Closed recovery system for process condensed water of cigarette factory

Abstract

The utility model designs a closed recovery system for process condensed water in a cigarette factory, which comprises a power center boiler room which comprises a boiler room steam-distributing cylinder and is used for respectively outputting boiler steam to a production steam pipe, an air-conditioning steam pipe and a deoxidizing steam pipe; the air-conditioning machine room of the combined workshop comprises an air-conditioning steam header, an air-conditioning unit and an air-conditioning condensate water pipe, and an air-conditioning steam pipe is connected with the air-conditioning steam header; the air-conditioning heating steam pipe is connected with the air-conditioning condensate water pipe; the power center deoxygenization room is provided with a deaerator, and the deoxygenization steam pipe is connected with the deaerator; the cut tobacco manufacturing workshop comprises steam equipment and a production condensate pipe, and the production steam pipe is connected with the steam equipment; a power center condensation water recycling station comprises a low-temperature condensation water recycling system, a high-temperature condensation water recycling system, a pollution discharge cooling tank and a dead steam recycling device. Flash steam of high-temperature and low-temperature condensed water is eliminated through the dead steam recovery device, closed recovery is achieved, the single-phase flow conveying effect is achieved, and the quality of the condensed water and the heat efficiency of a steam supply and use system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a condensate water recovery process technical field of cigarette factory heat system, especially a kind of closed recovery system of cigarette factory process condensate water. BACKGROUND

[0002] Steam needs to be used in the process of cigarette factory silk making. Steam can provide the required moisture and suitable temperature environment for tobacco leaf conditioning. Tobacco leaf has certain hygroscopicity, when steam meets cold, it will condense into small water droplets, thereby increasing air humidity. By placing tobacco leaf in this high humidity environment, tobacco leaf can absorb enough moisture, making it soft. Moreover, by controlling the flow and pressure of steam, the temperature of drying equipment can be adjusted. In the drying process, hot steam transfers heat to tobacco, making the moisture in tobacco evaporate. At the same time, the air containing water vapor is discharged by using ventilation system, so as to achieve the purpose of reducing the moisture content of tobacco. In addition, the temperature and humidity environment of the whole workshop also has a great influence on the quality of tobacco. Steam can be used as a heat source for heating system in the workshop to maintain a stable temperature range. At the same time, the humidity of the workshop can also be adjusted by steam humidification system. However, the use of steam will inevitably be accompanied by condensate water.

[0003] The boiler of cigarette factory supplies steam for silk making process and central air conditioning. The silk making process produces 6t / h, 120℃ production condensate water, the air conditioning produces 3t / h, 60℃ medium temperature condensate water, and the silk airflow cut tobacco machine produces 5t / h, 60℃ medium temperature cooling water. Since part of the condensate water produced by steam is not recovered to the boiler room for utilization, the self-consumption steam of boiler is large, and the heat energy utilization rate is low.

[0004] Although part of the production system is provided with condensate water recovery pipeline, it usually only serves individual production link. Even if the pipeline system with joint recovery function is used, it is relatively simple, only does simple merging collection, without further detailed treatment, and cannot better recover heat energy. Moreover, the current open recovery system is easy to contact with atmosphere, and the water recovery pipeline often appears oxidation corrosion, the service life of pipeline is short, and more iron ions are produced to destroy the quality of condensate water, which is not convenient for repeated use and also causes damage to environment. The recovery and utilization of production condensate water is an important measure to save boiler fuel, save water and reduce water treatment cost. It is urgent to develop a kind of closed recovery system of cigarette factory process condensate water, which can protect pipeline and realize the recycling of all condensate water and flash steam, save part of new steam, so as to achieve the purpose of energy saving and environmental protection. UTILITY MODEL CONTENTS

[0005] In order to solve the above prior art, the utility model provides a kind of closed recovery system of cigarette factory process condensate, each part condensate is divided into high and low temperature and is recycled, and flash steam is eliminated by means of exhaust steam recovery device, to realize combined closed recovery while ensuring one-way flow delivery.The technical scheme for achieving the above object of the utility model is specifically as follows:

[0006] A kind of closed recovery system of cigarette factory process condensate, comprising:

[0007] Power center boiler room, including boiler room cylinder, for the boiler steam is respectively to production steam pipe, air conditioning steam pipe and deaerating steam pipe output;

[0008] Combined workshop air conditioning machine room, including air conditioning cylinder, air conditioning unit and air conditioning condensate pipe, the air conditioning steam pipe is connected with the air conditioning cylinder, and the steam input by the air conditioning steam pipe is respectively output to air conditioning heating steam pipe and air conditioning humidification steam pipe by the air conditioning cylinder;The air conditioning humidification steam pipe is connected to the air conditioning unit to humidify the output air;The air conditioning heating steam pipe is connected to the heat exchange coil in the air conditioning unit to heat exchange and heat the output air of the air conditioning unit;The air conditioning heating steam pipe is connected with the air conditioning condensate pipe;

[0009] Power center deaerating room, provided with deaerator, the deaerating steam pipe is connected with the deaerator;

[0010] Tobacco making workshop, including steam equipment and production condensate pipe, the production steam pipe is connected with the steam equipment and provides steam for it, and the steam equipment generates condensate and is transported into the production condensate pipe;

[0011] Power center condensate recovery station, including low temperature condensate recovery system, high temperature condensate recovery system, blowdown cooling tank and exhaust steam recovery device;The exhaust steam recovery device is respectively connected with the high temperature condensate recovery system, the low temperature condensate recovery system and the production condensate pipe;The exhaust steam recovery device is connected with the deaerator through condensate main pipe;The low temperature condensate recovery system is respectively connected with the air conditioning condensate pipe and the blowdown cooling tank, and the low temperature condensate recovery system outputs the condensate in the air conditioning condensate pipe to the exhaust steam recovery device or the blowdown cooling tank after recovering, and the condensate input into the exhaust steam recovery device of the low temperature condensate recovery system is output to the condensate main pipe;The high temperature condensate recovery system is respectively connected with the blowdown cooling tank and the condensate main pipe;The production condensate pipe outputs the condensate input into the exhaust steam recovery device to the high temperature condensate recovery system, and the condensate in the high temperature condensate recovery system is output to the condensate main pipe or the blowdown cooling tank.

[0012] Further, the boiler cylinder and the air conditioning cylinder are respectively provided with cylinder condensate pipes connected to the air conditioning condensate pipe, and the cylinder condensate pipes are provided with drain valves.

[0013] Further, a pressure reducing valve and an electric regulating valve group A are sequentially arranged between the deaerating steam pipe and the deaerator, the electric regulating valve group A includes two pipelines arranged in parallel, one of which is sequentially provided with a stop valve, an electric regulating valve and a stop valve, and the other is provided with a stop valve, and the deaerator is provided with a pressure sensor which feeds back signals to the electric regulating valve group A.

[0014] Further, a pressure reducing valve is arranged on the air conditioning steam pipe, stop valves are arranged on the steam outlet pipelines of the air conditioning cylinder and the boiler cylinder, and pressure gauges are arranged on the air conditioning cylinder and the boiler cylinder.

[0015] Further, the low-temperature condensate recovery system includes a low-temperature condensate recovery device, a filtering device A and a condensate detection device A, the low-temperature condensate recovery device is provided at the top with a safety valve and a pressure gauge and at the bottom with an electric pump, the air conditioning condensate pipe is connected to the low-temperature condensate recovery device, the condensate in the low-temperature condensate recovery device sequentially passes through the filtering device A and the condensate detection device A, the condensate detection device A is respectively connected to the exhaust steam recovery device and the blowdown cooling tank, the filtering device A is provided at the bottom with a blowdown valve, and the condensate detection device A is provided with three sensors of PH, electric conductivity and turbidity.

