A waste heat recovery steam furnace capable of preparing glass microbeads

Abstract

The utility model discloses a kind of waste heat recovery steam furnace that can prepare glass bead, belong to glass bead production and waste heat recovery technical field.The device includes combustion chamber, and water jacket of integral forming is sleeved outside combustion chamber, and inner wall is continuous circular and has no splicing welding joint, and combustion chamber lower part is equipped with waste heat flue gas entrance, and upper end coaxially connects diffusion chamber;Diffusion chamber is double-layer structure of inner layer and outer layer, and the inner layer top is equipped with the hot air flow guide ring that guide hot air downward circulation, and outer layer inner side wall is laid with membrane type water cooling wall and is equipped with smoke exhaust passage in lower end.It is guaranteed that the utility model can stabilize airflow, improve glass bead softening uniformity and product quality, increase heat exchange area simultaneously, reduce flue gas temperature, significantly improve waste heat recovery efficiency, realize energy-saving effect.

Description

Technical Field

[0001] This utility model belongs to the field of glass microsphere production and waste heat recovery technology, specifically relating to a waste heat recovery steam furnace that can produce glass microspheres. Background Technology

[0002] Glass microspheres are a new type of material with wide applications and unique properties that has emerged in recent years. This product can be made from waste glass raw materials through high-tech processing, with a particle size of 10-250 micrometers and a wall thickness of 1-2 micrometers. It possesses advantages such as light weight, low thermal conductivity, high strength, and good chemical stability. Currently, the production of glass microspheres often requires a boiler to provide a high-temperature environment to soften and shape the raw materials. Furthermore, if the waste heat generated by the boiler is not recovered, it results in a significant waste of energy.

[0003] In the prior art, such as the utility model patent with authorization announcement number CN207418577U, a waste heat recovery boiler for the production of glass microspheres is disclosed, which includes a combustion production chamber, a combustion diffusion chamber, and a steam-water circulation system, attempting to achieve energy saving through waste heat recovery. However, this prior art has the following shortcomings:

[0004] 1. The furnace walls of the combustion production chamber are mostly constructed by welding steel plates into square tubes and then splicing them into a cylindrical structure. The weld joints at these joints result in unevenness in the inner wall of the combustion chamber. During the combustion of raw materials and the flow of air, these weld joints can easily cause airflow disturbance and uneven distribution. This not only affects the softening uniformity of the glass microsphere raw materials but may also lead to inconsistent particle size of the formed glass microspheres, reducing product quality and yield.

[0005] 2. The combustion diffusion chamber adopts a traditional top-central exhaust design, with high-temperature hot air being directly discharged from the top of the diffusion chamber. It can only contact one side of the membrane water-cooled wall outside the diffusion chamber, resulting in insufficient heat exchange, which leads to high exhaust gas temperature (usually above 200℃), low waste heat recovery efficiency, and inability to fully utilize the energy of high-temperature hot air.

[0006] Therefore, there is an urgent need for a waste heat recovery steam furnace that can effectively solve the above problems and produce glass microspheres. Utility Model Content

[0007] The purpose of this invention is to provide a waste heat recovery steam furnace that can prepare glass microspheres, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A dust-free mixing device for producing glass microspheres includes a combustion chamber. A circumferential water jacket is fixedly fitted around the outer side of the combustion chamber. The inner wall of the water jacket has a continuous circular regular structure. The lower part of the combustion chamber is connected to a waste heat flue gas inlet via a gas pipe. The upper end of the combustion chamber is connected to a diffusion chamber via a gas pipe. A steam-water circulation system is fixed at the upper end of the diffusion chamber. The steam-water circulation system is connected to the water jacket via a water pipe. The outer side of the diffusion chamber is connected to a flue gas exhaust channel.

[0010] Preferably, the inner wall of the water jacket is manufactured using a seamless welding process.

[0011] Preferably, the diffusion chamber includes an inner diffusion chamber and an outer diffusion chamber, and the two diffusion chambers are closed and isolated. The top of the inner diffusion chamber is provided with a hot air guide ring to guide the hot air to circulate downward from the top of the inner diffusion chamber. The inner sidewall of the outer diffusion chamber is covered with a membrane water-cooled wall, and the smoke exhaust channel is opened at the lower end of the outer diffusion chamber.

[0012] Preferably, the steam-water circulation system includes an upper boiler drum connected to the upper end of the membrane water-cooled wall via a water pipe. The upper boiler drum is connected to a top water collection tank fixed below the upper boiler drum via a steam-water outlet pipe system. The upper boiler drum is connected to a downcomer pipe, and the other end of the downcomer pipe is connected to the water collection tank at the lower end of the water jacket and the water collection tank at the lower end of the membrane water-cooled wall, respectively. Water level gauges are fixed on both sides of the upper boiler drum.

