Condensate water recovery system of cut tobacco dryer

Abstract

The utility model relates to a condensate water recovery system for a cut-tobacco drier, which comprises a steam supply pipeline for providing steam for the cut-tobacco drier; the steam-water separator is provided with a steam inlet, a steam outlet and a water outlet; the steam inlet is connected with a steam supply pipeline; a steam pipeline in the cut tobacco dryer is connected with a steam outlet of the steam-water separator; the steam enters the cut-tobacco drier to be respectively used by a thin plate in the cut-tobacco drier and a hot-air blower; the water collecting tank is provided with a water inlet A and a water outlet A, and condensate water generated in the cut tobacco dryer enters the water collecting tank through the water inlet A after being discharged; the pneumatic pump is provided with an air inlet, a water inlet B and a water outlet B, and a floating ball valve is arranged in the pneumatic pump; a water outlet B of the pneumatic pump is connected with the condensate water recovery pipeline, a water inlet B is connected with the water outlet A, and an air inlet is connected with the compressed air pipeline. The system is provided with the water collecting tank, condensate water generated by the cut tobacco dryer is recycled through the pneumatic pump, and compressed air is adopted as a power source. The overflow port of the water collecting tank further guarantees normal discharge of condensate water, and production is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal pipelines of cigarette production equipment, in particular to a condensed water recovery system for a tobacco drying machine. Background Art

[0002] The silk drying machine is the core section of the production of cigarette factories. It needs to provide steam for the drying machine sheets and hot air blowers. Condensed water will be generated during use. The generated condensed water needs to be continuously discharged through the steam trap to enable the dryer to operate normally. The steam trap pump using traditional pipelines currently has the following problems: 1. The condensed water discharge pipeline of the dryer is not equipped with a relay water collection tank, and is directly connected to the steam trap pump. During the operation of the steam trap pump, the discharge of condensed water generated by the dryer sheets and hot air blowers is hindered. It must enter the pump after the steam trap pump has finished working. Therefore, the steam trap pump needs to be opened and closed intermittently, which has a certain impact on the silk making process. Nowadays, the moisture content of tobacco exported from the silk-making and drying machine is strictly controlled. If the moisture content of tobacco exceeds the standard, it will be judged as unqualified tobacco, causing significant economic losses. At the same time, unstable moisture control of tobacco is the key factor causing yellow spot smoke; 2. When the steam trap pump fails, the condensate cannot be recovered normally. It is necessary to manually judge the fault and directly discharge the condensate to ensure the normal operation of the equipment; 3. Since the condensate temperature generated by the silk-making process equipment is as high as 150℃, and the steam pipeline is drained and recovered to the silk-making condensate main pipe, secondary flash steam will appear in the condensate network, which is actually a two-phase flow. This method will cause steam resistance to increase the back pressure of the process equipment, causing poor drainage of the equipment. Due to the two-phase flow of flash steam and condensate vapor and liquid, water hammer will occur on the pipeline, affecting the service life of the pipeline and valve parts. In order to ensure the stable and efficient operation of the silk-making and drying machine and ensure the smooth discharge of condensate, a condensate recovery system for the drying machine is proposed to avoid the pressure in the condensate pipe and affect the normal and continuous production of the cigarette process, and ensure that the moisture content of the tobacco exported from the drying machine is qualified. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a condensate recovery system for a silk drying machine, which ensures the smooth recovery of condensate generated by the silk drying machine through the cooperation of a water collecting box and an open pneumatic pump, thereby preventing the silk making process from being affected. Specifically, the technical solution of the utility model to achieve the above-mentioned purpose is as follows:

[0004] A condensed water recovery system for a tofu drying machine, comprising:

[0005] Steam supply pipeline, providing steam for the silk drying machine;

[0006] The steam-water separator is provided with a steam inlet, a steam outlet and a drain outlet; the steam inlet of the steam-water separator is connected to the steam supply pipeline, and is used to separate the water in the steam and maintain the steam dryness;

[0007] The internal steam pipe of the wire drying machine is connected to the steam outlet of the steam-water separator; the steam enters the wire drying machine and is used by the thin plate and the hot air blower in the wire drying machine respectively;

[0008] The water collecting tank is provided with a water inlet A and a water outlet A. The two streams of condensed water generated by the thin plate and the hot air blower in the tofu drying machine are discharged and enter the water collecting tank through the water inlet A.

[0009] The pneumatic pump is provided with an air inlet, a water inlet A and a water outlet B, and is provided with a float valve inside; the water outlet B of the pneumatic pump is connected to the condensate recovery pipeline, the water inlet B is connected to the water outlet A, the air inlet is connected to the compressed air pipeline, and compressed air is used as the power source. After the condensate enters the water collecting tank, it flows into the pneumatic pump by gravity. After the liquid level in the pneumatic pump reaches a certain height, the float valve closes the condensate inlet valve, and compressed air is connected as the power source to pump the condensate into the condensate recovery pipeline.

