Evaporative cooling water supply system of heating furnace
By introducing an ejector device into the vaporization cooling system of the hot rolling furnace to supplement low-temperature feedwater, the problems of pipeline vibration and increased resistance caused by the steam-water mixture were solved, thereby improving the stability and safety of the system and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-03-24
AI Technical Summary
In the existing hot rolling furnace vaporization cooling system, the mixture of steam and water causes pipeline vibration, increased resistance and safety hazards, and may cause water shortage in the furnace in emergency situations, affecting system stability and energy consumption.
An ejector device is introduced at the beginning of the riser manifold to supplement low-temperature feedwater through a feedwater pump, thereby reducing the steam content and resistance loss of the steam-water mixture, alleviating vibration problems, and reducing the total system resistance through the ejector device.
This reduces the steam content and resistance loss of the steam-water mixture in the riser manifold, improves the stability and safety of the system, saves energy, and conforms to the environmental protection concept of energy conservation and emission reduction.
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Figure CN224034390U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the hot rolling heating furnace process technical field of metallurgical industry relates to a kind of heating furnace vaporization cooling water supply system. BACKGROUND
[0002] The vaporization cooling system of hot rolling heating furnace, as the key equipment in the steel production process, its original intention is to cope with the efficient cooling and energy recovery demand under high-temperature metallurgical environment. The system takes out the large amount of heat generated in the heating furnace in the form of steam through the phase change process of water, which not only realizes the effective cooling of the heating furnace, but also improves the energy utilization efficiency through the recycling of steam.
[0003] In the vaporization cooling system, the feedwater pump first pressurizes the low-temperature feedwater and sends it into the steam drum. As the core component of the system, the steam drum not only stores the feedwater, but also provides the necessary pressure environment for the subsequent water circulation and steam generation. The conventional steam-water flow process is as follows: the feedwater pump sends water to the steam drum, and then, under the push of the hot water circulating pump, the water in the steam drum is sent into the water beam of the heating furnace through the hot water circulating pump. The water beam, as a heat exchange element, is directly exposed to the high-temperature furnace, and the water in the steam drum absorbs the heat in the furnace and gradually vaporizes into a steam-water mixture. These steam-water mixtures return to the steam drum through the riser pipe, and the generated steam is sent out, and the cycle continues.
[0004] However, in the riser pipe, due to the presence of steam-water mixture, the pipe is prone to vibration, which not only affects the stability of the system, but also may cause safety accidents such as pipe rupture. The more the steam content in the steam-water mixture, the greater the resistance of the pipe, which not only increases the energy consumption of the system, but also may affect the smoothness of the water circulation. In addition, the vaporization cooling system also needs to cope with some critical situations. For example, in the case of abnormal rapid pressure drop of the steam drum, the water in the riser pipe may rapidly vaporize, resulting in sudden increase of steam content. In this case, the water beam of the heating furnace may appear water shortage phenomenon, and then cause the overheating and damage of the heating furnace.
[0005] Therefore, there is an urgent need for a technical solution to solve the above problems. UTILITY MODEL CONTENT
[0006] Therefore, the purpose of the utility model is to provide a kind of heating furnace vaporization cooling water supply system, through the injection device, low-temperature feedwater is supplemented to the initial section of riser pipe, which reduces the steam content of steam-water mixture in riser pipe, also reduces the resistance loss of riser pipe, and at the same time, alleviates the vibration problem of riser pipe.
[0007] To achieve the above purpose, the utility model provides the following technical solutions:
[0008] The application relates to a heating furnace vaporization cooling water supply system, which comprises a steam drum, a fixed water beam and a movable water beam, the water inlets of the fixed water beam and the movable water beam are connected with the water outlet of the steam drum through first pipelines, the water outlets of the fixed water beam and the movable water beam are connected with the water inlets of the steam drum through rising headers, an ejector device is arranged at the end of the rising header away from the steam drum, a water supply pump for supplying low-temperature water is connected with the ejector device, the low-temperature water is supplied to the rising header through the water supply pump, the steam content of the steam-water mixture in the rising header is reduced, and the resistance loss of the rising header is reduced.
[0009] Optionally, a hot water circulating pump is arranged on the first pipeline.
[0010] Optionally, the water inlet of the movable water beam is provided with a water inlet stepping device, and the water outlet is provided with a water outlet stepping device.
