CN211822330U - Simple heating furnace steam drum water replenishing preheating control system - Google Patents
Simple heating furnace steam drum water replenishing preheating control system Download PDFInfo
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- CN211822330U CN211822330U CN202020095546.0U CN202020095546U CN211822330U CN 211822330 U CN211822330 U CN 211822330U CN 202020095546 U CN202020095546 U CN 202020095546U CN 211822330 U CN211822330 U CN 211822330U
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Abstract
The utility model relates to a simple and easy heating furnace drum moisturizing preheats control system, including automatic water replenishing valve of cistern, cistern liquid level detection, cistern, temperature detection thermal resistance, preheat circulating pump, heat exchanger, flue, moisturizing pump, drum liquid level detection, electrical system, HMI, preheat circulating line, drum moisturizing pipeline. The heat exchanger is installed on the flue of the device, desalted water is heated by using the waste heat of flue gas, and the desalted water in the water storage tank is circulated by using the preheating circulating pump and is used for improving the temperature of the desalted water in the whole water storage tank through the heat exchanger. The temperature and the liquid level of the water reservoir can be set by an operator on an HMI (human machine interface), and the automatic water replenishing valve, the liquid level detection of the water reservoir, the temperature detection thermal resistor and the preheating circulating pump of the water reservoir are connected with an electric control system, so that the automatic control of the water temperature and the liquid level of the water reservoir is realized; the water replenishing pump and the steam pocket liquid level detection are connected with the electric control system, so that the automatic control of the steam pocket water replenishing is realized.
Description
Technical Field
The application belongs to the technical field of hot galvanizing waste heat equipment, and more specifically relates to a simple heating furnace steam drum water replenishing preheating control system.
Background
The hot galvanizing heating furnace is a horizontal furnace, adopts an improved Sendzimir method, has a furnace length of about 114 meters, and comprises a NOF section 1# furnace throat of an oxidation-free furnace, a radiant tube heating RTF section, a soaking section, a furnace throat 2# furnace throat, a rapid cooling section (RJC), a furnace throat 3# furnace throat, a balancing section and a hot tensioning roller chamber. Because the hot galvanizing heating furnace adopts the improved Sendzimir method, the steel strip is heated by open fire at the high temperature of more than 700 ℃ in the non-oxidation furnace section, the temperature of the generated flue gas reaches about 680 ℃, and the temperature of the flue gas still reaches about 120 ℃ after the flue gas is reused by a waste heat boiler. In the production process, after the flue gas is recycled by the waste heat boiler, the residual flue gas is directly discharged into the atmosphere by the smoke exhaust fan, so that the flue gas is greatly wasted.
The existing heating furnace residual heat water replenishing has the following defects:
(1) the reservoir has no liquid level and temperature detection, an operator needs to manually open a water replenishing valve to replenish water to the reservoir, and then the operator carries out on-site manual operation of drum water replenishing through a drum operation button of the on-site operation box. The operation is very complicated, the workload of operators is increased, and meanwhile, due to manual water supplement, the liquid level of the steam drum is easily too high or too low, the normal working state of the steam drum is influenced, and the steam generation amount is reduced;
(2) the steam pocket moisturizing is normal atmospheric temperature desalinized water, and at the in-process of moisturizing, a large amount of microthermal water pours into the steam pocket into fast, is unfavorable for the safe operation of steam pocket promptly and also can influence the work efficiency of steam pocket. Meanwhile, high-temperature flue gas is directly discharged into the atmosphere after passing through the steam drum, and waste of the flue gas is also caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a simple and easy heating furnace drum moisturizing preheats control system, and the accessible man-machine controls interface picture to drum water charging system real-time control, and automatic control moisturizing temperature and cistern liquid level guarantee that the moisturizing temperature is stable about 80 ℃, realizes the automatic accurate control of moisturizing temperature.
In order to solve the above problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a simple and easy heating furnace drum moisturizing preheats control system, which comprises a water storage tank, cistern liquid level detection device and temperature-detecting device of setting in the cistern, preheat circulating pump and moisturizing pump be connected with the cistern, heat exchanger through preheating circulating pipe and preheating circulating pump connection, the drum of being connected through drum moisturizing pipeline and moisturizing pump, set up the drum liquid level detection device on the drum, the heat exchanger sets up on the flue, the other end and the cistern of heat exchanger are connected, still be connected with the automatic moisturizing valve of cistern in the cistern, the automatic moisturizing valve of cistern, cistern liquid level detection device, temperature-detecting device, preheat the circulating pump, the heat exchanger, the moisturizing pump, drum liquid level detection device all is connected with the electrical system electricity, electrical system controls the interface electricity through industrial ethernet and man-machine and is connected.
