CN115899668A - Water supply and classification steam system for boiler of cigarette factory - Google Patents

Abstract

The invention discloses a water supply and classification steam utilization system of a boiler in a cigarette factory, wherein a first steam supply unit comprises a first boiler and a first steam dividing cylinder, the first boiler can supply steam for the first steam dividing cylinder, and the first steam dividing cylinder is connected with a first steam utilization unit; the second steam supply unit comprises a second boiler and a second steam distributing cylinder, the second boiler can supply power for the second steam distributing cylinder, the second steam distributing cylinder is connected with the second steam unit, and a pressure reducing valve is arranged between the second steam distributing cylinder and the second steam unit; the first cylinder and the second cylinder are communicated, and a valve is arranged between the first cylinder and the second cylinder; when one of the first steam supply unit or the second steam supply unit fails, a valve between the first steam distribution cylinder and the second steam distribution cylinder is opened, the first steam distribution cylinder is communicated with the second steam distribution cylinder, and the first steam supply unit or the second steam supply unit supplies steam to the first steam utilization unit and the second steam utilization unit simultaneously. The boiler of the invention can be operated independently and can be operated in a cross way when in failure, and can effectively cope with emergency situations.

Description

Water supply and classification steam system for boiler of cigarette factory

Technical Field

The invention relates to the technical field of steam supply of industrial boilers, in particular to a water supply and classified steam supply system for a boiler of a cigarette factory.

Background

At present, cigarette enterprise's tradition steam supply mode all supplies a steam-distributing cylinder for the steam of two or many boilers, and rethread pipeline supplies vapour in unison, and two boiler operating pressure are the same like this, and two boilers also mend water in unison to carry out heating power deoxidization to all deaerators simultaneously, energy resource consumption is big, and the boiler drainage is frequent, and the discharge is great. And the cigarette enterprises are provided with steam consuming equipment heated by steam, the steam consuming equipment is heated by the steam to become condensed water, and the condensed water can be recovered. There are also steam consuming devices for steam humidification, where the steam used for humidification is consumed and no condensed water or condensed water is recovered. Some high pressure steam equipment in the heating steam has the discontinuity like vacuum conditioning steam, and the volume of using steam is great, because equipment is far away from boiler room distance, increases the gas consumption when steam equipment, and steam pipe network pressure reduces, lags behind when needing the boiler to increase load, and the boiler can't produce sufficient steam steady pressure in the short time to lead to steam fluctuation very often, lead to the boiler short-time even to supply vapour not enough, influence product quality.

Therefore, how to provide a boiler water supply and steam classification system of a cigarette factory, which has scientific and reasonable design and is suitable for actual production requirements, becomes a technical problem to be solved urgently in the field.

Disclosure of Invention

The invention aims to provide a water supply and classification steam system of a cigarette factory boiler, which has scientific and reasonable design and is suitable for actual production requirements.

According to a first aspect of the invention, a system for supplying water and classifying steam to a boiler of a cigarette factory is provided, which comprises a first steam supply unit, a second steam supply unit, a first steam unit and a second steam unit; the first steam supply unit comprises a first boiler and a first steam dividing cylinder, the first boiler can supply steam for the first steam dividing cylinder, and the first steam dividing cylinder is connected with the first steam supply unit; the second steam supply unit comprises a second boiler and a second steam distributing cylinder, the second boiler can supply power for the second steam distributing cylinder, the second steam distributing cylinder is connected with the second steam unit, and a pressure reducing valve is arranged between the second steam distributing cylinder and the second steam unit; the first cylinder distributor is communicated with the second cylinder distributor, and a valve is arranged between the first cylinder distributor and the second cylinder distributor; when the first steam supply unit and the second steam supply unit both operate normally, a valve between the first steam distribution cylinder and the second steam distribution cylinder is closed, and a passage between the first steam distribution cylinder and the second steam distribution cylinder is disconnected; when one of the first steam supply unit or the second steam supply unit fails, a valve between the first steam dividing cylinder and the second steam dividing cylinder is opened, the first steam dividing cylinder is communicated with the second steam dividing cylinder, and the first steam supply unit or the second steam supply unit supplies steam to the first steam unit and the second steam unit simultaneously.

Optionally, the system further comprises a first deaerator and a second deaerator; boiler water of the first boiler can enter the first boiler through the first deaerator; boiler water of the second boiler can enter the second boiler through the second deaerator; and the second branch cylinder is respectively communicated with the first deaerator and the second deaerator and is used for heating boiler water in the first deaerator and the second deaerator.

Optionally, the system further comprises a first pump stack; the first deaerator with the intercommunication has the water supply pipe between the second deaerator, be provided with first check valve on the water supply pipe, boiler water accessible in the second deaerator first pump package warp the water supply pipe and pass through the first deoxidization head of first deaerator gets into first deaerator.

