A construction waste off-gas recovery system

Abstract

This invention discloses a construction waste exhaust gas recovery system, including a decomposition kiln and a recovery unit. The recovery unit is connected to the decomposition kiln and is used to sequentially decompose the forward-conveyed construction waste and recover the flue gas generated from incineration. The recovery unit includes a primary decomposition component located inside the decomposition kiln, and the decomposition component includes a rotating plate. The rotating plate is used to screen and carry unrefined construction waste for rotation. In this construction waste exhaust gas recovery system, through the primary decomposition component, crushing rollers can collect larger impurities in the construction waste through the feed inlet into the rotating plate. With the crushing rollers rotating at different speeds within the rotating plate, the impurities are squeezed in the space between the crushing rollers and the rotating plate, thereby crushing the larger impurities in the construction waste.

Description

Technical Field

[0001] This invention relates to the field of construction waste technology, specifically to a construction waste exhaust gas recovery system. Background Technology

[0002] Construction waste refers to the slag, waste soil, waste materials, silt and other waste generated by construction units or individuals in the process of constructing, laying or demolishing or repairing various buildings, structures, pipelines, etc. Construction waste refers to the general term for slag, waste concrete, waste bricks and stones and other waste generated by people in the production activities of the construction industry such as demolition, construction, decoration and repair.

[0003] Existing technologies can recycle and regenerate aggregates from building materials. First, the construction waste is crushed into small pieces, and then fed into a decomposition furnace. The lime is obtained through high-temperature calcination, thus realizing the recycling and regeneration of construction waste.

[0004] However, in the existing process, due to excessive accumulation of calcium carbonate during calcination, the resulting calcium oxide contains many unreacted calcium carbonate impurities. Furthermore, this reaction generates a large amount of waste gas. The incomplete reaction during this process prevents the calcium carbonate powder from reacting completely at high temperatures, resulting in the inability to fully recover the generated waste gas and affecting the integrity of the calcination reaction. Therefore, we propose a construction waste waste gas recovery device. Summary of the Invention

[0005] The purpose of this invention is to provide a construction waste exhaust gas recovery system that solves the problems mentioned in the background by using a primary decomposition component and a secondary decomposition component.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a construction waste exhaust gas recovery system, comprising a decomposition kiln and a recovery unit, wherein the recovery unit is connected to the decomposition kiln and is used to sequentially decompose the forward-conveyed construction waste and recover the flue gas generated from incineration;

[0007] The recycling unit includes:

[0008] The primary decomposition component is located inside the decomposition kiln and includes a rotary plate for screening and rotating unrefined construction waste.

[0009] A secondary decomposition assembly, located to one side of the primary decomposition assembly, includes a oscillating roller for pulverizing uncrushed waste material; and

[0010] A recycling component is used to recover the flue gas from the incineration of construction waste, and the recycling component is connected to the decomposition kiln.

[0011] Preferably, the initial disassembly assembly further includes a rotating shaft, which is connected to a rotary plate, and a differential motor is provided at one end of the rotating shaft;

[0012] The rotary plate is provided with sieve holes for screening crushed materials, and one side of the rotary plate is provided with a feed inlet for feeding materials; the rotating shaft;

[0013] The rotating shaft is equipped with a crushing roller, and a vibrating element is provided between the crushing roller and the rotating plate.

[0014] Preferably, the rotary plate has a triangular structure centered on the crushing roller.

[0015] Preferably, the oscillating element includes an elastic element installed between two adjacent plates of the rotating plate, one end of the elastic element is provided with a connecting post, and both sides of the connecting post are provided with vibrating balls;

[0016] The connecting column is provided with a guide surface, and the crushing roller is provided with a groove for receiving the connecting column.

[0017] Preferably, the rotary plate is provided with a scraper for scraping off waste material from the surface of the crushing roller near the feed inlet.

[0018] Preferably, the re-disassembly component includes a first driving gear, which has multiple sets of drive posts along its circumferential direction. A first driven gear is meshed with the first driving gear in the circumferential direction, and the first driven gear is also provided with drive posts.

