Boiler feed and classified steam system for cigarette factory

Abstract

The application discloses a cigarette factory boiler feed water and classification steam system, wherein the first steam supply unit comprises a first boiler and a first steam cylinder, the first boiler can supply steam for the first steam cylinder, and the first steam cylinder is connected with a first steam use unit; the second steam supply unit comprises a second boiler and a second steam cylinder, the second boiler can supply steam for the second steam cylinder, the second steam cylinder is connected with a second steam use unit, and a pressure reducing valve is arranged between the second steam cylinder and the second steam use unit; the first steam cylinder is communicated with the second steam cylinder, and a valve is arranged between the first steam cylinder and the second steam cylinder; when one of the first steam supply unit or the second steam supply unit fails, the valve between the first steam cylinder and the second steam cylinder is opened, the first steam cylinder is communicated with the second steam cylinder, and the first steam supply unit or the second steam supply unit simultaneously supplies steam for the first steam use unit and the second steam use unit. The boiler can be independently operated, and can also be cross-operated when a failure occurs, so that the sudden situation can be effectively coped with.

Description

Technical Field

[0001] This invention relates to the field of industrial boiler steam supply technology, and more specifically, to a boiler feedwater and classified steam system for a cigarette factory. Background Technology

[0002] Currently, traditional steam supply methods in cigarette manufacturing involve supplying steam from two or more boilers to a single steam distribution cylinder, which is then piped together for unified steam supply. This ensures both boilers operate at the same pressure, receive unified water replenishment, and simultaneously perform thermal deaeration on all deaerators. This results in high energy consumption, frequent boiler drainage, and significant wastewater discharge. Furthermore, cigarette manufacturing plants install steam-heating equipment where the heated steam becomes condensate, which can be recycled. There are also steam-humidifying devices where the steam used for humidification is consumed, leaving no condensate or making condensate recovery impossible. Some high-pressure steam-heating equipment, such as vacuum dehumidification equipment, is intermittent and consumes large quantities of steam. Because these devices are located far from the boiler room, when the steam consumption increases, the steam network pressure drops, requiring the boiler to increase its load, but by then the boiler is already lagging behind and unable to generate sufficient stable steam pressure in a short time. This leads to large and frequent steam fluctuations, even resulting in short-term insufficient steam supply, affecting product quality.

[0003] Therefore, how to provide a scientifically designed boiler feedwater and classified steam system for cigarette factories that meets actual production needs has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a scientifically designed and rationally constructed boiler water supply and steam classification system for cigarette factories that meets actual production needs.

[0005] According to a first aspect of the present invention, a boiler feedwater and steam sorting system for a cigarette factory is provided, comprising a first steam supply unit, a second steam supply unit, a first steam consumption unit, and a second steam consumption unit; the first steam supply unit includes a first boiler and a first steam distribution cylinder, the first boiler supplying steam to the first steam distribution cylinder, and the first steam distribution cylinder being connected to the first steam consumption unit; the second steam supply unit includes a second boiler and a second steam distribution cylinder, the second boiler supplying steam to the second steam distribution cylinder, the second steam distribution cylinder being connected to the second steam consumption unit, and a pressure reducing valve being provided between the second steam distribution cylinder and the second steam consumption unit; the first steam distribution cylinder and... The second steam distributor is connected, and a valve is provided between the first steam distributor and the second steam distributor. When both the first steam supply unit and the second steam supply unit are operating normally, the valve between the first steam distributor and the second steam distributor is closed, and the passage between the first steam distributor and the second steam distributor is disconnected. When either the first steam supply unit or the second steam supply unit malfunctions, the valve between the first steam distributor and the second steam distributor is opened, and the first steam distributor and the second steam distributor are connected. The first steam supply unit or the second steam supply unit simultaneously supplies steam to both the first steam user unit and the second steam user unit.

[0006] Optionally, the system further includes a first deaerator and a second deaerator; the boiler water of the first boiler can enter the first boiler through the first deaerator; the boiler water of the second boiler can enter the second boiler through the second deaerator; the second steam distribution cylinder is connected to the first deaerator and the second deaerator respectively, and heats the boiler water in the first deaerator and the second deaerator.

[0007] Optionally, the system further includes a first pump set; a water supply pipeline connects the first deaerator and the second deaerator, and a first check valve is installed on the water supply pipeline. Boiler water in the second deaerator can enter the first deaerator through the first pump set, the water supply pipeline, and the first deaerator head of the first deaerator.

[0008] Optionally, a steam supply pipeline is connected between the first deaerator and the second deaerator, and a second check valve is installed on the steam supply pipeline, through which steam in the first deaerator can enter the second deaerator.

