CN214742229U - Self-control type draught fan shaft cooling system - Google Patents
Self-control type draught fan shaft cooling system Download PDFInfo
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- CN214742229U CN214742229U CN202120936895.5U CN202120936895U CN214742229U CN 214742229 U CN214742229 U CN 214742229U CN 202120936895 U CN202120936895 U CN 202120936895U CN 214742229 U CN214742229 U CN 214742229U
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Abstract
The utility model discloses a fan axle cold system is drawn to automatic control formula. The utility model discloses a: draught fan bearing box air supply system includes: the air conditioner comprises a fan, an air supply duct and an air outlet temperature detection unit; one end of the air supply duct is connected with the fan, and the other end of the air supply duct is connected with a bearing box of the draught fan; an air outlet temperature detection unit is arranged on the air outlet; a cooling cycle processing system comprising: an air cooler and a refrigerant supply system; the air cooler is communicated with an air supply duct of a bearing box of the induced draft fan through a first pipeline and a second pipeline and is communicated with a refrigerant supply system through a third pipeline and a fourth pipeline; and the controller controls the cooling circulation processing system to be opened and closed according to the detection result of the air outlet temperature detection unit. The utility model provides a draught fan lead to the problem that the fault rate is high because of high temperature. Through to draught fan air outlet temperature monitoring, guarantee to carry sufficient cooling air volume and low temperature wind, guarantee that bearing box temperature is relatively stable and not superelevation, reduce the fault rate of draught fan.
Description
Technical Field
The utility model belongs to the field of power plant's fan cooling system, specifically speaking relates to a cold system of automatic control formula draught fan axle.
Background
The bearing of the boiler induced draft fan can generate high temperature in the working process, once the temperature is too high, the whole unit can be forced to reduce the load, even cause the shutdown accident, and the economic loss is huge; therefore, the temperature of the bearing of the induced draft fan needs to be controlled, and the occurrence of adverse accidents is prevented.
Chinese patent with application number CN204200693U discloses a cooling air system for bearing box of induced draft fan, which comprises a bearing box cooling air cover covering the bearing box, a conical cooling air cover connected with the bearing box cooling air cover, a conical transitional cooling air pipe connected with the conical cooling air cover, a cooling air pipe connected with the conical transitional cooling air pipe, a three-way pipe connected with the cooling air pipe, and a cooling fan connected with the three-way pipe, wherein a plurality of air return holes are arranged on the conical cooling air cover.
In view of this, the present invention is provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art, provides a cold system of automatic control formula draught fan axle, through to draught fan bearing box air supply system real time monitoring, in case the temperature risees and surpasss the rated value, just send into more low temperature cold winds to draught fan bearing box air supply system, reduces the ambient temperature in the bearing box, makes it resume normal temperature control range, prevents that the bearing box from leading to the emergence of harmful accident because of the high temperature.
In order to solve the technical problem, the utility model adopts the following basic concept: a self-control draught fan shaft cooling system comprises a draught fan bearing box air supply system, a cooling circulation processing system and a controller.
Draught fan bearing box air supply system includes: fan, air supply duct, air outlet temperature detecting element.
The one end in air supply wind channel the fan is connected, and the other end is connected with draught fan bearing housing, air outlet temperature detecting element be located air supply wind channel, and with controller electric connection.
The cooling circulation processing system comprises: an air cooler having an air inlet, an air outlet, a refrigerant inlet, and a refrigerant outlet, and a refrigerant supply system.
A first pipeline is arranged between the air inlet and the outlet of the fan, and a second pipeline is arranged between the air outlet and the air supply duct.
And a third pipeline and a fourth pipeline are arranged between the refrigerant inlet and the refrigerant outlet and the refrigerant supply system respectively.
And the controller controls the cooling circulation processing system to be opened and closed according to the detection result of the air outlet temperature detection unit.
Set up draught fan bearing box air supply system in draught fan bearing box department, be connected bearing box with this draught fan bearing box air supply system, in case the bearing box temperature is too high, the feedback signal of air outlet temperature detecting element can report to the police to the cooling cycle processing system, starts the further cooling of cooling cycle processing system to the cold air of input, can reduce in summer or because of the special circumstances causes the bearing box ambient temperature to last the incidence of the harmful accident that the too high causes.