Optionally, a steam supply pipeline is communicated between the first deaerator and the second deaerator, a second check valve is arranged on the steam supply pipeline, and steam in the first deaerator can enter the second deaerator through the steam supply pipeline.

Optionally, the system further comprises a second pump set; a first liquid level sensor is arranged in the first deaerator, and a second liquid level sensor is arranged in the second deaerator; when the first liquid level sensor detects that the water level in the first deaerator reaches a preset value, water in the first deaerator can be pumped into the second deaerator through the second pump group; and when the second liquid level sensor detects that the water level in the second deaerator is lower than a preset value, replenishing water to the second deaerator.

Optionally, a first temperature sensor and a first pressure sensor are arranged in the first deaerator, and a second temperature sensor and a second pressure sensor are arranged in the second deaerator; when the temperature in the first deaerator or the second deaerator is detected to be less than or equal to 100 ℃, the second steam distributing cylinder heats the first deaerator and the second deaerator; when the temperature in the first deaerator and/or the second deaerator is detected to be higher than 100 ℃ and the pressure in the first deaerator or the second deaerator is detected to be higher than a preset value, the first pressure sensor and/or the second pressure sensor transmit signals to an electric valve of the first deaerator or the second deaerator, and the first deaerator and/or the second deaerator are/is decompressed to adjust the temperature.

Optionally, the system further comprises a boiler controller and a sensor, wherein the sensor is in signal connection with the boiler controller; the first steam unit and the second steam unit are respectively connected with the sensor; the boiler controller may control the power of the first boiler and the second boiler; when the first steam unit and the second steam unit need to use steam, the sensor sends a signal to the corresponding boiler in advance according to the length of a pipeline between the gas-using equipment and the boiler and the steam flow rate, and the boiler receives the signal and increases the operation load in advance according to the steam consumption to be increased suddenly.

Optionally, the system further comprises a cylinder trap; the first branch cylinder and the second branch cylinder are respectively connected with one cylinder drain valve; and the condensed water generated by the first branch cylinder and the second branch cylinder is discharged into the first deaerator through the drain valve.

Optionally, the system further comprises a pipeline trap; a pipeline drain valve is arranged on a steam supply pipeline between the first steam distributing cylinder and the first steam unit, and condensed water in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve; and/or the steam supply pipeline between the second steam distributing cylinder and the second steam unit is provided with the pipeline drain valve, and condensed water in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve.

Optionally, the drained water of the first boiler can be directly drained into the second deaerator, an electric valve is arranged between the first boiler and the second deaerator, and the electric valve controls the on-off of the drained water of the first boiler to the second deaerator.

According to the technical content disclosed by the invention, the following beneficial effects are achieved:

the steam generated by the two boilers is classified and utilized according to the steam consumption equipment, so that the two boilers can separately and independently operate, the operating pressure can be consistent or inconsistent, the two boilers can be mutually standby, a set of steam supply system does not need to be newly added with softened water under the normal condition, a deaerator for supplying water to the boilers by the set of system does not need to be heated and deaerated, the drainage of the boilers can be directly recycled, the load of the boilers can be increased in advance to meet the steam consumption requirement before the steam consumption of the steam consumption equipment is increased, the insufficient steam supply pressure is prevented, the production is guaranteed, and energy is saved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a first portion of a schematic diagram of a cigarette factory boiler feed water and steam classification system according to an embodiment.

FIG. 2 is a second portion of a schematic diagram of a cigarette factory boiler feedwater and steam staging system according to an embodiment.

Detailed Description

Respective exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Referring to fig. 1 and 2, according to a first aspect of the present invention, there is provided a water supply and steam classification system for a boiler of a cigarette factory, comprising a first steam supply unit, a second steam supply unit, a first steam unit and a second steam unit; the first steam supply unit comprises a first boiler 10 and a first steam divider 33, the first boiler 10 can be the first steam divider 33, and the first steam divider 33 is connected with the first steam supply unit; the second steam supply unit comprises a second boiler 6 and a second steam distributing cylinder 36, the second boiler 6 can supply steam for the second steam distributing cylinder 36, the second steam distributing cylinder 36 is connected with the second steam unit, and a pressure reducing valve is arranged between the second steam distributing cylinder 36 and the second steam unit; the first branch cylinder 33 is communicated with the second branch cylinder 36, and a valve is arranged between the first branch cylinder 33 and the second branch cylinder 36; when the first steam supply unit and the second steam supply unit are both in normal operation, the valve between the first branch cylinder 33 and the second branch cylinder 36 is closed, and the passage between the first branch cylinder 33 and the second branch cylinder 36 is disconnected; when one of the first steam supply unit or the second steam supply unit fails, a valve between the first steam dividing cylinder 33 and the second steam dividing cylinder 36 is opened, the first steam dividing cylinder 33 is communicated with the second steam dividing cylinder 36, and the first steam supply unit or the second steam supply unit simultaneously supplies steam to the first steam supply unit and the second steam supply unit.