[0019] A second driving gear is provided on one side of the first driven gear. The second driving gear meshes with the drive column, and a second driven gear meshes on one side of the second driving gear. The second driving gear and the second driven gear are connected to the swing roller for crushing materials.

[0020] Preferably, the oscillating roller is provided with multiple sets of crushing blocks evenly distributed along its circumference.

[0021] Preferably, the recycling component includes a connecting pipe connected to one side of the decomposition kiln, with a collection box connected to the end of the connecting pipe away from the decomposition kiln.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention, through its preliminary decomposition component, utilizes crushing rollers to collect larger impurities in construction waste through the feed inlet into a rotating plate. The varying rotation speeds of the crushing rollers within the rotating plate cause the impurities to be compressed within the space between the crushing rollers and the rotating plate, thus crushing the larger impurities in the construction waste. This solves the problem of incomplete pulverization of construction waste, which leads to incomplete recovery of flue gas from the recycling bin.

[0024] 2. The present invention uses a vibrating element, which works in conjunction with the groove on the crushing roller to shake off the debris adhering to the rotating plate, thereby reducing the amount of waste adhering to the rotating plate without affecting the use of the crushing roller and the rotating plate.

[0025] 3. This invention utilizes a secondary decomposition component, employing two oscillating rollers that swing in opposite directions to further crush and decompose the waste material within the decomposition kiln. The synchronous, opposite movements accelerate the crushing process, thereby achieving waste material treatment and solving the problem of incomplete crushing of existing construction waste, which leads to incomplete recovery of flue gas from construction waste combustion. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall positive axis structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the initial disassembly component structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the front view of the component structure in the initial disassembly of the present invention;

[0030] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0031] Figure 6 This is a schematic diagram of the cross-sectional structure of the component parts of the present invention.

[0032] Figure 7 This is a schematic diagram of the front view of the component structure after further disassembly in this invention.

[0033] In the diagram: 100, decomposition kiln; 1, recovery unit; 11, primary decomposition assembly; 12, secondary decomposition assembly; 13, recovery assembly; 111, rotary plate; 112, rotating shaft; 113, differential motor; 114, sieve hole; 115, feed inlet; 116, crushing roller; 117, vibrating element; 1171, elastic element; 1172, connecting column; 1173, vibrating ball; 1174, guide surface; 1175, groove; 118, scraper; 121, swing roller; 122, first driving gear; 123, drive column; 124, first driven gear; 125, second driving gear; 126, second driven gear; 127, crushed block; 131, connecting pipe; 132, collection box. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Please see Figure 1-2 The present invention provides a technical solution: a construction waste exhaust gas recovery system, including a decomposition kiln 100 and a recovery unit 1, wherein the recovery unit 1 is connected to the decomposition kiln 100 and is used to sequentially decompose the construction waste conveyed forward and recover the flue gas generated by incineration.

[0037] The recycling unit 1 includes:

[0038] The primary decomposition component 11 is located inside the decomposition kiln 100, and the decomposition component includes a rotary plate 111, which is used to screen and carry unrefined construction waste for rotation.

[0039] A secondary decomposition component 12, disposed on one side of the primary decomposition component 11, includes a oscillating roller 121 for rolling and crushing uncrushed waste material; and

[0040] The recycling component 13 is used to recover the flue gas from the incineration of construction waste, and the recycling component 13 is connected to the decomposition kiln 100.

[0041] Please see Figure 3-5 The initial decomposition component 11 also includes a rotating shaft 112, which is connected to the rotary plate 111, and a differential motor 113 is provided at one end of the rotating shaft 112.

[0042] The rotary plate 111 is provided with a screen hole 114 for screening broken materials, and a feed inlet 115 for feeding is provided on one side of the rotary plate 111.

[0043] The rotating shaft 112 is provided with a crushing roller 116, and a vibrating element 117 is provided between the crushing roller 116 and the rotating plate 111;

[0044] During the disassembly process, the rotary plate 111 and the crushing roller 116 rotate at different speeds under the action of the differential motor 113, with the rotary plate 111 rotating at a speed lower than that of the crushing roller 116.

