Domestic garbage flue gas secondary combustion chamber device capable of efficiently combusting

Abstract

The utility model relates to the technical field of garbage treatment equipment, in particular to an efficient combustion household garbage flue gas secondary combustion chamber device, which comprises a gas inlet chamber, a pyrolysis gasification furnace, a flue gas preheating mechanism and a secondary combustion mechanism, one end of the gas inlet chamber is connected with the pyrolysis gasification furnace, and the other end of the gas inlet chamber is provided with a combustion chamber for flue gas combustion; a flue gas preheating mechanism is arranged in the gas inlet chamber and is used for preheating combustion flue gas; a secondary combustion mechanism is arranged in the combustion chamber and used for secondary combustion of smoke. The secondary combustion mechanism comprises a first chamber, a second chamber, a third chamber and a heat storage assembly, the first chamber is a flue gas mixing chamber, the second chamber is a first combustion chamber, and the third chamber is a second combustion chamber. According to the utility model, the problem of continuous combustion caused by unstable gas phase of pyrolysis flue gas can be effectively solved, the pyrolysis flue gas can be heated for multiple times through the heating assembly, and the secondary combustion efficiency and stability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage treatment equipment technical field especially relates to a kind of life garbage flue gas secondary combustion chamber device of efficient combustion. BACKGROUND

[0002] With the acceleration of urbanization, the amount of life garbage is rising sharply, and garbage incineration, as an important garbage disposal method, has significant advantages such as volume reduction, weight reduction and energy recovery, and has been widely used worldwide. However, the flue gas generated during garbage combustion has caused serious environmental pollution problems. The flue gas generated after garbage incineration contains a large amount of harmful substances, such as acid gases, dioxin substances and incompletely combusted combustible gases. If these pollutants are directly discharged without effective treatment, they will cause great harm to the atmospheric environment, the ecological system and human health.

[0003] In order to reduce the emission of pollutants in flue gas, secondary combustion technology has emerged. The traditional secondary combustion chamber aims to further oxidize and decompose the combustible gases in the flue gas after the first combustion to reduce the emission of harmful gases. However, there are still many problems in actual operation. One of the key problems is the instability of the gas phase of flue gas. First, due to the difference in seasons, the moisture content of garbage collected in the rainy season is higher. After direct pyrolysis reaction, the temperature of flue gas is lower than that in the dry season, and it is difficult to ignite. Second, during the process of guiding flue gas from the first combustion chamber to the secondary combustion chamber, flue gas will inevitably exchange heat with the surrounding environment, resulting in a significant decrease in temperature. Low-temperature flue gas entering the secondary combustion chamber not only significantly increases the ignition difficulty of secondary combustion, but also seriously affects the combustion efficiency and stability. When the temperature of flue gas is lower than the ignition point of combustible gas, a large amount of energy needs to be consumed to provide the heat required for ignition. During the combustion process, due to the low temperature, the combustion reaction rate is slow, and it is difficult to fully combust the combustible gas, resulting in an increase in the emission of incomplete combustion products and further aggravating environmental pollution. In addition, the structure design of traditional secondary combustion chamber is often simple, and lacks effective heating and preheating mechanism. For the flue gas entering the combustion chamber, it cannot be heated multiple times and efficiently, so that the combustion process is difficult to maintain in the ideal high-temperature state, which is one of the important factors leading to low secondary combustion efficiency.

[0004] In view of the obvious deficiencies of the traditional household waste flue gas secondary combustion technology in treating low-temperature flue gas and improving combustion efficiency, we design a secondary combustion chamber device that utilizes the heat released by the secondary combustion chamber itself and waste heat utilization to heat the function, which can effectively solve the problem of unstable flue gas phase and difficult combustion caused by too low temperature in the process of high-temperature pyrolysis and gasification of waste treatment, and through the optimized design of the heating assembly, multiple heating of the flue gas is realized, the secondary combustion efficiency and stability are significantly improved, and the emission of pollutants in the flue gas is minimized. Content of the utility model

[0005] In view of the technical problems in the background art, the utility model provides a kind of high-efficiency combustion's household waste flue gas secondary combustion chamber device, can effectively solve the sustained combustion problem caused by unstable flue gas phase, and through the optimized design of the heating assembly, multiple heating of the flue gas is realized, the secondary combustion efficiency and stability are significantly improved.

[0006] The technical implementation scheme of the utility model is as follows:

[0007] A kind of high-efficiency combustion's household waste flue gas secondary combustion chamber device, including intake chamber, combustion chamber, flue gas preheating mechanism and secondary combustion mechanism, intake chamber one end is connected with pyrolysis gasifier, and the other end of intake chamber is provided with combustion chamber for flue gas combustion;Intake chamber is provided with flue gas preheating mechanism inside, for the preheating of combustion flue gas;Combustion chamber is provided with secondary combustion mechanism inside, for the secondary combustion of flue gas;The secondary combustion mechanism includes first chamber, second chamber, third chamber and heat storage component, the first chamber is flue gas mixing chamber, the second chamber is first combustion chamber, and the third chamber is second combustion chamber;Heat storage component is arranged between the first chamber and the second chamber, for the reheating of flue gas.

[0008] Optionally, the flue gas preheating mechanism includes a return flue duct, a heating chamber and a second gas outlet, the heating chamber is arranged inside the intake chamber, one end of the heating chamber is connected with the first gas outlet on the third chamber through the return flue duct, and the other end of the heating chamber is connected with the purifier through the second gas outlet.

