Emergency discharge chimney structure of secondary combustion chamber of solid waste treatment device

Abstract

An emergency discharge chimney structure of a secondary combustion chamber of a solid waste treatment device comprises a discharge barrel, a discharge door, a rotating arm assembly, a driving mechanism and an emergency discharge chimney barrel, and the emergency discharge chimney barrel covers the radial outer side of the discharge barrel. The emergency discharge chimney barrel is provided with a discharge port with the vertical height higher than that of the smoke outlet and an air inlet with the vertical height lower than that of the smoke outlet. When the exhaust door is opened, high-temperature flue gas at the temperature of 1100 DEG C in the secondary combustion chamber is discharged instantly, due to density difference caused by temperature difference, the high-temperature flue gas rises, meanwhile, a low-pressure area is formed at the bottom, the bottom of the chimney barrel is of a flying structure, normal-temperature air can be rapidly sucked into the low-pressure area from the bottom of the chimney, and in the continuous discharging process of the high-temperature flue gas, the normal-temperature air can be rapidly sucked into the low-pressure area. A large amount of air at the bottom can be continuously sucked into the chimney and is mixed with high-temperature flue gas, the temperature of the mixed flue gas is rapidly reduced, the temperature is within the temperature-resistant range of a chimney material, and the function that the high-temperature flue gas is sent to a high place to be discharged under the condition that no refractory material exists in the chimney is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid waste incineration treatment, in particular to an emergency emission chimney structure of a secondary combustion chamber of a solid waste treatment device. Background Art

[0002] The incineration of hazardous wastes is mostly carried out in rotary kilns. The rear of the rotary kiln incinerator is equipped with a secondary combustion chamber, which is equipped with an emergency chimney. The main function of the emergency chimney is to release the flue gas when the pressure in the furnace exceeds the set pressure value when positive pressure combustion, deflagration, power outage and other unexpected situations occur in the incinerator, so as to avoid equipment explosion, subsequent equipment damage and other malignant accidents. Especially for the combustion treatment of liquid hazardous wastes such as waste residue oil, waste mineral oil, waste organic solvents, and waste emulsions, it is particularly important that the emergency chimney can be opened in a timely and effective manner.

[0003] The secondary combustion chamber is a high-temperature incineration equipment, which is widely used in the treatment of industrial solid waste, liquid waste and gaseous waste, etc. It can efficiently convert hazardous waste into harmless substances and reduce the occurrence of environmental pollution. Since the secondary combustion chamber is a key link in the incineration system, the design of its safety performance is particularly important. A flue gas emergency discharge device must be installed on the top of the secondary combustion chamber to avoid the high-temperature flue gas in the secondary combustion chamber causing safety accidents and failure losses to the entire incineration system when the system fails.

[0004] At present, the emergency discharge device of the secondary combustion chamber in China is mainly divided into two structural forms: the first is the cylinder (internal refractory material) + discharge door; the second is the cylinder (internal refractory material) + discharge door + emergency discharge chimney. Different design structures will have a great impact on the manufacturing cost, maintenance cost and service life of the device, so it is necessary to further optimize the structure of the emergency discharge device based on relevant knowledge and accumulated engineering experience, and ensure the improvement of safety maintenance performance and reliability performance under the premise of reasonable cost.

[0005] Problems with the prior art: 1. Some emergency emission devices are not designed with external emergency emission chimneys. When the emission door is opened, the high-temperature flue gas in the second combustion chamber will be instantly discharged from the emergency emission door. The flue gas velocity and temperature are both high, with the temperature reaching 1100°C, which will cause irreversible damage to surrounding equipment and buildings. Due to the low location of the emission point, the surrounding electronic instruments and electrical equipment will also fail due to heat, causing system failure.

[0006] 2. Some emergency discharge devices are equipped with emergency discharge chimneys outside the discharge door. Although the smoke is discharged from a high place through the chimney, in order to avoid leakage of high-temperature smoke, the connection between the bottom of the chimney and the secondary combustion chamber is a completely sealed structure. Since the inner tube of the chimney is in continuous contact with the high-temperature smoke, the inner tube of the chimney needs to be lined with refractory materials, which greatly increases the weight of the chimney, resulting in an increase in the design load of the steel structure on the top of the secondary combustion chamber, and also increases the construction difficulty and engineering cost.

[0007] 3. The drive of the discharge door mainly relies on the action of the cylinder. Generally, the cylinder of the emergency discharge device is installed on the cylinder connector at the discharge door. The cylinder is close to the discharge door. When high-temperature flue gas is discharged, the cylinder will be affected by the high temperature, reducing the service life of the cylinder and even causing the cylinder to fail.