[0016] Further, the high-temperature condensate recovery system includes a high-temperature condensate recovery device, a filtering device B and a condensate detection device B, the high-temperature condensate recovery device is provided at the top with a safety valve and a pressure gauge and at the bottom with an electric pump, the production condensate pipe is connected to the high-temperature condensate recovery device, the condensate in the high-temperature condensate recovery device sequentially passes through the filtering device B and the condensate detection device B, the condensate detection device B is respectively connected to the condensate main pipe and the blowdown cooling tank, the filtering device B is provided at the bottom with a blowdown valve, and the condensate detection device B is provided with three sensors of PH, electric conductivity and turbidity.

[0017] Further, the blowdown cooling tank is provided at the top with a steam exhaust pipe and a pressure gauge, the tank body is provided with a drain pipe connected to a blowdown cooling pool, and the bottom is provided with a blowdown valve connected to a drain ditch.

[0018] Further, the condensate water main and the deaerator are provided with a boiler room hot water tank, and the outlet of the boiler room hot water tank is provided with a hot water pump; the hot water pump and the deaerator are further provided with an electric regulating valve group B, the electric regulating valve group B comprises two pipelines which are arranged in parallel, one of the pipelines is sequentially provided with a stop valve, an electric regulating valve and a stop valve; the other pipeline is provided with a stop valve, and the deaerator is provided with a liquid level sensor, and the liquid level sensor signal is fed back to the electric regulating valve group B.

[0019] Further, the deaerator is provided with a safety valve and a vent valve at the top, an overflow pipe is connected to a drain ditch at the middle and upper part, and a blowdown valve is arranged at the bottom; a feed water pump group is arranged at the water outlet of the bottom of the deaerator, and the feed water pump group comprises a stop valve, a feed water pump and a pressure gauge, and is used for providing feed water for the boiler.

[0020] Further, a waste heat recovery water pipe is further arranged and connected to the exhaust steam recovery device.

[0021] The low-temperature condensate water and the medium-temperature cooling water enter the pipe layer of the exhaust steam recovery device 54, the production condensate water enters the shell layer of the exhaust steam recovery device 54, the production condensate water pipe 42 is accompanied by a gas-liquid two-phase state, the production condensate water at 120 DEG C exchanges heat with the low-temperature condensate water and the medium-temperature cooling water in the exhaust steam recovery device 54, the outlet temperature of the production condensate water drops to 90 DEG C, the temperature of the low-temperature condensate water and the medium-temperature cooling water rises to 90 DEG C, so that the flash steam is eliminated, and the pure liquid state fluid conveying is realized. The low-temperature condensate water and the medium-temperature cooling water are combined into one after passing through the exhaust steam recovery device 54 and are conveyed to the boiler room hot water tank 7 through the condensate water main.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] (I) through the recovery treatment of the condensate water of the tobacco processing production process and the air conditioning condensate water, the high and low temperature condensate water eliminates the flash steam in the high temperature condensate water by means of the exhaust steam recovery device, all condensate water realizes closed recovery and reaches the effect of single-phase flow conveying, finally recycles the high-quality condensate water for the boiler, effectively reduces the consumption of deaerated steam, reduces the carbon dioxide emission, and improves the thermal efficiency of the steam supply and use system.

[0024] (II) the whole recovery system is isolated from the atmosphere, and there is no oxygen, so oxygen corrosion does not occur in the return water pipeline, the service life of the pipeline is prolonged, and the water quality is affected due to the high iron ion content caused by oxygen corrosion. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The system connection schematic diagram of the utility model is shown in the figure.

