Laying type furnace wall drying device
Through the laying furnace wall drying device, using electric blankets and intelligent temperature control technology, the problems of high energy consumption and uneven temperature in traditional drying methods are solved, and a more efficient and environmentally friendly furnace wall drying process is achieved, reducing the temperature and temperature control technology. Cost and operational risks.
Patent Information
- Application Number
- CN202420159520.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-23
Smart Images
Figure CN222211171U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of furnace wall manufacturing, in particular to a laying type furnace wall drying device. Background Art
[0002] Petrochemical industrial furnace is an important equipment in petrochemical plants. It uses high temperature flame and airflow as heat source to make the oil flowing in the industrial furnace tube reach the specified temperature. With the continuous expansion of large petrochemical enterprises at home and abroad, the demand for large industrial furnaces in petrochemical industry is increasing, and the market prospect is broad.
[0003] Industrial furnaces are generally composed of radiation chambers, convection chambers, waste heat recovery systems, burners and ventilation systems. Large industrial furnaces are generally tall and heavy. In the half-century of domestic development, due to the limitations of process and equipment technology, transportation and management, petrochemical industrial furnaces have always followed the manufacturing model of assembling and welding scattered parts on site. With the large-scale and short construction cycle of domestic petrochemical projects, the traditional overall construction model of petrochemical industrial furnaces has gradually failed to meet the needs of project construction. The use of factory modular manufacturing technology has become a trend. This traditional construction model has been replaced by modular manufacturing in factory workshops and on-site modular assembly technology.
[0004] Large-scale development is the development trend of heavy chemical industry equipment at home and abroad, and economies of scale are an important way to compete in the market. However, high efficiency, energy saving and environmental protection are the future development themes of industrial furnaces. The insulation quality of furnace walls is a problem that currently has obvious differences in the construction of industrial furnaces by different domestic manufacturers.
[0005] For the cast lining of the side wall of the furnace wall, which is pre-dried in the factory and not promptly dried after the cast lining construction is completed, measures should be taken to dry the cast lining to avoid the phenomenon of "hairy" and other alkali-returning phenomena on the lining surface. On the one hand, furnace wall drying can remove moisture from the cast layer, reduce the weight of the module, and make it easier to transport and hoist. On the other hand, it can promote the curing reaction of the cast layer and improve the strength and thermal insulation performance. However, the furnace wall drying needs to master the balance of temperature and speed, otherwise it will cause cracking and the thermal insulation effect of the furnace wall will be counterproductive. The physical process of water evaporation in the cast layer and the chemical process of the strength change of the cast layer itself need to be coordinated. The process of water moving from the cast layer to the outside also requires the unification of mass transfer and heat transfer. These are the common pursuits of efficient production and high-quality products. Therefore, this process has become a necessary quality and technical requirement for most modules.
[0006] The scaled increase in the production capacity of petrochemical industrial furnaces has resulted in ultra-long and ultra-wide modular furnace walls, up to 24 meters long and 3 meters high, with a large furnace cavity space. The traditional method of drying the cast lining is to insulate and seal the upper and lower ends of the furnace wall with insulation cotton to form a closed space, and blow hot air into it through a blower for drying. The disadvantages are that the upper and lower ends are difficult to seal, the cycle is long, the subsequent processes need to wait, the energy consumption is high, the insulation cotton consumption is large, and the total cost is high; and the temperature distribution of the large furnace cavity is uneven, and small cracks beyond the range may occur on the surface of the cast lining; the quality inspection during the operation is inconvenient, and the environmental protection coefficient needs to be improved. There is blower noise during the operation, and the blast easily blows out ceramic fiber dust flying in the factory.
[0007] In summary, with the development trend of energy conservation and environmental protection, it is urgent to develop a cast lining drying technology that reduces energy consumption and improves drying efficiency. Summary of the invention
[0008] In view of the above technical problems in the prior art, the utility model provides a laying type furnace wall drying device.
[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0010] A laying type furnace wall drying device is provided, comprising an electric blanket for laying on the surface of the cast lining of the furnace wall, the electric blanket is provided with a heating unit for heating when powered on, the electric blanket is provided with a plurality of thermocouples for measuring the air flow temperature on the surface of the cast lining and is connected to a control module, and the control module controls the heating power of the heating unit according to the temperature signal fed back by the thermocouple.
[0011] As a further optional solution, there are multiple thermocouples, and the multiple thermocouples are distributed in the electric blanket in a grid format.