[0008] 4. The rotating arm of the discharge door needs to have a certain amount of rotation space. Generally, a hole is opened at the corresponding position on the wall of the emergency discharge chimney. Most of the opening positions are not designed to be sealed. When the internal discharge door is opened, high-temperature flue gas will escape from the chimney opening, causing heat damage to the cylinder assembly at the rotating arm, thereby causing the discharge door to fail and system failure. Utility Model Content

[0009] In order to solve the deficiencies of the above-mentioned technology, the utility model provides an emergency emission chimney structure of a secondary combustion chamber of a solid waste treatment device.

[0010] The technical solution of the utility model is as follows: an emergency discharge chimney structure of a secondary combustion chamber of a solid waste treatment device, comprising a discharge cylinder, a discharge door, a rotating arm assembly, a driving mechanism, and an emergency discharge chimney cylinder, one end of the discharge cylinder is connected with the secondary combustion chamber to guide smoke exhaust, and the other end is provided with a smoke outlet, the rotating arm assembly is hingedly connected to the discharge cylinder, the discharge door is adapted to be sealed and connected with the smoke outlet, and is fixedly connected to the rotating arm assembly, the driving mechanism is linked with the rotating arm assembly, and drives the rotating arm assembly to flip around the hinge to drive the discharge door to open and close relative to the smoke outlet;

[0011] The emergency discharge chimney cylinder cover is arranged on the radial outer side of the discharge cylinder, and the emergency discharge chimney cylinder is provided with an exhaust port with a vertical height higher than the smoke outlet, and an air inlet with a vertical height lower than the smoke outlet.

[0012] By adopting the above technical scheme, when the discharge door is opened, the high-temperature flue gas of 1100℃ in the second combustion chamber is released instantly. Due to the density difference caused by the temperature difference, the high-temperature flue gas will rise and be discharged in the direction of the discharge outlet with a vertical height higher than the smoke outlet. At the same time, a low-pressure area will be formed at the bottom of the emergency discharge chimney body. At the air inlet of the chimney body with a vertical height lower than the smoke outlet (that is, the empty structure at the bottom), normal temperature air will be quickly sucked into the low-pressure area from the air inlet. In the process of continuous discharge of high-temperature flue gas, a large amount of air with a vertical height lower than the smoke outlet will be continuously sucked into the chimney body and mixed with the high-temperature flue gas. The temperature of the mixed flue gas drops rapidly and is within the temperature resistance range of the chimney material, thereby realizing the function of sending the high-temperature flue gas to a high place for discharge without refractory materials inside the chimney.

[0013] And because the exhaust port, smoke outlet and air inlet are arranged at a certain height, smoke will not overflow from the air inlet.

[0014] Chimney effect: refers to a natural convection phenomenon formed by the rise of hot air and the fall of cold air in vertical space, which can lead to enhanced convection of air inside buildings. In buildings with vertical passages (such as chimneys, ventilation shafts, stairwells, etc.), due to the density difference caused by the temperature difference, hot air rises and is discharged through the top, while a low-pressure area is formed at the bottom, attracting fresh air to replenish, thus forming air flow.

[0015] A further configuration of the utility model is that a support seat is provided at the air inlet of the emergency exhaust chimney body.

[0016] The utility model is further configured as follows: the swivel arm assembly includes a swivel arm, a counterweight block, and a bearing; the swivel arm includes a counterweight arm portion, a fixed arm portion, and a hinged arm portion located therebetween; the fixed arm portion is fixedly connected to the discharge door; the end of the counterweight arm portion is detachably fixedly connected to the counterweight block; the middle section of the counterweight arm portion is hingedly connected to the driving mechanism; a hinged seat is provided on the outer peripheral surface of the discharge cylinder, the hinged seat is hingedly connected to the hinged arm portion, and a bearing is provided.

[0017] The utility model is further configured as follows: the driving mechanism includes a driving cylinder, a cylinder support seat, and a connecting piece, the cylinder support seat is fixedly arranged on the outer peripheral surface of the emergency exhaust chimney body, the driving cylinder is fixedly connected to the cylinder support seat, the piston rod of the driving cylinder extends toward one side of the counterweight arm, and a connecting piece is arranged at the end, and the connecting piece is hingedly connected to the middle section of the counterweight arm;

[0018] The emergency discharge chimney cylinder is provided with a movable opening corresponding to the turning path of the rotating arm, and a quick-opening sealing door is provided at the movable opening.

[0019] The utility model is further configured as follows: a stopper for contacting the discharge door is provided on a side of the inner wall surface of the emergency discharge chimney body adjacent to the discharge door flipping path.