[0011] Optionally, the water outlets of the fixed water beam and the movable water beam are connected with the rising header through second pipelines.
[0012] Optionally, the ejector device is arranged on each second pipeline.
[0013] Optionally, the ejector device is arranged at the end of the rising header away from the steam drum.
[0014] Optionally, the water supply pump is connected with the ejector device through a third pipeline.
[0015] Optionally, a steam outlet is arranged on the steam drum.
[0016] The application has the advantages that:
[0017] The application supplies low-temperature water to the initial section of the rising header through the ejector device, reduces the steam content of the steam-water mixture in the rising header, reduces the resistance loss of the rising header, relieves the vibration problem of the rising header, and the ejector device also helps to reduce the total resistance loss of the system.
[0018] Other advantages, objects and features of the application will be clarified in the following description, and will be apparent to those skilled in the art based on the following description, or can be taught by the practice of the application. The objects and other advantages of the application can be realized and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will make the preferred detailed description of the utility model combined with the drawings, wherein:
[0020] Fig. 1 It is the schematic view that fixed beam rising header and movable beam rising header are separately arranged;
[0021] Fig. 2 It is the schematic view that fixed beam rising header and movable beam rising header are combined.
[0022] Reference signs:
[0023] 1 steam drum, 2 hot water circulating pump, 3 fixed water beam, 4 movable water beam, 5 water inlet stepping device, 6 water outlet stepping device, 7 feed pump, 8 injection device, 9 rising header, 10 first pipeline, 11 second pipeline, 12 third pipeline. DETAILED DESCRIPTION
[0024] The implementation mode of the utility model is explained below through specific concrete examples, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the content disclosed in the specification. The utility model can also be implemented or applied through other different concrete implementation modes, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the utility model in a schematic manner, and the following examples and features in the examples can be combined with each other without conflict.
[0025] Wherein, the drawings are only used for example description, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the utility model; in order to better illustrate the embodiments of the utility model, some components in the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.
[0026] The same or similar reference signs in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back" and the like is based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore the terms describing the position relationship in the drawings are only used for example description, and cannot be understood as a limitation on the utility model, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.
[0027] Please refer toFigs. 1-2 The application discloses a heating furnace vaporization cooling water supply system, which comprises a steam drum 1 for storing and circulating water vapor, a fixed water beam 3 and a movable water beam 4, the water inlet of the fixed water beam 3 and the water inlet of the movable water beam 4 are connected with the water outlet of the steam drum 1 through a first pipeline 10 respectively, and the water outlet of the fixed water beam 3 and the water outlet of the movable water beam 4 are connected with the water inlet of the steam drum 1 through a rising header 9 respectively; the rising header 9 is provided with an ejector device 8 at an end away from the steam drum 1, and the ejector device 8 is connected with a water supply pump 7 for providing low-temperature water; the low-temperature water is supplied to the rising header 9 through the water supply pump 7, so that the steam content and the resistance loss of the steam-water mixture in the rising header 9 are reduced.
[0028] Preferably, the first pipeline 10 is provided with a hot water circulating pump 2 for pumping water out of the steam drum 1 and into the fixed water beam 3 and the movable water beam 4 respectively for heat absorption.
[0029] Preferably, the water inlet of the movable water beam 4 is provided with a water inlet stepping device 5, and the water outlet is provided with a water outlet stepping device 6; the water inlet stepping device 5 and the water outlet stepping device 6 are used for controlling the flow and speed of water entering and leaving the water beam, so that accurate water flow control is realized.
[0030] Preferably, the water supply pump 7 is connected to the ejector device 8 through a third pipeline 12, so that the low-temperature water is supplied to the ejector device 8 at a constant pressure and smoothly enters the rising header 9.
[0031] Preferably, the steam drum 1 is further provided with a steam outlet.
[0032] The steam in the steam drum 1 is sent out from the steam outlet, the remaining water is pumped out by the hot water circulating pump 2, part of the water enters the fixed water beam 3 for heat absorption, and the other part of the water enters the movable water beam 4 for heat absorption after passing through the water inlet stepping device 5, the water is changed into a steam-water mixture after heat absorption, the low-temperature water is supplied to the rising header 9 through the ejector device 8 by the water supply pump 7, and the low-temperature water is mixed with the steam-water mixture in the rising header 9, the water outlet of the fixed water beam 3 and the water outlet of the movable water beam 4 enter the rising header 9 through the ejector device 8 and are mixed, and then the water returns to the steam drum 1, so as to realize circulation.