[0013] Preferably, the hot air guide ring is an annular plate structure, the inner ring of the hot air guide ring is inclined downward and the outer ring is fixedly connected to the top inner wall of the inner diffusion chamber, and a plurality of guide holes are uniformly provided on the hot air guide ring.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Stable airflow and high product quality: The combustion chamber adopts a regular circular inner wall design without welding joints, combined with an integrally formed water jacket, which avoids airflow disturbance caused by welding joints, making the raw materials burn more completely and soften more evenly, thus comprehensively improving the consistency of glass microsphere particle size and product qualification rate.

[0016] 2. High thermal efficiency and significant energy saving: The double-layer diffusion chamber achieves hot air circulation from top to bottom through the hot air guide ring, so that the high-temperature hot air can fully contact the inner diffusion chamber side wall and the outer diffusion chamber membrane water-cooled wall at the same time, which effectively increases the heat exchange area, reduces the exhaust temperature, significantly improves the waste heat recovery efficiency, and reduces the energy consumption of glass microsphere production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front sectional view of the present invention.

[0018] Reference numerals: 1. Combustion chamber; 2. Water jacket; 3. Waste heat flue gas inlet; 4. Diffuser chamber; 41. Inner diffuser chamber; 42. Outer diffuser chamber; 43. Hot air guide ring; 44. Membrane water-cooled wall; 5. Steam-water circulation system; 51. Top water collection tank; 52. Steam-water outlet piping system; 53. Upper boiler drum; 54. Downcomer; 55. Water level gauge; 6. Flue gas exhaust pipe. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the terms "inner," "outer," "left," "right," "upper," "middle," and "lower" in the specification and claims of this utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, a waste heat recovery steam furnace capable of preparing glass microspheres includes:

[0023] Combustion chamber 1 has its side walls made of heat-resistant stainless steel rolled as a whole, and its inner wall has a continuous regular circular structure without any splicing or welding joints to avoid airflow disturbance. The lower part of combustion chamber 1 is provided with waste heat flue gas inlet 3.

[0024] The water jacket 2 is a sandwich structure formed by bending a seamless steel pipe as a whole and welding it to the side wall of the combustion chamber 1. The jacket is used to introduce circulating water to achieve cooling of the combustion chamber and absorption of waste heat. The lower end of the water jacket 2 is equipped with a water collection tank. The water collection tank is a mature technology in this field and has been fully disclosed, so it will not be described in detail in the specification.

[0025] The diffusion chamber 4 has a double-layer structure, consisting of an inner diffusion chamber 41 and an outer diffusion chamber 42, both of which are made of heat-resistant stainless steel.

[0026] The inner diffuser chamber 41 has a larger diameter than the combustion chamber and is equipped with a hot air guide ring 43 at the top. The hot air guide ring 43 is an annular plate structure with the inner ring inclined downward and the outer ring welded and fixed to the inner wall of the top of the inner diffuser chamber 41. Several guide holes with a diameter of 10-15mm are evenly opened on the annular plate. After the high-temperature hot air enters the inner diffuser chamber 41 from the combustion chamber, it circulates downward under the guidance of the hot air guide ring 43, prolonging the residence time of the hot air in the diffuser chamber 4.

[0027] The outer diffusion chamber 42 is fitted outside the inner diffusion chamber 41, forming a hot air return channel with a width of 30-50mm between them; the inner wall of the outer diffusion chamber 42 is covered with a membrane water-cooled wall 44, and circulating water is introduced into the membrane water-cooled wall 44, and a water collection tank is provided at its lower end; the lower part of the side wall of the outer diffusion chamber 42 is provided with a smoke exhaust channel 6, which is connected to the lower end of the hot air return channel, and the hot air after circulating heat exchange is discharged from the smoke exhaust channel 6.

[0028] The steam and water circulation system 5 includes a top water collection tank 51, a steam and water outlet pipe system 52, an upper boiler drum 53, a downcomer 54, and a water level gauge 55. These components are mature technologies in the field and have been fully disclosed, so they will not be described in detail in the specification.

