Steam lock breaking device for steam in thin plate body of drum-type cut-tobacco dryer

Abstract

The utility model relates to a steam lock breaking device in a thin plate body of a drum-type cut-tobacco dryer, which belongs to the field of tobacco processing equipment and comprises a steam circulation jet pump with a control valve, a steam circulation jet pump valve electric positioner, a steam-water separation tank, a drain valve, a stop valve, a filter, a check valve, a steam pipeline and the like. The steam circulating jet pump is provided with three interfaces, namely a cut-tobacco dryer sheet body steam supply interface A, a circulating steam interface G and a cut-tobacco dryer sheet body steam inlet interface B; a condensate water outlet D of the cut tobacco dryer is connected to an inlet E of the steam-water separation tank; an outlet H of the steam-water separation tank is connected with a drain valve; an outlet F of the steam-water separation tank is connected with a steam circulation jet pump interface G; the steam lock in the thin plate body can be broken under the condition that steam is not directly exhausted, stable control over the temperature of the cut-tobacco dryer roller thin plate and smooth discharging of condensate water are guaranteed, and meanwhile the heat exchange efficiency of the thin plate body and the steam utilization rate are improved.

Description

Technical Field

[0001] The utility model belongs to the field of tobacco processing equipment, and specifically relates to a steam breaking and locking device inside a thin plate of a drum-type thin plate tobacco dryer. Background Technique

[0002] At present, the drum-type thin plate tobacco dryer is one of the key equipment in the cigarette making and silk reeling production line, and is used for drying tobacco (stem) silk. Its main technological tasks are to remove part of the water from the leaf (stem) silk to meet the requirements of subsequent processing; to remove the green and miscellaneous odors through drying, to improve and enhance the sensory quality of the leaf (stem) silk, to make the tobacco (stem) silk expand and take shape, loose and curly, and to improve the filling ability and processability of the tobacco (stem) silk.

[0003] When the tobacco dryer is in production, the tobacco (stem) silk enters the drying cylinder from the front chamber feed port through the front-end conveying equipment and flies along the geometric trajectory. Since the axis of the drying cylinder is inclined at an angle of 3° - 5° to the horizontal plane, under the rotation of the drying cylinder, the tobacco (stem) silk tumbles forward in the drying cylinder until it falls from the rear chamber discharge port. When the tobacco (stem) silk moves forward in the drum, it is dried through two ways:

[0004] One is to send steam through the rotary joint to the heat exchange device in the drying cylinder. The heat exchange device is of a thin plate structure. On the one hand, it heats the tobacco (stem) silk, and on the other hand, it also plays the role of conveying the tobacco (stem) silk, making the tobacco (stem) silk tumble up and down;

[0005] The other is to form process hot air by passing steam through the heat exchanger and blow it into the drying cylinder from the front chamber or the rear chamber. Its flow direction is the same as or opposite to the movement direction of the tobacco (stem) silk. Through the way of co-current or counter-current, it fully contacts with the tobacco (stem) silk to ensure uniform drying of the tobacco (stem) silk. Due to the rapid temperature rise of the tobacco (stem) silk in the drum, the evaporated moisture, miscellaneous odors and dust in the tobacco (stem) silk are discharged through the dust removal system with hot air as the carrier, and the whole process runs continuously in a cycle.

[0006] When the variety, moisture content and flow rate of the tobacco (stem) silk change, the best tobacco drying effect can be achieved by adjusting the steam pressure, hot air temperature, hot air volume and drying cylinder rotation speed. The whole tobacco drying process is continuously and automatically carried out.

[0007] During the operation of the tobacco dryer, like all drum drying equipment, the drain system of the tobacco dryer is "siphon drainage", and there will inevitably be a "steam lock" phenomenon during the discharge of condensate, which is determined by the structure of the tobacco dryer: the steam inlet and the condensate outlet of the tobacco dryer are on the same side, and the supply of steam and the discharge of condensate are realized through the rotary joint, which will cause the "steam lock" phenomenon to occur at any time.

[0008] Once the "siphon hydrophobic" of the drying cylinder of the cut tobacco dryer has the phenomenon of "steam lock", the condensate cannot be discharged in time through the steam trap, and the temperature of the thin plate wall will drop, resulting in the out-of-control moisture of the cut tobacco (stem) at the outlet of the cut tobacco dryer.

[0009] To eliminate the poor hydrophobicity caused by the "steam lock", it is necessary to break the "steam lock". There are two main ways to break the steam lock:

[0010] One is to cool the steam causing the steam lock and condense it into liquid water, that is, cool it into condensate and discharge it. This method has poor drainage in time, and the moisture of the cut tobacco (stem) at the outlet of the cut tobacco dryer will fluctuate, resulting in product quality accidents.

[0011] The other is to artificially cause a small leakage in the steam trap, so that the "steam lock" cannot be formed. This method will cause steam waste and at the same time increase the back pressure behind the steam trap, affecting the normal operation of other hydrophobic systems. Summary of the Invention

[0012] In order to overcome the problems existing in the background technology, the utility model provides a steam breaking steam lock device in the thin plate body of a drum type cut tobacco dryer: without changing the structure of the cut tobacco dryer, only adding devices such as a steam circulation jet pump and a steam-water separator with valve control between the steam supply and condensate discharge of the thin plate body of the cut tobacco dryer can solve the problem of "steam lock" of the steam in the thin plate body of the drum type cut tobacco dryer.