[0009] Optionally, the system further includes a second pump set; a first liquid level sensor is installed in the first deaerator, and a second liquid level sensor is installed in the second deaerator; when the first liquid level sensor detects that the water level in the first deaerator reaches a preset value, the water in the first deaerator can be pumped into the second deaerator through the second pump set; when the second liquid level sensor detects that the water level in the second deaerator is lower than the preset value, water is added to the second deaerator.

[0010] Optionally, the first deaerator is equipped with a first temperature sensor and a first pressure sensor, and the second deaerator is equipped with a second temperature sensor and a second pressure sensor. When the temperature detected in the first or second deaerator is less than or equal to 100°C, the second steam distributor heats the first and second deaerators. When the temperature detected in the first and / or second deaerator is greater than 100°C and the pressure detected in the first or second deaerator is greater than a preset value, the first and / or second pressure sensors transmit signals to the electric valves of the first and / or second deaerators to depressurize the first and / or second deaerators to regulate the temperature.

[0011] Optionally, the system further includes a boiler controller and sensors, with the sensors connected to the boiler controller via signals; the first steam-consuming unit and the second steam-consuming unit are each connected to the sensors; the boiler controller can control the power of the first boiler and the second boiler; when the first steam-consuming unit and the second steam-consuming unit need steam, the sensors send signals to the corresponding boilers in advance based on the pipe length and steam flow rate between the steam-consuming equipment and the boiler, and the boilers, upon receiving the signals, increase their operating load in advance based on the impending sudden increase in steam consumption.

[0012] Optionally, the system further includes a cylinder drain valve; the first steam separator and the second steam separator are each connected to one of the cylinder drain valves; the condensate generated by the first steam separator and the second steam separator is discharged into the first deaerator through the drain valve.

[0013] Optionally, the system further includes a pipeline drain valve; the pipeline drain valve is provided on the steam supply pipeline between the first steam distributor and the first steam consumption unit, and the condensate in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve; and / or, the pipeline drain valve is provided on the steam supply pipeline between the second steam distributor and the second steam consumption unit, and the condensate in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve.

[0014] Optionally, the drainage from the first boiler can be directly discharged into the second deaerator. An electric valve is provided between the first boiler and the second deaerator, and the electric valve controls the flow of drainage from the first boiler to the second deaerator.

[0015] According to the technical content disclosed in this invention, the following beneficial effects are achieved:

[0016] In this invention, the steam generated by the two boilers is utilized according to the steam-consuming equipment. This allows the two boilers to operate independently with consistent or inconsistent operating pressures. Furthermore, the two boilers can serve as backups for each other. Under normal circumstances, one of the steam supply systems does not require additional softened water, and the deaerator supplying water to the boiler in this system does not require heating and deoxygenation. Boiler wastewater can be directly recycled. The system can provide early warnings of increased steam consumption by the steam-consuming equipment, allowing the boiler to increase its load in advance to meet the steam demand and prevent insufficient steam pressure, thereby ensuring production and saving energy.

[0017] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0019] Figure 1 This is the first part of a schematic diagram of a boiler feedwater and steam sorting system for a cigarette factory, provided according to an embodiment.

[0020] Figure 2 This is the second part of a schematic diagram of a boiler feedwater and steam sorting system for a cigarette factory, provided according to an embodiment. Detailed Implementation

[0021] Exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] See Figure 1 and Figure 2 According to a first aspect of the present invention, a boiler feedwater and steam sorting system for a cigarette factory is provided, comprising a first steam supply unit, a second steam supply unit, a first steam consumption unit, and a second steam consumption unit; the first steam supply unit includes a first boiler 10 and a first steam distribution cylinder 33, wherein the first boiler 10 may be the first steam distribution cylinder 33, and the first steam distribution cylinder 33 is connected to the first steam consumption unit; the second steam supply unit includes a second boiler 6 and a second steam distribution cylinder 36, wherein the second boiler 6 may supply steam to the second steam distribution cylinder 36, and the second steam distribution cylinder 36 is connected to the second steam consumption unit, wherein a pressure reducing valve is provided between the second steam distribution cylinder 36 and the second steam consumption unit; the first steam distribution cylinder 33 and... The second steam distributor 36 is connected, and a valve is provided between the first steam distributor 33 and the second steam distributor 36. When both the first steam supply unit and the second steam supply unit are operating normally, the valve between the first steam distributor 33 and the second steam distributor 36 is closed, and the passage between the first steam distributor 33 and the second steam distributor 36 is disconnected. When either the first steam supply unit or the second steam supply unit malfunctions, the valve between the first steam distributor 33 and the second steam distributor 36 is opened, and the first steam distributor 33 and the second steam distributor 36 are connected. The first steam supply unit or the second steam supply unit simultaneously supplies steam to both the first steam user unit and the second steam user unit.