[0009] Optionally, the heat storage component includes high-alumina heat storage hole plate, high-alumina heat storage honeycomb hole brick, heat storage ball and air hole, the high-alumina heat storage honeycomb hole brick is arranged inside the combustion chamber through the high-alumina heat storage hole plate, and a plurality of heat storage balls and air holes are arranged on the high-alumina heat storage honeycomb hole brick to heat the flue gas passing through.

[0010] Optionally, the combustion chamber is a cylindrical cavity structure with open upper and lower ends, and a temperature-resistant and heat-insulating cotton layer and a refractory layer are arranged on the inner wall of the combustion chamber, and the temperature-resistant and heat-insulating cotton layer is located between the refractory layer and the outer wall of the combustion chamber; the outer portion of the combustion chamber is provided with a first combustion observation port, a second combustion observation port and an oxygen increasing adjusting port, the first combustion observation port and the second combustion observation port are respectively arranged corresponding to the third chamber and the second chamber, and the oxygen increasing adjusting port is arranged corresponding to the first chamber.

[0011] Optionally, an observation platform is arranged at the upper portion of the combustion chamber, and a smoke dust collecting groove and a pressure relief mechanism are arranged at the lower portion of the combustion chamber for collecting dust after combustion and relieving pressure; an observation ladder, a first temperature sensor and a second temperature sensor are arranged on the outer wall of the combustion chamber, and the first temperature sensor and the second temperature sensor are respectively arranged corresponding to the third chamber and the second chamber for sensing the internal combustion temperature.

[0012] Optionally, an air inlet pipeline is arranged in the air inlet chamber, one end of the air inlet pipeline is connected with the pyrolysis gasification furnace, and the other end of the air inlet pipeline penetrates through the heating chamber and is connected with the first chamber.

[0013] Optionally, one end of the air inlet chamber is provided with a second combustion chamber smoke observation port, a second combustion chamber smoke return observation port, a flue gas detection sampling port and a flue gas temperature sensor for observing the flue gas state during smoke return preheating.

[0014] Optionally, the second chamber and the third chamber are both provided with a heat storage assembly at the top of the third chamber for multiple heating of flue gas.

[0015] Optionally, the pyrolysis gasification furnace further comprises a furnace body, a pyrolysis chamber, a sealing mechanism and a feeding mechanism, the furnace body is a rectangular cavity structure with an open upper portion, and the furnace body is connected with the pyrolysis chamber through a fixed support inside the furnace body, and the pyrolysis chamber is provided with a feeding mechanism at the upper portion for uniform introduction of garbage; the feeding mechanism comprises a support plate, a feeding hopper, a discharging pipe, a connecting hole and a material passing mechanism, the support plate is movably connected with a connecting rod on the furnace body through a movable connecting hole on the side of the support plate, and the side of the support plate is connected with a first hydraulic cylinder on the furnace body to form an up-down advancing structure.

[0016] Optionally, the feeding hopper is a rectangular cavity structure with an open upper portion, and the feeding hopper is provided with a discharging pipe at the lower portion, and the discharging pipe is movably connected with the connecting hole of the support plate, a bearing is arranged between the discharging pipe and the connecting hole, a first sprocket is arranged on the outer wall of the discharging pipe, and the first sprocket is connected with a second sprocket on the output shaft of a first driving motor through a first chain to form a rotating structure; the first driving motor is arranged at the lower portion of the support plate through a motor support.

[0017] Optionally, the lower part of the feeding pipe is provided with a material passing mechanism, the material passing mechanism comprises a first material passing pipe, a first material guide groove, a second material guide groove, a movable connecting rod and a pressure spring, one end of the first material passing pipe is connected with the tail part of the feeding pipe, a first material guide groove is arranged on the other end of the first material passing pipe, and the first material guide groove movably has a second material guide groove arranged thereon; the second material guide groove is movably connected with the second sliding strip on the first material guide groove through the second sliding groove on the side part, the side part of the second material guide groove is provided with a first fixing plate, the first fixing plate is movably connected with the second fixing plate on the outer wall of the first material passing pipe through the movable connecting rod, and the outer wall of the movable connecting rod is sleeved with the pressure spring to form an elastic structure; one end of the movable connecting rod is connected with a winding wheel on the fixing sleeve through a steel wire rope; the winding wheel is arranged on the rotating shaft of the fixing sleeve, and the rotating shaft is connected with the second driving motor.

[0018] Optionally, the outer wall of the first material passing pipe is further sleeved with a scraping mechanism, the scraping mechanism comprises a fixer, a movable sleeve, a driving arm, a rack, a gear, a scraping plate and a third driving motor, the fixer is arranged on the first material passing pipe through a connecting hole, one end of the fixer is provided with the movable sleeve, the inside of the movable sleeve is provided with the driving arm, one end of the driving arm is provided with the scraping plate for scraping the garbage; the driving arm is slidably connected with the third sliding groove in the inside of the movable sleeve through the third sliding strips on the two sides, the rack is arranged on the driving arm, the rack is in meshing connection with the gear on the movable sleeve, the gear is arranged on the second rotating shaft, and one end of the second rotating shaft is connected with the third driving motor through the shaft coupling.

[0019] Optionally, the sealing mechanism comprises a pushing platform, a receiving support frame, a second hydraulic cylinder and an external connecting rod, the pushing platform is movably connected with the fourth sliding strip on the inner wall of the external connecting rod through the fourth sliding groove on the side part, the external connecting rod is arranged on one side of the furnace body, the receiving support frame is arranged on the upper part of the pushing platform, the second hydraulic cylinder is arranged on the receiving support frame, the output shaft of the second hydraulic cylinder is connected with the sealing cover, one end of the pushing platform is connected with the third hydraulic cylinder on the external connecting rod, and the pushing structure is formed.