[0026] In the figure:

[0027] 1 - power center boiler room, 11 - boiler room cylinder, 12 - boiler steam, 13 - production steam pipe,

[0028] 14 - air conditioning steam pipe, 15 - deoxygenation steam pipe, 151 - electric regulating valve group A;

[0029] 2 - joint workshop air conditioning machine room, 21 - air conditioning cylinder, 22 - air conditioning unit, 23 - air conditioning condensate pipe; 3 - power center deoxygenation room, 31 - deoxygenator, 32 - feed water pump group;

[0030] 4 - cut tobacco workshop, 41 - steam equipment, 42 - production condensate pipe;

[0031] 5 - power center condensate recovery station, 51 - low temperature condensate recovery system, 511 - low temperature condensate recovery

[0032] device, 512 - filter device A, 513 - condensate detection device A, 52 - high temperature condensate recovery system, 521 - high temperature condensate recovery device, 522 - filter device B, 523 - condensate detection device B, 53 - blowdown cooling tank, 54 - exhaust steam recovery device;

[0033] 6 - cylinder condensate pipe;

[0034] 7 - boiler room hot water tank, 71 - hot water pump, 72 - electric regulating valve group B;

[0035] 8 - waste heat recovery water pipe. DETAILED DESCRIPTION

[0036] As Figure 1 shown, the utility model embodiment is as follows:

[0037] A closed condensate recovery system for cigarette factory process, comprising: power center boiler room 1, joint workshop air conditioning machine room 2, power center deoxygenation room 3, cut tobacco workshop 4 and power center condensate recovery station 5.

[0038] The power center boiler room 1 is provided with a boiler room cylinder 11. The boiler steam 12 enters the boiler room cylinder 11 and is divided into three outlets, i.e. a production steam pipe 13, an air conditioning steam pipe 14 and an oxygen removal steam pipe 15. Stop valves are installed on the steam inlet and outlet pipes of the boiler room cylinder 11 for opening and closing control of the steam. A pressure gauge is installed on the boiler room cylinder 11 for displaying the real-time pressure. A drain valve is installed at the bottom of the boiler room cylinder 11 for discharging the condensed water generated in the cylinder. A pressure reducing valve is arranged before the oxygen removal steam pipe 15 enters an oxygen removal device 31. The steam pressure entering the oxygen removal device 31 is controlled at 0.4 Mpa to prevent damage to the internal parts of the oxygen removal device 31 due to excessively high pressure. The oxygen removal steam after pressure reduction is provided with an electric regulating valve group A 151. The electric regulating valve group A includes two pipes arranged in parallel. One pipe is provided with a stop valve, an electric regulating valve and a stop valve in sequence. The other pipe is provided with a stop valve. A pressure sensor is arranged in the oxygen removal device 31 and connected with the electric regulating valve group A 151. The electric regulating valve group A 151 automatically adjusts according to the signal feedback of the pressure sensor in the oxygen removal device 31 to ensure that the pressure in the oxygen removal device 31 is constant at 0.02 Mpa. The production steam pipe 13 provides the required steam for the cut tobacco process equipment. The air conditioning steam pipe 14 provides steam for an air conditioning cylinder 21. A pressure reducing valve is arranged on the air conditioning steam pipe 14 to control the steam pressure at 0.3 Mpa to provide constant pressure steam for air conditioning heating and humidification.

[0039] The air conditioning cylinder 21 and an air conditioning unit 22 are arranged in the combined workshop air conditioning machine room 2. The steam output pipes of the air conditioning cylinder 21 are an air conditioning heating steam pipe and an air conditioning humidification steam pipe. Stop valves are installed on the steam inlet and outlet pipes of the air conditioning cylinder 21 for opening and closing control of the steam. A pressure gauge is installed on the air conditioning cylinder 21 for displaying the real-time pressure. A drain valve is installed at the bottom of the air conditioning cylinder 21 for discharging the condensed water generated in the cylinder. The air conditioning humidification steam pipe is connected to the air conditioning unit 22. The steam directly contacts the air through a nozzle to realize isothermal humidification. No condensed water is generated in the humidification process. The air conditioning heating steam pipe is connected to the heat exchange coil of the air conditioning unit 22. The air contacts the heat exchange coil to realize heating. The steam after passing through the heat exchange coil generates 60℃ medium temperature condensed water which is discharged through a drain valve and enters an air conditioning condensed water pipe 23.

