Segmented stirring and heating drying kettle

Abstract

The drying kettle comprises a kettle body and a stirring shaft, an upper dehydration area, a middle dehydration area and a lower dehydration area are sequentially arranged in the kettle body from top to bottom, and a first hinge type stirring paddle, a second hinge type stirring paddle and a helical ribbon type stirring paddle are respectively installed on the stirring shaft. The first hinge type stirring paddle, the second hinge type stirring paddle and the helical ribbon type stirring paddle are correspondingly located in the upper-layer dehydration area, the middle-layer dehydration area and the lower-layer dehydration area respectively, the outer walls of the upper-layer dehydration area, the middle-layer dehydration area and the lower-layer dehydration area are correspondingly sleeved with an upper spiral half pipe, a middle spiral half pipe and a lower spiral half pipe respectively, hot water serves as a heating medium in the upper spiral half pipe and the middle spiral half pipe, and steam serves as a heating medium in the lower spiral half pipe. The stirring kettle can meet the requirement for stirring strength under different liquid level and viscosity conditions, can meet the requirement for heat required by material dehydration, cannot cause the phenomenon that materials are coked on the inner wall of the kettle body due to liquid level drop, and is suitable for drying and dehydration of high-viscosity and easily-coked materials.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field, concretely is a kind of drying kettle of sectional stirring and heating, it is applicable to high viscosity, easy coking material drying dehydration. BACKGROUND

[0002] Drying kettle is a kind of common drying equipment, it is mainly through heating and vacuum environment to remove the moisture in material, widely used in chemical industry etc.

[0003] At present, the stirring shaft in the existing drying kettle is installed with same several stirring paddles from top to bottom, although it has good stirring consistency, but it cannot meet the demand of stirring intensity for the material with large viscosity variation in dehydration process.

[0004] In addition, the spiral half pipe outside the existing drying kettle extends from the upper part of kettle body to its bottom directly, passes into heat conducting medium, heats the material inside kettle body by heat exchange, thereby achieving the purpose of material dehydration. However, when temperature requirement is higher than 100 DEG C, steam heating needs to be used, since steam uses top-in and bottom-out mode, the required temperature is often not equal to the actual heating temperature of steam, with the continuous dehydration, after the liquid level in kettle body drops, long-time heating can easily cause material coking phenomenon on the inner wall of kettle body, and the coking material falls into material after falling off, thereby affecting product quality. SUMMARY

[0005] The utility model aims at overcoming the defects and deficiencies of prior art, and provides a kind of drying kettle of sectional stirring and heating, to meet the demand of stirring intensity under different liquid level and viscosity condition, and, meet the heat demand required by material dehydration, and will not cause material coking phenomenon on the inner wall of kettle body due to liquid level drop, applicable to the drying dehydration of high viscosity, easy coking material.

[0006] To realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A kind of drying kettle of sectional stirring and heating, including kettle body and stirring shaft, it is characterized by: the inside of kettle body is sequentially upper dehydration zone, middle dehydration zone and lower dehydration zone from top to bottom, the stirring shaft is respectively installed with first folding leaf type stirring paddle, second folding leaf type stirring paddle and spiral belt type stirring paddle, first folding leaf type stirring paddle, second folding leaf type stirring paddle and spiral belt type stirring paddle are respectively located in upper dehydration zone, middle dehydration zone and lower dehydration zone, the outer wall of upper dehydration zone, middle dehydration zone and lower dehydration zone is respectively correspondingly equipped with upper spiral half pipe, middle spiral half pipe and lower spiral half pipe, the upper spiral half pipe, middle spiral half pipe are with hot water as heating medium, and the lower spiral half pipe is with steam as heating medium.

[0008] Further, the outer wall of the upper dehydration zone, the middle dehydration zone and the lower dehydration zone is respectively provided with an upper sight glass, a middle sight glass and a lower sight glass, which are respectively used for observing the liquid level of the internal material.

[0009] Further, the hot water inlet of the upper spiral half pipe and the middle spiral half pipe is located at the lower side, and the hot water outlet is located at the upper side.

[0010] Further, the steam inlet of the lower spiral half pipe is located at the upper side, and the steam condensate outlet is located at the lower side.