[0020] Optionally, one side of the furnace body is provided with a rectangular opening, and the rectangular opening is provided with an opening and closing door; one side of the furnace body is provided with a smoke outlet pipe, and the smoke outlet pipe is connected with the air inlet chamber; the other side of the furnace body is provided with a smoke return pipe, and the smoke return pipe is connected with the shunt pipeline.

[0021] The utility model has the advantages of the following:

[0022] 1. The utility model discloses a gas inlet chamber and combustion chamber, wherein the gas inlet chamber is used for guiding the flue gas generated by the pyrolysis gasifier into the combustion chamber, and a flue gas preheating mechanism is arranged in the gas inlet chamber, which can guide the flue gas generated by the combustion chamber into the heating chamber again, preheat the flue gas on the gas inlet pipeline, and then guide it into the purification equipment, thereby realizing the recycling of waste heat, preheating the flue gas poured later, and improving the efficiency and stability of subsequent flue gas combustion.

[0023] 2. The utility model discloses an independent combustion chamber, which is internally provided with a first chamber, a second chamber and a third chamber, the first chamber is used for mixing flue gas and air and igniting through combustion-supporting materials, the ignited flue gas enters the second chamber and the third chamber and is combusted again, wherein the second chamber and the third chamber need a higher temperature for combustion, therefore, a heat storage assembly is designed, the high-alumina heat storage hole plate stores heat in the early stage of heat storage balls, heats the flue gas quickly when the subsequent flue gas enters, and the special arrangement of the heat storage material increases the residence time of the flue gas, thereby achieving the purpose of fast and efficient combustion and effectively improving the secondary combustion efficiency. DRAWINGS

[0024] Figure 1 It is a structural schematic view of the utility model.

[0025] Figure 2 It is a structural schematic view of the secondary combustion mechanism of the utility model.

[0026] Figure 3 It is a right view of the utility model.

[0027] Figure 4 It is a structural schematic view of the inner wall part of the combustion chamber of the utility model.

[0028] Figure 5 It is a plan view of the combustion chamber of the utility model.

[0029] Figure 6 It is a structural schematic view of the heat storage assembly part of the utility model.

[0030] Figure 7 It is a structural schematic view of the pyrolysis gasifier part of the utility model.

[0031] Figure 8 It is a main view of the pyrolysis gasifier part of the utility model.

[0032] Figure 9 It is a structural schematic view of the sealing mechanism part of the utility model.

[0033] Figure 10 It is a structural schematic view of the explosion-proof structure of the pyrolysis gasifier of the utility model.

[0034] Figure 11 It is the structure schematic view of the feeding mechanism of the utility model.

[0035] Figure 12 It is the main view of the feeding mechanism of the utility model.

[0036] Figure 13 It is the structure schematic view of the feeding mechanism of the utility model.

[0037] Figure 14 It is the structure schematic view of the feeding mechanism of the utility model.

[0038] Figure 15 It is the structure schematic view of the scraping mechanism of the utility model.

[0039] The meaning of the reference sign in the drawing: 1 - air inlet chamber, 2 - combustion chamber, 3 - pressure relief mechanism, 4 - oxygen increasing adjusting port, 5 - first combustion observation port, 6 - secondary combustion mechanism, 601 - first chamber, 602 - second chamber, 603 - second chamber, 604 - smoke collection groove, 605 - air inlet pipeline, 7 - heat storage assembly, 701 - high-alumina heat storage hole plate, 702 - heat storage ball, 703 - high-alumina heat storage honeycomb hole brick, 704 - air permeable hole, 8 - flue gas preheating mechanism, 801 - flue gas return pipeline, 802 - heating chamber, 803 - second air outlet, 9 - feeding mechanism, 901 - first feeding pipe, 902 - first material guide groove, 903 - second material guide groove, 904 - first fixed plate, 905 - movable connecting rod, 906 - second fixed plate, 907 - pressure spring, 908 - steel wire rope, 909 - fixed sleeve, 910 - winding wheel, 911 - second driving motor, 10 - second combustion observation port, 11 - secondary combustion chamber smoke observation port, 12 - secondary combustion chamber flue gas return observation port, 13 - flue gas detection sampling port, 14 - flue gas temperature inductor, 15 - observation platform, 16 - first temperature inductor, 17 - second temperature inductor, 18 - observation ladder, 19 - furnace body, 20 - feeding mechanism, 2001 - support plate, 2002 - feeding hopper, 2003 - movable connecting hole, 2004 - motor support, 2005 - discharging pipe, 2006 - first driving motor, 2007 - first chain, 2008 - first sprocket, 2005 - discharging pipe, 2010 - bearing, 2011 - connecting hole, 21 - sealing mechanism, 2101 - pushing platform, 2102 - fourth sliding chute, 2103 - receiving support frame, 2104 - second hydraulic cylinder, 2105 - external connecting rod, 2106 - sealing cover, 22 - pyrolysis chamber, 23 - fixed support, 24 - smoke outlet pipe, 25 - opening and closing door, 26 - scraping mechanism, 2601 - fixator, 2602 - connecting hole, 2603 - movable sleeve, 2604 - third driving motor, 2605 - gear, 2606 - driving arm, 2607 - third sliding bar, 2608 - rack, 27 - flue gas return pipe. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model will be described further in detail below in combination with the drawings. Only this declaration, the up, down, left, right, front, back, inside, outside and other orientation words appearing or about to appear in the text of the utility model are based on the drawings of the utility model, and it is not the specific limitation of the utility model.