[0040] The condensate water generated by the boiler house cylinder 11 is collected into the air conditioning condensate water pipe 23 and then enters the low-temperature condensate water recovery device 511 on both sides. A safety valve and a pressure gauge are arranged at the top of the low-temperature condensate water device to prevent overpressure and display the pressure in real time. An electric pump is arranged at the bottom of the device, and a check valve and a stop valve are installed after the electric pump. The low-temperature condensate water is pressurized by the electric pump and then enters the filtering device A 512. A blowdown valve is installed at the bottom of the filtering device A 512 to discharge the impurities in the filtered water into a sewage ditch. A 0.1-um wire-precision gauze is arranged inside the filtering device A 512 to effectively remove suspended solids, rust and other impurities in the water. A condensate water detection device A 513 is arranged after the filtering device A 512. The detection device is equipped with PH, conductivity and turbidity sensors. When the condensate water does not meet the requirements, the electric three-way valve after the detection device will automatically discharge the condensate water into the blowdown cooling tank 53 through the drain pipe. The qualified condensate water enters the exhaust steam recovery device 54.

[0041] The process steam equipment 41 of the silk making workshop 4 is connected to the production steam pipe 13 to supply steam. The condensate water generated by the steam equipment 41 is connected to the production condensate water pipe 42 through the drain valve group. The production condensate water is collected into the production condensate water pipe 42 and then enters the exhaust steam recovery device 54. The medium-temperature cooling water generated by the remaining production machines enters the exhaust steam recovery device 54 through the waste heat recovery water pipe 8.

[0042] The low-temperature condensate water and the medium-temperature cooling water enter the pipe layer of the exhaust steam recovery device 54, and the production condensate water enters the shell layer of the exhaust steam recovery device 54. Since the temperature of the production condensate water is 120°C, the production condensate water pipe 42 is accompanied by a gas-liquid two-phase state. The production condensate water at 120°C exchanges heat with the low-temperature condensate water and the medium-temperature cooling water in the exhaust steam recovery device 54, and the outlet temperature of the production condensate water drops to 90°C. The temperature of the low-temperature condensate water and the medium-temperature cooling water rises to 90°C, thereby eliminating the flash steam and realizing the delivery of pure liquid state fluid. The low-temperature condensate water and the medium-temperature cooling water are combined into one after passing through the exhaust steam recovery device 54 and are delivered to the boiler house hot water tank 7 through the condensate water main pipe.

[0043] The production condensate passes through the production condensate recovery device 54 and enters the high-temperature condensate recovery device 521 through the production condensate pipe 42. A safety valve and a pressure gauge are arranged at the top of the high-temperature condensate device for preventing overpressure and displaying the pressure in real time. An electric pump is arranged at the bottom of the device, and a check valve and a stop valve are arranged after the electric pump. The high-temperature condensate enters the filtering device B 522 after being pressurized by the electric pump. A blowdown valve is arranged at the bottom of the filtering device B 522 for discharging the impurities after filtering into a drain. A wire-precision 0.1um filter cotton is arranged inside the filtering device B 522 for effectively removing suspended solids, rust and other impurities in the water. The filtering device B 522 is provided with a condensate detection device B 523. The detection device is provided with three sensors of PH, conductivity and turbidity. When the condensate indicators are unqualified, the electric three-way valve after the detection device will automatically discharge the condensate into the blowdown cooling tank 53, and the qualified condensate enters the condensate main pipe. A steam pipe and a pressure gauge are arranged at the top of the blowdown cooling tank 53. A drain pipe is arranged in the middle of the blowdown cooling tank 53 and connected to a blowdown cooling pool. A blowdown valve is arranged at the bottom and connected to a drain pipe and connected to a drain.

