CN220920444U - Rolling oil heating system of cold rolling mill - Google Patents
Rolling oil heating system of cold rolling mill Download PDFInfo
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- CN220920444U CN220920444U CN202322465356.XU CN202322465356U CN220920444U CN 220920444 U CN220920444 U CN 220920444U CN 202322465356 U CN202322465356 U CN 202322465356U CN 220920444 U CN220920444 U CN 220920444U
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- heating system
- steam
- rolling oil
- rolling
- oil
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 148
- 239000010731 rolling oil Substances 0.000 title claims abstract description 91
- 238000005097 cold rolling Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 239000003921 oil Substances 0.000 claims description 34
- 230000001105 regulatory effect Effects 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000007751 thermal spraying Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Metal Rolling (AREA)
Abstract
The utility model relates to the technical field of cold rolling thermal spraying heating, in particular to a cold rolling mill thermal side spraying heating system, which comprises: the auxiliary heating system and the main heating system are connected with the steam inlet of the auxiliary heating system and the outlet of the steam drainage pipeline, the rolling oil outlet of the auxiliary heating system is communicated with the rolling oil inlet of the main heating system, and the rolling oil outlet of the main heating system is communicated with the rolling mill. The hot water and hot steam discharged from the steam drain pipeline are used as a heat source, the heat exchanger is used for carrying out auxiliary heating on the rolling oil before heating, the work load of a main heating system is reduced, the hot water and hot steam discharged from the steam drain valve can be utilized, the temperature of a rolling oil jet outlet on a rolling mill can reach an ideal effect, and the problems of waste of the hot water and hot steam in the steam drain pipeline and low temperature of the jet outlet are effectively solved.
Description
Technical Field
The utility model relates to the field of hot spraying for cold rolling, in particular to a rolling oil heating system of a cold rolling mill.
Background
In the rolling process of cold rolling, if there is a temperature difference between a plate and a roll, a heat transfer phenomenon occurs between the two, wherein the heat transfer direction is from a high temperature to a low temperature. When the temperature of the roller changes, the roller can be thermally deformed according to the principle of thermal expansion and contraction, so that a certain thermal convexity is formed. The existence of the thermal convexity can change the shape of the roll gap, and finally the quality of the plate shape is affected. Therefore, temperature control of the rolls and strip plays an important role in controlling the strip shape. In order to avoid the occurrence of the phenomenon of excessively high temperatures of the rolls and the rolled pieces, a hot edge spraying system is generally used in the rolling production to spray rolling oil onto the surfaces of the strip and the rolls.
The rolling oil starts to solidify when the temperature is lower than 10 ℃, steam is needed to be used for preheating to melt the rolling oil, and a steam pipeline is used for removing part of condensed water and hot steam through a steam drainage pipeline in the operation process, so that the method has available value;
Meanwhile, the outlet temperature of the rolling oil injection needs to be controlled at 105 ℃; however, the existing hot side spraying system of the rolling mill has limited heating capacity, the side spraying temperature can only be maintained at about 96 ℃, the problem of strip side tightening is obvious, the fluctuation of the side plate type is large, and the occurrence of the strip breakage condition of the rolling mill is easy to occur.
In summary, how to use the hot water and hot steam discharged from the steam trap and how to increase the outlet temperature of the rolling oil jet is a problem to be solved.
Disclosure of Invention
In order to solve the problems, the utility model provides a rolling oil heating system of a cold rolling mill, which is used for carrying out auxiliary heating on rolling oil by waste heat in the preheating process and controlling the outlet temperature of rolling oil injection
The utility model solves the problems existing in the prior art through the following technical scheme:
The rolling oil heating system of the cold rolling mill comprises: an auxiliary heating system, a main heating system; the steam inlet of the auxiliary heating system is connected with the outlet of the steam drainage pipeline, hot water and hot air discharged by the steam drainage pipeline are used as heat sources to carry out auxiliary heating on the rolling oil, and the work load of the main heating system is reduced; the rolling oil outlet of the auxiliary heating system is communicated with the rolling oil inlet of the main heating system, and the rolling oil outlet of the main heating system is communicated with a rolling mill, so that the temperature of the rolling oil jet outlet on the rolling mill can achieve an ideal effect, and the rolling mill can be selected as a single-stand rolling mill or a three-stand continuous rolling mill.