[0041] As shown in the accompanying Figures 1-6 A kind of high-efficiency combustion household garbage flue gas secondary combustion chamber device, including air inlet chamber 1, combustion chamber 2, flue gas preheating mechanism 8 and secondary combustion mechanism 6, air inlet chamber 1 one end is connected with pyrolysis gasifier, the other end of air inlet chamber 1 is provided with combustion chamber 2 for flue gas combustion;Air inlet chamber 1 inside is provided with flue gas preheating mechanism 8, for the preheating of combustion flue gas;Combustion chamber 2 inside is provided with secondary combustion mechanism 6, for the secondary combustion of flue gas;The secondary combustion mechanism 6 includes first chamber 601, second chamber 603, third chamber 602 and heat storage component 7, the first chamber 601 is flue gas mixing chamber, the second chamber 603 is first combustion chamber, the third chamber 603 is second combustion chamber;The first chamber 601, second chamber 603 between are provided with heat storage component 7, for the reheat of flue gas.

[0042] It should be noted that in the process of domestic waste incineration, secondary combustion has multiple purposes. First, in terms of pollutant emission reduction, due to the complex composition of domestic waste, primary high-temperature pyrolysis gasification often fails to completely convert combustible substances, resulting in a large amount of harmful gases such as carbon monoxide, methane, tar, total hydrocarbons, and various organic pollutants such as volatile organic compounds and polycyclic aromatic hydrocarbons, and even the generation of extremely toxic dioxins. Secondary combustion can completely oxidize carbon monoxide to carbon dioxide by supplementing sufficient oxygen and increasing temperature, decompose organic pollutants, and avoid the temperature range in which dioxins are easily generated, thereby effectively reducing pollutant emissions. Traditional secondary combustion methods generally directly ignite the flue gas to achieve secondary combustion. However, this technology has significant drawbacks. First, the flue gas will cool down over time during the flow process, making it difficult to ignite after entering the secondary combustion chamber. Second, due to the different compositions of the flue gas, the required combustion temperature is also different, which may still result in incomplete combustion. Third, the flue gas entering the combustion chamber has a low temperature, which requires a long time to heat and ignite, and the addition of combustion-supporting materials such as gasoline, coal, or electricity is required to improve combustion efficiency. The addition of combustion-supporting materials increases operating costs and carbon emissions, which does not meet the industry's carbon emission requirements. Based on this, we designed a waste flue gas secondary combustion chamber. The flue gas preheating mechanism 8 preheats the imported flue gas before entering the combustion chamber 2, reducing the ignition time. Moreover, the combustion chamber 2 is equipped with a heat storage assembly 7 to continuously heat the internal flue gas, thereby improving combustion efficiency.

[0043] It should be further noted that the combustion chamber 2 is equipped with three chambers: the first chamber 601, the second chamber 602, and the third chamber 603. The first chamber 601 is located at the bottom of the combustion chamber 2 and is used to mix the imported flue gas with air and then ignite it for the first time using combustion-supporting materials. The flue gas will burn in the second chamber 602, which is the first step of combustion. The burned flue gas enters the third chamber 603 for secondary combustion, thereby completely burning the flue gas.

[0044] It needs to be specially pointed out that in the process of domestic waste incineration, the secondary combustion mechanism 6 adopted by the design is unique, in the primary combustion stage, the heat storage assembly 7 equipped inside can continuously absorb and store heat, like a high-efficiency "heat storage bank", when entering the subsequent combustion link, the heat storage assembly 7 will release the accumulated heat energy, provide the required starting temperature for the next round of combustion, effectively make up for the problem of insufficient temperature caused by heat loss in the traditional combustion process; When the second combustion is carried out, the flue gas flows through the heat storage assembly 7 and enters the second chamber 602, the heat storage assembly 7 will cleverly implement secondary heating on the flue gas, this key step not only significantly improves the temperature of the flue gas, makes it more quickly reach the ideal combustion state, and changes the flue gas flow direction, prolongs the residence time of the flue gas, greatly shortens the time required for flue gas combustion, and effectively promotes the rapid progress of the combustion reaction, thereby comprehensively improving the combustion efficiency, providing solid and reliable technical support and guarantee for efficient and clean incineration of domestic waste.

[0045] As shown in Figures 1-4 , the flue gas preheating mechanism 8 includes a return smoke pipeline 801, a heating chamber 802 and a second gas outlet 803, the heating chamber 802 is arranged inside the air inlet chamber 1, and one end of the heating chamber 802 is connected with the first gas outlet on the third chamber 603 through the return smoke pipeline 801, and the other end of the heating chamber 802 is connected with the purifier through the second gas outlet 803.

[0046] It needs to be pointed out that the flue gas after combustion in the combustion chamber 2 also has a lot of heat, in order to recycle the heat energy, we designed a heating chamber 802 inside the air inlet chamber 1, the flue gas after combustion in the third chamber 603 is introduced into the heating chamber 802, and the entering flue gas in the internal air inlet pipeline 605 is preheated, so as to realize preheating and improve the combustion efficiency.

[0047] As shown in Figures 1-6As shown, the heat storage assembly 7 includes high-alumina heat storage hole plate 701, high-alumina heat storage honeycomb hole brick 703, heat storage ball 702 and air hole 704, the high-alumina heat storage honeycomb hole brick 703 is arranged inside the combustion chamber 2 through the high-alumina heat storage hole plate 701, and the high-alumina heat storage honeycomb hole brick 703 is provided with a plurality of heat storage balls 702 and air holes 704 through which the flue gas is heated; the combustion chamber 2 is a cylindrical cavity structure with the upper and lower ends open, and the inner wall of the combustion chamber 2 is provided with a temperature-resistant insulation cotton layer and a refractory layer, and the temperature-resistant insulation cotton layer is located between the refractory layer and the outer wall of the combustion chamber 2; the outside of the combustion chamber 2 is provided with a first combustion observation port 5, a second combustion observation port 10 and an oxygen increasing adjusting port 4, the first combustion observation port 5 and the second combustion observation port 10 are respectively arranged corresponding to the positions of the third chamber 603 and the second chamber 602, and the oxygen increasing adjusting port 4 is arranged corresponding to the position of the first chamber 601.