[0027] Furthermore, 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 steam distribution cylinder 36 is connected to the first deaerator 98 and the second deaerator 133 respectively, and heats the boiler water in the first deaerator 98 and the second deaerator 133.

[0028] Furthermore, the system also includes a first pump set 137; a water supply pipeline is connected between the first deaerator 98 and the second deaerator 133, and a first check valve 105 is provided on the water supply pipeline. Boiler water in the second deaerator 133 can enter the first deaerator 98 through the first pump set 137, the water supply pipeline, and the first deaerator head 115 of the first deaerator 98.

[0029] Furthermore, a steam supply pipeline is connected between the first deaerator 98 and the second deaerator 133, and a second check valve 120 is provided on the steam supply pipeline, so that the steam in the first deaerator 98 can enter the second deaerator 133 through the steam supply pipeline.

[0030] Furthermore, the system also includes a second pump set 102; a first liquid level sensor 111 is installed in the first deaerator 98, and a second liquid level sensor 130 is installed 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, the water in the first deaerator 98 can be pumped into the second deaerator 133 through the second pump set 102; when the second liquid level sensor 130 detects that the water level in the second deaerator 133 is lower than the preset value, water is added to the second deaerator 133.

[0031] Furthermore, the first deaerator 98 is equipped with a first temperature sensor 112 and a first pressure sensor 113, and the second deaerator 133 is equipped with a second temperature sensor 129 and a second pressure sensor 128. When the temperature detected in the first deaerator 98 or the second deaerator 133 is less than or equal to 100°C, the second steam distributor 36 heats the first deaerator 98 and the second deaerator 133. When the temperature detected in the first deaerator 98 and / or the second deaerator 133 is greater than 100°C and the pressure detected in the first deaerator 98 or the second deaerator 133 is greater than a preset value, the first pressure sensor 113 and / or the second pressure sensor 128 transmits a signal to the electric valve of the first deaerator 98 or the second deaerator 133 to depressurize the first deaerator 98 and / or the second deaerator 133 to regulate the temperature.

[0032] Furthermore, the system also includes a boiler controller 1 and sensors, with the sensors connected to the boiler controller 1 via signals; the first steam-consuming unit and the second steam-consuming unit are each connected to the sensors; the boiler controller 1 can control the operating power of the first boiler 10 and the second boiler 6; when the first steam-consuming unit and the second steam-consuming unit need steam, the sensors send signals to the corresponding boilers in advance based on the pipe length and steam flow rate between the steam-consuming equipment and the boilers, and the boilers, upon receiving the signals, increase their operating load in advance based on the impending sudden increase in steam consumption.

[0033] Furthermore, the system also includes a cylinder drain valve; the first steam separator 33 and the second steam separator 36 are each connected to one of the cylinder drain valves; the condensate generated by the first steam separator 33 and the second steam separator 36 is discharged into the first deaerator 98 through the drain valve.

[0034] Furthermore, the system also includes a pipeline drain valve; the pipeline drain valve is installed on the steam supply pipeline between the first steam distributor 33 and the first steam consumption unit, and the condensate in the steam supply pipeline is discharged into the first deaerator 98 through the pipeline drain valve; and / or, the pipeline drain valve is installed on the steam supply pipeline between the second steam distributor 36 and the second steam consumption unit, and the condensate in the steam supply pipeline is discharged into the first deaerator 98 through the pipeline drain valve.

[0035] Furthermore, the drainage from the first boiler 10 can be directly discharged into the second deaerator 133. An electric valve is provided between the first boiler 10 and the second deaerator 133, and the electric valve controls the flow of drainage from the first boiler 10 to the second deaerator 133.