[0020] The utility model is further configured as follows: a high temperature resistant stainless steel baffle is provided on the inner wall surface of the emergency discharge chimney cylinder, close to the side where the gap first appears when the discharge door is flipped open.

[0021] A further configuration of the utility model is that the emergency exhaust chimney body is provided with an inspection opening whose vertical height is lower than the smoke outlet, and the inspection opening is provided with a closed door.

[0022] By adopting the above technical scheme, the barrel of the emergency discharge chimney of Part 1 is connected to the steel structure platform through the support seat of Part 14; the discharge door of Part 11 is welded to the swing arm assembly of Part 6 as an integral whole; the swing arm assembly of Part 6 is hingedly connected to the barrel of the discharge door of Part 12 through the bearing of Part 9; the cylinder of Part 4 is fixed to the outer wall of the barrel of the emergency discharge chimney of Part 1 through the cylinder support seat of Part 3; the connecting piece of Part 5 connects the cylinder of Part 3 with the swing arm assembly of Part 6; the limiting piece of Part 2 is welded to the inner side of the barrel of the emergency discharge chimney of Part 1; and Part 8 is installed on the outer wall of the barrel of the emergency discharge chimney of Part 1 through a quick clamp.

[0023] When the discharge door opening condition is met, the cylinder of part 4 is in an extended state, and the cylinder thrust is transmitted to the arm assembly of part 6 through the connecting part of part 5. According to the lever principle, the discharge door of part 11 is driven to rotate around the rotating shaft. As the discharge door is opened, the high-temperature flue gas in the second combustion chamber will be discharged instantly. Since the bottom of the emergency discharge chimney of part 1 is vacantly installed through the support seat of part 14, while the high-temperature flue gas is discharged upward, the normal-temperature air at the bottom will be quickly sucked into the emergency discharge chimney under the chimney effect, and mixed with the high-temperature flue gas just discharged, thereby quickly reducing the temperature of the flue gas in the chimney, so that the chimney body can still be used normally without lining refractory materials. At the same time, a quick-opening sealing door of part 8 is added at the chimney opening within the range of the arm movement to prevent the high-temperature flue gas from escaping from the opening of the arm. In addition, a layer of high-temperature resistant stainless steel baffle (part 10) is added to the inner wall of the chimney facing the direction of the discharge door opening to prevent the impact of high-temperature flue gas on the inner tube of the chimney when the discharge door is opened.

[0024] The beneficial effects of the utility model are as follows: the bottom of the emergency emission chimney is designed with a vacant structure, and the chimney effect is utilized to reduce the smoke temperature in the chimney, so that the chimney can meet the functional requirements of the secondary combustion chamber emergency emission device without the need for a refractory lining, which greatly reduces the weight of the chimney, thereby reducing the design load of the steel structure on the top of the secondary combustion chamber, improving the seismic performance and overall stability of the equipment, and reducing material costs and construction costs by optimizing the design of this chimney.

[0025] 2. A quick-opening sealing door is added to the opening position of the rotating arm of the outer cylinder of the emergency discharge chimney. The sealing door is detachable, which is convenient for later maintenance. At the same time, a rotating space for the rotating arm is reserved on the door panel so as not to interfere with the normal use of the rotating parts. After the sealing door is installed, the overall sealing performance of the chimney is improved, and the cylinder and supporting electronic components are isolated on the outside of the chimney to avoid large-scale escape of high-temperature flue gas from the opening of the rotating arm when releasing, thereby solving the problems of short service life of cylinders of traditional structures and failure of electronic components due to heat.

[0026] 3. A layer of high-temperature resistant stainless steel baffle is added to the inner wall of the emergency discharge chimney, which is facing the opening direction of the discharge door to avoid the direct impact of high-temperature flue gas on the inner tube of the chimney when the discharge door is opened. A small-area enhanced protection structure is designed specifically. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a simplified structural diagram of an embodiment of the utility model;

[0028] Figure 2 The structure of the embodiment of the utility model Figure 1 ;

[0029] Figure 3 The structure of the embodiment of the utility model Figure 2 ;

[0030] The numbers in the accompanying drawings are: 1-emergency discharge chimney body, 2-limiting part, 3-cylinder support seat, 4-cylinder, 5-connecting part, 6-rotating arm assembly, 7-counterweight, 8-quick-opening sealing door, 9-bearing, 10. Baffle, 11. Discharge door, 12-discharge door body, 13-inspection port, 14-support seat.

