Powder material drying system

Abstract

The utility model relates to powder material production technical field discloses a kind of powder material drying system, including drying tower, steam generating device, cleaning fan, steam inlet pipe, purging pipe and drain pipe.The one end of steam inlet pipe is communicated with drying tower, and the other end is communicated with steam generating device.The one end of purging pipe is communicated with cleaning fan, and the other end is connected and communicated with steam inlet pipe, and first connecting point is formed, and first cleaning valve is equipped on purging pipe.Drain pipe is connected and communicated with steam inlet pipe, and second connecting point is formed, and second cleaning valve is equipped on drain pipe, and first connecting point and second connecting point are spaced along the length direction of steam inlet pipe distribution.Thereby, cleaning fan can send air to steam inlet pipe, so that condensed water in steam inlet pipe is discharged from drain pipe, avoid steam inlet pipe to carry condensed water when delivering steam to drying tower for fire extinguishing and produce secondary harm, so that steam fire extinguishing process is safer, improve the safety of powder material drying system.

Description

Technical Field

[0001] This utility model relates to the field of powder material production technology, and in particular to a powder material drying system. Background Technology

[0002] In the production of powdered materials such as starch, the drying towers used for heating and drying these materials pose an extremely high risk of combustion and explosion. While detonation devices are typically used to passively release material and internal pressure, reducing the risk of explosion, they cannot detect or extinguish fires in their initial stages. Manual firefighting is required after the detonation devices detonate, resulting in slow response and significant losses. Conventional water-based firefighting methods are unsuitable for powdered materials. When water is sprayed into the high-temperature, sealed drying tower, it instantly generates a large amount of steam, which expands rapidly. This violent steam flow agitates the starch deposited inside the tower, creating a high-concentration cloud of flammable and explosive dust. If this dust cloud comes into contact with an open flame, hot surface, or electrical spark, it can trigger a catastrophic secondary dust explosion, causing severe equipment damage, electrical leaks, and other secondary hazards.

[0003] In related technologies, steam is used for fire extinguishing. Steam is an inert gas, and its main mechanism of action is to dilute the oxygen concentration, allowing it to quickly occupy the enclosed space where the fire is burning, reducing the oxygen concentration below the flammability limit, thereby extinguishing the flames. Steam is much gentler than water jet fire extinguishing. Saturated steam condenses upon contact with the burning material, releasing a large amount of latent heat, thus lowering the temperature of the combustible material below its ignition point. This gentle cooling process does not produce violent steam expansion and dust, resulting in high safety. However, existing steam fire extinguishing systems typically carry a certain amount of condensate in the initial stage of fire suppression. This condensate can enter the high-temperature, enclosed drying tower and come into contact with powdered materials, potentially causing secondary hazards. Therefore, the safety of steam fire extinguishing systems needs to be improved. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing steam fire extinguishing systems typically carry a certain amount of condensate in the early stages of fire extinguishing, which can easily cause secondary hazards and compromise safety.

[0005] To solve the above-mentioned technical problems, this utility model provides a powder material drying system, comprising: Drying tower, steam generating unit, cleaning fan; A steam inlet pipe, one end of which is connected to the drying tower and the other end of which is connected to the steam generating device; A purge pipe, one end of which is connected to the cleaning fan and the other end of which is connected to the steam inlet pipe and forms a first connection point, and a first cleaning valve is provided on the purge pipe; A drain pipe is connected to and communicates with the steam inlet pipe, forming a second connection point. A second cleaning valve is provided on the drain pipe. The first connection point and the second connection point are distributed at intervals along the length direction of the steam inlet pipe.

[0006] According to one embodiment of the present invention, the first connection point is closer to the drying tower than the second connection point.

[0007] According to one embodiment of the present invention, a first switching valve is provided on the steam inlet pipe, and the first switching valve is located between the first connection point and the second connection point.

[0008] According to one embodiment of the present invention, the drying tower is provided with a steam inlet on its peripheral wall, the steam inlet pipe is connected to the steam inlet, and the powder material drying system further includes an anti-clogging cover, which is disposed on the steam inlet and can rotate relative to the peripheral wall of the drying tower to open or close the steam inlet.

[0009] According to one embodiment of the present invention, it further includes a cover body, the cover body being connected to the inner wall of the drying tower, the cover body protruding from the inner wall of the drying tower, the anti-blocking cover being rotatably connected to the cover body, the anti-blocking cover, the steam inlet and the inner wall of the drying tower being able to enclose and form a protective cavity, the steam inlet being located within the protective cavity.