[0012] As a further optional solution, a steam dissipation hole is opened in the middle of the electric blanket.
[0013] As a further optional solution, the electric blanket is provided with a high temperature resistant metal soft chain, and the high temperature resistant metal soft chain is provided with a hanging ear.
[0014] As a further option, the electric blanket is provided with guide rollers for movement along the surface of the cast lining.
[0015] As a further optional solution, a heat insulating layer is provided on a side of the electric blanket away from the cast lining.
[0016] As a further optional solution, the electric blanket is a flexible blanket that can be bent and deformed.
[0017] As a further optional solution, there are multiple electric blankets, and the multiple electric blankets are spliced or separated and laid on the surface of the dried cast lining, and the multiple electric blankets generate heat independently of each other.
[0018] As a further optional solution, the electric blanket is a whole block structure, the number of the heating units is multiple, and the multiple heating units generate heat independently of each other.
[0019] As a further alternative, the outline of the electric blanket is circular, oval or polygonal.
[0020] Beneficial effects of the utility model:
[0021] Compared with the prior art, the utility model is a laying type furnace wall drying device. By laying an electric heating blanket on the surface of the cast lining of the furnace wall for drying, the furnace wall drying cycle can be shortened, and subsequent production processes can be carried out simultaneously. It is no longer necessary to heat-insulate and seal the two ends of the module and the upper and lower openings. The two sides of the furnace wall can be divided and ruled. The heating blanket can be laid on the surface of the furnace wall casting layer at the same time or successively. The blanket and the wall "work face to face and closely", leaving aside the irrelevant medium of air, directly reducing air heat consumption, reducing energy consumption, reducing insulation cotton consumption, and reducing costs. In addition, the drying temperature distribution on the large furnace wall is more uniform, and the probability of cracks on the cast lining surface is low. Reducing the number of operators, the operation process is convenient, the labor intensity is reduced, and the safety factor is improved. The blower can be removed to reduce noise and reduce factory dust. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of a laying type furnace wall drying device in the embodiment in use.
[0023] Figure 2 It is a schematic diagram from another perspective of a laying type furnace wall drying device in the embodiment when in use.
[0024] Reference numerals:
[0025] Furnace wall 1, cast lining 2, electric blanket 3, coil 4, high temperature resistant metal soft chain 5, lifting lug 6, guide roller 7, thermal insulation layer 8. DETAILED DESCRIPTION
[0026] The following will be combined with the accompanying drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0027] A laying type furnace wall drying device of this embodiment, such as Figure 1 and Figure 2As shown, it includes an electric blanket 3 for laying on the surface of the cast lining 2 of the furnace wall 1. The electric blanket 3 can fully cover the surface of the entire cast lining 2, or only partially cover it. The electric blanket 3 is provided with a heating unit that generates heat when powered on. The electric blanket 3 is provided with a plurality of thermocouples for measuring the temperature of the air flow on the surface of the cast lining 2. The heating unit and the thermocouple in the electric blanket 3 are connected to a control module together, so that the software engineer can program it and build a computer function module to achieve: the control module controls the heating temperature of the surface of the electric blanket 3 according to the temperature signal fed back by the thermocouple, and the temperature control is more intelligent. It should be noted that the heating unit can purchase an existing electric heating rod, and the thermocouple is an existing temperature measuring element. This embodiment applies these existing elements in the manufacture of the furnace wall of petrochemical equipment, and its basic principles are not elaborated here.
[0028] Figure 1 The middle is a more intuitive illustration of the electric blanket 3, which shows three electric blankets 3. The left one is being installed, the middle one is already installed, and the right one is working. The dotted arrows indicate the rising steam during the drying process. It can be seen that each cast lining 2 can be dried separately, which greatly improves the work efficiency. Similarly, Figure 2 The electric blanket 3 on the left is being installed, and the electric blanket 3 on the right has been installed.
[0029] In this embodiment, a plurality of thermocouples are distributed in a grid pattern on the electric blanket 3, the distance between two adjacent thermocouples is no more than 5m, and the distance between the temperature measuring point of the thermocouple and the surface of the casting lining 2 is no more than 150mm.
[0030] In other embodiments, in the prefabrication step, a steam dissipation hole may be opened in the middle of the electric blanket 3 to facilitate the dissipation of hot air.