[0033] The low-temperature water is preferably 104 DEG C deoxygenated water, and normal temperature water without deoxygenation can be selected for a small system; when a coal economizer is arranged in the system, water with a temperature higher than 104 DEG C and not saturated can be selected.
[0034] The number of water inlet and outlet branch pipes of the fixed water beam 3 and the movable water beam 4 can be changed according to actual water beam arrangement, and the number of the hot water circulating pump 2, the water supply pump 7 and the stepping devices can be increased according to requirements.
[0035] Embodiment one
[0036] As Fig. 1As shown, the water outlets of the fixed water beam 3 and the movable water beam 4 are communicated to the rising header 9 through the second pipelines 11 respectively, and each of the second pipelines 11 is provided with an injection device 8, the injection device 8 supplements the low-temperature feed water to the second pipeline 11, and then the low-temperature feed water flows into the rising header 9 from the second pipeline 11.
[0037] Embodiment two
[0038] As Fig. 2 shown, different from the embodiment one, after the water outlets of the fixed water beam 3 and the movable water beam 4 are communicated to the rising header 9 through the second pipelines 11, the injection device 8 is arranged at the end of the rising header 9 away from the steam drum 1, i.e. the starting section of the rising header 9, and the injection device 8 directly supplements the low-temperature feed water to the rising header 9.
[0039] The system of the utility model not only ensures the safe operation of the heating furnace, but also realizes the effective utilization of energy through the recovery of steam, accords with the environmental protection concept of energy saving and emission reduction. The overall system structure is compact, the connection relationship between the components is clear and definite, and the installation and maintenance are facilitated. Through the design of the injection device 8, the vibration and the resistance loss of the rising header 9 are reduced, and the stability and the safety of the system are improved. Due to the reduction of the total resistance loss of the system, the lift of the hot water circulating pump 2 can be appropriately reduced during the selection, so that the power consumption of the water pump is saved, and the operation cost is reduced.
[0040] Finally, it is explained that the above embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical scheme, and all should be covered in the claim range of the utility model.
Claims
1. A vaporization cooling water supply system for a heating furnace, characterized in that: The system includes a steam drum (1), a fixed water beam (3), and a movable water beam (4). The inlets of the fixed water beam (3) and the movable water beam (4) are connected to the outlets of the steam drum (1) via a first pipe (10). The outlets of the fixed water beam (3) and the movable water beam (4) are connected to the inlets of the steam drum (1) via a riser manifold (9). An ejector device (8) is provided at the end of the riser manifold (9) away from the steam drum (1). A feed pump (7) for providing low-temperature feed water is connected to the ejector device (8). The ejector device (8) replenishes the low-temperature feed water to the riser manifold (9) through the feed pump (7), thereby reducing the steam content and resistance loss of the steam-water mixture in the riser manifold (9).
2. The heating furnace vaporization cooling water supply system according to claim 1, characterized in that: A hot water circulation pump (2) is installed on the first pipe (10).
3. The heating furnace vaporization cooling water supply system according to claim 1, characterized in that: The inlet of the movable water beam (4) is equipped with an inlet stepping device (5), and the outlet is equipped with an outlet stepping device (6).
4. The heating furnace vaporization cooling water supply system according to claim 1, characterized in that: The outlets of the fixed water beam (3) and the movable water beam (4) are respectively connected to the rising manifold (9) through the second pipe (11).
5. The heating furnace vaporization cooling water supply system according to claim 4, characterized in that: Each of the second pipes (11) is equipped with the ejector device (8).
6. The heating furnace vaporization cooling water supply system according to claim 4, characterized in that: The ejector device (8) is provided at the end of the riser manifold (9) away from the steam drum (1).
7. The heating furnace vaporization cooling water supply system according to any one of claims 5 or 6, characterized in that: The water pump (7) is connected to the ejector device (8) through the third pipe (12).
8. The heating furnace vaporization cooling water supply system according to claim 1, characterized in that: The steam drum (1) is equipped with a steam outlet.