The utility model discloses technical scheme's further improvement lies in: the water storage tank is internally provided with desalted water.
The utility model discloses technical scheme's further improvement lies in: the temperature detection device is a temperature detection thermal resistor.
The utility model discloses technical scheme's further improvement lies in: the part of the temperature detection thermal resistor inserted into the water storage tank is provided with an anticorrosive coating which is a ceramic anticorrosive coating.
The utility model discloses technical scheme's further improvement lies in: the preheating circulating pumps are two, the preheating circulating pipelines connected between the preheating circulating pumps and the heat exchanger are two corresponding groups, and the two preheating circulating pumps are electrically connected with the electric control system.
The utility model discloses technical scheme's further improvement lies in: the heat exchanger comprises a first fin group and a second fin group which are arranged side by side, and the fin densities of the first fin group and the second fin group are different.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains is: the device simplifies the operation of an operator, the operator only needs to set the temperature of the reservoir and the liquid level of the reservoir on a man-machine control interface picture, the preheating and water supplementing system can automatically and circularly operate, and the liquid level of the reservoir and the temperature of the reservoir can be automatically and perfectly adjusted. The temperature of drum water replenishing is improved, automatic control of drum water replenishing is realized, and the condition that the liquid level fluctuation of manual drum liquid level is large is avoided. The utility model provides the temperature of steam pocket moisturizing has been promoted, has solved cistern liquid level, temperature and steam pocket moisturizing automatic control's problem, has stopped the extravagant phenomenon of flue gas, has stopped the undulant big phenomenon of steam pocket moisturizing. The system meets the requirements of the production process in actual operation and obtains good application effect.
Drawings
FIG. 1 is a schematic connection diagram of a conventional heating furnace drum water supplement control system;
FIG. 2 is a schematic connection diagram of the present invention;
wherein: 1. the automatic water replenishing device comprises a water reservoir automatic water replenishing valve 2, a water reservoir liquid level detection device 3, a water reservoir 4, a temperature detection device 5, a preheating circulating pump 6, a heat exchanger 7, a flue 8, a water replenishing pump 9, a steam drum 10, a steam drum liquid level detection device 11, an electric control system 12, a man-machine control interface 13, a preheating circulating pipeline 14 and a steam drum water replenishing pipeline.
Detailed Description
The present invention will be described in further detail with reference to examples.
The utility model discloses a simple and easy heating furnace drum moisturizing preheats control system, including cistern 3, reservoir liquid level detection device 2 and the temperature-detecting device 4 of setting in cistern 3, preheat circulating pump 5 and moisturizing pump 8 of being connected with cistern 3, through preheating circulating line 13 and the heat exchanger 6 of preheating circulating pump 5 and being connected, the drum 9 of being connected through drum moisturizing pipeline 14 and moisturizing pump 8, set up drum liquid level detection device 10 on drum 9, heat exchanger 6 sets up on flue 7, the other end and the cistern 3 of heat exchanger 6 are connected, heat exchanger 6 is connected with electrical system 11. The automatic water replenishing valve 1 of the water storage tank is further connected in the water storage tank 3, the automatic water replenishing valve 1 of the water storage tank, the water level detection device 2 of the water storage tank, the temperature detection device 4, the preheating circulating pump 5, the water replenishing pump 8 and the steam drum liquid level detection device 10 are all electrically connected with the electric control system 11, and the electric control system 11 is electrically connected with the human-computer control interface 12 through the industrial Ethernet.
The reservoir 3 is filled with desalted water. The temperature detection device 4 is a temperature detection thermal resistor. The part of the temperature detection thermal resistor inserted into the reservoir 3 is provided with an anticorrosive coating which is a ceramic anticorrosive coating. Preheating circulating pump 5 is two, and the preheating circulating pipe 13 of connecting between preheating circulating pump 5 and the heat exchanger 6 is two sets of for corresponding, and two preheating circulating pump 5 all are connected with electrical system 11 electricity.
In order to improve the heat exchange efficiency, the heat exchanger 6 comprises a first fin group and a second fin group which are arranged side by side, and the fin density of the first fin group is different from that of the second fin group.
The utility model discloses with installation heat exchanger 6 on flue gas exhaust pipe 7, utilize the waste heat of flue gas to heat the demineralized water to the temperature that circulating pump 5 is used for improving whole cistern demineralized water through flue gas heat exchanger 6 to the demineralized water circulation of cistern 3 is preheated in the utilization. The temperature and the liquid level of the reservoir 3 can be set by an operator on a man-machine control interface 12, and the automatic water replenishing valve 1, the reservoir liquid level detection device 2, the reservoir 3, the temperature detection device 4 and the preheating circulating pump 5 of the reservoir are connected with an electric control system 11, so that the automatic control of the temperature of the reservoir 3 and the liquid level of the reservoir 3 is realized; the water replenishing pump 8 and the steam drum liquid level detection device 10 are connected with the electric control system 11, so that the automatic control of the water replenishing of the steam drum 9 is realized.