[0044] All the condensate enters the boiler house hot water tank 7 through the condensate main pipe. A hot water pump 71 is arranged at the outlet of the boiler house hot water tank 7. The hot water enters the deaerator 31 after being pressurized by the hot water pump 71. An electrically adjusted regulating valve group B is arranged before the hot water enters the deaerator 31. The electrically adjusted regulating valve group B 72 includes two parallelly arranged pipelines. One pipeline is provided with a stop valve, an electrically adjusted regulating valve and a stop valve in sequence. The other pipeline is provided with a stop valve. A liquid level sensor in the deaerator 31 is connected to the electrically adjusted regulating valve group B 72. The regulating valve realizes automatic adjustment according to the signal feedback of the liquid level sensor in the deaerator 31, so as to ensure the constant liquid level in the deaerator 31. A safety valve and a vent valve are arranged at the top of the deaerator 31. An overflow port is arranged in the upper part of the deaerator 31 for automatically overflowing to the drain when the deaerator 31 is full. A blowdown valve is arranged at the bottom of the deaerator 31 for discharging the impurities at the bottom of the deaerator 31. A feed water pump group 32 is arranged at the water outlet at the bottom of the deaerator 31 for providing feed water for the boiler.

[0045] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A closed-loop condensate recovery system for a cigarette factory process, characterized in that, include: The power center boiler room (1) includes a boiler room steam distribution cylinder (11) for outputting boiler steam (12) to the production steam pipe (13), the air conditioning steam pipe (14) and the deaeration steam pipe (15) respectively; The combined workshop air conditioning room (2) includes an air conditioning steam cylinder (21), an air conditioning unit (22), and an air conditioning condensate pipe (23). The air conditioning steam pipe (14) is connected to the air conditioning steam cylinder (21). The air conditioning steam cylinder (21) outputs the steam input from the air conditioning steam pipe (14) to the air conditioning heating steam pipe and the air conditioning humidifying steam pipe respectively. The air conditioning humidifying steam pipe is connected to the air conditioning unit (22) to humidify the output air. The air conditioning heating steam pipe is connected to the heat exchange coil inside the air conditioning unit (22) to heat the output air of the air conditioning unit (22). The air conditioning heating steam pipe is connected to the air conditioning condensate pipe (23). The deaerator room (3) of the power center is equipped with a deaerator (31), and the deaerator steam pipe (15) is connected to the deaerator (31); The silk-making workshop (4) includes a steam-using equipment (41) and a production condensate pipe (42). The production steam pipe (13) is connected to the steam-using equipment (41) and provides steam to it. The steam-using equipment (41) generates condensate which enters the production condensate pipe (42) for transportation. The power center condensate recovery station (5) includes a low-temperature condensate recovery system (51), a high-temperature condensate recovery system (52), a wastewater cooling tank (53), and a waste steam recovery device (54); the waste steam recovery device (54) is connected to the high-temperature condensate recovery system (52), the low-temperature condensate recovery system (51), and the production condensate pipe (42), respectively; the waste steam recovery device (54) is connected to the deaerator (31) through the condensate main pipe; the low-temperature condensate recovery system (51) is connected to the air conditioning condensate pipe (23) and the wastewater cooling tank (53), and the low-temperature condensate recovery system (51) recovers the condensate from the... The condensate in the air conditioning condensate pipe (23) is then output to the waste steam recovery device (54) or the wastewater cooling tank (53). The low-temperature condensate recovery system (51) inputs the condensate in the waste steam recovery device (54) and outputs it to the condensate main pipe. The high-temperature condensate recovery system (52) is connected to the wastewater cooling tank (53) and the condensate main pipe respectively. The production condensate pipe (42) inputs the condensate in the waste steam recovery device (54) and outputs it to the high-temperature condensate recovery system (52). The condensate in the high-temperature condensate recovery system (52) is output to the condensate main pipe or the wastewater cooling tank (53).