[0048] It should be noted that the heat storage assembly 7 can absorb heat energy when the flue gas is burned, and release heat energy in the subsequent combustion process. The design of this structure is to heat the subsequent entering flue gas, heat the flue gas to above 850℃ quickly, facilitate the rapid combustion in the second chamber 602, and design the heat storage assembly 7 between the second chamber 602 and the third chamber 603. The flue gas can be heated again during the process of entering the third chamber 603 after being burned in the second chamber 602, the residence time of the flue gas is above 2S, and the temperature is above 900℃, so that the flue gas is fully burned, and the combustible gas, dioxin and black carbon and other components in the flue gas can be effectively burned out.

[0049] It should be further explained that a plurality of heat storage balls 702 and air holes 704 are arranged on the upper part of the high-alumina heat storage honeycomb hole brick 703, and when the flue gas passes through the air hole 704 beside the heat storage ball 702, it is in full contact with the heat storage ball 702, and the cold flue gas is heated. Moreover, the heat storage ball 702 is made of corundum mullite, and the specific surface area can reach 240m2 / m3. The small ball divides the airflow into very small streams, and when the airflow flows through the heat storage body, it forms strong turbulence, effectively breaking the boundary layer on the surface of the heat storage body. Because of the small ball diameter, small conduction radius, small thermal resistance, high density and good thermal conductivity, the rapid reversing requirement can be realized, and the reversing is 25 times / h. The high-conductivity heat storage plate, heat storage ball and heat storage hole brick form heat energy complementation through special structure arrangement, and no combustion-supporting material is needed after the first ignition. After the preheating system, the combustion efficiency is improved, and the operation cost is greatly reduced.

[0050] As Figures 1-7As shown, the upper part of the combustion chamber 2 is provided with an observation platform 15, and the lower part of the combustion chamber 2 is provided with a dust collection groove 604 and a pressure relief mechanism 3 for collecting dust after combustion and pressure relief; the outer wall of the combustion chamber 2 is provided with an observation ladder 18, a first temperature sensor 16 and a second temperature sensor 17, and the first temperature sensor 16 and the second temperature sensor 17 are respectively arranged corresponding to the third chamber 603 and the second chamber 602 for sensing the internal combustion temperature; the inside of the air inlet chamber 1 is provided with an air inlet pipeline 605, one end of which is connected with the pyrolysis gasification furnace, and the other end of which penetrates the heating chamber 802 and is connected with the inside of the first chamber 601.

[0051] It should be noted that the lower part of the combustion chamber 2 is provided with a dust collection groove 604 and a pressure relief mechanism 3 for collecting dust after combustion, and the design of the pressure relief mechanism 3 can realize rapid pressure relief when the temperature inside the combustion chamber 2 is too high, so as to prevent the risk of explosion due to excessive gas pressure during internal combustion, and the design of multiple temperature sensors is to enable the operator to observe the internal combustion condition in real time, so as to facilitate real-time adjustment of air inlet and air outlet.

[0052] As shown in Figures 1-4 , one end of the air inlet chamber 1 is provided with a second combustion chamber smoke outlet observation port 11, a second combustion chamber smoke return observation port 12, a smoke detection sampling port 13 and a smoke temperature sensor 14 for observing the state of smoke during smoke return preheating; the second chamber 602 and the third chamber 603 are both provided with a heat storage assembly 7 at the top of the third chamber 603 for multiple heating of the smoke.

[0053] As shown in Figure 1 and Figure 8 , the second combustion chamber smoke outlet observation port 11 and the second combustion chamber smoke return observation port 12 are designed to enable the operator to observe the state of the smoke during smoke return, so as to facilitate smoke sampling and management of the operator.

[0054] Working principle:

[0055] The waste is precisely introduced into the pyrolysis gasifier, and under the high-temperature pyrolysis gasification reaction condition, pyrolysis flue gas is generated, which is orderly introduced into the combustion chamber 2 through the gas inlet chamber 1, and in the first chamber 601, the flue gas is fully mixed under the specific air flow guiding and disturbance, at the same time, the heat storage assembly 7 is heated according to its unique heat storage and heat release characteristics, and the heated and mixed uniform flue gas enters the second chamber 602, and further combustion reaction is carried out in the second chamber 602, and the flue gas after combustion in the second chamber 602 continues to flow into the third chamber 603, and the combustible gas in the flue gas is completely burned out due to the advanced combustion strengthening design in the third chamber 603, and at this time, the tail gas is introduced into the heating chamber 802 along the back smoke pipeline 801, and the back smoke pipeline 801 can also be heated by the third combustion, and the tail gas is in a continuous flow state when introduced into the heating chamber 802, and the heat carried by the tail gas is fully exchanged with the cold flue gas entering from the gas inlet pipeline 605, so that the recycling of heat energy is cleverly realized.

