Solid electric heat storage steam boiler

Abstract

The utility model discloses a solid electric heat storage steam boiler which comprises a boiler shell, the interior of the boiler shell is divided into a lower layer part and an upper layer part through a steel plate, the two ends of the lower layer part and the two ends of the upper layer part are communicated to form a circulation loop, heating parts are arranged in the lower layer part and the upper layer part respectively, and fluid circulates in the circulation loop to alternately flow in the lower layer part and the upper layer part. A ceramic heat accumulator is arranged in the heating part, fluid penetrates through the ceramic heat accumulator to be heated, and the two ends of the lower layer part and the two ends of the upper layer part are communicated to form an external heating part. According to the solid electric heat storage steam boiler, green electricity or off-peak electricity is used for solid heat storage, and the solid electric heat storage steam boiler is environment-friendly, energy-saving and low in cost; the performance is improved, the two working procedures of the preheater and the superheater provide higher heat for generating superheated steam with higher parameters and stability; the ceramic material is selected as the main material of the heat accumulator because the ceramic material has high heat capacity, high heat conductivity and good thermal shock resistance. Due to the characteristic, the ceramic heat accumulator has higher efficiency when absorbing and releasing heat energy.

Description

Technical Field

[0001] The utility model relates to the technical field of heat storage boilers, in particular to a solid electric heat storage steam boiler. Background Art

[0002] The development of solid heat storage boilers is based on energy conservation and environmental protection considerations. With the rapid growth of power installed capacity and power generation, the peak-to-valley difference of the power grid is also widening, which directly affects the safe and economical operation of the power grid. As a device that can store heat energy during the off-peak period of the power grid and release it during the peak period, the solid heat storage boiler helps to increase the off-peak power consumption of the power grid and make the power grid load tend to be balanced, thereby improving the operating efficiency of the generator set and reducing energy waste.

[0003] First, the existing solid thermal storage boilers use magnesium bricks, which have relatively poor thermal conductivity, which results in low heat transfer efficiency during steam production and takes longer to reach the required steam temperature and pressure. This not only affects the steam production rate, but may also increase energy consumption and operating costs.

[0004] Secondly, when magnesium brick boilers are running for a long time or are frequently started and stopped, magnesium bricks may be damaged or cracked. This is mainly because the thermal expansion coefficient of magnesium bricks is different from that of metal parts, which easily generates stress concentration during temperature changes, leading to structural damage. Once magnesium bricks are damaged, it will directly affect the sealing and thermal efficiency of the boiler, and may even cause steam leakage and safety accidents.

[0005] In addition, there may be water quality problems when magnesia brick boilers produce steam. Since magnesia bricks themselves have certain chemical activity, they may react with impurities in the water to produce sediment or corrosion. This may not only affect the purity and quality of the steam, but also damage the pipes and components inside the boiler, shortening the service life of the equipment.

[0006] In addition, during actual operation, considering the insulation problem, the maximum temperature resistance of magnesium bricks is generally around 650°C, and the stored heat is too little compared to ceramics, resulting in the inability to produce high-parameter steam.

[0007] In summary, magnesia brick boilers have defects in steam production, such as poor thermal conductivity, easy breakage, and water quality problems. These defects may lead to slow steam production, high energy consumption, increased operating costs, and increased safety risks.

[0008] In view of the above, it is necessary to propose a solid electric thermal storage steam boiler to solve the above problems. Utility Model Content

[0009] The purpose of the utility model is to solve the above technical problems and to provide a solid electric heat storage steam boiler.

[0010] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a solid electric heat storage steam boiler, including a boiler shell, the boiler shell is divided into a lower layer and an upper layer by a steel plate, the two ends of the lower layer and the upper layer are connected to form a circulation loop, and a heating part is provided in the lower layer and the upper layer. The fluid circulates in the circulation loop to form alternating flow in the lower layer and the upper layer. A ceramic heat storage body is provided in the heating part, and the fluid passes through the ceramic heat storage body for heating. The two ends of the lower layer and the upper layer are connected to form an external heating part.