[0036] Specifically:

[0037] The overall process flow is as follows: Under normal circumstances, the steam generated by the first boiler 10 enters the first steam distributor 33, which then supplies the steam to the first steam-using equipment 83 and the second steam-using equipment 68. The condensate generated by the steam distributor, pipeline network, and steam-using equipment flows back into the first deaerator 98. The water in the first deaerator 98 is then supplied to the first boiler 10, and the steam generated by the first boiler 10 is then supplied to the first steam-using equipment 83 and the second steam-using equipment 68. This cycle repeats continuously. Since the steam used by the first steam-using equipment 83 and the second steam-using equipment 68 is converted into condensate and recycled back into the first deaerator 98, a closed-loop system is formed between the first deaerator 98, the first boiler 10, the first steam-using equipment 83, and the second steam-using equipment 68. Furthermore, the first deaerator 98 in this system does not require water replenishment or thermal deaeration, thus saving steam and water. Even when there is a lot of condensate and the water level in the first deaerator 98 is high, the excess water in the first deaerator 98 can enter the second deaerator 133, thereby reducing the amount of water to be made up in the second deaerator 133. Due to the closed-loop system, the water discharged from the first boiler 10, which is of relatively good quality, can also be discharged into the second deaerator 133, and finally only the water is discharged through the second boiler 6. The steam generated by the second boiler 6 enters the second steam distribution cylinder 36, which then supplies the steam to the third steam-using equipment 46, the fourth steam-using equipment 63, the first deaerator 98, and the second deaerator 133. Since the steam used for humidification by the third steam-using equipment 46 and the fourth steam-using equipment 63, and the steam consumed for heating and deoxygenation by the first deaerator 98 and the second deaerator 133, do not produce condensate, meaning the steam is completely consumed and utilized, the second deaerator 133 needs to be continuously replenished with softened water and continuously used for thermal deoxygenation and steam heating. Therefore, the following flow process is formed: softened water replenishes the second deaerator 133, the second deaerator 133 supplies water to the second boiler 6, and the second boiler 6 generates steam for use by the third steam-using equipment 46 and the fourth steam-using equipment 63. Because the pipelines transporting steam are long and some steam-consuming equipment fluctuates greatly, sensors are installed on all steam-consuming equipment. In order to avoid the boiler increasing its load and then the steam-consuming equipment suddenly increasing its steam consumption, the sensors send a signal to the boiler in advance before the steam-consuming equipment is about to use steam. The boiler then automatically increases its load appropriately, thereby avoiding a sudden drop in the steam network pressure.

[0038] The detailed process of steam utilization is as follows:

[0039] Steam generated by the first boiler 10 enters the first steam distribution cylinder 33 via the first valve 13, the first pipeline 14, the second pipeline 15, the third pipeline 17, and the second valve 16. The steam from the first steam distribution cylinder 33 can be used to heat the first steam-consuming equipment 83 via the third valve 18, the fourth pipeline 19, the fifth pipeline 77, the sixth pipeline 78, and the fourth valve 79. The steam from the first steam distribution cylinder 33 can also be used to heat the second steam-consuming equipment 68 via 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 distribution cylinder 36 via the seventh valve 7, tenth pipe 8, eleventh pipe 39, twelfth pipe 41, and eighth valve 40. Steam from the second steam distribution cylinder 36 can be supplied to the third steam-using equipment 46 via the ninth valve 31, thirteenth pipe 32, fourteenth pipe 52, first pressure reducing valve 53, and tenth valve 54. Steam from the second steam distribution cylinder 36 can also be supplied via the eleventh valve 29, fifteenth pipe 30, sixteenth pipe 57, second pressure reducing valve 58, and the... The 12th valve 59 supplies steam to the fourth steam-using equipment 63. The steam from the second steam distribution cylinder 36 can also pass through the 13th valve 27, the 17th pipeline 28, the 18th pipeline 90, and the third pressure reducing valve 91, and then through the 19th pipeline 92 and the first electric valve 96 to enter the first silencer 97 to heat the boiler feedwater of the first deaerator 98. Alternatively, it can pass through the 20th pipeline 117, the 21st pipeline 122, and the second electric valve 123 to enter the second silencer 135 to heat the boiler feedwater of the second deaerator 133.