[0010] According to one embodiment of the present invention, the lower side of the anti-blocking cover is rotatably connected to the lower side wall of the cover body, so that the anti-blocking cover can be flipped downward.

[0011] According to one embodiment of the present invention, the anti-clogging cover disposed on the steam inlet is inclined in the vertical direction.

[0012] According to one embodiment of the present invention, a steam hot air blower is also included, which is connected to the steam generating device, and the air outlet of the steam hot air blower is connected to the drying tower.

[0013] Compared with the prior art, the powder material drying system of this utility model has the following advantages: The powder material drying system of this utility model has a purge pipe and a drain pipe spaced apart along the length of the steam inlet pipe. The purge pipe is connected to a cleaning fan, so that the cleaning fan blows air into the steam inlet pipe, causing the condensate in the steam inlet pipe to be discharged from the drain pipe. This avoids secondary hazards caused by condensate being carried into the drying tower when the steam inlet pipe is used for fire extinguishing, making the steam fire extinguishing process safer and improving the safety of the powder material drying system. Attached Figure Description

[0014] Figure 1This is one of the structural schematic diagrams of the powder material drying system provided in the embodiments of this utility model.

[0015] Figure 2 This is the second schematic diagram of the structure of the powder material drying system provided in this embodiment of the utility model.

[0016] Figure 3 This is a partial structural schematic diagram of the drying tower provided in an embodiment of the present invention.

[0017] Figure label: 110. Drying tower; 111. Steam inlet; 112. Anti-clogging cover; 113. Cover; 114. Explosion relief device; 115. Feed pipe; 116. Discharge pipe; 117. Protective chamber; 120. Steam inlet pipe; 121. First switching valve; 122. Second switching valve; 123. Pressure sensor; 130. Purge pipe; 131. First cleaning valve; 132. First connection point; 133. Cleaning fan; 140. Drain pipe; 141. Second cleaning valve; 142. Second connection point; 150. Steam generating device; 160. Steam hot air blower; 170. Control device; 171. Temperature sensor; 172. Spark sensor; 173. Displacement sensor. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0019] In the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0021] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0022] like Figure 1 As shown, a powder material drying system according to an embodiment of the present invention includes a drying tower 110, a steam generating device 150, a cleaning fan 133, a steam inlet pipe 120, a purging pipe 130, and a drain pipe 140.

[0023] Specifically, the drying tower 110 has a feed pipe 115 and a discharge pipe 116. The material enters the drying tower 110 through the feed pipe 115 for drying and is discharged through the discharge pipe 116. One end of the steam inlet pipe 120 is connected to the drying tower 110, and the other end is connected to the steam generating device 150. One end of the purge pipe 130 is connected to the cleaning fan 133, and the other end is connected to and communicates with the steam inlet pipe 120, forming a first connection point 132. A first cleaning valve 131 is provided on the purge pipe 130. The drain pipe 140 is connected to and communicates with the steam inlet pipe 120, forming a second connection point 142. A second cleaning valve 141 is provided on the drain pipe 140. The first connection point 132 and the second connection point 142 are distributed at intervals along the length of the steam inlet pipe 120.

[0024] When combustion occurs inside the drying tower 110, steam is supplied to the drying tower 110 through the steam generating device 150 and the steam inlet pipe 120. The steam quickly fills the interior of the burning drying tower 110, diluting the oxygen concentration below the flammability limit, thereby extinguishing the flame. When the steam pipe is not in operation, the residual steam inside will form condensate. This condensate will be carried into the drying tower 110 during the next steam supply. When the condensate enters the high-temperature, sealed drying tower 110, it will instantly generate a large amount of water vapor, which expands rapidly and can easily trigger a dust explosion, causing significant damage. By installing a cleaning fan 133 and a purge pipe 130, gas is periodically blown into the steam inlet pipe 120 to remove the condensate, which is then discharged through the drain pipe 140. This avoids the steam inlet pipe 120 blowing condensate into the drying tower 110 during steam extinguishing, making the steam extinguishing process safer and improving the safety of the powder material drying system. The first cleaning valve 131 and the second cleaning valve 141 are normally closed. When it is necessary to clean the condensate in the steam inlet pipe 120, the first cleaning valve 131 and the second cleaning valve 141 are opened. In some embodiments, the first connection point 132 is located near the connection between the steam inlet pipe 120 and the drying tower 110, so that the purging gas can purge as much as possible into the interior of the steam inlet pipe 120 and carry away as much condensate as possible from the steam inlet pipe 120. Further, the purging pipe 130 can be connected to the steam inlet pipe 120 at an angle, such that the angle between the purging pipe 130 and the portion of the steam inlet pipe 120 near the drying tower 110 is an acute angle, so that the purging pipe 130 blows gas into the steam inlet pipe 120 in a direction away from the drying tower 110, so that the condensate in the steam inlet pipe 120 flows to the drain pipe 140 and is discharged.