[0056] It should be noted that the heat storage assembly 7 can make the flue gas flow repeatedly based on the combined action of the high-alumina heat storage honeycomb hole brick 703, the heat storage ball 702 and the air hole 704, so that the flue gas stays for a long time. The advantage of this design is that the longer the flue gas stays, the higher the heating efficiency of the flue gas. In this way, the temperature of the entire flue gas is increased, so that the gas phase of the flue gas is kept stable, and the combustion efficiency is improved.

[0057] This heat energy cycle not only reduces the heat loss of the system, but also effectively improves the initial temperature of the cold flue gas, so that the subsequent combustion process is more smooth and efficient, and the overall flue gas combustion efficiency is significantly improved, which lays a solid foundation for efficient and low-emission waste incineration.

[0058] The following figure is the detection data of the device when the flue gas is burned:

[0059]

[0060] As the above data, the first group of tests is normal waste pyrolysis flue gas through the purifier purification and combustion, only to remove part of the particulate matter, sulfur dioxide, carbon monoxide, nitrogen oxides and other harmful substances, the remaining dioxins, carbon monoxide and other harmful substances can not be effectively removed, not meet the emission limit requirements, in the second group of tests by the flue gas combustion, effectively reduce the dioxins, carbon monoxide and other harmful substances, in the third group of experiments, by the flue gas combustion dioxins, carbon monoxide, total hydrocarbon, particulate matter and other harmful substances decreased significantly, and its value has reached the emission limit standards (GB18485-2014), so the equipment adopts three combustion process, can effectively remove the flue gas such as dioxins, carbon monoxide and other harmful substances, meet the emission limit standards, to achieve carbon emissions requirements.

[0061] As Figures 7-15 The pyrolysis gasifier further includes a furnace body 19, a pyrolysis chamber 22, a sealing mechanism 21 and a feeding mechanism 20. The furnace body 19 is a rectangular cavity structure with an open top. The furnace body 19 is connected to the pyrolysis chamber 22 through a fixed support 23. The pyrolysis chamber 22 is provided with a feeding mechanism 20 at the upper portion for uniform introduction of waste. The feeding mechanism 20 includes a support plate 2001, a feeding hopper 2002, a discharging pipe 2005, a connecting hole 2011 and a material passing mechanism 9. The support plate 2001 is movably connected to a connecting rod 22 on the furnace body 19 through a side movable connecting hole 2003. The side of the support plate 2001 is connected to a first hydraulic cylinder 2012 on the furnace body 19 to form an up-down advancing structure.

[0062] It needs to be explained that in the existing process of pyrolysis process, the common feeding means is mechanical feeding, that is, through the feeding port, the materials such as garbage are transported to the reaction chamber to carry out pyrolysis gasification reaction. However, the traditional feeding method has obvious disadvantages, and the entering garbage is easy to accumulate in the chamber, which makes it difficult for the pyrolysis reaction to proceed fully. In view of this, we newly design a feeding mechanism, which has the excellent characteristic of distributed feeding, and can effectively avoid the problem of garbage accumulation. Specifically, the feeding hopper 2002 is stably connected with the connecting hole 2011 arranged on the support plate 2001 through the feeding pipe 2005. At the same time, the support plate 2001 is equipped with a feeding mechanism 9 and a scraping mechanism 26 at the lower part. The two complement each other, which can not only help the smooth feeding of materials, but also ensure the uniform feeding of materials. It is particularly worth mentioning that the side of the support plate 2001 is closely connected with the first hydraulic cylinder 2012 on the furnace body 19, thereby building a sophisticated structure of up and down advancement. With the strong driving force of the first hydraulic cylinder 2012, the whole feeding mechanism can be easily lifted and operated. When it is needed to feed, the feeding mechanism 9 and the scraping mechanism 26 will be driven by the machine to extend into the pyrolysis chamber 22, ensuring the uniform distribution of materials. After the material guiding process is successfully completed, they can be quickly lifted and reset, and then the sealing mechanism 21 is started to tightly close the pyrolysis chamber 22, thereby achieving a highly automated feeding process, greatly improving the pyrolysis efficiency and quality.

[0063] As shown in Figures 7-15 The feeding hopper 2002 is an open rectangular cavity structure at the upper part, and the lower part of the feeding hopper 2002 is provided with a feeding pipe 2005, and the feeding pipe 2005 is movably connected with the connecting hole 2011 of the support plate 2001. A bearing 2010 is arranged between the feeding pipe 2005 and the connecting hole 2011. A first sprocket 2008 is arranged on the outer wall of the feeding pipe 2005, and the first sprocket 2008 is connected with a second sprocket on the output shaft of a first driving motor 2006 through a first chain 2007 to form a rotating structure. The first driving motor 2006 is arranged at the lower part of the support plate 2001 through a motor support 2004.

[0064] It should be noted that in the garbage disposal process, ensuring uniform distribution of garbage in the feeding stage is crucial for the efficient operation of subsequent processing procedures. Therefore, we designed an innovative rotating feeding system, which mainly optimizes the discharge pipe 2005 and the material passing mechanism 9. A first sprocket 2008 is carefully assembled on the outer wall of the discharge pipe 2005, and a high-strength, high-precision first chain 2007 is used to connect it tightly with the second sprocket on the output shaft of the first drive motor 2006, thereby building a stable and efficient rotating structure. When the system starts, the first drive motor 2006 quickly operates, driven by its powerful torque output, which drives the chain transmission and then promotes the discharge pipe 2005 to open the high-speed rotation mode. In this way, the garbage falling through the discharge pipe 2005 to the material passing mechanism 9 will gain centrifugal force with the rotation of the discharge pipe, showing a rotating falling trend. Ultimately, these garbage can be distributed in a dispersed and uniform state inside the pyrolysis chamber 22, fundamentally avoiding the problem of garbage accumulation in one place and uneven distribution, laying a solid foundation for the accurate and stable advancement of subsequent pyrolysis processes.