[0045] Waste that has not been completely crushed remains in the decomposition kiln 100. The rotating plate 111 rotates and carries the crushed material from the decomposition kiln 100 into the rotating plate 111 from the feed inlet 115. As the rotating plate 111 continues to rotate, the waste continues to move with the rotating plate 111 and falls onto the flat plate of the rotating plate 111. The waste is then placed between the flat plate and the crushing roller 116. Under the rotation of the crushing roller 116, the waste can be further crushed.

[0046] During feeding, finely crushed waste material will also enter. This waste material will fall back into the decomposition kiln 100 through the screen holes 114 on the rotary plate 111, and the crushed material will also fall into the decomposition kiln 100 through the screen holes 114.

[0047] Please see Figure 3-5 The rotary plate 111 has a triangular structure centered on the crushing roller 116. The triangular structure facilitates the formation of a small space between the rotary plate 111 and the crushing roller 116, enabling the waste material to be crushed within a small space.

[0048] Please see Figure 3-5 The oscillating element 117 includes an elastic element 1171 installed between two adjacent plates of the rotary plate 111. One end of the elastic element 1171 is provided with a connecting post 1172, and both sides of the connecting post 1172 are provided with vibrating balls 1173.

[0049] The connecting column 1172 is provided with a guide surface 1174, and the crushing roller 116 is provided with a groove 1175 for receiving the connecting column 1172;

[0050] The elastic element 1171 is preferably a spring, and the spring is initially in a compressed state; after...

[0051] As the crushing roller 116 rotates, the groove 1175 rotates along with it. After rotating to the position of the connecting column 1172, it will fall into the groove 1175 under the action of the elastic element 1171. The elastic element 1171 extends, causing the vibrating balls 1173 on both sides of the connecting column 1172 to vibrate the rotating plate 111. The crushing roller 116 continues to rotate and disengages from the connecting column 1172. After disengagement, the connecting column 1172 continues to abut against the crushing roller 116 under the action of the elastic element 1171, repeating the above movement to perform the vibration effect.

[0052] Please see Figure 3-4 The rotary plate 111 is provided with a scraper 118 near the feed inlet 115 for scraping off waste material from the surface of the crushing roller 116. The scraper 118 can scrape off the debris adhering to the surface of the crushing roller 116, so as to improve the crushing effect.

[0053] Example 2

[0054] Please see Figure 6-7 Components identical or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0055] Please see Figure 6-7 The re-disassembly component 12 includes a first drive gear 122, which has multiple sets of drive posts 123 along its circumferential direction. A first driven gear 124 is meshed with the first drive gear 122 in the circumferential direction, and the first driven gear 124 is also provided with drive posts 123.

[0056] A second driving gear 125 is provided on one side of the first driven gear 124. The second driving gear 125 meshes with the drive column 123, and a second driven gear 126 meshes on one side of the second driving gear 125. The second driving gear 125 and the second driven gear 126 are connected to the swing roller 121 for crushing materials.

[0057] The power unit drives the first drive gear 122 to rotate, and through the transmission of the first drive gear 122, the swaying roller moves to crush the waste material.

[0058] The preferred power source is an electric motor;

[0059] The motor drives the first drive gear 122 to rotate. While the first drive gear 122 rotates, it not only causes the first driven gear 124 to rotate relative to it, but also drives the drive column 123 to rotate around the center of the second drive gear 125. The drive column 123 meshes with the second drive gear 125, causing the second drive gear 125 to rotate, which can cause the swing roller 121 at one end to rotate. The second drive gear 125 meshes with the second driven gear 126, which can cause the swing roller 121 on the second driven gear 126 to rotate.

[0060] Furthermore, the first driven gear 124 rotates in the opposite direction to the first driving gear 122. After the second driving gear 125 rotates and disengages from the drive column 123 on the first driving gear 122, the drive column 123 on the first driven gear 124 meshes with the first driving gear 122 again, which can change the rotation direction of the second driving gear 125, thereby realizing the rotation of the swing roller 121 in opposite directions.

[0061] Please see Figure 6-7 The oscillating roller 121 is provided with a plurality of crushing blocks 127 evenly arranged along its circumference;

[0062] The crushing block 127 is in direct contact with the crushed material. The surface of the crushing block 127 is arrow-shaped, which facilitates the crushing of the material during the grinding process. At the same time, the crushing blocks 127 can touch each other to clean up the crushed material adhering to both.