[0031] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0032] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0033] The following is a detailed description of the utility model inlet line in conjunction with the accompanying drawings. Figure 1-3As shown, an emergency discharge chimney structure of a secondary combustion chamber of a solid waste treatment device comprises a discharge cylinder 12, a discharge door 11, a rotating arm assembly 6, a driving mechanism, and an emergency discharge chimney cylinder 1, wherein one end of the discharge cylinder 12 is connected to the secondary combustion chamber to guide smoke exhaust, and the other end is provided with a smoke outlet 121, the rotating arm assembly 6 is hingedly connected to the discharge cylinder 12, the discharge door 11 is adapted to be sealed and connected with the smoke outlet 121, and is fixedly connected to the rotating arm assembly 6, the driving mechanism is linked with the rotating arm assembly 6, and drives the rotating arm assembly 6 to flip around the hinge to drive the discharge door 11 to open and close relative to the smoke outlet 121;

[0034] The emergency exhaust chimney body 1 is covered on the radially outer side of the exhaust cylinder 12 , and is provided with an exhaust port 1a whose vertical height is higher than the smoke outlet 121 , and an air inlet 1b whose vertical height is lower than the smoke outlet 121 .

[0035] When the discharge door 11 is opened, the high-temperature flue gas of 1100℃ in the second combustion chamber is released instantly. Due to the density difference caused by the temperature difference, the high-temperature flue gas will rise and be discharged toward the discharge port 1a whose vertical height is higher than the smoke outlet 121. At the same time, a low-pressure area will be formed at the bottom of the emergency discharge chimney body 1. At the air inlet 1b (i.e. the empty structure at the bottom) whose vertical height of the chimney body is lower than the smoke outlet 121, normal temperature air will be quickly sucked into the low-pressure area from the air inlet 1b. In the process of continuous discharge of high-temperature flue gas, a large amount of air with a vertical height lower than the smoke outlet 121 will be continuously sucked into the inside of the chimney body and mixed with the high-temperature flue gas. The temperature of the mixed flue gas drops rapidly and is within the temperature resistance range of the chimney material, thereby realizing the function of sending the high-temperature flue gas to a high place for discharge in the absence of refractory materials inside the chimney.

[0036] Furthermore, due to the height settings of the exhaust port 1a, the smoke outlet 121, and the air inlet 1b, smoke will not overflow from the air inlet 1b.

[0037] Chimney effect: refers to a natural convection phenomenon formed by the rise of hot air and the fall of cold air in vertical space, which can lead to enhanced convection of air inside buildings. In buildings with vertical passages (such as chimneys, ventilation shafts, stairwells, etc.), due to the density difference caused by the temperature difference, hot air rises and is discharged through the top, while a low-pressure area is formed at the bottom, attracting fresh air to replenish, thus forming air flow.

[0038] A support seat 14 is provided at the air inlet 1b of the emergency exhaust chimney body 1.

[0039] The rotating arm assembly 6 includes a rotating arm, a counterweight block 7, and a bearing 9. The rotating arm includes a counterweight arm portion, a fixed arm portion, and a hinged arm portion located therebetween. The fixed arm portion is fixedly connected to the discharge door 11. The end of the counterweight arm portion is detachably fixedly connected to the counterweight block 7. The middle section of the counterweight arm portion is hingedly connected to the driving mechanism.

[0040] The outer peripheral surface of the discharge cylinder 12 is provided with a hinge seat, which is hinge-connected to the hinge arm and is provided with a bearing 9.

[0041] The driving mechanism includes a driving cylinder 4, a cylinder support seat 3, and a connecting piece 5. The cylinder support seat 3 is fixedly arranged on the outer peripheral surface of the emergency exhaust chimney body 1. The driving cylinder 4 is fixedly connected to the cylinder support seat 3. The piston rod of the driving cylinder 4 extends toward one side of the counterweight arm, and the end is provided with a connecting piece 5. The connecting piece 5 is hingedly connected to the middle section of the counterweight arm.

[0042] The emergency exhaust chimney body 1 is provided with a movable opening corresponding to the turning path of the rotating arm, and a quick-opening sealing door 8 is provided at the movable opening.

[0043] On the inner wall surface of the emergency discharge chimney body 1, a side adjacent to the turning path of the discharge door 11 is provided with a stopper 2 that abuts against the discharge door 11.

[0044] A high temperature resistant stainless steel baffle 10 is provided on the inner wall surface of the emergency discharge chimney body 1, close to the side where a gap first appears when the discharge door 11 is flipped open.

[0045] The emergency exhaust chimney body 1 is provided with an inspection opening 13 whose vertical height is lower than the smoke outlet 121, and the inspection opening is provided with a closed door.