Preferably, the auxiliary heating system comprises a steam pipeline, a rolling oil auxiliary heating pipeline and a heat exchanger, wherein the rolling oil auxiliary heating pipeline is communicated with a heat exchange pipe inside the heat exchanger; the outlet of the steam pipeline is connected with the steam inlet of the heat exchanger, and hot water and hot steam exchange heat with rolling oil in the shell and tube heat exchanger to achieve the effect of auxiliary heating.
Preferably, a steam pneumatic regulating valve is arranged between a steam outlet of the steam pipeline and a steam inlet of the heat exchanger to control the opening and closing of the steam pipeline;
An oil inlet pneumatic regulating valve is arranged on the rolling oil auxiliary heating pipeline at the position of the oil inlet of the heat exchange pipe of the heat exchanger and is used for controlling the opening and closing of the rolling oil auxiliary heating pipeline;
The steam pneumatic regulating valve is communicated with a signal line of the oil inlet pneumatic regulating valve, so that heating and oil inlet are performed simultaneously, when rolling oil enters a pipeline, the steam pneumatic regulating valve controls steam to enter the heat exchanger, and the heat exchanger starts to work, so that the rolling oil is heated in an auxiliary mode.
Preferably, the oil inlet side position of the oil inlet pneumatic regulating valve on the rolling oil auxiliary heating pipe is communicated with the oil outlet position of the heat exchange pipe of the heat exchanger through a bypass pipe, and a butterfly valve is arranged on the bypass pipe, so that whether auxiliary heating is performed or not can be selected: opening the valve, and performing no auxiliary heating; and closing the valve to perform auxiliary heating.
A butterfly valve is arranged between the inlet of the steam pipeline and the steam pneumatic regulating valve and is used as a manual valve for repairing; a butterfly valve is arranged between the oil outlet of the heat exchanger and a communication point of the bypass pipe, which is close to the oil outlet of the heat exchanger.
Preferably, one auxiliary heating system communicates with one to four main heating systems to ensure heat stability.
Preferably, the main heating system comprises a rolling oil main heating pipeline and a main heating device, wherein the rolling oil main heating pipeline is communicated with a heat exchange pipe of the main heating device.
Preferably, a butterfly valve is arranged between the rolling oil inlet of the main heating system and the main heating device, and the butterfly valve can be opened or closed to select whether the system where the butterfly valve is positioned heats or not.
Compared with the prior art, the utility model has the beneficial effects that:
1. The hot water and hot steam discharged by the steam drain pipeline are used as a heat source, the heat exchanger is used for carrying out auxiliary heating on the rolling oil before heating, the work load of a main heating system is reduced, the hot water and hot steam discharged by the steam drain valve can be utilized, the temperature of a rolling oil jet outlet on a rolling mill can reach an ideal effect, and the problems of waste of the hot water and hot steam in the steam drain pipeline and low temperature of the jet outlet are effectively solved;
2. The steam pneumatic regulating valve is communicated with a signal line of the oil inlet pneumatic regulating valve, so that auxiliary heating and oil inlet are performed simultaneously; when the rolling oil enters the pipeline, the steam pneumatic regulating valve controls steam to enter the heat exchanger, the heat exchanger starts to work, the rolling oil is heated in an auxiliary mode, and the operation is fast and convenient; when the rolling oil stops being supplied, the steam pneumatic regulating valve cuts off steam, so that the waste of heat sources is avoided;
3. An auxiliary heating system is controlled to carry out auxiliary heating on a plurality of cold rolling mills, hot water vapor of a steam pipeline is fully utilized, a bypass valve is arranged on the auxiliary heating system, a valve is arranged between each main heating system and the auxiliary heating system, the rolling oil is selectively heated according to the actual heating condition of the rolling oil on the rollers, and waste heat resources of the steam drainage pipeline are fully allocated.
Drawings
For a clearer description of embodiments of the utility model or of solutions in the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall circuit of the present utility model;
FIG. 2 is a schematic diagram of an auxiliary heating system piping of the present utility model;
FIG. 3 is a schematic diagram of a main heating system piping of the present utility model.