Further, the system also includes a first deaerator 98 and a second deaerator 133; the boiler water of the first boiler 10 can enter the first boiler 10 through the first deaerator 98; the boiler water of the second boiler 6 can enter the second boiler 6 through the second deaerator 133; the second branch cylinder 36 is respectively communicated with the first deaerator 98 and the second deaerator 133, and heats the boiler water in the first deaerator 98 and the second deaerator 133.

Further, the system further includes a first pump group 137; a water supply pipeline is communicated between the first deaerator 98 and the second deaerator 133, a first check valve 105 is arranged on the water supply pipeline, and boiler water in the second deaerator 133 can enter the first deaerator 98 through the first pump set 137 via the water supply pipeline and through a first deaerating head 115 of the first deaerator 98.

Further, a steam supply pipeline is communicated between the first deaerator 98 and the second deaerator 133, a second check valve 120 is arranged on the steam supply pipeline, and steam in the first deaerator 98 can enter the second deaerator 133 through the steam supply pipeline.

Further, the system also comprises a second pump stack 102; a first liquid level sensor 111 is arranged in the first deaerator 98, and a second liquid level sensor 130 is arranged in the second deaerator 133; when the first liquid level sensor 111 detects that the water level in the first deaerator 98 reaches a preset value, water in the first deaerator 98 can be pumped into the second deaerator 133 through the second pump group 102; when the second liquid level sensor 130 detects that the water level in the second deaerator 133 is lower than a preset value, water is replenished to the second deaerator 133.

Further, a first temperature sensor 112 and a first pressure sensor 113 are arranged in the first deaerator 98, and a second temperature sensor 129 and a second pressure sensor 128 are arranged in the second deaerator 133; when the temperature in the first deaerator 98 or the second deaerator 133 is detected to be less than or equal to 100 ℃, the second branch cylinder 36 heats the first deaerator 98 and the second deaerator 133; when the temperature in the first deaerator 98 and/or the second deaerator 133 is detected to be higher than 100 ℃ and the pressure in the first deaerator 98 or the second deaerator 133 is detected to be higher than a preset value, the first pressure sensor 113 and/or the second pressure sensor 128 transmit signals to an electric valve of the first deaerator 98 or the second deaerator 133, and the first deaerator 98 and/or the second deaerator 133 are/is depressurized to adjust the temperature.

Further, the system also comprises a boiler controller 1 and a sensor, wherein the sensor is in signal connection with the boiler controller 1; the first steam unit and the second steam unit are respectively connected with the sensor; the boiler controller 1 may control the operating power of the first boiler 10 and the second boiler 6; when the first steam unit and the second steam unit need to use steam, the sensor sends a signal to the corresponding boiler in advance according to the length of a pipeline between the gas-using equipment and the boiler and the steam flow rate, and the boiler receives the signal and increases the operation load in advance according to the steam consumption to be increased suddenly.

Further, the system also includes a cylinder trap; the first branch cylinder 33 and the second branch cylinder 36 are respectively connected with one cylinder drain valve; the condensed water generated by the first cylinder divider 33 and the second cylinder divider 36 is discharged into the first deaerator 98 through the drain valve.

Further, the system also includes a pipeline trap; the steam supply pipeline between the first steam distributing cylinder 33 and the first steam using unit is provided with the pipeline drain valve, and condensed water in the steam supply pipeline is discharged into the first deaerator 98 through the pipeline drain valve; and/or the steam supply pipeline between the second steam distributing cylinder 36 and the second steam unit is provided with the pipeline drain valve, and the condensed water in the steam supply pipeline is discharged into the first deaerator 98 through the pipeline drain valve.

Further, the drainage of the first boiler 10 may be directly discharged into the second deaerator 133, and an electric valve is disposed between the first boiler 10 and the second deaerator 133, and the electric valve controls the on/off of the drainage of the first boiler 10 to the second deaerator 133.

Specifically, the method comprises the following steps:

the overall process flow is as follows: normally, the steam generated by the first boiler 10 enters the first steam splitter 33, and the first steam splitter 33 supplies the steam to the first steam consuming device 83 and the second steam consuming device 68 for utilization. The condensed water generated by the steam-distributing cylinder, the pipe network and the steam-consuming equipment all flows back to the first deaerator 98, the water of the first deaerator 98 is supplied to the first boiler 10, and the steam generated by the first boiler 10 is supplied to the first steam-consuming equipment 83 and the second steam-consuming equipment 68 for utilization. Like this reciprocating cycle, because the steam that first steam equipment 83 and second steam equipment 68 utilized all becomes the condensate water and all retrieves into first oxygen-eliminating device 98 and recycles, consequently, form closed circulation system between first oxygen-eliminating device 98, first boiler 10 and first steam equipment 83, second steam equipment 68, and first oxygen-eliminating device 98 of this system need not the moisturizing, also need not thermal power deoxidization, practices thrift steam and water. Even when the water level of the first deaerator 98 with more condensed water is high, the excessive water in the first deaerator 98 can enter the second deaerator 133, so that the water supplement of the second deaerator 133 is reduced. Due to the closed cycle, the water discharged from the first boiler 10, because it is relatively good, may also be discharged into the second deaerator 133, and finally discharged only through the second boiler 6. And the steam generated by the second boiler 6 enters the second steam header 36, and the second steam header 36 supplies the steam to the third steam consuming device 46, the fourth steam consuming device 63, the first deaerator 98 and the second deaerator 133 for use, so that the steam is completely consumed and used as the humidifying steam for the third steam consuming device 46 and the fourth steam consuming device 63 and the heating deaerating steam for the first deaerator 98 and the second deaerator 133 do not generate condensed water, and the second deaerator 133 needs to continuously supplement softened water and continuously perform thermal deaerating and adopt steam heating, so that a flowing process that the soft water supplements the second deaerator 133, the second deaerator 133 supplies water to the second boiler 6, and the steam generated by the second boiler 6 is used by the third steam consuming device 46 and the fourth steam consuming device 63 is sequentially formed. Because the distance of the steam conveying pipeline is long, the fluctuation of part of steam consuming equipment is large, and sensors are arranged on the steam consuming equipment, so that the load of the boiler is prevented from increasing after the load is increased, the steam consuming equipment suddenly increases the steam consumption, the sensors send signals to the boiler in advance before the steam consuming equipment uses steam, the load of the boiler is automatically and properly increased, and the sudden reduction of the pressure of a steam pipe network is avoided.

The detailed process of steam utilization is as follows:

the steam generated by the first boiler 10 enters the first steam consuming device 83 through the first valve 13, the first pipeline 14, the second pipeline 15, the third pipeline 17 and the second valve 16, the steam of the first steam consuming device 33 can be heated and utilized by the first steam consuming device 83 through the third valve 18, the fourth pipeline 19, the fifth pipeline 77, the sixth pipeline 78 and the fourth valve 79, and the steam of the first steam consuming device 33 can also be heated and utilized by the second steam consuming device 68 through the fifth valve 20, the seventh pipeline 21, the eighth pipeline 76, the ninth pipeline 73 and the sixth valve 72. Steam generated by the second boiler 6 enters the second steam-dividing cylinder 36 through the seventh valve 7, the tenth pipeline 8, the eleventh pipeline 39, the twelfth pipeline 41 and the eighth valve 40, the steam of the second steam-dividing cylinder 36 can be supplied to the third steam-consuming device 46 for use through the ninth valve 31, the thirteenth pipeline 32, the fourteenth pipeline 52, the first pressure reducing valve 53 and the tenth valve 54, the steam of the second steam-dividing cylinder 36 can be supplied to the fourth steam-consuming device 63 for use through the eleventh valve 29, the fifteenth pipeline 30, the sixteenth pipeline 57, the second pressure reducing valve 58 and the twelfth valve 59, the steam of the second steam-dividing cylinder 36 can be supplied to the first steam-consuming device 97 for heating the boiler feed water through the thirteenth valve 27, the seventeenth pipeline 28, the eighteenth pipeline 90 and the third pressure reducing valve 91 respectively, and then enters the first muffler 97 through the nineteenth pipeline 92 and the first electric valve 96 for heating the boiler feed water through the first deaerator can be supplied to the second muffler 133 through the twentieth pipeline 117, the twenty first deaerating pipeline 122 and the second muffler 135 for heating the boiler feed water through the second deaerating pipeline 133.