[0040] As can be seen from the above, since the first boiler 10 and the second boiler 6 typically supply steam to different steam-consuming devices, the steam generated by the first boiler 10 is supplied to the first steam-consuming device 83 and the second steam-consuming device 68 without pressure-reducing valves. However, the steam generated by the second boiler 6 is supplied to the third steam-consuming device 46, the fourth steam-consuming device 63, and the first deaerator 98 and the second deaerator 133, respectively, with a first pressure-reducing valve 53, a second pressure-reducing valve 58, and a third pressure-reducing valve 91 installed on the front-end pipes. Therefore, the first boiler 10 and the second boiler 6 can operate at the same pressure. Different operating pressures can also be used. For example, the first boiler 10 can operate at high pressure to supply steam to the first steam-using equipment 83 and the second steam-using equipment 68, while the second boiler 6 can also operate at high pressure and then supply steam to the third steam-using equipment 46, the fourth steam-using equipment 63, the first deaerator 98, and the second deaerator 133 after the pressure is reduced by the first pressure reducing valve 53, the second pressure reducing valve 58, and the third pressure reducing valve 91. Alternatively, the first boiler 10 can operate at high pressure, while the second boiler 6 can directly operate at low pressure to supply steam to the third steam-using equipment 46, the fourth steam-using equipment 63, the first deaerator 98, and the second deaerator 133, thus saving energy. Furthermore, the first boiler 10 and the second boiler 6 can serve as backups for each other. Since a connecting pipe and valve are installed between the first steam distribution cylinder 33 and the second steam distribution cylinder 36, if the first boiler 10 malfunctions and cannot operate, the second boiler 6 will operate at high pressure. The steam in the second steam distribution cylinder 36 can enter the first steam distribution cylinder 33 via the fourteenth valve 25, the twenty-second pipe 26, the twenty-third pipe 24, the twenty-fourth pipe 23, and the fifteenth valve 22. The steam in the first steam distribution cylinder 33 can then be used by the first steam-consuming equipment 83 and the second steam-consuming equipment 68. Similarly, if the second boiler 6 malfunctions and cannot operate, when the first boiler 10 is operating at high pressure, the steam in the first steam distribution cylinder 33 can enter the second steam distribution cylinder 36 via the fifteenth valve 22, the twenty-fourth pipe 23, the twenty-third pipe 24, the twenty-second pipe 26, and the fourteenth valve 25. After being depressurized by the first pressure-reducing valve 53, the second pressure-reducing valve 58, and the third pressure-reducing valve 91, it can 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 present invention provides a flexible, reliable, and energy-saving method for classifying and using steam in cigarette factories.

[0041] The specific process for condensate recovery and boiler drainage is as follows: Condensate generated by the first steam separator 33 enters pipe 38 through the first steam trap 34; condensate generated by the second steam separator 36 also enters the twenty-fifth pipe 38 through the second steam trap 37, and then enters the thirtieth pipe 82 through the twenty-sixth pipe 44, the twenty-seventh pipe 45, the twenty-eighth pipe 62, and the twenty-ninth pipe 67; condensate generated on the pipes supplying steam to the third steam-using equipment 46 and the fourth steam-using equipment 63 enters the twenty-eighth pipe 62 through steam trap 42, pipe 43, the twenty-seventh pipe 45, the third steam trap 50, and the thirty-first pipe 51, respectively. The condensate, generated on the pipes supplying steam to the second steam-using equipment 68 and the first steam-using equipment 83, then flows through the fourth steam trap 55, the thirty-second pipe 56, the thirty-third pipe 65, the twenty-ninth pipe 67, the fifth steam trap 74, the thirty-fourth pipe 75, and the thirty-fifth pipe 80 into the thirty-second pipe 82. The condensate directly generated by the second steam-using equipment 68 and the first steam-using equipment 83 also flows 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 into the thirty-second pipe 82. The condensate collected in the thirty-second pipe 82 from the various steam cylinders, pipes, and steam-using equipment then flows through the thirty-sixth pipe 87, the thirty-seventh pipe 89, the thirty-eighth pipe 94, and the thirty-ninth pipe 95 into the first deaerator head 115 and finally into the first deaerator 98. Thus, the amount of condensate recovered in the first deaerator 98 may be greater than the water consumption of the first boiler 10. The first deaerator 98 is equipped with a first liquid level sensor 111. When the first liquid level sensor 111 detects that the water level in the first deaerator 98 is high, the excess water in the first deaerator 98 enters the second silencer 136 through the fortieth pipe 101, the second pump group 102, the forty-first pipe 103, the forty-second pipe 107, the forty-third pipe 109, and the forty-fourth pipe 108, and then enters the second deaerator 133 from the second silencer 136, thereby reducing the makeup water of the second deaerator 133. Because the circulation system formed between the first deaerator 98, the first boiler 10, the first steam-using equipment 83, and the second steam-using equipment 68 only replenishes water when the first deaerator 98 and the first boiler 10 are initially started using water or when the system is severely leaking and the water volume is insufficient, the water replenished in the system during normal operation is all condensate produced by various steam-using equipment, steam distribution cylinders, and pipelines. The condensate is pure and contains almost no impurities or oxygen. The first deaerator 98 does not need to be replenished with softened water, nor does it need to be heated by steam for thermal deaeration. Therefore, this system not only saves water but also saves steam.Because the water quality in this system is pure, sometimes the first boiler 10 discharges water. This water can enter the second silencer 136 through the third electric valve 9, the forty-fifth pipe 144, the forty-sixth pipe 141, the forty-second pipe 107, the forty-third pipe 109, and the forty-fourth pipe 108, and then enter the second deaerator 133 from the second silencer 136. This saves hot water and reduces the need for the second deaerator 133 to replenish softened water. However, the feed water of the second boiler 6 is mostly newly softened water after deaeration. Therefore, the water discharged from the second boiler 6 is directly discharged through the electric valve 5 and the drain pipe 5.

