Calcium hydroxide dry production line

Abstract

The utility model discloses a calcium hydroxide dry-process production line, which belongs to the field of calcium hydroxide production equipment and comprises a digestion water adding component, a calcium oxide adding component, a reaction tank and a temperature control component. The temperature control assembly is used for detecting the digestion temperature in the reaction tank, the water supply amount is increased by the digestion water adding assembly when the temperature exceeds a set value, and the water supply amount is reduced by the digestion water adding assembly when the temperature is lower than the set value; the digestion water adding assembly comprises a water flow channel for supplying water, a movable sliding block and a driving mechanism for driving the movable block, a water passing hole is formed in the sliding block, the driving mechanism drives the sliding block to vertically move downwards when the digestion temperature exceeds a set value, and the cross overlapping area between the water passing hole and the water flow channel is increased; conversely, the cross overlapping area is reduced. According to the utility model, the reaction can be well controlled, the production cost is reduced, and large-scale mass production can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcium hydroxide production equipment technical field, concretely is calcium hydroxide dry production line. BACKGROUND

[0002] Current calcium hydroxide production process mainly has wet method and dry method two, because dry method process is simple, and the investment is small, can realize full automatic production, and the production process is environmental protection and has no waste, and the yield is high, and the energy consumption is low, and the quality is stable, and the activity is good and so on, has gradually replaced old wet method production, becomes the most mainstream production and processing technology currently. Generally speaking, dry method production calcium hydroxide, also called lime powder preparation method, is a process flow compared with wet preparation, and the main steps include calcination, digestion two stages, and the characteristic is that almost whole process does not carry out in liquid medium, is conducive to energy saving and simplifies operation. Select high-quality limestone (calcium carbonate CaCO3), after crushing, screening, obtain the granule meeting the size requirement, put limestone granule into high-temperature furnace kiln (such as rotary kiln, shaft furnace etc.), under the condition of 900 DEG C-1200 DEG C, thermal decomposition reaction occurs, and quicklime (calcium oxide CaO) and carbon dioxide (CO2) gas are generated. Then digestion is carried out, namely, after quicklime is discharged from the kiln, appropriate amount of water is added, in this process, only water is added to CaO partial water absorption, and the reaction is not complete, to avoid forming hydrated lime slurry, so that the lime (calcium hydroxide Ca (OH) 2) in powder form is produced. This step needs to accurately control the water quantity and temperature to obtain the product with suitable fineness.

[0003] Therefore, realizing the automatic control of dry method production calcium hydroxide, mainly according to the content of calcium oxide, activity, particle size, water addition, reaction temperature and other key factors, wherein, the key activity, water addition and temperature are the main links of realizing automatic control. Ordinary dry production line mainly relies on the experience of workers to adjust water, and the workers on-site operation is prone to accidents, and the lack of experience can cause production accidents and unstable product quality. Human interference factors are large, and it is extremely dependent on the experience operation of personnel, and the manual input is large, and the production cost is high, and the large-scale production can not be realized. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a kind of calcium hydroxide dry production line, solve human interference factors, reduce personnel operation, reduce manual input, reduce production cost, and can realize large-scale production.

[0005] To achieve the above object, the utility model provides the following technical scheme: a calcium hydroxide dry production line, including digestion water adding component, calcium oxide adding component, reaction tank and temperature control component, digestion water adding component and calcium oxide component respectively join digestion water and calcium oxide in reaction tank, temperature control component is used for detecting digestion temperature in reaction tank, and when temperature exceeds setting value, digestion water adding component increases water supply, when temperature is lower than setting value, digestion water adding component reduces water supply;

[0006] The digestion water adding component includes a water flow channel for water supply and a sliding block moving perpendicularly to the water flow channel, and a driving mechanism for driving the sliding block, wherein the sliding block is provided with a water passing hole, and the driving mechanism drives the sliding block to vertically move downward when the digestion temperature exceeds the setting value, so as to increase the cross-overlapping area between the water passing hole and the water flow channel, and vice versa.