Wherein: the device comprises a 1-auxiliary heating system steam inlet, a 2-auxiliary heating system rolling oil outlet, a 3-main heating system rolling oil inlet, a 4-main heating system rolling oil outlet, a 5-steam pipeline, a 6-rolling oil auxiliary heating pipeline, a 7-heat exchanger, an 8-steam pneumatic regulating valve, a 9-oil inlet pneumatic regulating valve, a 10-signal line, an 11-bypass pipe, a 12-bypass valve, a 13-first valve, a 14-second valve, a 15-third valve, a 16-rolling oil main heating pipeline, a 17-main heating device and an 18-main heating valve.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
As shown in fig. 1, the rolling oil heating system of the cold rolling mill includes: an auxiliary heating system, a main heating system;
As shown in fig. 2, the steam inlet 1 of the auxiliary heating system is connected with the outlet of the steam drainage pipeline, and the hot water and hot air discharged by the steam drainage pipeline are used as heat sources to carry out auxiliary heating on the rolling oil, so that the work load of the main heating system is reduced; the rolling oil outlet 2 of the auxiliary heating system is communicated with the rolling oil inlet 3 of the main heating system, and the rolling oil outlet 4 of the main heating system is communicated with the rolling mill, so that the temperature of the rolling oil jet outlet on the rolling mill can achieve an ideal effect.
The auxiliary heating system comprises a steam pipeline 5, a rolling oil auxiliary heating pipeline 6 and a heat exchanger 7, wherein the heat exchanger is a tube type heat exchanger, the rolling oil auxiliary heating pipeline 6 is communicated with a heat exchange tube inside the heat exchanger 7, an outlet of the steam pipeline 5 is connected with a steam inlet of the heat exchanger 7, and hot water, hot steam and rolling oil exchange heat in the tube type heat exchanger to achieve the effect of auxiliary heating.
A steam pneumatic regulating valve 8 of DN50 is arranged between a steam outlet of the steam pipeline 5 and a steam inlet of the heat exchanger 7 to control the opening and closing of the steam pipeline 5;
An oil inlet pneumatic regulating valve 9 is arranged on the rolling oil auxiliary heating pipeline 6 at the position of the oil inlet of the heat exchange pipe of the heat exchanger 7, and the opening and closing of the rolling oil auxiliary heating pipeline 6 are controlled;
the steam pneumatic regulating valve 8 is communicated with a signal line 10 of the oil inlet pneumatic regulating valve 9, so that heating and oil inlet are performed simultaneously, when rolling oil enters the auxiliary heating pipeline 6, the steam pneumatic regulating valve 8 controls steam to enter the heat exchanger 7, the heat exchanger 7 starts to work, and auxiliary heating is performed on the rolling oil.
The position of the oil inlet side of the oil inlet pneumatic regulating valve 9 on the rolling oil auxiliary heating pipeline 6 is communicated with the position of the oil outlet of the heat exchange pipe of the heat exchanger 7 through a bypass pipe 11, and the bypass pipe 11 is provided with a butterfly valve 12, so that whether auxiliary heating is performed or not can be selected: opening the valve 12, optionally without auxiliary heating; the valve 12 is closed and auxiliary heating is selected.
A butterfly valve 13 is arranged between the inlet of the steam pipeline 5 and the steam pneumatic regulating valve 8, and is a special manual valve for maintenance; the steam outlet of the heat exchanger 7 is provided with a drain valve 14; a butterfly valve 15 is arranged between the oil outlet of the heat exchanger 7 and the communication point of the bypass pipe 10 near the oil outlet of the heat exchanger 7.
An auxiliary heating system is communicated with two main heating systems, and rolling oil outlets of the two main heating systems are respectively communicated with a three-stand continuous rolling mill and a single-stand rolling mill.
As shown in fig. 3, the main heating system comprises a rolling oil main heating pipeline 16 and a main heating device 17, wherein the main heating device 17 is an electric heater, and the rolling oil main heating pipeline 16 is communicated with a heat exchange tube of the main heating device 17.
A butterfly valve 18 is arranged between a rolling oil inlet 3 of the main heating system and the main heating device 17, and the butterfly valve 18 is opened and closed to select whether the main heating system where the butterfly valve 18 is positioned runs or not according to the needs, so that the main heating system of a plurality of cold rolling mills can be selectively and auxiliarily heated by one auxiliary heating system according to the needs of different racks on hot-side oil spraying temperatures.
The application mode of the utility model is as follows:
Heating:
1. Closing the bypass valve 12, and opening the first valve 13, the second valve 14, the third valve 15 and the main heating valve 18;
2. The oil inlet pneumatic regulating valve 9 is opened, the rolling oil respectively flows through the auxiliary heating system and the main heating system and enters the rolling mill, and the steam pneumatic regulating valve 8 and the oil inlet pneumatic regulating valve 9 are synchronously started and stopped to heat the rolling oil with the main heating system.