[0042] The system water replenishment and deaerator heating and deoxygenation process is as follows: A second liquid level sensor 130 is installed on the second deaerator 133. When the second liquid level sensor 130 detects that the liquid level of the second deaerator 133 is low, the softened water enters the second deaerator head 125 through the pipe 127 and the fourth electric valve 126, and then falls from the second deaerator head 125 into the second deaerator 133. The softened water in the second deaerator 133 can enter the second boiler 6 through the forty-seventh pipe 134, the first pump group 137, the forty-eighth pipe 142, the forty-ninth pipe 143, and the fifth electric valve 12. When the first deaerator 98 is running for the first time or when the system leaks and needs to be replenished, the level gauge detects that the liquid level in the first deaerator 98 is low. Water from the second deaerator 133 can then flow through the forty-seventh pipe 134, the first pump group 137, the fiftieth pipe 104, the first check valve 105, the flow meter 106, and the sixth electric valve 114 into the first deaerator head 115, and then fall from the first deaerator head 115 into the first deaerator 98. At this time, the first deaerator 98 only performs thermal deaeration when the sixth electric valve 114 is opened to replenish softened water to the first deaerator 98. That is, the heating first electric valve 96 is opened, and steam from the second steam distributor 36 flows through the thirteenth valve 27, the seventeenth pipe 28, the eighteenth pipe 90, and the third pressure reducing valve 91, and then through the nineteenth pipe 92 and the first electric valve 96 into the first silencer 97 to heat the first deaerator 98 for deaeration. Since the first deaerator 98 recovers a large amount of condensate, and the condensate temperature may be very high, the hot steam emitted during the flash steam or thermal deaeration of the first deaerator 98 enters the second silencer 136 through the first deaerator head 115 via the fifty-first pipe 116, the second check valve 120, the fifty-second pipe 110, and the forty-fourth pipe 108. Then, it enters the second deaerator 133 from the second silencer 136 to heat the softened water therein, which saves energy.

[0043] The deaerator heating control method is as follows: when the temperature is below 100 degrees Celsius, the deaerator uses temperature control mode; when the temperature is above 100 degrees Celsius, it switches to pressure control mode. Because the second deaerator 133 continuously replenishes softened water, during thermal deaeration, the second electric valve 123 opens, and steam flows from the second steam distributor 36 through the thirteenth valve 27, the seventeenth pipe 28, the eighteenth pipe 90, and the third pressure reducing valve 91, then through the twentieth pipe 117, the twenty-first pipe 122, and the second electric valve 123 into the second silencer 135 to heat the softened water in the second deaerator 133 for thermal deaeration. Since the temperature must reach above 100 degrees Celsius for the most thorough thermal deaeration, the hot air inside the second deaerator 133 carries the oxygen overflowing from the water and is discharged into the atmosphere through the vent pipe 124 from the second deaerator head 125. Because the water temperature rises during thermal deaeration in the deaerator, temperature control is used when there is no pressure inside the deaerator, and pressure control is switched when there is pressure inside the deaerator. A second temperature sensor 129 and a second pressure sensor 128 are installed on the second deaerator 133, and a first temperature sensor 112 and a first pressure sensor 113 are installed on the first deaerator 98. When the deaeration temperature of the second deaerator 133 or the first deaerator 98 is below 100 degrees Celsius, the second temperature sensor 129 and the first temperature sensor 112 respectively detect the temperature signals of the second deaerator 133 or the first deaerator 98 and send them to the fourth electric valve 126 and the sixth electric valve 114, respectively, to control the temperature of the second deaerator 133 and the first deaerator 98 through the temperature sensors. When the temperature of the deaerator exceeds 100 degrees Celsius, meaning there is steam and saturated water inside the deaerator at pressures higher than atmospheric pressure, the control signal of the electric valves is switched. This involves sending pressure signals to the fourth electric valve 126 and the sixth electric valve 114 via the second pressure sensor 128 and the first pressure sensor 113, respectively, to control the pressure of the second deaerator 133 and the first deaerator 98. Since there is a one-to-one correspondence between steam temperature and pressure, and the pressure of the deaerator is relatively easy to control with high precision and sensitive response, controlling the pressure is equivalent to controlling the temperature, ensuring safety and reliability.