[0011] Furthermore, the ceramic heat storage body is filled in the lower layer and the upper layer and is provided with a plurality of ventilation holes along the length direction, the plurality of ventilation holes are arranged in a honeycomb shape, and a heating wire is arranged in the ceramic heat storage body.

[0012] Furthermore, at least one end of the heating part is provided with a heat storage body mesh support for supporting and fixing.

[0013] Furthermore, a connecting end is provided with a plurality of through holes on the steel plate body for dividing to form a perforated plate, so that the lower layer is connected with the upper layer, and a baffle for guiding flow is provided between the perforated plate and the heating part of the lower layer.

[0014] Furthermore, the other connecting end is connected with the lower part through an air duct, a fan is arranged at the end of the air duct, and a wind hood is arranged at the fan outlet, and the diameter of the wind hood is connected with the heating part of the lower part.

[0015] Furthermore, the external heating part includes a preheating part and an overheating part, the preheating part is arranged at one end of the air duct, and the overheating part is arranged at one end of the orifice plate.

[0016] Furthermore, a preheater is provided in the preheating section, a superheater is provided in the superheating section, and the heated medium pipeline enters the preheating section and the superheating section in sequence.

[0017] Furthermore, the heated medium pipeline is provided with a water supply flange, a water pump, a steam drum, a user flange, and an interface in sequence.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the utility model is a solid electric heat storage steam boiler that uses green electricity or valley electricity for solid heat storage, which is environmentally friendly, energy-saving and low-cost; the performance is improved, and the two processes of preheater and superheater provide higher heat for producing higher parameter and stable superheated steam; ceramic material is selected as the main material of the heat storage body because it has high heat capacity, high thermal conductivity and good thermal shock resistance. This characteristic makes the ceramic heat storage body more efficient in absorbing and releasing heat energy, and can resist frequent temperature changes, ensuring the stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a structural schematic diagram of a solid electric heat storage steam boiler of the utility model;

[0020] Figure 2 is a specific structural diagram of the ceramic heat storage body;

[0021] In the figure: 1. heating wire; 2. ceramic heat storage body; 3. insulation brick; 4. baffle; 5. orifice plate; 6. superheater; 7. steam drum; 8. preheater; 9. user flange; 10. for interface; 11. water supply flange; 12. water pump; 13. wind cover; 14. fan; 15. steel plate; 16. mesh support of heat storage body; 17. air duct; 19. ventilation hole; 18. lower part; 21. upper part. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] A solid electric heat storage steam boiler, such as Figure 1-2 As shown, the boiler shell includes a boiler shell, which is divided into a lower layer 18 and an upper layer 21 by a steel plate 15. A heating part is provided in each of the lower layer 18 and the upper layer 21. A ceramic heat storage body 2 is provided in the heating part. The ceramic heat storage body 2 is filled in the lower layer 18 and the upper layer 21 and is provided with a plurality of ventilation holes 19 along the length direction. The plurality of ventilation holes 19 are arranged in a honeycomb shape. A heating wire 1 is arranged in the ceramic heat storage body 2, as shown in FIG. Figure 2 The figure shows the specific structure of the ceramic heat storage body. The heating wire is placed in the middle of the ceramic heat storage body, horizontally, and the direction of the heating wire can also be perpendicular to the wind direction. The technical solution also takes into account the requirements of safety and economy. By setting multiple safety protection measures, such as overheating protection and overpressure protection, the safety of the boiler during operation is ensured. In order to prevent the upper heat storage body from heating the lower heat storage body, the upper and lower layers are blocked by insulating bricks 3. The heat storage body mesh support 16 plays the role of fixing the heat storage body and ventilating, and is welded to the bottom of the boiler; the heating wire 1 is energized, and the ceramic heat storage body 2 can be heated by the heating wire 1. The heat storage body mesh support 16 and the orifice plate 5 both play a fixing role and a baffle 4 role. The aperture can be adjusted as needed to prevent the hot air from being too concentrated.