[0010] Furthermore, a steam dryness detection device is provided at the inlet of the steam supply pipeline; a direct supply pipeline connected in parallel with the steam-water separator is provided between the steam supply pipeline and the wire drying machine, and an electric valve is provided on the direct supply pipeline; an electric valve is provided on the pipeline connecting the steam supply pipeline and the steam-water separator.

[0011] Furthermore, a drainage pit is provided; the steam-water separator drainage outlet is respectively provided with a steam pipe trap group and a direct drainage pipeline A, the steam pipe trap is connected to the water inlet A of the water collecting tank, and the direct drainage pipeline A is connected to the drainage pit; the water collecting tank is provided with an overflow port, and the overflow port is connected to the drainage pit; the condensate discharge outlets of the thin plate in the wire drying machine and the hot air blower are respectively provided with a wire drying machine condensate trap group and a direct drainage pipeline B; the direct drainage pipeline A and the direct drainage pipeline B are both provided with stop valves.

[0012] Furthermore, the condensate drain valve group of the wire drying machine includes a stop valve, a filter, an endoscope, a drain valve and a check valve; the condensate drain valve group of the wire drying machine is also provided with a bypass pipe, and the bypass pipe is provided with a stop valve.

[0013] Furthermore, the steam pipe trap valve group includes a stop valve, a filter and a trap valve; the steam pipe trap valve group is also provided with a bypass pipe, and the bypass pipe is provided with a stop valve.

[0014] Furthermore, the compressed air pipeline is provided with a ball valve, a filter and a pressure gauge; the pneumatic pump is also provided with an exhaust gas pipeline, and the exhaust gas pipeline is provided with a ball valve; temperature sensors are respectively provided at the condensed water outlets of the thin plate in the wire drying machine and the hot air blower; and an automatic exhaust valve is provided at the water inlet A.

[0015] Furthermore, a flash steam pipeline is also provided on the top of the water collecting tank.

[0016] After being supplied from the steam supply pipeline 1, the steam first passes through the steam dryness detection device 8. If the dryness meets the standard, it enters the wire drying machine 2 through the direct supply pipeline 34; if the dryness does not meet the standard, it enters the steam-water separator 3 and then enters the wire drying machine 2. The condensed water generated by the steam-water separator 3 enters the water collecting tank 4 through the steam pipeline drain valve group 35. The condensed water generated by the wire drying machine 2 enters the water collecting tank 4 through the wire drying machine condensate drain valve group 21. The condensed water in the water collecting tank 4 flows into the pneumatic pump 5 by gravity. When the liquid level in the pneumatic pump 5 reaches a certain height, the float valve closes, and the compressed air pipeline 7 provides a compressed air power source to pump the condensed water into the condensed water recovery pipeline 6, and the exhaust gas is automatically discharged. After the condensed water enters the water collecting tank 4, the flash steam generated at the top is connected to the flash steam pipeline 44, so as to realize the separation of the gas-liquid two phases. The water collecting tank 4 is provided with an overflow port 43 and the steam is prevented from overflowing by a water seal. The overflow port 43 pipeline of the water collecting tank 4 is connected to the drainage pit 9 together with the direct drainage pipeline A36 and the direct drainage pipeline B22. When starting up, the stop valve of the direct drainage pipeline can be opened for direct discharge in order to quickly warm the pipe.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] This condensate recovery system for silk drying machine uses an open pneumatic pump to recover the condensate generated by the silk drying machine, and the power source is compressed air. If the pneumatic pump group fails, it can be discharged to the ditch through the overflow port of the water collecting tank, which will not cause any impact on the production of the silk making process. The high-temperature condensate water of 150℃ in silk making first enters the open water collecting tank, and the flash steam formed is connected to the other workshops through the flash steam pipeline for utilization. The water inside the water collecting tank is saturated water under atmospheric pressure, which is transported to other workshops through a pneumatic pump. The entire transportation process is a one-way flow, and there is no steam resistance and water hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the system connection method of the utility model;

[0020] In the figure:

[0021] 1—Steam supply pipeline;

[0022] 2—fiber drying machine, 21—condensate drain valve group of fiber drying machine, 22—direct drainage pipeline B;

[0023] 3—steam-water separator, 31—steam inlet, 32—steam outlet, 33—drain outlet, 34—direct supply pipeline, 35—steam

[0024] Steam pipeline trap group, 36-straight drainage pipeline A;

[0025] 4—water collecting tank, 41—water inlet A, 42—water outlet A, 43—overflow port, 44—flash steam pipeline;

[0026] 5—pneumatic pump, 51—water inlet B, 52—water outlet B, 53—exhaust gas pipeline;

[0027] 6—Condensate recovery pipeline; 7—Compressed air pipeline; 8—Steam dryness detection equipment; 9—Drainage pit. DETAILED DESCRIPTION

[0028] like Figure 1 As shown, the embodiments of the utility model are as follows:

[0029] A condensate recovery system for a wire drying machine 2 comprises a steam supply pipeline 1, a steam-water separator 3, a wire drying machine 2, a water collecting tank 4, a pneumatic pump 5 and a drainage pit 9.