As can be seen from the above, in a normal situation, the first boiler 10 and the second boiler 6 respectively supply steam to different steam consuming devices, the front end pipelines of the first steam consuming device 83 and the second steam consuming device 68 for supplying steam generated by the first boiler 10 are not provided with a pressure reducing valve, and the front end pipelines of the third steam consuming device 46 and the fourth steam consuming device 63 for supplying steam generated by the second boiler 6 and the front end pipelines of the first deaerator 98 and the second deaerator 133 are respectively provided with the first pressure reducing valve 53, the second pressure reducing valve 58 and the third pressure reducing valve 91, so that the first boiler 10 and the second boiler 6 can adopt the same working pressure, and also can adopt different working pressures, that is, while the first boiler 10 operates at a high pressure to supply steam to the first steam consuming device 83 and the second steam consuming device 68, the second boiler 6 can operate at a high pressure, and then operates at a reduced pressure through the first pressure reducing valve 53, the second pressure reducing valve 58 and the third deaerator 133, and then operates at a high pressure to supply steam consuming device 46, the fourth steam consuming device 63, the first boiler 10, the second deaerator 133 to directly supply energy to the first deaerator device 46 and the second deaerator 133. And the first boiler 10 and the second boiler 6 can be used as a backup for each other, because the communication pipe and the valve are installed between the first branch cylinder 33 and the second branch cylinder 36, if the first boiler 10 fails and cannot operate, the second boiler 6 operates at high pressure, steam in the second branch cylinder 36 can enter the first branch cylinder 33 through the fourteenth valve 25, the twenty-second pipe 26, the twenty-third pipe 24, the twenty-fourteenth pipe 23 and the fifteenth valve 22, and the steam in the first branch cylinder 33 can be used by the first steam consuming device 83 and the second steam consuming device 68. Similarly, if the second boiler 6 fails to operate, when the first boiler 10 operates at a high pressure, the steam in the first branch cylinder 33 may enter the second branch cylinder 36 through the fifteenth valve 22, the twenty-fourth pipeline 23, the twenty-third pipeline 24, the twenty-second pipeline 26 and the fourteenth valve 25, and then be decompressed by the first decompression valve 53, the second decompression valve 58 and the third decompression valve 91, and then be used by the third steam consuming equipment 46, the fourth steam consuming equipment 63, the first deaerator 98 and the second deaerator 133. Therefore, the method is not only flexible and reliable, but also saves energy.

The concrete process of condensate water recovery and boiler drainage comprises the following steps: the condensed water generated by the first steam-dividing cylinder 33 enters the pipeline 38 through the first steam trap 34, and the condensed water generated by the second steam-dividing cylinder 36 also enters the twenty-fifth pipeline 38 through the second steam trap 37, and then enters the thirtieth pipeline 82 through the twenty-sixth pipeline 44, the twenty-seventh pipeline 45, the twenty-eighth pipeline 62 and the twenty-ninth pipeline 67; condensed water generated on the pipelines for supplying steam to the third steam consuming device 46 and the fourth steam consuming device 63 respectively enters the twenty-eighth pipeline 62 through the steam trap 42, the pipeline 43 and the twenty-seventh pipeline 45, and enters the thirty-eighth pipeline 82 through the third steam trap 50 and the thirty-first pipeline 51 and then enters the thirty-ninth pipeline 67; the condensed water produced on the pipes supplying steam to the second steam consuming equipment 68 and the first steam consuming equipment 83 respectively enters the thirtieth pipe 82 through the fourth steam trap 55, the thirty-second pipe 56, the thirty-third pipe 65, the twenty-ninth pipe 67 and the fifth steam trap 74, the thirty-fourth pipe 75 and the thirty-fifth pipe 80, and the condensed water directly produced by the second steam consuming equipment 68 and the first steam consuming equipment 83 also enters the thirtieth pipe 82 through the sixth steam trap 66, the thirty-third pipe 65, the twenty-ninth pipe 67, the seventh steam trap 81 and the thirty-fifth pipe 80. Condensed water generated by each steam-separating cylinder, pipeline and steam-consuming equipment collected in the thirtieth pipeline 82 enters the first deaerator 115 through the thirty-sixth pipeline 87, the thirty-seventh pipeline 89, the thirty-eighth pipeline 94 and the thirty-ninth pipeline 95 and then falls into the first deaerator 98. Like this, the amount of condensate water of retrieving in the first oxygen-eliminating device 98 may be greater than the water consumption of first boiler 10, install first level sensor 111 on the first oxygen-eliminating device 98, when first level sensor 111 detected the water level of first oxygen-eliminating device 98 higher, unnecessary water just passes through forty pipelines 101 in the first oxygen-eliminating device 98, second pump package 102, forty first pipeline 103, forty second pipeline 107, forty third pipeline 109, forty-fourth pipeline 108 gets into second muffler 136, get into second oxygen-eliminating device 133 from second muffler 136, thereby reduce the moisturizing of second oxygen-eliminating device 133. Because the circulation system that forms between first oxygen-eliminating device 98, first boiler 10 and first steam consuming equipment 83, second steam consuming equipment 68, make-up water just when first oxygen-eliminating device 98 and first boiler 10 phase begin to use water or the system leaks seriously and leads to the system water yield not enough, the water that supplyes in the normal operating system at ordinary times is the comdenstion water that each steam consuming equipment, steam-distributing cylinder, pipeline produced, comdenstion water quality is pure and does not contain impurity and oxygen almost, first oxygen-eliminating device 98 need not to supply demineralized water, more need not steam heating and come the thermal power deoxidization, therefore this system not only water conservation, more practice thrift steam. Because the system is pure in water quality, sometimes the first boiler 10 discharges water, the first boiler 10 can discharge water through the third electric valve 9, the forty-fifth pipeline 144, the forty-sixth pipeline 141, the forty-second pipeline 107, the forty-third pipeline 109 and the forty-fourth pipeline 108 to enter the second silencer 136, and then the water enters the second deaerator 133 from the second silencer 136, thereby saving hot water, reducing the supplement of softened water by the second deaerator 133, mostly supplying water to the second boiler 6, newly feeding softened water after deaerating, and directly discharging the water discharged from the second boiler 6 through the electric valve 5 and the water discharge pipe 5.