[0011] Further, the kettle body is provided with a frequency conversion motor at the top, which is used for driving the rotation of the stirring shaft.

[0012] Further, the kettle body is provided with a frequency conversion motor at the top, which is used for driving the rotation of the stirring shaft.

[0013] Compared with the prior art, the kettle body has the advantages that:

[0014] 1. The kettle body is provided with a frequency conversion motor at the top, which is used for driving the rotation of the stirring shaft.

[0015] 2. The kettle body is provided with a frequency conversion motor at the top, which is used for driving the rotation of the stirring shaft. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the kettle body is shown in the structure of the kettle body.

[0017] Figure 2 The structure of the kettle body is shown in the structure of the kettle body. Figure One .

[0018] Figure 3 The structure of the kettle body is shown in the structure of the kettle body. Figure Two . DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, belong to the scope of protection of the present application.

[0020] Referring to Figures 1-3 A kind of sectional stirring and heating dry still, including still body 1 and stirring shaft 2, the inside of still body 1 is sequentially from top to bottom upper dehydration zone 3, middle dehydration zone 4 and lower dehydration zone 5, first folding vane stirring paddle 6, second folding vane stirring paddle 7 and screw belt stirring paddle 8 are respectively installed on stirring shaft 2, first folding vane stirring paddle 6, second folding vane stirring paddle 7 and screw belt stirring paddle 8 are respectively located in upper dehydration zone 3, middle dehydration zone 4 and lower dehydration zone 5, the outer wall of upper dehydration zone 3, middle dehydration zone 4 and lower dehydration zone 5 is respectively correspondingly sleeved with upper spiral half pipe 9, middle spiral half pipe 10 and lower spiral half pipe 11, upper spiral half pipe 9 and middle spiral half pipe 10 are all with hot water as heating medium, and lower spiral half pipe 11 is with steam as heating medium.

[0021] In the present application, upper sight glass 12, middle sight glass 13 and lower sight glass 14 are respectively installed on the outer wall of upper dehydration zone 3, middle dehydration zone 4 and lower dehydration zone 5, so as to observe the liquid level height of the material in the inside of still body 1.

[0022] In the present application, the hot water inlets 19 of upper spiral half pipe 9 and middle spiral half pipe 10 are all located at the lower side, and the hot water outlets 20 are all located at the upper side.

[0023] Therefore, the hot water enters from the lower side and exits from the upper side, providing segmented heating, i.e. providing hot water heating for upper dehydration zone 3 and middle dehydration zone 4, ensuring the supply of heat and also ensuring that the temperature of the still wall does not exceed the temperature, so that the material coking phenomenon does not occur on the inner wall of still body 1 due to the decrease of liquid level.

[0024] In the present application, the steam inlet 21 of lower spiral half pipe 11 is located at the upper side, and the steam condensate outlet 22 is located at the lower side.

[0025] Therefore, the steam enters from the upper side and exits from the lower side, providing steam heating for lower dehydration zone 5, ensuring the final temperature requirement of material dehydration.

[0026] In the present application, a frequency conversion motor 15 is installed at the top of still body 1, so as to drive stirring shaft 2 to rotate.

[0027] In the present application, a feeding port 16 and a discharging port 17 are respectively arranged at the top end and the bottom end of still body 1.

[0028] In addition, the side wall of the kettle body 1 is provided with a thermometer 18 at the position corresponding to the upper dehydration zone 3, the middle dehydration zone 4 and the lower dehydration zone 5, so that the temperature can be monitored in real time.

[0029] The utility model will be further described in connection with the drawings:

[0030] The material is fed from the feeding port 16, and the feeding is stopped when the liquid level of the material reaches the upper sight glass 12; the variable frequency motor 15 is started to drive the stirring shaft 2 to rotate for stirring.

[0031] The inside of the kettle body 1 is vacuumized to-0.08MPa, the valves at the hot water inlet 19 and the hot water outlet 20 of the upper spiral half pipe 9 and the middle spiral half pipe 10 are opened, 95℃ hot water is introduced for heating, and the material starts to be heated and dehydrated.

[0032] When the liquid level of the material drops to the middle sight glass 13, the valves at the steam inlet 21 and the steam condensate outlet 22 of the lower spiral half pipe 11 are opened, 0.3MPa low-pressure steam is introduced for heating, and the dehydration is continued.