[0029] The specific implementation process of this utility model is as follows: During operation, waste heat flue gas is introduced into the combustion chamber 1 to soften the raw materials. Since there are no welded joints on the inner wall of the combustion chamber 1, the airflow is stable and the raw materials are softened uniformly. At the same time, the high-temperature hot air generated by combustion enters the inner diffusion chamber 41 and circulates downward under the guidance of the hot air guide ring 43. It contacts the side wall of the inner diffusion chamber 41 and the membrane water-cooled wall 44 of the outer diffusion chamber 42 in sequence, releasing heat. The circulating water in the water jacket 2 and the membrane water-cooled wall 44 absorbs heat and forms a steam-water mixture. The mixture is then drawn into the upper boiler drum 53 through the steam-water outlet pipe system 52. The steam-water separator in the upper boiler drum 53 separates the steam and water. The steam is output from the main steam pipe seat, while the water flows back to the water jacket 2 and the membrane water-cooled wall 44 through the downcomer 54 to complete the circulation. The hot air after heat exchange is discharged from the exhaust channel 6 and can be further treated by the desulfurization and dust removal device before being discharged.

[0030] It should be understood that the disclosed apparatus can be implemented in other ways, as provided in the several embodiments of this application. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention as appropriate without conflict or creative effort, thereby obtaining different technical solutions that do not depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A waste heat recovery steam furnace capable of preparing glass microspheres, characterized in that: The combustion chamber (1) is provided with a ring-shaped water jacket (2) fixed on the outer side of the combustion chamber (1). The inner wall of the water jacket (2) is a continuous circular regular structure. The lower part of the combustion chamber (1) is connected to the waste heat flue gas inlet (3) through a gas pipe. The upper end of the combustion chamber (1) is connected to the diffuser (4) through a gas pipe. The upper end of the diffuser (4) is fixed with a steam-water circulation system (5). The steam-water circulation system (5) is connected to the water jacket (2) through a water pipe. The outer side of the diffuser (4) is connected to the exhaust channel (6).

2. The waste heat recovery steam furnace for preparing glass microspheres according to claim 1, characterized in that: The inner wall of the water jacket (2) is made by welding without splicing joints.

3. The waste heat recovery steam furnace for preparing glass microspheres according to claim 1, characterized in that: The diffusion chamber (4) includes an inner diffusion chamber (41) and an outer diffusion chamber (42), and the two diffusion chambers are closed and isolated. The top of the inner diffusion chamber (41) is provided with a hot air guide ring (43) to guide hot air to circulate downward from the top of the inner diffusion chamber (41). The inner sidewall of the outer diffusion chamber (42) is covered with a membrane water-cooled wall (44). The smoke exhaust channel (6) is opened at the lower end of the outer diffusion chamber (42).

4. A waste heat recovery steam furnace for preparing glass microspheres according to claim 1, characterized in that: The steam-water circulation system (5) includes an upper boiler drum (53) connected to the upper end of the membrane water-cooled wall (44) via a water pipe. The upper boiler drum (53) is connected to a top water collection tank (51) fixed below the upper boiler drum (53) via a steam-water outlet pipe system (52). The upper boiler drum (53) is connected to a downcomer pipe (54). The other end of the downcomer pipe (54) is connected to the water collection tank at the lower end of the water jacket (2) and the water collection tank at the lower end of the membrane water-cooled wall (44) respectively. Water level gauges (55) are fixed on both sides of the upper boiler drum (53).

5. A waste heat recovery steam furnace for preparing glass microspheres according to claim 3, characterized in that: The steam-water circulation system (5) includes an upper boiler drum (53) connected to the upper end of the membrane water-cooled wall (44) via a water pipe. The upper boiler drum (53) is connected to a top water collection tank (51) fixed below the upper boiler drum (53) via a steam-water outlet pipe system (52). The upper boiler drum (53) is connected to a downcomer pipe (54). The other end of the downcomer pipe (54) is connected to the water collection tank at the lower end of the water jacket (2) and the water collection tank at the lower end of the membrane water-cooled wall (44) respectively. Water level gauges (55) are fixed on both sides of the upper boiler drum (53).

6. A waste heat recovery steam furnace for preparing glass microspheres according to claim 3, characterized in that: The hot air guide ring (43) is an annular plate structure. The inner ring of the hot air guide ring (43) is inclined downward and the outer ring is fixedly connected to the top inner wall of the inner diffusion chamber (41). The hot air guide ring (43) is uniformly provided with a number of guide holes.

7. A waste heat recovery steam furnace for preparing glass microspheres according to claim 5, characterized in that: The hot air guide ring (43) is an annular plate structure. The inner ring of the hot air guide ring (43) is inclined downward and the outer ring is fixedly connected to the top inner wall of the inner diffusion chamber (41). The hot air guide ring (43) is uniformly provided with a number of guide holes.

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