The cooling circulation processing system is provided with an air cooler, partial air conveyed by the air feeder can be cooled again by shunting to the air cooler through a first pipeline to form low-temperature air, and the low-temperature air is conveyed to an air supply air channel through a second pipeline to mix flow, so that secondary cooling of cold air entering the bearing box is realized.
The cooling circulation processing system can also realize automatic control by matching with a feedback signal of the bearing box air supply system of the induced draft fan, so that the bearing box air supply system of the induced draft fan can run more stably, and the control precision is higher.
Furthermore, the air outlet temperature detection unit is close to the bearing box of the induced draft fan and is positioned near the outlet end of the air supply duct.
The air outlet temperature detection unit is arranged near the outlet end of the air supply duct close to the bearing box of the induced draft fan, so that the air temperature change near the bearing box can be sensed more quickly, and once the set temperature is exceeded, an air supply signal is sent out in time; in case of abnormal high temperature, the cooling circulation processing system can be quickly fed back to reduce the temperature, so that the working environment temperature of the bearing box is more stable, and the phenomenon of overhigh temperature is not easy to occur.
Further, still include the air control valve, the air control valve sets up on first pipeline.
The first pipeline is provided with an air regulating valve which can be closed in a time period without cooling, and the cooling circulation processing system is put into operation when required, so that the air quantity input into the air cooler is regulated, and the energy conservation is facilitated.
Furthermore, the air regulating valve is a temperature control valve and is electrically connected with the air outlet temperature detection unit with feedback control.
The air outlet temperature detection unit arranged on the air supply duct is electrically connected with a temperature control valve of the cooling circulation processing system in a signal feedback mode, when the controller receives signal feedback that the temperature exceeds the second rated temperature, the air regulating valve receives an instruction of the controller and opens the controller, the cooling circulation processing system is started, cooling air with lower temperature is conveyed, and the rapid rise of the temperature in the bearing box is controlled until the temperature is recovered to be normal. The temperature control valve has the characteristics of quick response time, high precision, reliable sealing performance and convenient operation.
Still include cold water volume governing valve, cold water volume governing valve sets up on the third pipeline.
Further, still include cold water volume control valve, cold water volume control valve sets up on the third pipeline.
The cold water quantity regulating valve is arranged on the third pipeline and can regulate the flow of cold water entering the air cooler, so that the air quantity of cold air which enters the air supply air duct and is cooled by the air cooler and has lower temperature is controlled.
Furthermore, the cooling water system also comprises a cooling water return valve, and the cooling water return valve is arranged on the fourth pipeline.
And a cooling water return valve is arranged on the fourth pipeline, so that the return water quantity of the cooling water is conveniently adjusted, and the air cooler is cut off from a circulating water loop or used for replacing a drain valve when the air cooler is convenient to overhaul.
Furthermore, the water drain valve is arranged on the fourth pipeline and is positioned between the cooling water return valve and the air cooler.
And a drain valve is arranged on the fourth pipeline, so that the phenomenon that the temperature of the whole water circulation loop of the cooling water is too low and the whole cooling water is frozen in winter can be prevented.
Furthermore, the refrigerant supply system is a cooling water system drained from a cooling system of the oil cooler of the oil station.
Because the oil station oil cooler is arranged on the unit system, the lubricating oil in the bearing box is ensured to be cooled quickly; generally, a cooling system of an oil cooler of an oil station is a cooling water circulation system, so that when the air cooler system is used, cooling water of the oil cooler of the oil station can be directly guided to the air cooler, and the air cooler is cooled; meanwhile, the investment cost for independently establishing the cooling system is saved.
Further, still include air supply control valve, air supply control valve sets up on the air supply wind channel, is located between first pipeline and the second pipeline.
