (5) being achieved by controlling the rotation of the material return control shaft (102); and a smoke concentration mechanism (6), the smoke concentration mechanism (6) being fixedly mounted on the modification control mechanism (1), the smoke concentration mechanism (6) comprising a smoke storage box (601) arranged outside the cylindrical closed cover (101), a first piston plate (602) being slidably arranged inside the smoke storage box (601), the smoke storage box (601) being connected to the first smoke gathering component (3), and the boiler smoke in the smoke storage box (601) being compressed by the first piston plate (602) and entering into the first smoke gathering component (3); The first spiral component (4) comprises a first sealing plug (401) and a second sealing plug (402) coaxially arranged thereunder, the first sealing plug (401) being used to seal the top of the first smoke collecting component (3), and the second sealing plug (402) being used to seal the bottom of the first smoke collecting component (3); The material return mechanism (5) comprises a hollow material return ring (501) coaxial with the cylindrical sealing cover (101); a slanted discharge seat (502) is slidably arranged inside the hollow material return ring (501); a linkage sleeve (503) threadedly engaged with the hollow material return ring (501) is rotatably arranged at the top of the slanted discharge seat (502); the linkage sleeve (503) and the linkage discharge shaft (103) are coaxially arranged; when the linkage sleeve (503) moves upward to be plugged into the linkage discharge shaft (103), the linkage sleeve (503) is synchronously rotated by controlling the rotation of the linkage discharge shaft (103).

2. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 1, characterized in that: The modification control mechanism (1) further comprises a first support frame (104), a second support frame (105) being fixedly arranged on one side of the first support frame (104), the cylindrical closed cover (101) being fixedly mounted on the inner side of the second support frame (105), a first motor (106) and a second motor (107) being respectively mounted on the top of the cylindrical closed cover (101), the output end of the first motor (106) being connected to the return material control shaft (102), the output end of the second motor (107) being connected to the linkage unloading shaft (103), a smoke exhaust box (108) being fixedly mounted on the second support frame (105), the smoke exhaust box (108) being connected to the cylindrical closed cover (101) via a first smoke exhaust pipe (109), a first solenoid valve (110) being mounted on the first smoke exhaust pipe (109), and a second smoke exhaust pipe (111) being mounted on the side of the smoke exhaust box (108) opposite to the first smoke exhaust pipe (109).

3. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 2, characterized in that: A third carrier frame (112) extending into the interior of the cylindrical sealed cover (101) is fixedly arranged inside the first carrier frame (104), a third motor (113) is fixedly installed inside the first carrier frame (104), an output end of the third motor (113) is connected to a horizontally arranged reciprocating screw (114), a conical material guide table (115) and an arc-shaped material discharge port (116) coaxially arranged at the bottom of the cylindrical sealed cover (101), a bottom sealing member (117) with a clearance fit with the arc-shaped material discharge port (116) is arranged at the bottom of the second carrier frame (105), and an output end of a first cylinder (118) installed on the second carrier frame (105) is connected to the bottom sealing member (117).

4. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 3, characterized in that: The first smoke gathering component (3) comprises a smoke gathering modification cylinder (301) fixedly mounted on a corresponding third support frame (112); a smoke gathering chamber (302) coaxial with the smoke gathering modification cylinder (301) is provided in the wall of the smoke gathering modification cylinder (301); a smoke escape hole connected to the smoke gathering chamber (302) is provided in the inner wall of the smoke gathering modification cylinder (301); a first flow hole (303) connected to the smoke gathering chamber (302) is provided in the outer wall of the smoke gathering modification cylinder (301); a spherical material guide cover (304) is fixedly arranged on the top of the smoke gathering modification cylinder (301); the spherical material guide cover (304) and the smoke gathering modification cylinder (301) are connected via a material feed port (305); and a first material discharge pipe (306) connected to the smoke gathering modification cylinder (301) of the first smoke gathering component (3) is fixedly arranged on the bottom of the smoke gathering modification cylinder (301).

5. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 4, characterized in that: The first spiral component (4) also includes a first fixed shaft (403) that passes through the smoke-collecting and modifying cylinder (301); a spiral auger piece (404) located on the inner side of the smoke-collecting and modifying cylinder (301) is installed on the circumferential side of the first fixed shaft (403); the first sealing plug (401) and the second sealing plug (402) are both fixed on the first fixed shaft (403); a third sealing plug (405) is fixedly arranged at the bottom of the first fixed shaft (403); a rotating base (407) is rotatably arranged on a U-shaped mounting frame (406) installed on the top of the cylindrical closed cover (101); and a second cylinder (408) connected to the first fixed shaft (403) is installed on the rotating base (407).

6. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 5, characterized in that: A first smoke guide pipe (603) is provided on one side of the smoke storage box (601), and a hollow smoke guide ring (604) connected to the first smoke guide pipe (603) is fixedly installed on the end of the first smoke guide pipe (603). The hollow smoke guide ring (604) is tightly sleeved on the corresponding smoke gathering and modification cylinder (301). A second flow hole (605) connected to the inner cavity of the hollow smoke guide ring (604) is provided on the inner wall. The second flow hole (605) corresponds to the first flow hole (303) and the two are connected. A second solenoid valve (606) is installed on the first smoke guide pipe (603). A smoke input pipe (607) is provided on the other side of the smoke storage box (601), and a third solenoid valve (608) is installed on the smoke input pipe (607).

7. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 6, characterized in that: It also comprises a second modification mechanism (7), wherein the second modification mechanism (7) comprises a second smoke gathering component (8), wherein a second spiral component (9) is rotatably mounted inside the second smoke gathering component (8); The second smoke gathering component (8) comprises a smoke gathering modification cylinder (301) fixedly mounted on a corresponding third support frame (112); a smoke gathering chamber (302) coaxial with the smoke gathering modification cylinder (301) is provided in a wall of the smoke gathering modification cylinder (301); a smoke escape hole communicating with the smoke gathering chamber (302) is provided in an inner wall of the smoke gathering modification cylinder (301); a first flow hole (303) communicating with the smoke gathering chamber (302) is provided in an outer wall of the smoke gathering modification cylinder (301); a spherical material guide cover (304) is fixedly arranged on the top of the smoke gathering modification cylinder (301); the spherical material guide cover (304) and the smoke gathering modification cylinder (301) are connected via a material feed port (305); An axial sealing cover (801) is fixed to the bottom of the smoke gathering and modification cylinder (301) of the second smoke gathering component (8), and the bottom of the axial sealing cover (801) is arranged to fit the bottom of the cylindrical sealing cover (101). A second discharge pipe (802) connected to the inner cavity of the corresponding smoke gathering and modification cylinder (301) is fixed inside the axial sealing cover (801), and a conical guide ring (803) coaxial with the second discharge pipe (802) is fixed to the bottom, and a baffle plate (804) connected to the second discharge pipe (802) is installed on the surface of the conical guide ring (803).

8. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 7, characterized in that: The second spiral component (9) comprises a second fixed shaft (901) penetrating the corresponding smoke-collecting and modifying cylinder (301); a spiral auger piece (404) located inside the corresponding smoke-collecting and modifying cylinder (301) is installed on the circumferential side of the second fixed shaft (901); a limiter (902) matched with the third sealing plug (405) is fixed on the top of the second fixed shaft (901); and an output end of a fourth motor (903) installed at the bottom of the cylindrical closed cover (101) is connected to the second fixed shaft (901).

9. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 8, characterized in that: The hollow material return ring (501) and the inclined surface discharge seat (502) are both configured as arc-shaped structures. An arc-shaped material receiving opening (504) communicating with the inner cavity of the hollow material return ring (501) is provided on the inner wall thereof. An internal threaded portion (505) and a guide portion (506) are respectively fixedly mounted on both ends of the hollow material return ring (501). The internal threaded portion (505) is sleeved on the material return control shaft (102) and the two are threadably matched. The guide portion (506) is slidably sleeved on the guide shaft (119) inside the cylindrical closed cover (101). The inner diameter of the hollow material return ring (501) is the same as the outer diameter of the spherical material guide cover (304).

10. A control system for low-temperature preheating of boiler flue gas to modify biomass and coal gangue according to claim 9, characterized in that: The smoke concentration mechanism (6) further comprises a smoke transfer box (609) arranged below the smoke storage box (601); the smoke storage box (601) and the smoke transfer box (609) are respectively fixedly mounted on corresponding third bearing frames (112); a second piston plate (610) is slidably arranged inside the smoke transfer box (609); piston rods (611) are fixedly arranged on the first piston plate (602) and the second piston plate (610); a movable plate (612) that cooperates with the reciprocating screw rod (114) in transmission is fixed between the piston rods (611); A second smoke guide pipe (613) is connected to one side of the smoke transfer box (609), and a hollow smoke guide ring (604) connected to the second smoke guide pipe (613) is fixedly installed at the end of the second smoke guide pipe (613). The hollow smoke guide ring (604) is tightly sleeved on the corresponding smoke gathering and modification cylinder (301). The inner wall of the hollow smoke guide ring (604) is provided with a second flow hole (605) connected to the inner cavity of the hollow smoke guide ring (604). The second flow hole (605) is arranged in a one-to-one correspondence with the first flow hole (303) and the two are connected. A second solenoid valve (606) is installed on the second smoke guide pipe (613), and a third smoke guide pipe (614) is connected between the first smoke guide pipe (603) and the second smoke guide pipe (613). A fourth solenoid valve (615) is installed on the third smoke guide pipe (614).

Images