[0024] Ceramic thermal storage body 2, also known as thermal storage ceramic, is a material with special functions made by new ceramic technology. Ceramic thermal storage body 2, as the name implies, is a device that uses the characteristics of ceramic materials to accumulate and release heat. Ceramic thermal storage body 2 has a high thermal conductivity, which means it can absorb and release heat quickly. Stability and corrosion resistance: The chemical properties are stable and corrosion-resistant, which enables it to maintain stable performance under various environmental conditions. High temperature performance: It has good thermal storage performance and excellent high temperature performance, can work at extreme temperatures, and is suitable for high temperature industrial applications.

[0025] The lower portion 18 and the upper portion 21 are connected at both ends to form a circulation loop. Figure 1 As shown, the boiler shell is divided into a lower layer 18 and an upper layer 21 by a steel plate 15, and the two ends are connected to form a loop. The heat storage body is divided into an upper and lower layer, but they do not interfere with each other. The hot air that completes the heat exchange with the superheater 6 can be preheated by water again in the preheater 8, thereby improving the heat utilization efficiency while reducing the wind temperature, and protecting the fan 14 from being damaged by high temperature; specifically, one connecting end is provided with a plurality of through holes on the main body of the steel plate 15 used for division to form an orifice plate 5, so that the lower layer 18 is connected with the upper layer 21, and a baffle 4 for guiding flow is provided between the orifice plate 5 and the heating part of the lower layer 18, and the other connecting end is connected with the lower layer 18 through an air duct 17, and a fan 14 is arranged at the end of the air duct 17, and a wind hood 13 is provided at the outlet of the fan 14, and the diameter of the wind hood 13 is connected with the heating part of the lower layer 18.

[0026] The fan 14 is started, and the cold air passes through the wind hood 13, blowing out the heat stored in the lower heat storage body into hot air, and passes through the baffle plate 4 and the orifice plate 5. The orifice plate 5 is formed on the steel plate 15. The orifice plate 5 and the steel plate 15 both play a supporting role. The orifice plate 5 is distributed with holes corresponding to the inner diameter of the baffle plate 4, so that the baffle plate 4 guides the hot air flow into the orifice plate 5 in the corresponding area, and then enters the upper part 21. It can be understood that an external heating part is arranged above the orifice plate 5 to form heat exchange with the external medium.

[0027] The circulating fluid is heated after passing through the upper part 21 and then flows back to the inlet of the fan 14 through the air duct 17, thus forming a cycle. The fluid circulates in the circulation loop to form alternating flows in the lower part 18 and the upper part 21. The fluid passes through the ceramic heat storage body 2 for heating. Similarly, an external heating part can be set in the connecting end of the air duct 17, so that two external heating parts are formed at the connecting ends of the lower part 18 and the upper part 21 to supply heat.

[0028] Specifically, the external heating part includes a preheating part and a superheating part, the preheating part is arranged at one end of the air duct 17, and the superheating part is arranged at one end of the orifice plate 5. The preheating part is provided with a preheater 8, the superheating part is provided with a superheater 6, and the heated medium pipeline enters the preheating part and the superheating part in sequence. The heated medium pipeline is provided with a water supply flange 11, a water pump 12, a steam drum 7, a user flange 9, and a user interface 10 in sequence. In actual use, the water supply passes through the water supply flange 11 and is driven by the water pump 12 to enter the preheater 8, where it exchanges heat with the hot air to generate steam, and the steam enters the steam drum 7; the cold air enters the upper heat storage body, is heated again, and exchanges heat with the steam coming out of the steam drum 7 again in the superheater 6, producing superheated steam, which enters the user interface 10 through the user flange 9; the cold air of the secondary heat exchange enters the fan 14 again through the air duct 17 for recycling. The preheater 8 and the superheater 6 heat the feed water in turn, which can ensure the stability of steam output.