[0065] As shown in Figures 7-15 The lower part of the discharge pipe 2005 is provided with a material passing mechanism 9, which includes a first material passing pipe 901, a first material guide groove 902, a second material guide groove 903, an activity connecting rod 905, and a pressure spring 907. One end of the first material passing pipe 901 is connected to the tail of the discharge pipe 2005, and the other end of the first material passing pipe 901 is provided with the first material guide groove 902, and the first material guide groove 902 is movably provided with the second material guide groove 903. The second material guide groove 903 is movably connected to the second sliding bar on the first material guide groove 902 through the second sliding groove 904 on the side, and the side of the second material guide groove 903 is provided with the first fixed plate 904, and the first fixed plate 904 is movably connected to the second fixed plate 906 on the outer wall of the first material passing pipe 901 through the activity connecting rod 905. The activity connecting rod 905 is provided with a pressure spring 907 on the outer wall to form an elastic structure. One end of the activity connecting rod 905 is connected to the winding wheel 910 on the fixed sleeve 909 through the steel wire rope 908. The winding wheel 910 is arranged on the rotating shaft of the fixed sleeve 909, and the rotating shaft is connected to the second drive motor 911.

[0066] It needs to be explained that the garbage is transported to the feeding mechanism 9, and then is sent into the pyrolysis chamber 22. In the pyrolysis chamber 22, the garbage is spread in a more uniform state in the pyrolysis space by virtue of the centrifugal force generated by rotation. However, the volume of the pyrolysis chamber 22 is limited. If the feeding mechanism 9 continuously rotates to discharge the garbage in a fixed mode, the garbage on both sides of the center point of the feeding mechanism 9 will be easily accumulated, which will undoubtedly interfere with the stability and efficiency of the pyrolysis process. In view of this, the feeding mechanism 9 is endowed with the telescopic function. When the garbage is distributed under the action of rotation, the feeding mechanism 9 can flexibly adjust the discharging position to ensure that the garbage maintains a uniform distribution state in the pyrolysis chamber 22 at all times. The second guide chute 903 is movably arranged above the first guide chute 902. One end of the second guide chute 903 is movably connected with the second fixed plate 906 on the outer wall of the first feeding pipe 901 through the movable connecting rod 905. The pressure spring 907 is sleeved on the outer wall of the movable connecting rod 905. The three complement each other and jointly constitute a stable and sensitive elastic structure. Furthermore, one end of the movable connecting rod 905 is connected with the winding wheel 910 on the fixed sleeve 909 through the steel wire rope 908. When the winding wheel 910 rotates slowly, the steel wire rope 908 is wound or unwound to drive the second guide chute 903 to telescopically extend forward and backward to adjust the direction of the garbage discharging point. Once the winding wheel 910 stops exerting force and releases the steel wire rope 908, the pressure spring 907 will drive the entire structure to quickly recover to the initial state by virtue of the elastic potential energy accumulated by itself, thereby preparing for the next round of adjustment.

[0067] As shown in Figures 7-15 The outer wall of the first feeding pipe 901 is also sleeved with the scraping mechanism 26. The scraping mechanism 26 comprises a fixed device 2601, a movable sleeve 2603, a driving arm 2606, a rack 2608, a gear 2605, a scraping plate 2609 and a third driving motor 2604. The fixed device 2601 is arranged on the first feeding pipe 901 through the connecting hole 2602. One end of the fixed device 2601 is provided with the movable sleeve 2603. The inside of the movable sleeve 2603 is provided with the driving arm 2606. One end of the driving arm 2606 is provided with the scraping plate 2609 for scraping the garbage. The driving arm 2606 is slidably connected with the third sliding slot in the inside of the movable sleeve 2603 through the third sliding bars 2607 on both sides. The rack 2608 is arranged on the driving arm 2606 and is in meshing connection with the gear 2605 on the movable sleeve 2603. The gear 2605 is arranged on the second rotating shaft, and one end of the second rotating shaft is connected with the third driving motor 2604 through the coupling.

[0068] It should be noted that the setting of the scraping mechanism 26 is to carry out the re-scraping treatment of the garbage in the rotating process, wherein the inside of the movable sleeve 2603 is provided with the driving arm 2606, one end of the driving arm 2606 is provided with the scraping plate 2609, and the driving arm 2606 can be adjusted left and right under the driving of the third driving motor 2604. The advantage of this design is that the scraping plate 2609 can be adjusted back, which can cooperate with the material passing mechanism 9 to scrape and smooth, and can also be recycled when entering and leaving the pyrolysis chamber 22, so as to avoid interference when entering.

[0069] Further comprising a sealing mechanism 21, the sealing mechanism 21 comprises a pushing platform 2101, a receiving support frame 2103, a second hydraulic cylinder 2104 and an external connecting rod 2105, the pushing platform 2101 is movably connected with the fourth sliding strip on the inner wall of the external connecting rod 2105 through the fourth sliding groove 2102 on the side, and the external connecting rod 2105 is arranged on one side of the furnace body 19, the receiving support frame 2103 is arranged on the upper part of the pushing platform 2101, and the second hydraulic cylinder 2104 is arranged on the receiving support frame 2103, the output shaft of the second hydraulic cylinder 2104 is connected with a sealing cover 2106, and one end of the pushing platform 2101 is connected with a third hydraulic cylinder on the external connecting rod 2105, forming a pushing structure.