The water replenishing and deaerator heating and deaerating process of the system comprises the following steps: the second deaerator 133 is provided with a second liquid level sensor 130, when the second liquid level sensor 130 detects that the liquid level of the second deaerator 133 is low, softened water enters the second deaerator head 125 through the pipeline 127 and the fourth electric valve 126, and then falls into the second deaerator 133 from the second deaerator head 125, and the softened water of the second deaerator 133 can enter the second boiler 6 through a forty-seventh pipeline 134, a first pump group 137, a forty-eighth pipeline 142, a forty-ninth pipeline 143 and the fifth electric valve 12. When the first deaerator 98 runs for the first time or the system leaks water and needs water replenishing, the liquid level meter detects that the liquid level of the first deaerator 98 is low, water of the second deaerator 133 can enter the first deaerator 115 through the forty-seventh pipeline 134, the first pump group 137 and then the fifty-fifth pipeline 104, the first check valve 105, the flowmeter 106 and the sixth electric valve 114, and then falls into the first deaerator 98 from the first deaerator 115. At this time, only when the sixth water replenishing electric valve 114 is opened to replenish softened water to the first deaerator 98, the first deaerator 98 performs thermal deaerating, that is, the first electric valve 96 is heated to be opened, and steam enters the first silencer 97 through the nineteenth pipeline 92 and the first electric valve 96 to perform deaerating after passing through the thirteenth valve 27, the seventeenth pipeline 28, the eighteenth pipeline 90 and the third pressure reducing valve 91 from the second steam distributing cylinder 36. Because the first deaerator 98 recovers a large amount of condensed water and the temperature of the condensed water may be high, when the flash steam or the hot steam discharged during the thermal deaerating of the first deaerator 98 enters the second silencer 136 from the first deaerator 115 through the fifty-first pipeline 116, the second check valve 120, the fifty-second pipeline 110 and the forty-fourth pipeline 108, and then enters the second deaerator 133 from the second silencer 136 to heat the softened water therein, so that the energy is saved.

The heating control mode of the deaerator is as follows: when the deaerator is heated, the deaerator adopts a temperature control mode when the temperature is lower than 100 ℃, and is switched into a pressure control mode when the temperature is higher than 100 ℃. Because the second deaerator 133 continuously replenishes softened water, when the second deaerator 133 performs thermal deaerating, the heating second electric valve 123 is opened, steam also enters the second muffler 135 from the second branch cylinder 36 through the thirteenth valve 27, the seventeenth pipeline 28, the eighteenth pipeline 90 and the third pressure reducing valve 91 to heat the softened water of the second deaerator 133 through the twentieth pipeline 117, the twenty-first pipeline 122 and the second electric valve 123 to perform thermal deaerating, and when the thermal deaerating is the most thorough, the temperature must reach more than 100 ℃, and hot gas in the second deaerator 133 carrying oxygen overflowing from the water is discharged into the atmosphere from the second deaerator 125 through the diffusing pipe 124. Because the temperature of water has a heating process when the deaerator is used for thermal deaerating, the deaerator is used for temperature control when no pressure exists in the deaerator, and the deaerator is switched into a pressure control mode when the deaerator has the pressure. The second deaerator 133 is provided with a second temperature sensor 129 and a second pressure sensor 128, the first deaerator 98 is also provided with a first temperature sensor 112 and a first pressure sensor 113, when the deaerating temperature of the second deaerator 133 or the first deaerator 98 is lower than 100 ℃, the second temperature sensor 129 and the first temperature sensor 112 respectively detect the temperature signals of the second deaerator 133 or 98 and send the temperature signals to the fourth electric valve 126 and the sixth electric valve 114, and the temperature sensors respectively control the temperature of the second deaerator 133 and the temperature of the first deaerator 98. When the temperature of the deaerator is higher than 100 ℃, that is, steam and saturated water which are higher than the atmospheric pressure exist in the deaerator, control signals of the electric valves are switched, that is, pressure signals are respectively sent to the fourth electric valve 126 and the sixth electric valve 114 through the second pressure sensor 128 and the first pressure sensor 113 to respectively control the pressure of the second deaerator 133 and the pressure of the first deaerator 98.