[0030] The steam supply pipeline 1 provides steam for the wire drying machine 2. A steam dryness detection device 8 is provided at the inlet of the steam supply pipeline 1. The steam-water separator 3 is provided with a steam inlet 31, a steam outlet 32 ​​and a drain 33; the steam inlet 31 of the steam-water separator 3 is connected to the steam supply pipeline 1, and is used to separate the water in the steam and maintain the steam dryness. A direct supply pipeline 34 connected in parallel with the steam-water separator 3 is provided between the steam supply pipeline 1 and the wire drying machine 2, and an electric valve is provided on the direct supply pipeline 34; an electric valve is provided on the pipeline connecting the steam supply pipeline 1 and the steam-water separator 3.

[0031] The steam pipe inside the wire drying machine 2 is connected to the steam outlet 32 ​​of the steam-water separator 3; the steam enters the wire drying machine 2 and is used by the thin plate and the hot air blower in the wire drying machine 2. The water collecting tank 4 is provided with a water inlet A41 and a water outlet A42. The two streams of condensed water generated by the thin plate and the hot air blower in the wire drying machine 2 are discharged and enter the water collecting tank 4 through the water inlet A41. The condensed water outlets of the thin plate and the hot air blower in the wire drying machine 2 are respectively provided with temperature sensors. A flash steam pipeline 44 is also provided on the top of the water collecting tank 4. An automatic exhaust valve is provided at the water inlet A41.

[0032] The pneumatic pump 5 is provided with an air inlet, a water inlet B51 and a water outlet B52, and a float valve is provided inside; the water outlet B52 of the pneumatic pump 5 is connected to the condensate recovery pipeline 6, the water inlet B51 is connected to the water outlet A42, and the air inlet is connected to the compressed air pipeline 7. With compressed air as the power source, the condensate enters the water collecting tank 4 and flows into the pneumatic pump 5 by gravity. When the liquid level in the pneumatic pump 5 reaches a certain height, the float valve closes the condensate inlet valve, and the compressed air is connected as the power source to pump the condensate into the condensate recovery pipeline 6. The compressed air pipeline 7 is provided with a ball valve, a filter and a pressure gauge; the pneumatic pump 5 is also provided with an exhaust gas pipeline 53, and the exhaust gas pipeline 53 is provided with a ball valve.

[0033] The steam-water separator 3 drain port 33 is provided with a steam pipe trap group 35 and a direct drainage pipeline A36, respectively. The steam pipe trap is connected to the water inlet A41 of the water collecting tank 4, and the direct drainage pipeline A36 is connected to the drainage pit 9; the steam pipe trap group 35 includes a stop valve, a filter and a trap; the steam pipe trap group 35 is also provided with a bypass pipeline, and the bypass pipeline is provided with a stop valve. The water collecting tank 4 is provided with an overflow port 43, and the overflow port 43 is connected to the drainage pit 9; the condensate drain valve group 21 of the wire drying machine and the hot air blower are respectively provided at the condensate discharge port of the thin plate in the wire drying machine 2 and the hot air blower; the direct drainage pipeline A36 and the direct drainage pipeline B22 are both provided with a stop valve. The wire drying machine condensate drain valve group 21 includes a stop valve, a filter, an endoscope, a trap and a check valve; the wire drying machine condensate drain valve group 21 is also provided with a bypass pipeline, and the bypass pipeline is provided with a stop valve.

[0034] After being supplied from the steam supply pipeline 1, the steam first passes through the steam dryness detection device 8. If the dryness meets the standard, it enters the wire drying machine 2 through the direct supply pipeline 34; if the dryness does not meet the standard, it enters the steam-water separator 3 and then enters the wire drying machine 2. The condensed water generated by the steam-water separator 3 enters the water collecting tank 4 through the steam pipeline drain valve group 35. The condensed water generated by the wire drying machine 2 enters the water collecting tank 4 through the wire drying machine condensate drain valve group 21. The condensed water in the water collecting tank 4 flows into the pneumatic pump 5 by gravity. When the liquid level in the pneumatic pump 5 reaches a certain height, the float valve closes, and the compressed air pipeline 7 provides a compressed air power source to pump the condensed water into the condensed water recovery pipeline 6, and the exhaust gas is automatically discharged. After the condensed water enters the water collecting tank 4, the flash steam generated at the top is connected to the flash steam pipeline 44, so as to achieve the separation of the vapor and liquid phases. The water collecting tank 4 is provided with an overflow port 43 and prevents the steam from overflowing through a water seal. The overflow port 43 pipeline of the water collecting tank 4 is connected to the drainage pit 9 together with the direct drainage pipeline A36 and the direct drainage pipeline B22. When the machine is started, the stop valve of the direct drainage pipeline can be opened for direct discharge for quick pipe warming. The bypass pipeline in the steam pipeline trap group 35 and the condensed water trap group 21 of the silk drying machine is temporarily used for emergency use when the trap fails.