[0070] It should be noted that the design of the sealing mechanism 21 is to seal the upper part of the pyrolysis chamber 22 after the feeding is completed, wherein the whole pushing platform 2101 is pushed based on the third hydraulic cylinder, and after the pushing platform 2101 reaches the position, the sealing cover 2106 on the pushing platform 2101 can complete the sealing of the pyrolysis chamber 22 under the pushing of the second hydraulic cylinder 2104.

[0071] One side of the furnace body 19 is provided with a rectangular opening, and the rectangular opening is provided with an opening and closing door 25; one side of the furnace body 19 is provided with a smoke outlet pipe 24, and the smoke outlet pipe 24 is connected with the air inlet chamber 1, the other side of the furnace body 19 is provided with a smoke return pipe 27, and the smoke return pipe 27 is connected with a shunt pipeline.

[0072] It should be noted that the smoke return pipe 27 extends into the inside of the pyrolysis chamber 22, which can continuously guide the smoke to heat the inside garbage, so as to improve the reaction temperature and accelerate the reaction efficiency.

[0073] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A high-efficiency combustion household waste flue gas secondary combustion chamber device, comprising an air inlet chamber (1), a combustion chamber (2), a flue gas preheating mechanism (8) and a secondary combustion mechanism (6), characterized in that, The gas inlet chamber (1) is connected with a pyrolysis gasifier at one end, and a combustion chamber (2) is arranged at the other end of the gas inlet chamber (1) for secondary flue gas combustion; A flue gas preheating mechanism (8) is arranged in the gas inlet chamber (1) for preheating flue gas generated by the pyrolysis gasifier; A secondary combustion mechanism (6) is arranged in the combustion chamber (2) for secondary combustion of flue gas; The secondary combustion mechanism (6) comprises a first chamber (601), a second chamber (602), a third chamber (603) and a heat storage assembly (7), the first chamber (601) is a flue gas mixing chamber, the second chamber (602) is a first combustion chamber, and the third chamber (603) is a second combustion chamber; The heat storage assembly (7) is arranged between the first chamber (601) and the second chamber (602) to absorb heat and then release heat, thereby providing heat for flue gas. The flue gas preheating mechanism (8) comprises a flue gas return pipeline (801), a heating chamber (802) and a second gas outlet (803), the heating chamber (802) is arranged in the gas inlet chamber (1), one end of the heating chamber (802) is connected with a first gas outlet on the third chamber (603) through the flue gas return pipeline (801), and the other end of the heating chamber (802) is connected with a purifier at the rear end through the second gas outlet (803).

2. The high-efficiency combustion household garbage flue gas secondary combustion chamber device according to claim 1, characterized in that, The heat storage assembly (7) comprises a high-alumina heat storage hole plate (701), a high-alumina heat storage honeycomb hole brick (703), heat storage balls (702) and air permeable holes (704), the high-alumina heat storage honeycomb hole brick (703) is arranged in the combustion chamber (2) through the high-alumina heat storage hole plate (701), and a plurality of heat storage balls (702) and air permeable holes (704) are arranged on the high-alumina heat storage honeycomb hole brick (703) to heat flue gas passing through.

3. The high-efficiency combustion household garbage flue gas secondary combustion chamber device according to claim 2, characterized in that, The combustion chamber (2) is a cylindrical cavity structure with openings at the upper end and the lower end, and a temperature-resistant insulation cotton layer and a refractory layer are arranged on the inner wall of the combustion chamber (2), and the temperature-resistant insulation cotton layer is located between the refractory layer and the outer wall of the combustion chamber (2); 4. The high-efficiency combustion household garbage flue gas secondary combustion chamber device according to claim 3, characterized in that, A first combustion observation port (5) and a second combustion observation port (10) and an oxygen increasing adjusting port (4) are arranged on the outer wall of the combustion chamber (2), the first combustion observation port (5) and the second combustion observation port (10) are arranged corresponding to the third chamber (603) and the second chamber (602) respectively, and the oxygen increasing adjusting port (4) is arranged corresponding to the first chamber (601). An observation platform (15) is arranged at the upper part of the combustion chamber (2), and a dust collecting groove (604) and a pressure relief mechanism (3) are arranged at the lower part of the combustion chamber (2) for collecting dust after combustion and relieving pressure; 5. The high-efficiency combustion household waste flue gas secondary combustion chamber device according to claim 4, characterized in that, An observation ladder (18), a first temperature sensor (16) and a second temperature sensor (17) are arranged on the outer wall of the combustion chamber (2), the first temperature sensor (16) and the second temperature sensor (17) are arranged corresponding to the third chamber (603) and the second chamber (602) respectively, and are used for sensing the internal combustion temperature. ​ 6. The high-efficiency combustion household waste flue gas secondary combustion chamber device according to claim 1, characterized in that, The gas inlet chamber (1) is internally provided with a gas inlet pipeline (605), one end of the gas inlet pipeline (605) is connected with the pyrolysis gasifier, and the other end of the gas inlet pipeline (605) penetrates the heating chamber (802) and is connected with the first chamber (601) internally.

7. The high-efficiency combustion household waste flue gas secondary combustion chamber device according to claim 6, characterized in that, One end of the gas inlet chamber (1) is provided with a secondary combustion chamber smoke observation view (11), a secondary combustion chamber back smoke observation view (12), a flue gas detection sampling port (13) and a flue gas temperature sensor (14) for observing the flue gas state during back smoke preheating.

8. The high-efficiency combustion household waste flue gas secondary combustion chamber device according to claim 1, characterized in that, The second chamber (602) and the third chamber (603) are both provided with heat storage assemblies (7) at the top of the third chamber (603) for multiple heating of the flue gas.

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