[0007] Further, the sliding block is connected by a hydraulic telescopic rod to drive the sliding block to vertically move upward or downward, and the hydraulic telescopic rod is connected with a controller, which controls the hydraulic telescopic rod to extend or retract when the temperature control component detects a corresponding temperature change, so as to change the cross-overlapping area.

[0008] Further, the digestion water adding component further includes a body, the body has a cavity inside, the sliding block is vertically and slidingly fitted in the cavity, the water passing hole is horizontally arranged in the sliding block, and the water passing hole has the same cross section as the water flow channel, both of which are rectangular.

[0009] Further, the digestion water adding component further includes a threaded sealing cover and a supporting element, the threaded sealing cover is threadedly fitted on the top end of the cavity, the bottom of the threaded sealing cover is oppositely arranged with the top end surface of the sliding block, and the bottom end surface of the sliding block is supported by the supporting element at the bottom of the cavity; the threaded sealing cover is connected with an air inlet pipeline, the gas flowing into the air inlet pipeline can push the sliding block to move downward, so that the pressing force on the supporting element becomes larger and larger, and the cross-overlapping area also becomes larger and larger, until the cross-overlapping area reaches the maximum value, and the supporting element is compressed to the limit.

[0010] Further, the air inlet pipeline is connected with a heat-sensitive balloon, the heat-sensitive balloon is arranged in the reaction tank, when the temperature in the reaction tank is lower than the setting value, the air pressure between the heat-sensitive balloon, the air inlet pipeline and the threaded sealing cover decreases, the sliding block moves upward under the pressing, and the cross-overlapping area is always 0, and vice versa, the air pressure increases, the sliding block moves downward, and the cross-overlapping area gradually increases.

[0011] Further, the top supporting element is a pressure spring, one end of which is connected with the bottom end of the sliding block, and the other end of which is connected with the bottom of the cavity.

[0012] Further, the top supporting element comprises a pair of oppositely arranged magnetic rings, a first magnetic ring is fixed on the bottom end face of the sliding block, and a second magnetic ring is vertically slidably installed on the bottom of the cavity, and the two magnetic rings are in repulsion state.

[0013] Further, the bottom end of the second magnetic ring is fixed with a mounting ring, the bottom end face of the mounting ring is rotatably connected with the end of an adjusting screw, and the adjusting screw is vertically installed at the bottom end of the body in threaded cooperation, so that when the adjusting screw is rotated, the second magnetic ring is moved upward or downward.

[0014] Further, the nut of the adjusting screw is located outside the bottom face of the body, the nut is a cylindrical gear structure, the cylindrical gear structure is engaged with a locking gear sleeve rotatably installed at the bottom end of the body, and the locking gear sleeve is always in engagement with the cylindrical gear structure of the nut within the axial stroke of the adjusting screw when the adjusting screw is rotated.

[0015] Further, a plurality of adjusting screws are simultaneously engaged with the annular array on the inside of the locking gear sleeve, the locking gear sleeve is screwedly screwed on the protrusion in the center of the bottom end of the body in threaded cooperation, and abuts against a compression spring in a annular deep groove outside the protrusion.

[0016] Finally, the utility model also includes an analysis assembly for testing and analyzing the calcium content and activity of calcium oxide, and the test results obtained by the analysis assembly can be input into a production control unit, so that the amount of digestion water can be calculated according to the input value.

[0017] The utility model provides a kind of calcium hydroxide dry process production line, with following beneficial effects: feed and water interlocking control, ensure the stability of digestion water, prevent too little water from causing calcium oxide digestion incomplete, or too much water from causing sticking blockage.Temperature and water interlocking control, ensure that calcium oxide completes reaction in a suitable temperature range, ensure product quality.Feed amount and temperature interlocking control, to ensure accurate water amount, calcium oxide content and activity input provide technical support for production water. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural principle schematic view of the utility model;

[0019] Figure 2 It is a sectional view of digestion water adding assembly of the utility model;

[0020] Figure 3 It is another sectional view of digestion water adding assembly.