[0025] According to the powder material drying system of this utility model embodiment, by arranging a purge pipe 130 and a drain pipe 140 at intervals along the length of the steam inlet pipe 120, and with the purge pipe 130 connected to a cleaning fan 133, the cleaning fan 133 blows air into the steam inlet pipe 120, causing the condensate in the steam inlet pipe 120 to be discharged from the drain pipe 140. This avoids secondary hazards caused by condensate being carried into the drying tower 110 when the steam inlet pipe 120 is used for fire extinguishing, making the steam fire extinguishing process safer and improving the safety of the powder material drying system.

[0026] According to some embodiments of this utility model, the powder material drying system further includes a steam hot air blower 160, which is connected to a steam generating device 150. The outlet of the steam hot air blower 160 is connected to the drying tower 110. Steam is supplied to the steam hot air blower 160 through the steam generating device 150, and the steam hot air blower 160 can provide hot air to the drying tower 110 for drying the powder material. Steam is also supplied to the steam inlet pipe 120 and the steam hot air blower 160 through the steam generating device 150 for fire extinguishing or to provide hot air to the drying tower 110 for drying.

[0027] According to some embodiments of the present invention, the first connection point 132 is closer to the drying tower 110 than the second connection point 142. When cleaning the steam inlet pipe 120, the air in the steam inlet pipe 120 blows from the end closer to the drying tower 110 to the end farther away from the drying tower 110, causing the condensate to flow in the direction away from the drying tower 110, preventing the condensate from flowing into the drying tower 110 and preventing condensate residue at the connection between the steam inlet pipe 120 and the drying tower 110. In some embodiments, the first connection point 132 is located close to the connection between the steam inlet pipe 120 and the drying tower 110, and a first switching valve 121 is provided on the steam inlet pipe 120, located between the first connection point 132 and the second connection point 142. When the second cleaning valve 141 and the first switching valve 121 are closed and the first cleaning valve 131 is opened, air can be blown into the drying tower 110 by the cleaning fan 133 to blow away the powder material at the connection between the steam inlet pipe 120 and the drying tower 110, so as to avoid the connection between the steam inlet pipe 120 and the drying tower 110 being blocked.

[0028] like Figure 3 As shown, according to some embodiments of the present invention, a steam inlet 111 is provided on the peripheral wall of the drying tower 110, and a steam inlet pipe 120 is connected to the steam inlet 111. The powder material drying system also includes an anti-clogging cover 112, which is placed over the steam inlet 111. When the drying tower 110 is operating normally, the anti-clogging cover 112 covers the steam inlet 111 to prevent powder material from entering the steam inlet pipe 120. The anti-clogging cover 112 can rotate relative to the peripheral wall of the drying tower 110 to open or close the steam inlet 111. When the steam inlet pipe 120 supplies steam into the drying tower 110, the steam can push the anti-clogging cover 112 open. In some embodiments, one side of the anti-clogging cover 112 can be rotatably connected to the peripheral wall of the drying tower 110 via a hinge. The anti-clogging cover 112 can be flat.