Set up the stop valve on supply air duct, can cut off from the fan direct to the bearing box internal air supply, especially in the hot summer, ambient temperature on every side is very high, at this moment, close the stop valve, make the air supply of fan whole through first pipeline entering cooling circulation system cool off, get into the air supply wind channel from the second pipeline again, finally send into the bearing box with the low temperature air that is less than ambient temperature in, carry out the heat transfer cooling and handle, such heat transfer effect is better, can reduce the bearing box from the high temperature district to reasonable temperature district more easily than the air that directly sends into ambient temperature, guarantee the normal operating of draught fan.
Furthermore, the fans are cooling sources of the induced draft fan shaft air cooler system, at least two fans are provided, and the fans are connected with the connector in a parallel connection mode.
In the system, the fans are used as cooling sources of an induced draft fan shaft air cooler system, at least two fans are arranged for one use and one standby under normal conditions, and the condition that when one fan fails to work due to faults, other fans can still be used is prevented; meanwhile, the maintenance work of the fan is convenient to implement in a power plant under a non-stop state; in summer or under the special high temperature state, can start many fans simultaneously, as early as possible realization is to the cooling effect of bearing box, prevents the emergence of harmful effects.
After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has.
The air outlet temperature detection unit is additionally arranged, so that the change of the ambient temperature of the bearing box can be monitored in real time, and the starting and stopping of the air supply fan and the cooling circulation system are realized more accurately, so that the relative stability of the ambient temperature of the bearing box and the cold air in the air supply air duct is ensured, and the failure rate of the draught fan is reduced.
The opening degree of an air regulating valve at the inlet of the air cooler is controlled according to the change of the ambient temperature of the bearing ring of the induced draft fan, the adjusting amplitude is small, and the adjusting precision is high.
The air outlet temperature detection unit is electrically connected with the air regulating valve at the inlet of the air cooler through signal feedback, so that the automatic regulation and control function can be realized, and the human resources are saved.
The temperature control of the cold air fed in can be realized by additionally arranging an air cooler and a related cooling circulation system; especially, when the indoor and outdoor ambient temperature in summer is higher, low-temperature cold air lower than the ambient temperature can still be provided, so that the bearing box is prevented from being ultrahigh in ambient temperature, and the failure rate of the induced draft fan in an extremely high-temperature environment is reduced.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of the air-cooling fan system of the present invention;
in the figure:
1. a fan; 2. an air supply control valve; 3. an air supply duct; 4. an air outlet temperature detection unit;
5. a first conduit; 6. an air regulating valve; 7. a second conduit; 8. an air cooler;
9. a third pipeline; 10. a cold water amount regulating valve; 11. a fourth conduit; 12. a cooling water return valve;
13. a drain valve; 14. a refrigerant supply system; 15. an oil station oil cooler; 16. a bearing housing;
it should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the utility model relates to a cold system of automatic control formula induced draft fan axle, including draught fan bearing box air supply system, cooling cycle processing system and controller.
Draught fan bearing box air supply system includes: fan 1, air supply duct 3, air outlet temperature detecting element 4.
One end of the air supply air duct 3 is connected with the fan 1, the other end of the air supply air duct is connected with the bearing box 16 of the draught fan, and the air outlet temperature detection unit 4 is positioned on the air supply air duct 3 and is electrically connected with the controller.
The cooling circulation processing system comprises: an air cooler 8 and a coolant supply system 14, the air cooler 8 having an air inlet, an air outlet, a coolant inlet and a coolant outlet.
A first pipeline 5 is arranged between the air inlet and the outlet of the fan 1, and a second pipeline 7 is arranged between the air outlet and the air supply duct 3.
A third pipeline 9 and a fourth pipeline 11 are respectively arranged between the refrigerant inlet and the refrigerant outlet and the refrigerant supply system 14.
And the controller controls the cooling circulation processing system to be opened and closed according to the detection result of the air outlet temperature detection unit 4.
The air outlet temperature detection unit 4 is close to the bearing box 16 of the induced draft fan and is positioned near the outlet end of the air supply duct 3.
The self-control induced draft fan shaft cooling system further comprises an air regulating valve 6 used for regulating the air flow entering the cooling circulation treatment system, and the air regulating valve 6 is arranged on the first pipeline 5.