[0029] First of all, ceramic thermal storage boiler technology significantly improves the efficiency of heat energy transfer. By optimizing the heat conduction path and the selection of thermal storage materials, ceramic thermal storage boilers can reach the required steam temperature and pressure in a shorter time, thereby increasing the speed and efficiency of steam production.

[0030] Secondly, ceramic thermal storage boiler technology enhances the performance stability of the boiler. With advanced thermal stress analysis and structural design, ceramic thermal storage boilers can better cope with thermal cycles and temperature changes, reduce the cracking or breakage of magnesium bricks due to differences in thermal expansion coefficients, and ensure the long-term stable operation of the boiler.

[0031] In addition, ceramic thermal storage boiler technology also effectively solves the water quality problem. By adopting advanced water treatment technology and anti-corrosion measures, the jacket thermal storage boiler can reduce the risk of scale formation and internal corrosion, improve the quality and purity of steam, and extend the service life of the boiler.

[0032] In general, ceramic thermal storage boiler technology effectively makes up for the shortcomings of magnesium brick boilers in steam production by improving heat transfer efficiency, enhancing performance stability and solving water quality problems, and provides strong support for the application of solid thermal storage boilers in a wider range of fields. When choosing a solid thermal storage boiler, users can consider ceramic thermal storage boiler technology to obtain better use effects and economic benefits.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solid electric thermal storage steam boiler, comprising a boiler shell, characterized in that: The boiler shell is divided into a lower layer (20) and an upper layer (21) by a steel plate (15). The lower layer (20) and the upper layer (21) are connected at both ends to form a circulation loop. A heating portion is provided in both the lower layer (20) and the upper layer (21). The fluid circulates in the circulation loop to form an alternating flow in the lower layer (20) and the upper layer (21). A ceramic heat storage body (2) is provided in the heating portion. The fluid passes through the ceramic heat storage body (2) to be heated. The lower layer (20) and the upper layer (21) are connected at both ends to form an external heating portion.

2. A solid electric thermal storage steam boiler according to claim 1, characterized in that: The ceramic heat storage body (2) is filled in the lower layer (20) and the upper layer (21) and is provided with a plurality of ventilation holes (19) along the length direction. The plurality of ventilation holes (19) are arranged in a honeycomb shape. A heating wire (1) is arranged in the ceramic heat storage body (2).

3. A solid electric thermal storage steam boiler according to claim 2, characterized in that: At least one end of the heating portion is provided with a heat storage body mesh support (16) for supporting and fixing.

4. The solid electric thermal storage steam boiler according to claim 1, characterized in that: A plurality of through holes are formed on a main body of a steel plate (15) for dividing at one connecting end to form a perforated plate (5), so that the lower layer (20) is connected to the upper layer (21), and a baffle plate (4) for guiding flow is provided between the perforated plate (5) and the heating portion of the lower layer (20).

5. A solid electric thermal storage steam boiler according to claim 4, characterized in that: The other connecting end is connected to the lower portion (20) via an air duct (17). A fan (14) is provided at the end of the air duct (17). An air hood (13) is provided at the outlet of the fan (14). The opening of the air hood (13) is connected to the heating portion of the lower portion (20).

6. A solid electric thermal storage steam boiler according to claim 5, characterized in that: The external heating part comprises a preheating part and an overheating part, the preheating part is arranged at one end of the air duct (17), and the overheating part is arranged at one end of the orifice plate (5).

7. A solid electric thermal storage steam boiler according to claim 6, characterized in that: A preheater (8) is provided in the preheating section, a superheater (6) is provided in the superheating section, and a pipeline for the heated medium enters the preheating section and the superheating section in sequence.

8. The solid electric thermal storage steam boiler according to claim 7, characterized in that: The heated medium pipeline is provided with a water supply flange (11), a water pump (12), a steam drum (7), a user flange (9), and a user interface (10) in sequence.

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