[0046] The emergency emission chimney is designed with a hollow structure at the bottom. By utilizing the chimney effect, the chimney can meet the functional requirements of the secondary combustion chamber emergency emission device without the need for a refractory lining, which greatly reduces the weight of the chimney and the design load of the steel structure on the top of the secondary combustion chamber, improves the seismic performance and overall stability of the equipment, and reduces material and construction costs by optimizing the design of the chimney.

[0047] 2. A quick-opening sealing door 8 is added to the opening position of the rotating arm of the outer cylinder of the emergency discharge chimney. The sealing door is detachable to facilitate later maintenance. At the same time, a rotating space for the rotating arm is reserved on the door panel so as not to interfere with the normal use of the rotating parts. After the sealing door is installed, the overall sealing performance of the chimney is improved, and the cylinder 4 and the supporting electronic components are isolated on the outside of the chimney to avoid the situation where a large amount of high-temperature smoke escapes from the opening of the rotating arm when the smoke is released, thereby solving the problems of short service life of the cylinder 4 of the traditional structure and failure of electronic components due to heat.

[0048] 3. A layer of high temperature resistant stainless steel baffle 10 is added to the inner wall of the emergency discharge chimney, and the baffle is directly facing the opening direction of the discharge door 11, so as to avoid the direct impact of high temperature flue gas on the inner tube of the chimney when the discharge door 11 is opened.

[0049] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. An emergency exhaust chimney structure of a secondary combustion chamber of a solid waste treatment device, characterized in that: It includes a discharge cylinder, a discharge door, a rotating arm assembly, a driving mechanism, and an emergency discharge chimney cylinder. One end of the discharge cylinder is connected to the second combustion chamber to guide the exhaust of smoke, and the other end is provided with a smoke outlet. The rotating arm assembly is hingedly connected to the discharge cylinder, the discharge door is adapted to be sealed and connected with the smoke outlet, and is fixedly connected to the rotating arm assembly. The driving mechanism is linked with the rotating arm assembly to drive the rotating arm assembly to flip around the hinge to drive the discharge door to open and close relative to the smoke outlet. The emergency discharge chimney cylinder cover is arranged on the radial outer side of the discharge cylinder, and the emergency discharge chimney cylinder is provided with an exhaust port with a vertical height higher than the smoke outlet, and an air inlet with a vertical height lower than the smoke outlet.

2. The emergency exhaust chimney structure of the secondary combustion chamber of a solid waste treatment device according to claim 1, characterized in that: A support seat is arranged at the air inlet of the emergency exhaust chimney body.

3. The emergency exhaust chimney structure of the secondary combustion chamber of a solid waste treatment device according to claim 1 or 2, characterized in that: The rotating arm assembly includes a rotating arm, a counterweight block, and a bearing. The rotating arm includes a counterweight arm portion, a fixed arm portion, and a hinged arm portion located therebetween. The fixed arm portion is fixedly connected to the discharge door, the end of the counterweight arm portion is detachably fixedly connected to the counterweight block, and the middle section of the counterweight arm portion is hingedly connected to the driving mechanism. The outer peripheral surface of the discharge cylinder is provided with an articulated seat, which is hingedly connected to the articulated arm and is provided with a bearing.

4. The emergency exhaust chimney structure of the secondary combustion chamber of a solid waste treatment device according to claim 3 is characterized by: The driving mechanism includes a driving cylinder, a cylinder support seat, and a connecting piece. The cylinder support seat is fixedly arranged on the outer peripheral surface of the emergency exhaust chimney body. The driving cylinder is fixedly connected to the cylinder support seat. The piston rod of the driving cylinder extends toward one side of the counterweight arm and is provided with a connecting piece at the end. The connecting piece is hingedly connected to the middle section of the counterweight arm. The emergency discharge chimney cylinder is provided with a movable opening corresponding to the turning path of the rotating arm, and a quick-opening sealing door is provided at the movable opening.

5. The emergency exhaust chimney structure of the secondary combustion chamber of a solid waste treatment device according to claim 4, characterized in that: A stopper that abuts against the discharge door is provided on the inner wall surface of the emergency discharge chimney body at one side adjacent to the discharge door flipping path.

6. The emergency exhaust chimney structure of the secondary combustion chamber of a solid waste treatment device according to claim 1 or 2, characterized in that: A high temperature resistant stainless steel baffle is provided on the inner wall surface of the emergency discharge chimney cylinder, close to the side where a gap first appears when the discharge door is flipped open.

7. The emergency exhaust chimney structure of the secondary combustion chamber of a solid waste treatment device according to claim 1 or 2, characterized in that: The emergency exhaust chimney body is provided with an inspection opening whose vertical height is lower than the smoke outlet, and the inspection opening is provided with a closed door.

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