According to the self-control draught fan shaft cooling system, the air adjusting valve 6 is electrically connected with the controller, and the controller controls the flow of the air adjusting valve 6 according to the detection result of the air outlet temperature detection unit 4.
The self-control induced draft fan shaft cooling system further comprises a cold water quantity regulating valve 10, and the cold water quantity regulating valve 10 is arranged on the third pipeline 9. The cooling water circulating system further comprises a cooling water return valve 12, and the cooling water return valve 12 is arranged on the fourth pipeline 11. And the water trap 13 is arranged on the fourth pipeline 11, and the water trap 13 is positioned between the cooling water return valve 12 and the air cooler 8.
In the self-control draught fan shaft cooling system, the refrigerant supply system 14 is a cooling water system which is drained from a cooling system of an oil cooler 15 of an oil station; the air supply control device further comprises an air supply control valve 2, wherein the air supply control valve 2 is arranged on the air supply air channel 3 and is positioned between the first pipeline 5 and the second pipeline 7; the fans 1 are cooling sources of an induced draft fan shaft air cooler system, at least two fans are arranged, and the fans 1 are connected with the connector in a parallel connection mode; the fan 1 uses a booster fan.
Example one
As shown in fig. 1, the self-control induced draft fan shaft cooling system according to the embodiment includes an induced draft fan bearing box air supply system, a cooling cycle processing system, a first pipeline 5 and a second pipeline 7. Wherein, draught fan bearing box air supply system and cooling cycle processing system are linked together through first pipeline 5 and second pipeline 7.
Draught fan bearing box air supply system includes: the air conditioner comprises a fan 1, a connector, an air supply duct 3 and an air outlet temperature detection unit 4.
The draught fan 1 in the bearing box air supply system of the draught fan is a cooling source of the system, the number of the draught fan 1 is at least two, the temperature of the bearing box 16 and the ambient temperature have a certain temperature difference in spring, autumn and winter, the lower the ambient temperature is, and after the temperature of the bearing box 16 is cooled and radiated by the ambient temperature, the more difficult the accident of high-temperature fault shutdown is usually generated; therefore, a one-use-one-standby scheme is usually adopted, so that the fan 1 can be freely switched when being overhauled without influencing the shutdown of the whole system. In hot summer, because the ambient temperature is also very high, bearing box 16 radiating effect is very poor, for guaranteeing bearing box 16 normally works under rated temperature, generally adopt to increase cold wind flow, improve the effect of heat transfer. At this time, two or more fans 1 can be simultaneously started to ensure the heat dissipation effect of the bearing box 16 and prevent the occurrence of unexpected breakdown shutdown. Fan 1 can use booster fan, guarantees that whole draught fan bearing box air supply system's wind pressure is stronger, and the heat dissipation circulation effect is better.
The fans 1 are connected with the connector in parallel; one adapter inlet is used for each fan 1, and the outlets of the adapters can share one, and cold air is sent to the bearing box 16 through the air supply duct 3 for cooling. The air supply duct 3 is connected with a bearing box 16 of the induced draft fan; conical rectifiers are arranged at the inlet of the bearing box 16 and the outlet of the air supply duct 3, so that the conveyed cold air keeps enough pressure and ideal streamline, and the kinetic energy loss is reduced.
An air outlet temperature detection unit 4 is arranged on the air supply duct 3; the air outlet temperature detection unit 4 is positioned close to the bearing box 16, so that more accurate measurement of the ambient temperature change near the bearing box 16 can be ensured, and once the first rated temperature is exceeded, the air cooling system of the induced draft fan shaft is fed back in time to realize air supply cooling;
the air outlet temperature detection unit 4 arranged on the air supply duct 3 is electrically connected with the air regulating valve 6 of the cooling circulation processing system in a signal feedback mode, when the controller receives signal feedback that the temperature exceeds the second rated temperature, the air regulating valve 6 receives an instruction of the controller and opens, the cooling circulation processing system is started, cooling air with lower temperature is conveyed, the rapid rise of the internal temperature of the bearing box 16 is controlled until the temperature is restored to the second rated working temperature range, and when the stable working is achieved, the output quantity of the cooling air is gradually reduced until the cooling circulation processing system is stopped; and when the temperature of the bearing box 16 is stably controlled within the first rated temperature, stopping the operation of the induced draft fan shaft air cooler system with the feedback signal.