[0021] Figure 4 A schematic view of a relative mounting structure of the second magnetic ring and the adjusting bolt.

[0022] In the figure, the sliding block 1, the body 2, the cavity 3, the water flow channel 4, the water passing hole 5, the threaded sealing cover 6, the air inlet pipeline 7, the pressure bearing spring 8a, the magnetic ring 8b, the adjusting bolt 9, the nut 10, the compression spring 11, the protruding part 12, the mounting ring 13, and the locking gear cover 14. DETAILED DESCRIPTION

[0023] The technical solutions in the following examples will be clearly and completely expressed based on the drawings of the embodiments of the utility model, and the embodiments described in the specification are only part of the embodiments of the utility model, not all the embodiments. All other embodiments extended and inspired by the general technical personnel in the art based on these embodiments in the application without creative labor should be within the protection scope of the utility model.

[0024] As Figures 1-2 shown in a kind of calcium hydroxide dry production line, main structure includes digestion water adding component, calcium oxide adding component, reaction tank and temperature control component, the digestion water adding component and calcium oxide component are respectively added to reaction tank inside digestion water and calcium oxide, to obtain calcium hydroxide in production, specifically, the temperature control component is used to detect the digestion temperature in reaction tank, specifically can be temperature sensor cooperation controller controls corresponding valve, in practice, when temperature exceeds set value, digestion water adding component increases water supply, and when temperature is lower than set value, digestion water adding component reduces water supply, reaction is controlled in ideal degree, reaction condition is indirectly controlled by controlling reaction temperature. More specifically, in the embodiment, the digestion water adding component used includes water flow channel 4 for water supply, and sliding block 1 moves vertically to water flow channel 4, for example, water flow channel is horizontal direction, and sliding block 1 is vertically moved. At the same time, there is also driving mechanism for driving moving block, the sliding block 1 in the above is equipped with a water passing hole 5, driving mechanism immediately drives sliding block 1 vertically downward when digestion temperature exceeds set value, can make the cross-over area between water passing hole 5 and water flow channel 4 increase, i.e. flow increases, water supply increases, on the contrary, the driving mechanism drives sliding block 1 to move upwards, so as to make cross-over area decrease, flow reduces.

[0025] The driving mechanism in the above embodiment, specifically, the sliding block 1 is connected by a hydraulic telescopic rod (not shown in the figure) to drive the sliding block 1 to move vertically up or down, which is the most direct method, but it needs to be equipped with a corresponding controller, so that the hydraulic telescopic rod is connected with the controller, when the temperature sensor or other temperature control components detects the temperature change in the above reaction tank, according to the moving principle of the sliding block 1 as described above, the controller controls the hydraulic telescopic rod to move up and down to change the cross-over area to adjust the water supply.

[0026] Finally, the present digestive water adding assembly also includes a body 2, which has a cavity 3 inside, the cavity 3 is smooth in surface, the sliding block 1 is vertically slidingly fitted in the cavity 3, specifically, it can be dynamically sealed and slidingly installed. In addition, the sliding block 1 is horizontally provided with a water passing hole 5, and the water passing hole 5 and the water flow channel 4 are completely the same in cross section, and both are rectangular, which is convenient for calculating the flow change, because the flow channel with rectangular cross section is linearly related to the vertical movement of the sliding block 1, and it is easy to accurately control the size of the adjusted flow.

[0027] As shown in Figure 2 , the present digestive water adding assembly also includes a threaded sealing cover 6, a top supporting element, the threaded sealing cover 6 is threadedly fitted at the top end of the cavity 3, the bottom of the threaded sealing cover 6 is oppositely arranged with the top end surface of the sliding block 1, and the bottom end surface of the sliding block 1 is supported by the top supporting element at the bottom of the cavity 3, so that the water passing hole 5 of the sliding block 1 can keep a non-working state of being constantly disconnected with the water flow channel 4. When manufacturing, the threaded sealing cover 6 is connected with an air inlet pipe 7, and the gas flowing into the air inlet pipe 7 can push the sliding block 1 to move downward, so that the extrusion force on the top supporting element becomes larger and larger, that is, the cross-over area becomes larger and larger, and the cross section of the water flow becomes larger and larger, until the cross-over area reaches the maximum value, at which time the top supporting element is compressed to the limit, and the maximum water supply is reached.