[0029] According to some embodiments of this utility model, the powder material drying system further includes a cover 113, which is connected to the inner wall of the drying tower 110 and can be welded to the inner wall of the drying tower 110. The cover 113 protrudes from the inner wall of the drying tower 110, and an anti-blocking cover 112 is rotatably connected to the cover 113. The anti-blocking cover 112, the steam inlet 111, and the inner wall of the drying tower 110 can enclose a protective cavity 117, with the steam inlet 111 located within the protective cavity 117. Specifically, on the inner wall surface of the drying tower 110, the cover 113 extends around the steam inlet 111. When the anti-blocking cover 112 approaches the steam inlet 111 and rests on the cover 113, a protective cavity 117 is formed between the inner wall of the drying tower 110, the cover 113, and the anti-blocking cover 112, thereby separating the steam inlet 111 from the powder material inside the drying tower 110 and reducing the probability of the powder material falling into the steam inlet pipe 120. In some embodiments, the lower side of the anti-clogging cover 112 is rotatably connected to the lower side wall of the cover 113 so that the anti-clogging cover 112 can be flipped downwards to reduce the accumulation of powder material at the connection between the anti-clogging cover 112 and the cover 113, and to make it easier to push the anti-clogging cover 112 open. During fire extinguishing, the anti-clogging cover 112 is more easily pushed open by steam, and the opened anti-clogging cover 112 flips downwards to avoid blocking the steam inlet 111 and affecting the steam flow.

[0030] According to some embodiments of this utility model, the anti-clogging cover 112, which is disposed on the steam inlet 111, is inclined in the vertical direction. Specifically, as shown... Figure 3 As shown, the cover 113 is distributed horizontally and below the steam inlet 111. When the anti-clogging cover 112 is placed on the steam inlet 111, the lower side of the anti-clogging cover 112 rests on the lower side wall of the cover 113, and the upper side of the anti-clogging cover 112 rests on the inner wall of the drying tower 110, so that the anti-clogging cover 112 gradually moves away from the inner wall of the drying tower 110 from the upper side to the lower side. The anti-clogging cover 112 is tilted on the steam inlet 111, so that after the powder material falls on the anti-clogging cover 112, it slides down the anti-clogging cover 112, avoiding the accumulation of powder material at the steam inlet 111. In some embodiments, the steam inlet pipe 120 is provided with a pressure sensor 123. The pressure sensor 123 can be specifically located on the side of the first connection point 132 near the drying tower 110. The pressure sensor 123 can detect the pressure inside the steam inlet pipe 120. After the powder material drying system has been running for a period of time, the first cleaning valve 131 is opened, and the second cleaning valve 141 and the first switching valve 121 are kept closed. The cleaning fan 133 blows air into the steam inlet 111 through the purge pipe 130 to clean the steam inlet 111. At the same time, the pressure sensor 123 detects the pressure in the steam inlet pipe 120 so that the staff can determine whether the steam inlet 111 is blocked.

[0031] The powder material drying system also includes a control device 170, a temperature sensor 171, a spark sensor 172, and a displacement sensor 173. The control device 170 is communicatively connected to the temperature sensor 171, spark sensor 172, and displacement sensor 173. A second switching valve 122 is also provided on the steam inlet pipe 120, located at the connection between the steam inlet pipe 120 and the steam generating device 150. The drying tower 110 is equipped with an explosion relief device 114, which has an explosion relief disc. When combustion or explosion occurs inside the drying tower 110, the pressure inside the drying tower 110 rises sharply, causing the explosion relief disc to open. The displacement sensor 173 is located on the explosion relief device 114 and can detect the position of the explosion relief disc. The temperature sensor 171 and the spark sensor 172 are both located on the drying tower 110. The temperature sensor 171 is used to detect the temperature inside the drying tower 110, and the spark sensor 172 is used to detect whether a spark is generated inside the drying tower 110. When the displacement sensor 173 detects that the detonator has shifted, or the spark sensor 172 detects that a spark has been generated inside the drying tower 110, or the temperature sensor 171 detects that the temperature inside the drying tower 110 exceeds a certain value, the control device 170 controls the second switch valve 122 and the first switch valve 121 to open, so that steam can quickly enter the drying tower 110 to dilute the oxygen, extinguish the flame, and release latent heat to reduce the temperature of the combustible material below the ignition point.