[0013] To achieve the above object, the utility model is realized by the following technical solutions:

[0014] A steam breaking steam lock device in the thin plate body of a drum type cut tobacco dryer, the device includes a steam circulation jet pump, a steam-water separator connected to the drying cylinder of the cut tobacco dryer through a rotary joint of the cut tobacco dryer, and a pipeline for connection;

[0015] The steam circulation jet pump includes three steam jet pump interfaces A, B, and G, which are respectively connected to the steam supply interface of the thin plate body of the cut tobacco dryer, the steam inlet rotary joint interface C of the thin plate body of the cut tobacco dryer, and the circulating steam interface F of the steam-water separator;

[0016] An electric positioner of the steam circulation jet pump is also arranged on the pipeline of the device, and the electric positioner of the steam circulation jet pump is connected to compressed air and receives the control signal of the thin plate body steam supply of the cut tobacco dryer PLC.

[0017] Further, the steam-water separator is vertically arranged, and the water outlet H of the steam-water separator is located at the bottom end of the tank body.

[0018] Further, the rotary joint is right-in and left-out, with steam entering from the right interface C and condensate discharging from the left interface D.

[0019] Further, a stop valve, a filter, a steam trap, and a check valve are successively installed on the pipeline connected to the water outlet H of the steam-water separation tank.

[0020] Further, the circulating steam interface F of the steam-water separation tank is arranged at the top of the tank body and is connected to the steam jet pump interface G.

[0021] Further, an interface E for connecting to the rotary joint interface D of the condensate water outlet of the thin plate body of the cut tobacco dryer is also arranged on the tank body of the steam-water separation tank, for conveying the condensate water into the steam-water separation tank to realize steam-water separation.

[0022] Further, the outlet of the steam trap is connected to a condensate water recovery device or a trench.

[0023] The working principle of the present utility model: When the equipment operates, the main steam enters the rotary joint through the outlet B of the steam circulating jet pump 1, then disperses the thin plate body in the cut tobacco dryer drum 8, heats the thin plate to dry the cut tobacco (stem) through heat exchange of the thin plate body, and the latent heat of the steam is exchanged and condensed into condensate water. The condensate water is discharged from the condensate water outlet D of the rotary joint 9 of the cut tobacco dryer to the interface E of the steam-water separation tank 3, and the condensate water realizes steam-water separation in the steam-water separation tank 3. The separated secondary steam is drawn into the interface G of the steam circulating jet pump 1 through the circulating steam interface F at the top of the steam-water separation tank 3, mixed with the main steam, and then enters the thin plate in the cut tobacco dryer drum 8 again for heat exchange to realize circulation. At the same time, the steam that may generate "steam lock" is broken, thus achieving the purpose of the device of the present utility model.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model adopts a steam circulating jet pump with control valves and a steam-water separation tank, connects the steam inlet control valve of the thin plate body of the cut tobacco dryer and the steam trap to form a closed loop, which can prevent the formation of "steam lock" when the cut tobacco dryer discharges condensate water, thereby realizing stable control of the temperature of the thin plate wall of the cut tobacco dryer, that is, ensuring the stability of the moisture content of the cut tobacco (stem); at the same time, the closed-loop system also increases the flow rate of steam in the thin plate body wall, improves the heat exchange efficiency, and also achieves the purpose of energy conservation and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a layout schematic diagram of the present utility model

[0026] Figure 2 It is the front view of the present utility model

[0027] Figure 3 It is a structural schematic diagram of another perspective of the present utility model

[0028] Figure 4 It is a structural schematic diagram of the present utility model;

[0029] In the figure, 1 is a steam circulation jet pump, 2 is an electrical positioner of the steam circulation jet pump, 3 is a steam-water separation tank, 4 is a stop valve, 5 is a filter, 6 is a check valve, 7 is a steam trap, 8 is a drum of a cut tobacco dryer, 9 is a rotary joint, and 10 is a pipeline. Specific embodiments

[0030] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0031] Example 1: As Figure 1 shown, a steam breakage lock device in the thin plate body of a drum-type cut tobacco dryer, the device includes a steam circulation jet pump 1 (including an actuator) with a control valve, an electrical positioner 2 of the steam circulation jet pump, a steam-water separation tank 3, a stop valve 4, a filter 5, a steam trap 7, a check valve 6, and a steam pipeline 10; the electrical positioner 2 of the steam jet pump is connected to the PLC control signal and compressed air of the cut tobacco dryer; the interface A of the steam circulation jet pump 1 is connected to the steam supply interface of the thin plate body of the cut tobacco dryer; the interface G of the steam circulation jet pump 1 is connected to the circulating steam interface F of the steam-water separation tank 3; the interface B of the steam circulation jet pump 1 is connected to the steam inlet interface C of the rotary joint 9 of the thin plate body of the cut tobacco dryer; the interface E of the steam-water separation tank is connected to the condensate water outlet D of the rotary joint of the thin plate body of the cut tobacco dryer; the outlet H of the steam-water separation tank 3 is connected to the inlet of the steam trap 7; the outlet of the steam trap is connected to the inlet of the condensate water recovery device or the trench, and a stop valve 4 and a filter 5 are arranged on the pipeline 10 between the steam trap 7 and the outlet H of the steam-water separation tank 3.