[0044] The control process to prevent pressure fluctuations in the steam pipeline system is as follows: Since the steam-using equipment is far from the boiler and the steam pipeline is long, and some steam-using equipment has intermittent and discontinuous steam consumption, the steam consumption is sudden and large. A sudden increase in steam consumption will cause the pipeline pressure to drop, insufficient steam supply, or even instantaneous pumping down the boiler water level, causing the boiler to shut down due to low water level. Therefore, the third steam-consuming device 46 is equipped with a first sensor 48, the fourth steam-consuming device 63 is equipped with a second sensor 60, the second steam-consuming device 68 is equipped with a third sensor 70, and the first steam-consuming device 83 is equipped with a fourth sensor 85. 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 via the first transmission line 49, the second transmission line 61, the third transmission line 71, and the fourth transmission line 86, and then sequentially via 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. The boiler controller 1 can then control the first boiler 10 via the twelfth transmission line 11 or control the second boiler 6 via the thirteenth transmission line 2. When a steam-consuming device is about to reach a certain process flow or stage and needs to use steam due to process requirements, the sensors installed on it send a signal to the corresponding boiler in advance based on the pipeline length between the steam-consuming device and the boiler, the steam flow rate, etc. Upon receiving the signal, the boiler appropriately increases its operating load in advance based on the sudden increase in steam consumption. In this way, when the steam-consuming device uses steam, the pipeline network supplying it has already supplied excess steam to the steam-consuming device, and the pipeline system pressure will not suddenly drop due to a sudden increase in steam consumption, or even cause a temporary shortage of steam supply or boiler shutdown due to low water level, thus affecting production. Similarly, the heating electric valve 123 of the second deaerator 133 and the heating electric valve 96 of the first deaerator 98 are also connected to the fourteenth transmission line 121 and the fifteenth transmission line 93, respectively. The signals of the second electric valve 123 and the first electric valve 96 are then transmitted to the boiler controller 1 through the sixteenth transmission line 118, the seventeenth transmission line 119, the eighteenth transmission line 132, and the nineteenth transmission line 140. The boiler controller 1 can then control the first boiler 10 through the twelfth transmission line 11 or the second boiler 6 through the thirteenth transmission line 2.

[0045] This invention utilizes a first boiler to supply steam exclusively to equipment requiring steam heating, and a second boiler to supply steam exclusively to equipment requiring steam humidification. The humidification steam pressure is low, allowing the first boiler to operate at high pressure while the second boiler can simultaneously operate at low pressure. However, the two steam supply systems are connected by pipes and valves, ensuring that if one boiler malfunctions, the other can supply steam to all equipment. The boiler water supply process involves the unified recycling of condensate from steam condensation in all heating equipment, pipes, and steam distribution cylinders to the first deaerator. The first deaerator then supplies water to the first boiler. Because the first deaerator recycles condensate, and a large amount of condensate is recycled after heating with steam from the first boiler, the first deaerator, boiler, and steam-using equipment form a closed-loop system. This system requires minimal replenishment of water, and the boiler feedwater does not need heating or deaeration, saving energy. Water replenishment is only necessary for initial operation, leaks, or special circumstances. Since the first boiler's feedwater supply is continuous, the water undergoes evaporation and condensation, resulting in fewer impurities in the boiler feedwater, which can be directly reused, further saving energy. The second deaerator supplies water to both the second boiler and the first deaerator. Since the steam generated by the second boiler is used for humidification, only the second deaerator needs continuous replenishment of fresh water and thermal deaeration. Furthermore, this invention installs sensors on steam-using equipment to monitor the start and end times of steam consumption, especially for equipment with intermittent, instantaneous high steam consumption. Just before steam consumption begins, the sensors, based on the length of the steam delivery pipeline and the steam flow rate, send a signal to the boiler in advance, allowing the boiler to increase its steam load accordingly, thereby preventing a sudden drop in pipeline steam pressure caused by sudden steam consumption.

[0046] In summary, the steam generated by the two boilers in this invention is utilized according to the steam-consuming equipment. This allows the two boilers to operate independently with consistent or inconsistent operating pressures. Furthermore, the two boilers can serve as backups for each other. Under normal circumstances, one of the steam supply systems does not require additional softened water, and the deaerator supplying water to the boiler in this system does not require heating and deoxygenation. Boiler wastewater can be directly recycled. The system can provide early warnings of increased steam consumption by the steam-consuming equipment, allowing the boiler to increase its load in advance to meet the steam demand and prevent insufficient steam pressure, thereby ensuring production and saving energy.