[0063] Please see Figure 1-2 The recycling component 13 includes a connecting pipe 131 connected to one side of the decomposition kiln 100, and the end of the connecting pipe 131 away from the decomposition kiln 100 is connected to a collection box 132.

[0064] Construction waste produces harmful gases during incineration, which need to be collected. Gas collection is an existing technology and will not be discussed in detail here.

[0065] When construction waste is processed, incineration produces flue gas. The flue gas is collected in collection box 132 using a connected pipe to reduce pollution to the outside world.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction and demolition waste recycling system comprising a decomposition kiln (100), characterised in that: Also includes: The recycling unit (1) is connected to the decomposition kiln (100) and is used to sequentially decompose the construction waste conveyed forward and recover the flue gas generated by incineration. The recycling unit (1) includes: The primary decomposition component (11) is located inside the decomposition kiln (100) and includes a rotary plate (111) for screening and rotating unrefined construction waste. A secondary decomposition assembly (12), located on one side of the primary decomposition assembly (11), includes a oscillating roller (121) for rolling and crushing uncrushed waste material; and A recycling component (13) is used to recycle the flue gas from the incineration of construction waste, and the recycling component (13) is connected to the decomposition kiln (100); The primary decomposition component (11) also includes a rotating shaft (112), which is connected to a rotary plate (111). One end of the rotating shaft (112) is provided with a differential motor (113). The rotary plate (111) is provided with a screen hole (114) for screening the crushed material. A feed inlet (115) for feeding is provided on one side of the rotary plate (111). A crushing roller (116) is provided on the rotating shaft (112). A vibrating element (117) is provided between the crushing roller (116) and the rotary plate (111). A scraper (118) for scraping off waste material from the surface of the crushing roller (116) is provided in the rotary plate (111) near the feed inlet (115). The vibrating element (117) includes an elastic element (1171) installed between two adjacent plates of the rotating plate (111). One end of the elastic element (1171) is provided with a connecting post (1172). Both sides of the connecting post (1172) are provided with vibrating balls (1173). The connecting post (1172) is provided with a guide surface (1174). The crushing roller (116) is provided with a groove (1175) for receiving the connecting post (1172). The elastic element (1171) is a spring, and the spring is initially in a compressed state. The re-disassembly assembly (12) includes a first drive gear (122), which has multiple sets of drive posts (123) along its circumference. A first driven gear (124) is meshed with the first drive gear (122) in the circumferential direction. The first driven gear (124) also has drive posts (123). A second drive gear (125) is provided on one side of the first driven gear (124). The second drive gear (125) meshes with the drive posts (123), and a second driven gear is meshed on one side of the second drive gear (125). 126), and the second driving gear (125) and the second driven gear (126) are connected to the oscillating roller (121) for crushing materials. The first driving gear (122) is connected to the power device, which is a motor. The motor drives the first driving gear (122) to rotate, causing the first driven gear (124) to rotate relative to it. The motor also drives the drive column (123) to rotate around the center of the second driving gear (125), causing the second driving gear (125) to rotate, causing the oscillating roller (121) at one end to rotate, and causing the oscillating roller 121 on the second driven gear 126 to rotate. The first driven gear (124) rotates in the opposite direction to the first driving gear (122). After the second driving gear (125) rotates and disengages from the drive post (123) on the first driving gear (122), the drive post (123) on the first driven gear (124) meshes with the first driving gear (122) again, causing the rotation direction of the second driving gear (125) to change, thus causing the oscillating roller (121) to rotate in opposite directions.

2. A construction and demolition waste recycling system according to claim 1, wherein: The rotary plate (111) has a triangular structure centered on the crushing roller (116).

3. A construction and demolition waste recycling system according to claim 1, wherein: Multiple sets of crushing blocks (127) are evenly arranged on the oscillating roller (121) along its circumference.

4. A construction and demolition waste recycling system according to claim 1, wherein: The recycling component (13) includes a connecting pipe (131) connected to one side of the decomposition kiln (100), and the end of the connecting pipe (131) away from the decomposition kiln (100) is connected to a collection box (132).

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