The utility model discloses control flow does: when the system normally operates, an operator sets the liquid level of a reservoir 3 and the temperature of the reservoir 3 on a picture of a man-machine control interface 12 according to production requirements, a preheating circulating pump 5 operates at a rated rotating speed of a motor, a reservoir liquid level detection device 2 is in electric control closed loop association with the picture of the man-machine control interface 12, an automatic reservoir water supplementing valve 1 is electrically connected with an electric control system 11, the electric control system 11 controls the opening and closing of a valve of the automatic reservoir water supplementing valve 1 through PID calculation in real time, and therefore the flow of desalted water is adjusted to keep the liquid level of the reservoir to reach the liquid level of the reservoir set; the electric control system 11 controls the start and stop of the preheating circulating pump 5 in real time through PID calculation according to the temperature of the water reservoir displayed by the temperature detection device 4. The electronic control system 11 sends a control command to the preheating circulating pump 5, when the difference between the temperature of the water storage tank and the temperature set value of the human-computer control interface 12 is larger than 10 ℃, 2 preheating circulating pumps 5 are started simultaneously, and when the temperature difference is smaller than +/-5 ℃, 1 preheating circulating pump 5 is started, so that the temperature of the water storage tank is ensured to meet the production requirement and the damage of equipment caused by frequent starting and stopping of one preheating circulating pump 5 is avoided. Of course, the electronic control system 11 may also be in other control manners as long as the control function can be realized, and will not be described herein again.
Claims (6)
1. The utility model provides a simple and easy heating furnace drum moisturizing preheats control system which characterized in that: including cistern (3), reservoir liquid level detection device (2) and temperature-detecting device (4) of setting in cistern (3), preheat circulating pump (5) and moisturizing pump (8) be connected with cistern (3), heat exchanger (6) be connected with preheating circulating pump (5) through preheating circulating pipeline (13), steam pocket (9) be connected with moisturizing pump (8) through steam pocket moisturizing pipeline (14), steam pocket liquid level detection device (10) of setting on steam pocket (9), heat exchanger (6) set up on flue (7), the other end and the cistern (3) of heat exchanger (6) are connected, still be connected with automatic moisturizing valve of cistern (1) in cistern (3), automatic moisturizing valve of cistern (1), cistern liquid level detection device (2), temperature-detecting device (4), preheat circulating pump (5), heat exchanger (6), The water replenishing pump (8) and the steam drum liquid level detection device (10) are electrically connected with an electric control system (11), and the electric control system (11) is electrically connected with a human-computer control interface (12) through an industrial Ethernet.
2. The simple heating furnace drum water replenishing preheating control system according to claim 1, characterized in that: the water storage tank (3) is filled with desalted water.
3. The simple heating furnace drum water replenishing preheating control system according to claim 2, characterized in that: the temperature detection device (4) is a temperature detection thermal resistor.
4. The simple heating furnace drum water replenishing preheating control system according to claim 3, characterized in that: the part of the temperature detection thermal resistor inserted into the reservoir (3) is provided with an anticorrosive coating which is a ceramic anticorrosive coating.
5. The simple heating furnace drum water replenishing preheating control system according to claim 4, characterized in that: the preheating circulating pumps (5) are two, the preheating circulating pipelines (13) connected between the preheating circulating pumps (5) and the heat exchanger (6) are two corresponding groups, and the two preheating circulating pumps (5) are electrically connected with the electric control system (11).
6. The simple heating furnace drum water replenishing preheating control system according to claim 5, characterized in that: the heat exchanger (6) comprises a first fin group and a second fin group which are arranged side by side, and the fin densities of the first fin group and the second fin group are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020095546.0U CN211822330U (en) | 2020-01-16 | 2020-01-16 | Simple heating furnace steam drum water replenishing preheating control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020095546.0U CN211822330U (en) | 2020-01-16 | 2020-01-16 | Simple heating furnace steam drum water replenishing preheating control system |
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| Publication Number | Publication Date |
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| CN211822330U true CN211822330U (en) | 2020-10-30 |
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| CN202020095546.0U Active CN211822330U (en) | 2020-01-16 | 2020-01-16 | Simple heating furnace steam drum water replenishing preheating control system |
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