[0031] In this embodiment, in the blanket installation step, the furnace wall 1 is pre-erected, the coil 4 is installed between the two erected furnace walls 1, and then the electric blanket 3 is hoisted and laid down from top to bottom along the surface of the cast lining 2. The two sides of the electric blanket 3 are respectively connected with high-temperature resistant metal soft chains 5, the ends of the high-temperature resistant metal soft chains 5 extend upward, and the top is provided with a lifting lug 6, which is convenient for hoisting the entire electric blanket 3 to be laid on the surface of the cast lining 2 or to be pulled out from it. In practice, a connecting rod can be provided at the upper ends of the two high-temperature resistant metal soft chains 5, and the upper ends of the two high-temperature resistant metal soft chains 5 are connected. The connecting rod is actually hoisted under force to improve the stability of the hoisting process and prevent the electric blanket 3 from tilting. In practice, a locking structure can be provided on the electric blanket 3. After being laid in place, the electric blanket 3 is locked with the cast lining 2 / furnace wall 1 to prevent the electric blanket 3 from moving during the heating process. The electric blanket 3 is provided with a guide roller 7 for cooperating with the cast lining 2. When installed, the guide roller 7 rolls and guides along the surface of the cast lining 2 to reduce the sliding friction between the electric blanket 3 and the cast lining 2.
[0032] As an actual optional solution, in the drying step, the electric blanket 3 is divided into regions, and the heating temperature of each region is independently controlled. For example, the number of electric blankets 3 is multiple, which are spliced or separated and laid on the surface of the cast lining 2, and the multiple electric blankets 3 are independently temperature controlled. Alternatively, the electric blanket 3 is a whole structure, and multiple heating units inside are independently controlled to achieve non-uniformity in different regions. Preferably, from bottom to top, the heating temperature at the bottom is higher than the heating temperature at the top. Due to the natural tendency of hot steam to rise, the rising steam will affect the temperature of the air flow above, and energy consumption can be further reduced through targeted temperature control.
[0033] In this embodiment, a heat insulating layer 8 is provided on the side of the electric blanket 3 away from the cast lining 2 to ensure that the heating temperature of the electric blanket 3 is directed toward the cast lining 2, thereby improving the heat utilization efficiency and reducing the temperature of the operating space between the two furnace walls 1 by heat conduction.
[0034] In this embodiment, the electric blanket 3 is a flexible blanket that can be bent and deformed, and can be laid adaptively according to the convex and concave surface of the cast lining 2.
[0035] In this embodiment, the outline of the electric blanket 3 is a rectangle, but it can actually be changed to a circle, an ellipse or a polygon, which is determined according to the shape of the cast lining 2 to be dried, or a combination of different shapes can be used.
[0036] In the description of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.
[0037] Therefore, the above detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the utility model.
[0038] In the description of the present utility model, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
Claims
1. A laying type furnace wall drying device, characterized in that: It includes an electric blanket for laying on the surface of the cast lining of the furnace wall. The electric blanket is provided with a heating unit that generates heat when powered on. The electric blanket is provided with multiple thermocouples for measuring the air flow temperature on the surface of the cast lining and is connected to a control module. The control module controls the heating power of the heating unit according to the temperature signal fed back by the thermocouple.
2. The laying type furnace wall drying device according to claim 1 is characterized in that: There are multiple thermocouples, which are distributed on the electric blanket in a grid format.
3. The laying type furnace wall drying device according to claim 1 is characterized in that: There is a steam dissipation pore in the middle of the electric blanket.
4. The laying type furnace wall drying device according to claim 1 is characterized in that: The electric blanket is provided with a high temperature resistant metal soft chain, and the high temperature resistant metal soft chain is provided with a hanging ear.
5. The laying type furnace wall drying device according to claim 4 is characterized in that: The electric blanket is provided with guide rollers for moving along the surface of the cast lining.
6. The laying type furnace wall drying device according to claim 1 is characterized in that: A heat insulation layer is arranged on a side of the electric blanket away from the cast lining.
7. The laying type furnace wall drying device according to claim 1 is characterized in that: The electric blanket is a flexible blanket that can bend and deform.
8. The laying type furnace wall drying device according to claim 1 is characterized in that: There are multiple electric blankets, which are spliced or separated and laid on the surface of the dried cast lining, and the multiple electric blankets generate heat independently of each other.
9. The laying type furnace wall drying device according to claim 1 is characterized in that: The electric blanket is a whole block structure, and the number of the heating units is multiple, and the multiple heating units generate heat independently of each other.
10. The laying type furnace wall drying device according to claim 1, characterized in that: The outline of the electric blanket is circular, oval or polygonal.