A first duct 5 and a second duct 7 are provided in the air supply duct 3. The position of first pipeline 5 one end is located the rear of air outlet temperature detecting element 4, is close to fan 1 exit, nevertheless keeps a section distance with fan 1 exit, prevents mutual interference between the air current. An air regulating valve 6 is arranged on the first pipeline 5 to realize the control and regulation of the air inlet amount. The air regulating valve 6 can be a pneumatic control valve or a temperature control valve, and the opening of the valve body can realize gradient regulation along with the change of a temperature feedback signal received in the controller. The other end of the first pipe 5 is communicated with an air inlet of an air cooler 8.
One end of the second pipeline 7 is communicated with the air supply duct 3 close to the bearing box 16 and is positioned behind the air outlet temperature detection unit 4; the other end is communicated with an outlet of an air cooler 8, and low-temperature air cooled by the air cooler 8 is mixed with cold air in the original air supply duct 3 through a second pipeline 7 and is sent to a high-temperature area of the bearing box 16 for cooling.
The air cooler 8 is a core component of the cooling cycle processing system; the secondary cooling treatment is carried out on the natural air sent out by the fan 1, and lower low-temperature air conveying is realized, so that even in hot and high-temperature summer seasons, the low-temperature air conveyed after being treated by the air cooler 8 is much lower than the ambient temperature, and the temperature of the bearing box 16 is easily reduced.
The cooling circulation processing system also comprises a cooling water return valve 12, a cold water quantity regulating valve 10, a drainage door, a third pipeline 9 and a fourth pipeline 11;
one end of the third pipeline 9 is communicated with a cooling water inlet pipeline of the oil cooler 15 of the oil station, and the other end of the third pipeline is communicated with a cold water inlet of the air cooler 8, so that cooling water is introduced into the air cooler 8. On the third pipeline 9, a cold water quantity regulating valve 10 is further arranged, so that the water inflow of cooling water can be regulated according to the temperatures in different seasons, and the cooling water consumption of the air cooler 8 is ensured.
One end of the fourth pipeline 11 is communicated with a cooling water outlet pipeline of the oil cooler 15 of the oil station, and the other end of the fourth pipeline is communicated with a cold water outlet of the air cooler 8, so that water which is used for cooling the air in the air supply duct 3 in the air cooler 8 is collected on the water outlet pipeline of the oil cooler 15 of the oil station. A cooling water return valve 12 is further provided in the fourth pipe 11, and the amount of water discharged from the air cooler 8 can be adjusted.
Meanwhile, when the air cooler 8 needs to be cleaned or overhauled, the cold water quantity regulating valve 10 and the cooling water return valve 12 can be closed at the same time, so that the air cooler 8 is convenient to clean or overhaul.
In order to prevent the air cooler 8 from being disabled due to the fact that the cooling water is frozen due to too low temperature in winter, a drain valve 13 is additionally arranged on the fourth pipeline 11 and is not far away from the outlet of the air cooler 8, and the drain valve 13 can be opened in a low-temperature period to enable water to flow, so that the water in the pipeline is prevented from being frozen and even burst through the pipeline.
In winter, because the ambient temperature is lower, the ambient temperature is utilized to realize the high-temperature natural convection heat exchange with the box body of the bearing box 16 and the air supply of the bearing box air supply system of the draught fan, generally, one fan 1 can meet the use condition, the bearing box 16 can be basically ensured to be in the normal working temperature range, at this moment, the temperature of the bearing box 16 usually does not exceed the rated temperature and is very high, the cooling circulation processing system can not be started to further cool the air in the air supply air duct 3 temporarily, and the bearing box air supply system of the draught fan meets the cooling effect on the bearing box 16.