[0032] When the equipment is running, the main steam enters the rotary joint 9 through the outlet B of the steam circulation jet pump 1 and then disperses the thin plate body in the drum 8 of the cut tobacco dryer. Through heat exchange with the thin plate body, the thin plate is heated to dry the cut tobacco (stem) silk. After the latent heat of the steam is exchanged, it condenses into condensate water. The condensate water is discharged from the condensate water outlet D of the rotary joint 9 of the cut tobacco dryer to the interface E of the steam-water separation tank 3. The condensed water realizes steam-water separation in the steam-water separation tank 3. The separated secondary steam is drawn in through the circulating steam interface F at the top of the steam-water separation tank 3 by the interface G of the steam circulation jet pump 1, mixed with the main steam, and enters the thin plate in the drum 8 of the cut tobacco dryer again for heat exchange, realizing circulation, and at the same time breaking the steam that may generate a "steam lock", thereby achieving the purpose of the device of the present utility model.

[0033] At the same time, the closed-loop system also increases the flow velocity of the steam in the thin plate wall, improves the heat exchange efficiency, and also achieves the purpose of energy conservation and consumption reduction.

[0034] Example 2: As Figures 2 - 4A steam breaking and locking device inside the thin plate body of a drum-type tobacco leaf dryer. The breaking and locking structure of this device is connected to the dryer drum 8 through the rotary joint 9 of the tobacco leaf dryer. The rotary joint 9 is connected in a right-in and left-out manner. The right interface C of the joint is the steam inlet interface (i.e., the interface close to the dryer drum 8 is the steam inlet interface C), which is connected to the B interface of the steam circulation injection pump 1 for transmitting steam into the thin plate inside the dryer drum 8 for heat exchange. The left interface D is the condensate outlet interface (i.e., the interface far from the dryer drum 8 is the condensate outlet interface D), which is connected to the interface F on the body of the steam-water separation tank 3 for directly transporting the condensate generated by heat exchange from the dryer drum 8 to the steam-water separation tank 8 for secondary separation. The secondary steam separated is then transported to the steam circulation injection pump 1 for reuse, and the separated condensate is discharged through the steam trap 7.

[0035] It should be understood that the above specific embodiments of the present invention are only used for illustrative explanation or interpretation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modification examples falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A steam breaking and locking device in a thin plate body of a drum-type silk drying machine, characterized in that: The device comprises a steam circulation jet pump (1) connected to a silk drying machine drum (8) via a silk drying machine rotary joint (9), a steam-water separation tank (3) and a pipe (10) for connection; The steam circulation jet pump (1) comprises three steam jet pump interfaces A, B and G, which are respectively connected to the steam supply interface of the thin plate body of the wire drying machine, the interface C of the steam inlet rotary joint (9) of the thin plate body of the wire drying machine and the circulating steam interface F of the steam-water separation tank (3); A steam circulation jet pump electrical positioner (2) is also provided on the pipeline of the device, and the steam circulation jet pump electrical positioner (2) is connected to the compressed air and receives a steam supply control signal of the thin plate body of the tofu drying machine PLC.

2. The steam breaking and locking device in the sheet body of a drum-type tofu drying machine according to claim 1 is characterized in that: The steam-water separation tank (3) is arranged vertically, and the water outlet H of the steam-water separation tank (3) is located at the bottom end of the tank body.

3. The steam breaking and locking device in the sheet body of a drum-type tofu drying machine according to claim 1 is characterized in that: The rotary joint (9) is right-in and left-out, with steam entering through the right interface C and condensed water exiting through the left interface D.

4. The steam breaking and locking device in the sheet body of a drum-type tofu drying machine according to claim 1 is characterized in that: A stop valve (4), a filter (5), a steam trap (7) and a check valve (6) are sequentially installed on the pipeline (10) connected to the water outlet H of the steam-water separation tank (3).

5. The steam breaking and locking device in the sheet body of a drum-type tofu drying machine according to claim 1 is characterized in that: The circulating steam interface F of the steam-water separation tank (3) is arranged at the top of the tank body and is connected to the steam jet pump interface G.

6. The steam breaking and locking device in the sheet body of a drum-type tofu drying machine according to claim 1 is characterized in that: The steam-water separation tank (3) is also provided with an interface E connected to an interface D of a rotary joint (9) for condensed water outlet of the thin plate body of the wire drying machine, and is used for conveying condensed water into the steam-water separation tank (3) to achieve steam-water separation.

7. The steam breaking and locking device in the sheet body of a drum-type tofu drying machine according to claim 4 is characterized in that: The outlet of the steam trap is connected to a condensate recovery device or a ditch.

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