The control flow for preventing the pressure fluctuation of the steam pipe network system is as follows: because the steam consuming equipment is far away from the boiler, the steam conveying pipeline is long, and the steam consuming equipment has discontinuity and discontinuity, and the steam consumption is sudden and big, and the volume of using steam increases suddenly and can cause pipe network pressure to reduce, supplies vapour not enough, even takes out low boiler water level in the twinkling of an eye and leads to the boiler low water level to shut down. Therefore, the first sensor 48 is installed on the third steam consuming device 46, the second sensor 60 is installed on the fourth steam consuming device 63, the third sensor 70 is installed on the second steam consuming device 68, the fourth sensor 85 is installed on the first steam consuming device 83, the first sensor 48, the second sensor 60, the third sensor 70 and the fourth sensor 85 are respectively transmitted to the boiler controller 1 through the first transmission line 49, the second transmission line 61, the third transmission line 71 and the fourth transmission line 86, and then sequentially pass through the fifth transmission line 47, the sixth transmission line 64, the seventh transmission line 69, the eighth transmission line 84, the ninth transmission line 88, the tenth transmission line 131 and the eleventh transmission line 139, and the boiler controller 1 can respectively control the first boiler 10 through the twelfth transmission line 11 or control the second boiler 6 through the thirteenth transmission line 2. When a certain steam consuming device is about to reach a certain process flow or link due to process requirements, namely steam is about to be used, a sensor arranged on the steam consuming device sends a signal to a corresponding boiler in advance according to the length of a pipeline between the steam consuming device and the boiler, the flow rate of the steam and the like, the boiler receives the signal and properly increases the operation load in advance according to the steam consumption to be suddenly increased, so that when the steam consuming device uses the steam, a pipe network for supplying the steam to the steam consuming device supplies redundant steam to the steam consuming device, the pressure of a pipe network system is not limited by sudden increase of the steam consumption to cause sudden reduction of the steam pressure of the pipe network, and even the production is influenced by short-term shortage of the steam supply or low-water-level shutdown of the boiler. Similarly, the heating electric motor 123 of the second deaerator 133 and the heating first electric motor 96 of the first deaerator 98 are also connected to a fourteenth transmission line 121 and a fifteenth transmission line 93, respectively, signals of the second electric motor 123 and the first electric motor 96 are transmitted to the boiler controller 1 through a sixteenth transmission line 118, a seventeenth transmission line 119, an eighteenth transmission line 132 and a nineteenth transmission line 140, and the boiler controller 1 can also control the first boiler 10 through a twelfth transmission line 11 or the second boiler 6 through a thirteenth transmission line 2, respectively.

The invention supplies the steam generated by the first boiler to the equipment needing steam heating, and the second boiler supplies the steam to the equipment needing steam humidifying, and the pressure of the steam for humidifying is low, so that the first boiler operates at high pressure, and the second boiler can operate at low pressure at the same time. However, the two steam supply systems are provided with communicating pipelines and valves, and if one boiler fails, the other boiler can supply steam to all the devices. Boiler water supply process does, all firing equipment, the pipeline, first oxygen-eliminating device is retrieved all to the comdenstion water that steam condensate such as gas-distributing cylinder produced, first oxygen-eliminating device supplies water for first boiler, because first oxygen-eliminating device retrieves the comdenstion water, and the comdenstion water is retrieved in a large number after the steam heating that first boiler produced, therefore, first oxygen-eliminating device, boiler and steam consuming equipment form closed circulation system, and this system need not supply new water basically, the boiler is given water and just need heating deoxidization, energy saving, only first operation, leak or special cases etc. just need the moisturizing, because the water that gives of first boiler all is continuous operation, water all passes through the evaporation condensation, boiler impurity is less, boiler drainage can direct utilization, thereby energy saving. The second deaerator supplies water to the second boiler and the first deaerator, and because steam generated by the second boiler is used for humidifying, only the second deaerator needs to continuously supplement new water and perform thermal deaerating. The invention also provides a method for monitoring the starting time and the ending time of the steam for the steam equipment, in particular to equipment with larger intermittent instantaneous steam consumption.

In conclusion, the steam generated by the two boilers is classified and utilized according to the steam consumption equipment, so that the two boilers can separately and independently operate, the operating pressure can be consistent or inconsistent, the two boilers can be mutually standby, a set of steam supply system does not need to be newly added with softened water under the normal condition, a deaerator for supplying water to the boilers by the set of system does not need to be heated and deaerated, the boiler drainage can be directly recycled, the load can be early warned to increase the load of the boilers in advance before the steam consumption of the steam consumption equipment is increased to meet the steam consumption requirement, the insufficient steam supply pressure is prevented, the production is guaranteed, and the energy is saved.

Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A system for supplying water and classifying steam to a boiler of a cigarette factory is characterized by comprising:

the system comprises a first steam supply unit, a second steam supply unit, a first steam unit and a second steam unit;

the first steam supply unit comprises a first boiler and a first steam dividing cylinder, the first boiler can supply steam for the first steam dividing cylinder, and the first steam dividing cylinder is connected with the first steam supply unit;

the second steam supply unit comprises a second boiler and a second steam distribution cylinder, the second boiler can supply steam for the second steam distribution cylinder, the second steam distribution cylinder is connected with the second steam unit, and a pressure reducing valve is arranged between the second steam distribution cylinder and the second steam unit;

the first cylinder distributor is communicated with the second cylinder distributor, and a valve is arranged between the first cylinder distributor and the second cylinder distributor;

when the first steam supply unit and the second steam supply unit both operate normally, a valve between the first steam distribution cylinder and the second steam distribution cylinder is closed, and a passage between the first steam distribution cylinder and the second steam distribution cylinder is disconnected;

when one of the first steam supply unit or the second steam supply unit fails, a valve between the first steam dividing cylinder and the second steam dividing cylinder is opened, the first steam dividing cylinder is communicated with the second steam dividing cylinder, and the first steam supply unit or the second steam supply unit supplies steam to the first steam unit and the second steam unit simultaneously.

2. The cigarette factory boiler feed water and steam staging system of claim 1 further comprising a first deaerator and a second deaerator;

boiler water of the first boiler can enter the first boiler through the first deaerator;

boiler water of the second boiler can enter the second boiler through the second deaerator;

and the second branch cylinder is respectively communicated with the first deaerator and the second deaerator and is used for heating boiler water in the first deaerator and the second deaerator.

3. The cigarette factory boiler water supply and steam-classifying system according to claim 2, characterized in that:

the system further comprises a first pump stack;

first oxygen-eliminating device with the intercommunication has the water supply pipeline between the second oxygen-eliminating device, be provided with first check valve on the water supply pipeline, boiler water accessible in the second oxygen-eliminating device first pump package warp the water supply pipeline passes through the first deoxidization head of first oxygen-eliminating device gets into first oxygen-eliminating device.

4. The cigarette factory boiler feed water and steam-classifying system according to claim 3, wherein:

the first deaerator with the intercommunication has the steam supply pipeline between the second deaerator, be provided with the second check valve on the steam supply pipeline, steam accessible in the first deaerator the steam supply pipeline gets into the second deaerator.

5. The cigarette factory boiler feed water and steam-classifying system according to claim 3, wherein:

the system further comprises a second pump stack;

a first liquid level sensor is arranged in the first deaerator, and a second liquid level sensor is arranged in the second deaerator;

when the first liquid level sensor detects that the water level in the first deaerator reaches a preset value, water in the first deaerator can be pumped into the second deaerator through the second pump group;

and when the second liquid level sensor detects that the water level in the second deaerator is lower than a preset value, replenishing water to the second deaerator.

6. The cigarette factory boiler water supply and steam-classifying system according to claim 2, characterized in that:

a first temperature sensor and a first pressure sensor are arranged in the first deaerator, and a second temperature sensor and a second pressure sensor are arranged in the second deaerator;

when the temperature in the first deaerator or the second deaerator is detected to be less than or equal to 100 ℃, the second branch cylinder heats the first deaerator and the second deaerator;

when the temperature in the first deaerator and/or the second deaerator is detected to be higher than 100 ℃ and the pressure in the first deaerator or the second deaerator is detected to be higher than a preset value, the first pressure sensor and/or the second pressure sensor transmit signals to an electric valve of the first deaerator or the second deaerator, and the first deaerator and/or the second deaerator are/is decompressed to adjust the temperature.

7. The cigarette factory boiler water supply and steam classification system of claim 6, wherein:

the system also comprises a boiler controller and a sensor, wherein the sensor is in signal connection with the boiler controller;

the first steam unit and the second steam unit are respectively connected with the sensor;

the boiler controller may control the power of the first boiler and the second boiler;

when the first steam unit and the second steam unit need to use steam, the sensor sends a signal to the corresponding boiler in advance according to the length of a pipeline between the gas-using equipment and the boiler and the steam flow rate, and the boiler receives the signal and increases the operation load in advance according to the steam consumption to be increased suddenly.

8. The cigarette factory boiler water supply and steam-classifying system according to claim 7, wherein:

the system also includes a cylinder trap;

the first branch cylinder and the second branch cylinder are respectively connected with one cylinder drain valve;

and the condensed water generated by the first branch cylinder and the second branch cylinder is discharged into the first deaerator through the drain valve.

9. The cigarette factory boiler water supply and steam-classifying system according to claim 8, wherein:

the system further includes a pipeline trap;

a pipeline drain valve is arranged on a steam supply pipeline between the first steam distributing cylinder and the first steam unit, and condensed water in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve;

and/or the steam supply pipeline between the second steam distributing cylinder and the second steam unit is provided with the pipeline drain valve, and condensed water in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve.

10. The cigarette factory boiler water supply and steam-classifying system according to claim 2, characterized in that:

the drainage of the first boiler can be directly discharged into the second deaerator, an electric valve is arranged between the first boiler and the second deaerator, and the electric valve controls the on-off of the drainage of the first boiler to the second deaerator.

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