[0028] In specific implementation, the air inlet pipe 7 is connected with a heat-sensitive balloon, the heat-sensitive balloon makes the internal gas expand and flow into the reaction tank through the air inlet pipe 7 due to the heating of the container, and vice versa, that is, the heat-sensitive balloon is located in the reaction tank, when the temperature in the reaction tank is lower than the set value, the air pressure in the heat-sensitive balloon, the air inlet pipe 7 and the sliding block 1 and the threaded sealing cover 6 decreases, and the originally extruded sliding block 1 moves upward due to the decrease of the pressure, so that the originally disconnected positions of the water passing hole 5 and the water flow channel 4 are constantly kept disconnected, that is, the cross-over area is always 0, and vice versa, when the temperature in the reaction tank rises to more than the set value, the air pressure increases enough to make the sliding block 1 move downward, so that the cross-over area gradually increases, and the water supply increases.

[0029] As one of the specific implementation structures, Figure 2As shown, the top supporting element is a pressure spring 8a, one end of which is connected with the bottom end of the sliding block 1, and the other end is connected with the bottom of the cavity 3, so that the sliding block 1 can move up or down when the temperature in the reaction tank changes.

[0030] In view of the unreliability of the spring after long-term use, in the embodiment, as shown, Figure 3 the top supporting element includes a pair of oppositely arranged magnetic rings 8b, i.e. the first magnetic ring is fixed on the bottom end face of the sliding block 1, and the second magnetic ring is vertically slidably installed on the bottom of the cavity 3, and the two magnetic rings are in repulsion state, so that the moving amount of the sliding block 1 and the gradual change rule of the temperature change in the reaction tank can be reliably guaranteed, which is beneficial to accurately control the adjustment of water flow.

[0031] As shown, Figure 4 in the embodiment, the bottom end of the second magnetic ring is fixed with a mounting ring 13, the bottom end face of the mounting ring 13 is rotatably connected with the end of the adjusting screw 9, and the adjusting screw 9 is vertically installed at the bottom end of the body 2 in threaded cooperation, so that when the adjusting screw 9 is rotated, the second magnetic ring is moved up or down. In specific production, the nut 10 of the adjusting screw 9 is located outside the bottom surface of the body 2, the nut 10 is a cylindrical gear structure, or it is a cylindrical gear directly, the cylindrical gear structure is meshed and transmitted with a locking gear sleeve 14 rotatably installed at the bottom end of the body 2 in the form of internal meshing, and within the axial stroke of the adjusting screw 9 during rotation, the locking gear sleeve 14 is always not out of meshing relationship with the cylindrical gear structure of the nut 10, that is, it can keep gear meshing transmission while moving axially.

[0032] As an optimal embodiment, as shown, Figure 4 the inside of the locking gear sleeve 14 is annularly arrayed with a plurality of adjusting screws 9 which are simultaneously meshed with it, the locking gear sleeve 14 is threadedly screwed on the protrusion 12 at the center of the bottom end of the body 2, and abuts against a compression spring 11 in a annular deep groove outside the protrusion 12, so that the stability of the holder can be maintained during the rotation of the locking gear sleeve 14, and the misoperation of the adjusting screw 9 can be avoided.