In the early and middle spring period, the temperature in the bearing box 16 box body rises along with the rise of outdoor temperature, the heat exchange environmental condition becomes worse, in the high-load operation process of the draught fan, the temperature reduction of the bearing box 16 box body is mainly realized by increasing the air supply quantity of an air supply system of the bearing box of the draught fan, namely, two or more fans 1 are usually used for simultaneously starting air supply to improve the high-temperature environment around the bearing box 16, more air quantity is used for replacing heat accumulated in the bearing box 16 box body to achieve rapid heat dissipation, and a mode of adding a cooling circulation processing system to a part of the fans can be adopted for conveying mixed low-temperature air to achieve rapid heat dissipation, so that the purpose of ensuring the stable operation of the bearing box 16 is also achieved.
In the middle and later periods of autumn, the outdoor temperature is in the process of changing from high to low, the temperature in the bearing box 16 box body is also improved along with the ambient temperature, the temperature cooling mode in the bearing box 16 box body is basically similar to the method adopted in spring, namely, two or more fans 1 are usually used for simultaneously starting air supply, the high-temperature environment around the bearing box 16 is improved, more air volume is used for replacing heat accumulated in the bearing box 16 box body to achieve rapid heat dissipation, and a mode of adding a cooling circulation processing system to a part of fans can be adopted for conveying mixed low-temperature air to achieve rapid heat dissipation, so that the purpose of ensuring the stable operation of the bearing box 16 is achieved.
In the period from late spring to early autumn, especially in the highest summer, the temperature in the bearing box 16 box body rises higher due to high ambient temperature, even if the two or more fans 1 are started to supply air at the same time, the high-temperature environment around the bearing box 16 is improved, the effect of replacing heat accumulated in the bearing box 16 box body by more air volume is not obvious, and the high-temperature working environment inside and outside the bearing box 16 is very severe. Often, in this period, the induced draft fan bearing box 16 cannot be discharged due to the heat generated by high temperature, so that the unit parts are seriously burnt and damaged, and even the high occurrence period of system shutdown accidents is caused. The reason that the heat in the bearing box 16 cannot be discharged in time due to the air supply of the bearing box air supply system of the induced draft fan is mainly two-sided, namely unbalanced air volume control of air supply and longer delay time. On the other hand, the temperature of the air sent by the bearing box air supply system of the induced draft fan is very high, the temperature difference between the air and the working high temperature in the bearing box 16 is too small, and the cooling requirement of the bearing box 16 cannot be met.
Aiming at the two points, an air outlet temperature detection unit 4 is additionally arranged at a position, close to a box body accessory of a bearing box 16, in an original air supply system of a draught fan bearing box, so that the air temperature change in the environment of the bearing box 16 in real time can be monitored, and a temperature signal is converted into a visual digital signal which can be identified by human eyes through a controller, so that the real-time monitoring of the air near the bearing box 16 is realized. Once the temperature rises rapidly, the temperature reduction measures can be taken in time. Meanwhile, signals fed back by the temperature sensors are processed by the controller, and one way can realize the linkage control of starting and stopping of the plurality of fans 1 at the downstream and the real-time adjustment of the wind speed of the fans 1. The air quantity sent by the air supply system of the bearing box of the induced draft fan is ensured to be supplemented in time and reach a stable state.
The signal fed back by the air outlet temperature detection unit 4 is processed by the controller, and the other path of the signal can realize the action on the air regulating valve 6 arranged on the first pipeline 5, so as to realize the opening and closing actions of the air regulating valve 6 and the regulation of the opening degree of the valve; because the cooling circulation processing system is communicated with the air supply air duct 3 of the bearing box air supply system of the draught fan through the first pipeline 5 and the second pipeline 7, the automatic starting, stopping and flow adjusting functions of the cooling circulation processing system are further realized. Through setting up cooling cycle processing system, can be in the time frame of spring end to autumn beginning, especially the hot high temperature in summer carries out the precooling processing with the natural temperature air that sends into the 16 boxes of bearing box, the air temperature that makes to send out is less than natural environment's temperature greatly, the air cooling guard action effect in the 16 boxes of bearing box is fine, greatly reduced leads to the radiating effect not good because of the inside and outside ambient temperature of bearing box 16 is too high, take place the part and burn out, the probability of shutting down even, be the favourable guarantee of the normal work of draught fan.