[0033] When the liquid level of the material drops to the lower sight glass 14, the kettle body 1 is kept warm by the hot water heating mode, and the small amount of water in the material is completely removed by the steam heating mode, and the rotating speed of the stirring shaft 2 is adjusted according to the viscosity of the material.

[0034] In the early dehydration process, the material has high water content and low viscosity, and is prone to violent boiling during dehydration, so the stirring intensity is required to be high, and therefore the folding blade stirring paddle is used for stirring in the upper dehydration zone 3 and the middle dehydration zone 4; in the later dehydration process, the material has low water content and high viscosity, and therefore the spiral belt stirring paddle is used for stirring in the lower dehydration zone 5. That is, the utility model adopts the stirring combination of the upper and middle folding blade stirring paddles + the lower spiral belt stirring paddle + the variable frequency motor, which meets the requirements of high water content and large viscosity variation in the production process.

[0035] The utility model adopts the three-section spiral half pipe heating mode, that is, 95℃ hot water is used as the heating medium in the upper and middle layers, and the dehydration is carried out under the condition of negative pressure-0.08MPa, the two sections of hot water ensure sufficient heat, and the inner wall of the kettle body 1 will not be dry due to the decrease of the liquid level in the kettle, so that coking caused by dry burning is avoided; 0.3MPa low-pressure steam is used in the lower layer to ensure that the kettle temperature can be raised to 110℃ and the water content is qualified. That is, the utility model realizes temperature control by using the sectional heating mode, which not only ensures the temperature and heat supply, but also avoids coking caused by the over-high temperature of the inner wall of the kettle body 1.

[0036] The dehydrated material is discharged through the discharge port 17.

[0037] Although the present specification is described in terms of embodiments, not every embodiment exhibits every characteristic or implements every combination of features described in the specification. In addition, the description of the specification is not meant to bind the inventors to a particular interpretation of the description. Rather, the specification is meant to provide a number of examples of embodiments of the present application and the description is merely exemplary of the principles of the application. Accordingly, the scope of the present application is not meant to be limited to the embodiments described in the specification. Rather, the scope of the present application is meant to include any embodiment that falls within the scope of the claims.

[0038] The above description is merely illustrative of the embodiments of the present application and is not intended to limit the scope of the application. Rather, the scope of the present application is defined by the appended claims.

Claims

1. A drying vessel for segmented stirring and heating, comprising a vessel body and a stirring shaft, characterized in that: The interior of the vessel body consists of an upper dehydration zone, a middle dehydration zone, and a lower dehydration zone from top to bottom. A first folding-blade agitator, a second folding-blade agitator, and a ribbon agitator are respectively installed on the stirring shaft. The first folding-blade agitator, the second folding-blade agitator, and the ribbon agitator are respectively located in the upper dehydration zone, the middle dehydration zone, and the lower dehydration zone. An upper spiral half-pipe, a middle spiral half-pipe, and a lower spiral half-pipe are respectively fitted on the outer wall of the upper dehydration zone, the middle dehydration zone, and the lower dehydration zone. The upper spiral half-pipe and the middle spiral half-pipe use hot water as the heating medium, and the lower spiral half-pipe uses steam as the heating medium.

2. The drying kettle with segmented stirring and heating according to claim 1, characterized in that: The upper, middle, and lower dehydration zones are equipped with upper, middle, and lower sight glasses, respectively, which are used to observe the liquid level of the internal materials.

3. The drying kettle with segmented stirring and heating according to claim 1, characterized in that: The hot water inlets of both the upper and middle spiral half-pipes are located on the lower side, while the hot water outlets are located on the upper side.

4. The drying kettle with segmented stirring and heating according to claim 1, characterized in that: The steam inlet of the lower spiral half-pipe is located on the upper side, and the steam condensate outlet is located on the lower side.

5. A drying kettle with segmented stirring and heating according to claim 1, characterized in that: A variable frequency motor is installed on the top of the vessel body to drive the stirring shaft to rotate.

6. A drying kettle with segmented stirring and heating according to claim 1, characterized in that: The top and bottom of the vessel are respectively provided with a feed inlet and a discharge outlet.

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