[0035] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A condensate water recovery system for a tofu drying machine (2), characterized in that: include: A steam supply pipeline (1) for supplying steam to a silk drying machine (2); The steam-water separator (3) is provided with a steam inlet (31), a steam outlet (32) and a water outlet (33); the steam inlet (31) of the steam-water separator (3) is connected to the steam supply pipeline (1) and is used to separate water from the steam and maintain the steam dryness; The wire drying machine (2) has an internal steam pipe connected to a steam outlet (32) of a steam-water separator (3); the steam enters the wire drying machine (2) and is used by the thin plate and the hot air blower in the wire drying machine (2); The water collecting box (4) is provided with a water inlet A (41) and a water outlet A (42), and two streams of condensed water generated by the thin plate and the hot air blower in the wire drying machine (2) are discharged and enter the water collecting box (4) through the water inlet A (41); The pneumatic pump (5) is provided with an air inlet, a water inlet B (51) and a water outlet B (52), and a float valve is provided inside; the water outlet B (52) of the pneumatic pump (5) is connected to a condensate recovery pipeline (6), the water inlet B (51) is connected to the water outlet A (42), and the air inlet is connected to a compressed air pipeline (7). Compressed air is used as a power source. After the condensate enters the water collecting tank (4), it flows into the pneumatic pump (5) by gravity. After the liquid level in the pneumatic pump (5) reaches a certain height, the float valve closes the condensate inlet valve, and compressed air is connected as a power source to pump the condensate into the condensate recovery pipeline (6).

2. A condensate recovery system for a tofu drying machine (2) as claimed in claim 1, characterized in that: The inlet of the steam supply pipeline (1) is provided with a steam dryness detection device (8); a direct supply pipeline (34) connected in parallel with the steam-water separator (3) is provided between the steam supply pipeline (1) and the wire drying machine (2), and an electric valve is provided on the direct supply pipeline (34); and an electric valve is provided on the pipeline connecting the steam supply pipeline (1) and the steam-water separator (3).

3. A condensate recovery system for a tofu drying machine (2) as claimed in claim 1, characterized in that: A drainage pit (9) is also provided; the drainage outlet (33) of the steam-water separator (3) is respectively provided with a steam pipe trap group (35) and a direct drainage pipeline A (36); the steam pipe trap is connected to the water inlet A (41) of the water collecting tank (4); the direct drainage pipeline A (36) is connected to the drainage pit (9); the water collecting tank (4) is provided with an overflow port (43), and the overflow port (43) is connected to the drainage pit (9); the condensate drainage outlet of the thin plate and the hot air blower in the wire drying machine (2) is respectively provided with a wire drying machine condensate trap group (21) and a direct drainage pipeline B (22); the direct drainage pipeline A (36) and the direct drainage pipeline B (22) are both provided with stop valves.

4. A condensate recovery system for a tofu drying machine (2) as claimed in claim 3, characterized in that: The wire drying machine condensate drain valve group (21) comprises a stop valve, a filter, an endoscope, a drain valve and a check valve; the wire drying machine condensate drain valve group (21) is also provided with a bypass pipeline, and the bypass pipeline is provided with a stop valve.

5. A condensate recovery system for a tofu drying machine (2) as claimed in claim 3, characterized in that: The steam pipeline trap valve group (35) comprises a stop valve, a filter and a trap valve; the steam pipeline trap valve group (35) is also provided with a bypass pipeline, and the bypass pipeline is provided with a stop valve.

6. A condensate recovery system for a tofu drying machine (2) as claimed in claim 1, characterized in that: The compressed air pipeline (7) is provided with a ball valve, a filter and a pressure gauge; the pneumatic pump (5) is also provided with an exhaust gas pipeline (53), and the exhaust gas pipeline (53) is provided with a ball valve; the condensed water outlets of the thin plate and the hot air blower in the wire drying machine (2) are respectively provided with temperature sensors; and the water inlet A (41) is provided with an automatic exhaust valve.

7. A condensate recovery system for a tofu drying machine (2) as claimed in claim 1, characterized in that: A flash steam pipeline (44) is also provided on the top of the water collecting tank (4).

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