[0047] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can 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

1. A boiler feedwater and steam sorting system for a cigarette factory, characterized in that, include: First steam supply unit, second steam supply unit, first steam consumption unit, and second steam consumption unit; The first steam supply unit includes a first boiler and a first steam distribution cylinder. The first boiler can supply steam to the first steam distribution cylinder, and the first steam distribution cylinder is connected to the first steam consumption unit. The second steam supply unit includes a second boiler and a second steam distribution cylinder. The second boiler can supply steam to the second steam distribution cylinder. The second steam distribution cylinder is connected to the second steam consumption unit. A pressure reducing valve is provided between the second steam distribution cylinder and the second steam consumption unit. The first steam separator is connected to the second steam separator, and a valve is provided between the first steam separator and the second steam separator. When both the first steam supply unit and the second steam supply unit are operating normally, the valve between the first steam distributor and the second steam distributor is closed, and the passage between the first steam distributor and the second steam distributor is disconnected. When one of the first steam supply unit or the second steam supply unit fails, the valve between the first steam distributor cylinder and the second steam distributor cylinder opens, the first steam distributor cylinder and the second steam distributor cylinder are connected, and the first steam supply unit or the second steam supply unit simultaneously supplies steam to the first steam consumption unit and the second steam consumption unit. The system also includes a first deaerator and a second deaerator; The boiler water for the first boiler can enter the first boiler through the first deaerator; The boiler water for the second boiler can enter the second boiler via the second deaerator; The second steam separator is connected to the first deaerator and the second deaerator respectively, and heats the boiler water in the first deaerator and the second deaerator. The system also includes a first pump set; A water supply pipeline connects the first deaerator and the second deaerator. A first check valve is installed on the water supply pipeline. Boiler water in the second deaerator can enter the first deaerator through the first pump set, the water supply pipeline, and the first deaerator head of the first deaerator. A steam supply pipeline connects the first deaerator and the second deaerator. A second check valve is installed on the steam supply pipeline, and steam in the first deaerator can enter the second deaerator through the steam supply pipeline. The first deaerator is equipped with a first temperature sensor and a first pressure sensor, and the second deaerator is equipped with a second temperature sensor and a second pressure sensor. When the temperature inside the first deaerator or the second deaerator is detected to be less than or equal to 100°C, the second steam separator heats the first deaerator and the second deaerator. When the temperature inside the first deaerator and / or the second deaerator is detected to be greater than 100°C and the pressure inside the first deaerator or the second deaerator is greater than a preset value, the first pressure sensor and / or the second pressure sensor transmit a signal to the electric valve of the first deaerator or the second deaerator to depressurize the first deaerator and / or the second deaerator to regulate the temperature. The system also includes a boiler controller and sensors, with the sensors being signal-connected to the boiler controller. The first steam-consuming unit and the second steam-consuming unit are each connected to the aforementioned sensor; The boiler controller can control the power of the first boiler and the second boiler; When the first steam-consuming unit and the second steam-consuming unit need steam, the sensor sends a signal to the corresponding boiler in advance based on the pipe length between the steam-consuming equipment and the boiler and the steam flow rate. Upon receiving the signal, the boiler increases its operating load in advance based on the impending sudden increase in steam consumption.

2. The boiler feedwater and steam sorting system for cigarette factories according to claim 1, characterized in that: The system also includes a second pump set; The first deaerator is equipped with a first liquid level sensor, and the second deaerator is equipped with a second liquid level sensor. When the first liquid level sensor detects that the water level in the first deaerator has reached a preset value, the water in the first deaerator can be pumped into the second deaerator by the second pump group. When the second liquid level sensor detects that the water level in the second deaerator is lower than a preset value, water is added to the second deaerator.

3. The boiler feedwater and steam sorting system for cigarette factories according to claim 1, characterized in that: The system also includes a cylinder drain valve; The first steam separator and the second steam separator are each connected to a cylinder drain valve; The condensate generated by the first steam separator and the second steam separator is discharged into the first deaerator through the steam trap.

4. The boiler feedwater and steam sorting system for cigarette factories according to claim 3, characterized in that: The system also includes pipeline drain valves; A pipeline drain valve is installed on the steam supply pipeline between the first steam distributor and the first steam-using unit. The condensate 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 cylinder and the second steam unit is provided with the pipeline drain valve, and the condensate in the steam supply pipeline is discharged into the first deaerator through the pipeline drain valve.

5. The boiler feedwater and steam sorting system for cigarette factories according to claim 1, characterized in that: The wastewater from the first boiler can be directly discharged into the second deaerator. An electric valve is installed between the first boiler and the second deaerator, and the electric valve controls the flow of wastewater from the first boiler to the second deaerator.

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