Only main heating is performed:
The bypass valve 12 and the main heating valve 18 are opened, and the main heating system heats the rolling oil.
According to the utility model, hot water and hot steam discharged from the steam drain pipeline are used as heat sources, the heat exchanger is used for carrying out auxiliary heating on the rolling oil before heating, so that the work load of a main heating system is reduced, the hot water and hot steam discharged from the steam drain valve can be utilized, the temperature of a rolling oil jet outlet on a rolling mill can reach an ideal effect, and the problems of waste of the hot water and hot steam in the steam drain pipeline and low jet outlet temperature are effectively solved; the steam pneumatic regulating valve is communicated with a signal line of the oil inlet pneumatic regulating valve, so that auxiliary heating and oil inlet are performed simultaneously; when the rolling oil enters the pipeline, the steam pneumatic regulating valve controls steam to enter the heat exchanger, the heat exchanger starts to work, the rolling oil is heated in an auxiliary mode, and the operation is fast and convenient; when the rolling oil stops being supplied, the steam pneumatic regulating valve cuts off steam, so that the waste of heat sources is avoided; an auxiliary heating system is controlled to carry out auxiliary heating on a plurality of cold rolling mills, hot water vapor of a steam pipeline is fully utilized, a bypass valve is arranged on the auxiliary heating system, a valve is arranged between each main heating system and the auxiliary heating system, the rolling oil is selectively heated according to the actual heating condition of the rolling oil on the rollers, and waste heat resources of the steam drainage pipeline are fully allocated.
The utility model has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the utility model, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.
Claims (8)
1. A rolling oil heating system of a cold rolling mill, comprising: an auxiliary heating system, a main heating system; the steam inlet of the auxiliary heating system is connected with the outlet of the steam drainage pipeline; the rolling oil outlet of the auxiliary heating system is communicated with the rolling oil inlet of the main heating system, and the rolling oil outlet of the main heating system is communicated with the rolling mill.
2. The rolling oil heating system of the cold rolling mill according to claim 1, wherein the auxiliary heating system comprises a steam pipeline, a rolling oil auxiliary heating pipeline, a heat exchanger; the rolling oil auxiliary heating pipeline is communicated with a heat exchange pipe inside the heat exchanger; the steam pipeline outlet is connected with the steam inlet of the heat exchanger.
3. Rolling oil heating system of a cold rolling mill according to claim 2, characterized in that a steam pneumatic regulating valve is provided between the steam outlet of the steam line and the steam inlet of the heat exchanger;
An oil inlet pneumatic regulating valve is arranged on the rolling oil auxiliary heating pipeline at the position of the oil inlet of the heat exchange pipe of the heat exchanger;
The steam pneumatic regulating valve is communicated with a signal line of the oil inlet pneumatic regulating valve.
4. A rolling oil heating system of a cold rolling mill according to claim 3, wherein the oil inlet side position of the oil inlet pneumatic control valve on the rolling oil auxiliary heating pipe is communicated with the oil outlet position of the heat exchange pipe of the heat exchanger through a bypass pipe, and a butterfly valve is arranged on the bypass pipe.
5. The rolling oil heating system of the cold rolling mill according to claim 4, wherein a butterfly valve is provided between an inlet of the steam line and a steam pneumatic control valve; and a butterfly valve is arranged between the oil outlet of the heat exchanger and a communication point of the bypass pipe, which is close to the oil outlet of the heat exchanger.
6. The rolling oil heating system of claim 1, wherein the one auxiliary heating system is in communication with at least one main heating system.
7. The rolling oil heating system of claim 6, wherein the main heating system comprises a rolling oil main heating pipe and a main heating device, and wherein the rolling oil main heating pipe is communicated with a heat exchange pipe of the main heating device.
8. The rolling oil heating system of the cold rolling mill according to claim 7, wherein a butterfly valve is provided between the rolling oil inlet of the main heating system and the main heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322465356.XU CN220920444U (en) | 2023-09-12 | 2023-09-12 | Rolling oil heating system of cold rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322465356.XU CN220920444U (en) | 2023-09-12 | 2023-09-12 | Rolling oil heating system of cold rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220920444U true CN220920444U (en) | 2024-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322465356.XU Active CN220920444U (en) | 2023-09-12 | 2023-09-12 | Rolling oil heating system of cold rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220920444U (en) |
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2023
- 2023-09-12 CN CN202322465356.XU patent/CN220920444U/en active Active
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