[0032] The working process of the powder material drying system in this application is as follows: like Figure 2 As shown in the diagram, solid arrows indicate the flow path of steam, and hollow arrows indicate the flow path of air blown by the cleaning blower 133. During normal operation, the first switching valve 121, the second switching valve 122, the first cleaning valve 131, and the second cleaning valve 141 are all closed. Material enters the drying tower 110 through the feed pipe 115. Steam generated by the steam generator 150 is delivered to the steam hot air blower 160, enabling the steam hot air blower 160 to dry the material inside the drying tower 110. When maintenance is required on the steam inlet pipe 120, the first cleaning valve 131, the first switching valve 121, and the second cleaning valve 141 are opened. The cleaning blower 133 blows air into the purge pipe 130. The air flows along the purge pipe 130 into the steam inlet pipe 120 and then along the steam inlet pipe 120 to the drain pipe 140 (e.g., ...). Figure 2(As indicated by the hollow arrow), this blows the condensate in the steam inlet pipe 120 into the drain pipe 140 for discharge. After cleaning the condensate, the first switch valve 121 and the second cleaning valve 141 are closed, and the cleaning blower 133 continuously blows air into the blow pipe 130. At this time, the air flows towards the steam inlet 111. By detecting the pressure in the steam inlet pipe 120 through the pressure sensor 123, the operator can determine whether the steam inlet pipe 120 and the steam inlet 111 are blocked, so as to clean them in time. When it is necessary to clean the steam inlet 111, the wind speed of the cleaning blower 133 can be increased to push the anti-clogging cover 112 away from the steam inlet 111, so that the powder material on the anti-clogging cover 112 falls off.

[0033] When combustion occurs inside the drying tower 110, the first switching valve 121 and the second switching valve 122 open, allowing steam from the steam generating device 150 to enter the steam inlet pipe 120 and push open the anti-blocking cover 112 at the steam inlet 111, so that it flows into the drying tower 110 (e.g., Figure 2 (As indicated by the solid arrow in the middle), thereby extinguishing the flame and lowering the temperature of the combustible material below its ignition point.

[0034] In summary, this utility model provides a powder material drying system. By arranging a purge pipe 130 and a drain pipe 140 at intervals along the length of the steam inlet pipe 120, and with the purge pipe 130 connected to a cleaning fan 133, the cleaning fan 133 blows air into the steam inlet pipe 120, causing the condensate in the steam inlet pipe 120 to be discharged through the drain pipe 140. This avoids secondary hazards caused by condensate being carried into the drying tower 110 when steam is delivered from the steam inlet pipe 120 for fire extinguishing, making the steam fire extinguishing process safer and improving the safety of the powder material drying system.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit it. It should be pointed out that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A powder material drying system, characterized in that, include: Drying tower (110), steam generating device (150), cleaning fan (133); Steam inlet pipe (120), one end of which is connected to the drying tower (110) and the other end of which is connected to the steam generating device (150); A purge pipe (130) is provided, one end of which is connected to the cleaning fan (133) and the other end is connected to the steam inlet pipe (120) to form a first connection point (132). A first cleaning valve (131) is provided on the purge pipe (130). A drain pipe (140) is connected to and communicates with the steam inlet pipe (120) to form a second connection point (142). A second cleaning valve (141) is provided on the drain pipe (140). The first connection point (132) and the second connection point (142) are distributed at intervals along the length direction of the steam inlet pipe (120).

2. The powder material drying system according to claim 1, characterized in that, The first connection point (132) is closer to the drying tower (110) than the second connection point (142).

3. The powder material drying system according to claim 2, characterized in that, The steam inlet pipe (120) is provided with a first switching valve (121), which is located between the first connection point (132) and the second connection point (142).

4. The powder material drying system according to claim 1, characterized in that, The drying tower (110) has a steam inlet (111) on its peripheral wall. The steam inlet pipe (120) is connected to the steam inlet (111). The powder material drying system also includes an anti-clogging cover (112), which is placed on the steam inlet (111) and can rotate relative to the peripheral wall of the drying tower (110) to open or close the steam inlet (111).

5. The powder material drying system according to claim 4, characterized in that, It also includes a cover (113), which is connected to the inner wall of the drying tower (110). The cover (113) protrudes from the inner wall of the drying tower (110). The anti-blocking cover (112) is rotatably connected to the cover (113). The anti-blocking cover (112), the steam inlet (111), and the inner wall of the drying tower (110) can enclose a protective cavity (117). The steam inlet (111) is located inside the protective cavity (117).

6. The powder material drying system according to claim 5, characterized in that, The lower side of the anti-blocking cover (112) is rotatably connected to the lower side wall of the cover (113) so that the anti-blocking cover (112) can be flipped downward.

7. The powder material drying system according to claim 5, characterized in that, The anti-clogging cover (112) installed on the steam inlet (111) is inclined in the vertical direction.

8. The powder material drying system according to claim 1, characterized in that, It also includes a steam hot air blower (160), which is connected to the steam generating device (150), and the air outlet of the steam hot air blower (160) is connected to the drying tower (110).

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