2. The closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: The boiler room steam distribution cylinder (11) and the air conditioning steam distribution cylinder (21) are respectively provided with a steam distribution cylinder condensate pipe (6) connected to the air conditioning condensate pipe (23), and a drain valve is provided on the steam distribution cylinder condensate pipe (6).

3. The closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: A pressure reducing valve and an electric regulating valve group A (151) are sequentially arranged between the deaerator steam pipe (15) and the deaerator (31); the electric regulating valve group A (151) includes two pipelines arranged in parallel, one of which is sequentially equipped with a shut-off valve, an electric regulating valve and a shut-off valve; the other is equipped with a shut-off valve, and a pressure sensor is installed inside the deaerator (31).

4. A closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: A pressure reducing valve is installed on the air conditioning steam pipe (14); the steam inlet and outlet pipes of the air conditioning steam distribution cylinder (21) and the boiler room steam distribution cylinder (11) are both equipped with shut-off valves; and pressure gauges are installed on the air conditioning steam distribution cylinder (21) and the boiler room steam distribution cylinder (11).

5. A closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: The low-temperature condensate recovery system (51) includes a low-temperature condensate recovery device (511), a filter device A (512), and a condensate detection device A (513). The low-temperature condensate recovery device (511) is equipped with a safety valve and a pressure gauge at the top and an electric pump at the bottom. The air conditioning condensate pipe (23) is connected to the low-temperature condensate recovery device (511). The condensate in the low-temperature condensate device passes through the filter device A (512) and the condensate detection device A (513) in sequence. The condensate detection device A (513) is connected to the exhaust steam recovery device (54) and the wastewater cooling tank (53) respectively. The filter device A (512) is equipped with a wastewater valve at the bottom. The condensate detection device A (513) is equipped with three sensors: pH, conductivity, and turbidity.

6. A closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: The high-temperature condensate recovery system (52) includes a high-temperature condensate recovery device (521), a filter device B (522), and a condensate detection device B (523). The high-temperature condensate recovery device (521) is equipped with a safety valve and a pressure gauge at the top and an electric pump at the bottom. The production condensate pipe (42) is connected to the high-temperature condensate recovery device (521). The condensate in the high-temperature condensate recovery device (521) passes through the filter device B (522) and the condensate detection device B (523) in sequence. The condensate detection device B (523) is connected to the condensate main pipe and the sewage cooling tank (53) respectively. The filter device B (522) is equipped with a sewage valve at the bottom. The condensate detection device B (523) is equipped with three sensors: pH, conductivity, and turbidity.

7. A closed-loop condensate recovery system for a cigarette factory as described in any one of claims 1, 5, and 6, characterized in that: The top of the sewage cooling tank (53) is equipped with a steam exhaust pipe and a pressure gauge; the tank body is equipped with a drain pipe connected to the sewage cooling pool; and the bottom is equipped with a sewage valve connected to the drainage ditch.

8. A closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: A boiler room hot water tank (7) is provided between the condensate main pipe and the deaerator (31), and a hot water pump (71) is provided at the outlet of the boiler room hot water tank (7); an electric regulating valve group B (72) is also provided between the hot water pump (71) and the deaerator (31), the electric regulating valve group B (72) includes two pipelines arranged in parallel, one of which is provided with a shut-off valve, an electric regulating valve and a shut-off valve in sequence; the other is provided with a shut-off valve, and a liquid level sensor is provided inside the deaerator (31).

9. A closed-loop condensate recovery system for a cigarette factory as described in claim 8, characterized in that: The deaerator (31) is equipped with a safety valve and a vent valve at the top, an overflow pipe connected to a drainage ditch in the middle and upper part, and a drain valve at the bottom; a water supply pump group (32) is installed at the bottom outlet of the deaerator (31), which consists of a shut-off valve, a water supply pump and a pressure gauge, and is used to supply water to the boiler.

10. A closed-loop condensate recovery system for a cigarette factory as described in claim 1, characterized in that: Waste heat recovery water pipe (8) is also provided and connected to the waste steam recovery device (54).

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