The air cooler 8 is the core of the cooling circulation processing system, the cooling effect of the air cooler 8 determines the low-temperature effect of the low-temperature cooling air, and further influences the stable working condition of the induced draft fan in severe temperature environment during the period from the end of spring to the early autumn when the environmental temperature is high; the air cooler 8 has various forms, and can be divided into a vertical type, a horizontal type or a circular ring type according to the arrangement form of the cooling pipes; the ventilation mode can be divided into an induced draft type, a blast type or a natural ventilation type; the cooling pipe can be divided into a fin type or a common light pipe type according to whether a heat dissipation structure is arranged on the cooling pipe or not; the selection can be considered according to factors such as site space, unit capacity, economic cost and the like.
The cooling circulation processing system using the air cooler 8 as the core deals with the continuous high temperature environment in a period, an ideal method for solving the problem of ultrahigh environment temperature in the bearing box 16 box body by reducing the air supply temperature can make the sent cooling air lower than the environment temperature, and improve the heat exchange efficiency by utilizing the temperature difference larger than the environment temperature in the bearing box 16, thereby reducing the air outlet temperature of the bearing box 16 and the surrounding, further reducing the air supply volume, being very favorable for the model selection of the fan 1, and avoiding the phenomenon of 'big horse drawing a trolley'.
In a cooling circulation processing system with an air cooler 8 as a core, the water temperature of cooling circulation water is also an important factor for controlling the temperature of supply air, and generally, on the premise that other conditions are not changed, part of cooling water branched from a cooling water system of an oil cooler 15 of an oil station is used for cooling supply air, and the greater the temperature difference between an inlet and an outlet of the cooling water is, the lower the temperature of cold water at a cooling water outlet is, and the lower the temperature of low-temperature air discharged after cooling at the outlet of the air cooler 8 is, so that cooling water which obtains a lower temperature in high-temperature summer can indirectly become one of factors for better cooling the ambient temperature in a bearing box 16. Moreover, the cooling water with lower temperature can better perform cooling heat exchange on the cooling lubricating oil in the oil cooler 15 of the oil station, the lower the temperature of the lubricating oil supplied to the bearing box 16 of the induced draft fan is, the lower the temperature of the environment in the bearing box 16 is, the better the heat accumulation can be improved, and the work of the whole machine is facilitated.
Similarly, a cooling water return valve 12 and a cooling water amount adjusting valve 10 are arranged on a third pipeline 9 and a fourth pipeline 11 at the inlet and the outlet of the air cooler 8, so that the ideal effect of cooling the air supply by taking away heat in the air supply as much as possible in unit time can be achieved by adjusting the flow rate of the cooling water, the quality of low-temperature cooling air conveyed to the bearing box 16 is improved, and the normal work of the bearing box 16 is ensured without overtemperature.
By arranging the air supply system of the bearing box of the induced draft fan, the running temperature of the bearing box 16 can be better monitored, so that reasonable cooling air supply actions can be performed; the air which is greatly lower than the working temperature of the bearing box 16 is sent into the bearing box 16 by utilizing the air supply system of the bearing box of the induced draft fan, so that the accumulation of internal heat is prevented, and the normal working state of the whole unit and the system is ensured.
By arranging the air outlet temperature detection unit 4 and the cooling circulation processing system on the air supply duct 3, firstly, an operator can visually detect the ambient temperature of the air supply duct 3 and adjust the operation conditions of the cooling circulation processing system and the air supply system of the fan bearing box in time; the system can automatically run when the system is unattended, so that the human resources are saved; secondly, the air supply temperature can be monitored in time through signal feedback of the air outlet temperature detection unit 4, and the air speed, pressure and cooling air flow of the air supply are adjusted in time according to the temperature, so that the whole air supply system of the bearing box of the draught fan is in a relatively stable state in real time, the adjustment precision is higher, and the running stability of the whole system is better; thirdly, compared with the cooling technology of the bearing box 16 of the existing induced draft fan, only the air outlet temperature detection unit 4, the air cooler 8 and related pipelines and valves are added, the construction and installation method is simple, the cooling circulating water used by the air cooler 8 can be combined with the oil cooler 15 of the oil station of the original system for use, the air and the inlet and outlet can be directly branched from the air supply duct 3 for access, and the investment cost is low; finally, by using the device, the situation that the induced draft fan works in a severe temperature environment in the period of high environmental temperature from the end of spring to the beginning of autumn is greatly improved, the accident rate of the whole unit in a high risk period and a high economic demand period is reduced, and the brought economic results are very considerable.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. The utility model provides a cold system of automatic control formula induced fan axle which characterized in that: the cooling system comprises an induced draft fan bearing box air supply system, a cooling circulation processing system and a controller;
draught fan bearing box air supply system includes: the air conditioner comprises a fan, an air supply duct and an air outlet temperature detection unit;
one end of the air supply duct is connected with the fan, the other end of the air supply duct is connected with a bearing box of the induced draft fan, and the air outlet temperature detection unit is positioned on the air supply duct and is electrically connected with the controller;
the cooling circulation processing system comprises: the air cooler comprises an air inlet, an air outlet, a refrigerant inlet and a refrigerant outlet;
a first pipeline is arranged between the air inlet and the outlet of the fan, and a second pipeline is arranged between the air outlet and the air supply duct;
a third pipeline and a fourth pipeline are respectively arranged between the refrigerant inlet and the refrigerant outlet and the refrigerant supply system;
and the controller controls the cooling circulation processing system to be opened and closed according to the detection result of the air outlet temperature detection unit.
2. The self-controlled fan shaft cooling system of claim 1, wherein: the air outlet temperature detection unit is close to the bearing box of the induced draft fan and is positioned near the outlet end of the air supply duct.
3. The self-controlled fan shaft cooling system of claim 1, wherein: the air flow control device also comprises an air adjusting valve used for adjusting the air flow entering the cooling circulation processing system, and the air adjusting valve is arranged on the first pipeline.
4. The self-controlled fan shaft cooling system of claim 3, wherein: the air regulating valve is electrically connected with the controller, and the controller controls the flow of the air regulating valve according to the detection result of the air outlet temperature detection unit.
5. The self-controlled fan shaft cooling system of claim 1, wherein: still include cold water volume governing valve, cold water volume governing valve sets up on the third pipeline.
6. The self-controlled fan shaft cooling system of claim 1, wherein: still include cooling water return valve, cooling water return valve sets up on the fourth pipeline.
7. The self-controlled fan shaft cooling system of claim 1, wherein: the water drain valve is arranged on the fourth pipeline and is positioned between the cooling water return valve and the air cooler.
8. The self-controlled fan shaft cooling system of claim 1, wherein: the refrigerant supply system is a cooling water system guided by a cooling system of an oil cooler of the oil station.
9. The self-controlled fan shaft cooling system of claim 1, wherein: the air supply control valve is arranged on the air supply air channel and is positioned between the first pipeline and the second pipeline.
10. The self-controlled fan shaft cooling system of claim 1, wherein: the fans are cooling sources of the draught fan shaft air cooler system, at least two fans are provided, and the fans are connected with the connector in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120936895.5U CN214742229U (en) | 2021-04-30 | 2021-04-30 | Self-control type draught fan shaft cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120936895.5U CN214742229U (en) | 2021-04-30 | 2021-04-30 | Self-control type draught fan shaft cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117348452A (en) * | 2023-11-03 | 2024-01-05 | 东营市胜凯石化设备有限公司 | Energy-saving control system of petroleum refining air cooler |
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2021
- 2021-04-30 CN CN202120936895.5U patent/CN214742229U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117348452A (en) * | 2023-11-03 | 2024-01-05 | 东营市胜凯石化设备有限公司 | Energy-saving control system of petroleum refining air cooler |
| CN117348452B (en) * | 2023-11-03 | 2024-03-12 | 东营市胜凯石化设备有限公司 | Energy-saving control system of petroleum refining air cooler |
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