[0033] The above implementation structure, specific to an application scenario, can be that the calcium oxide laboratory analyzes the calcium content and activity of the calcium oxide after entering the factory, obtains the test results, inputs the results into the corresponding points of the production control unit, and the computer calculates the proportion of the added digestion water according to the input values. After production starts, the planned production quantity of the day is input according to the plan, the computer automatically matches the corresponding water supply quantity according to the activity of the calcium oxide and the calcium point data, and the water supply system automatically adjusts the water valve to control the water flow. When the feeding is stable, the water is supplied quantitatively, if the feeding is reduced or increased, the computer adjusts the water supply proportion according to the reduced or increased quantity, so as to ensure that the digestion water is appropriate, when the feeding quantity fluctuates, the computer gives an alarm, and the temperature control system stops working. When the first-stage digestion temperature and the second-stage digestion holding temperature are within the set range, the automatic temperature control program is started, if the temperature is too high, the water quantity is increased, and if the temperature is reduced, the water quantity is reduced.

[0034] It should be explained here that in the present specification, terms such as first, second, etc. are only used to distinguish one feature from another, and do not mean that there is a certain relationship or order between the technical features. The terms "include" and "contain" mean that there is a certain technical means or feature, and the specific meaning is that there are other existing or non-existing technical features that are not listed. The discussion in the above examples is only a representative example of the present application, and is not the only limited and restricted feature. Those skilled in the art should understand that without departing from the technical content disclosed in all the claims of the present application, some simple replacements and modifications can be made to change or equivalent to other specific embodiments and application scenarios. Regardless of how the embodiments are changed, they will inevitably fall within the scope of protection of the present application.

Claims

1. A dry process line for calcium hydroxide production, characterized by, The invention discloses a device for controlling the temperature of the digestion of calcium oxide, which comprises a digestion water adding component, a calcium oxide adding component, a reaction tank and a temperature control component, wherein the digestion water adding component and the calcium oxide adding component add digestion water and calcium oxide into the reaction tank respectively, and the temperature control component detects the digestion temperature in the reaction tank, and when the temperature exceeds the set value, the digestion water adding component increases the water supply, and when the temperature is lower than the set value, the digestion water adding component reduces the water supply. The digestion water adding component comprises a water flow channel (4) for water supply, a sliding block (1) moving vertically to the water flow channel (4), and a driving mechanism driving the sliding block, wherein the sliding block (1) is provided with a water passing hole (5), and the driving mechanism drives the sliding block (1) to vertically move downward when the digestion temperature exceeds the set value, so as to increase the cross overlapping area between the water passing hole (5) and the water flow channel (4), and vice versa.

2. A dry process line for calcium hydroxide according to claim 1, characterized in that, The sliding block (1) is connected by a hydraulic telescopic rod to drive the sliding block (1) to vertically move upward or downward, and the hydraulic telescopic rod is connected with a controller, which controls the hydraulic telescopic rod to move in extension or retraction when the temperature control component detects the corresponding temperature change, so as to change the cross overlapping area.

3. A dry process line for calcium hydroxide according to claim 1, characterized in that, The digestion water adding component further comprises a body (2) provided with a cavity (3) inside, and the sliding block (1) is vertically and slidingly fitted in the cavity (3), and the water passing hole (5) is horizontally provided in the sliding block (1) and has the same cross section as the water flow channel (4), and both are rectangular.

4. A dry process line for calcium hydroxide according to claim 3, characterized in that, The digestion water adding component further comprises a threaded sealing cover (6) and a supporting element, the threaded sealing cover (6) is threadedly fitted on the top of the cavity (3), the bottom of the threaded sealing cover (6) is oppositely arranged with the top end surface of the sliding block (1), and the bottom end surface of the sliding block (1) is supported by the supporting element on the bottom of the cavity (3), and the threaded sealing cover (6) is connected with an air inlet pipeline (7), and the gas flowing into the air inlet pipeline (7) can push the sliding block (1) to move downward, so that the pressing force on the supporting element becomes larger and larger, and the cross overlapping area also becomes larger and larger, until the cross overlapping area reaches the maximum value, and the supporting element is compressed to the limit.

5. A dry process line for calcium hydroxide according to claim 4, characterized in that, The air inlet pipeline (7) is connected with a heat-sensitive balloon in the reaction tank, and when the temperature in the reaction tank is lower than the set value, the air pressure between the heat-sensitive balloon, the air inlet pipeline (7) and the threaded sealing cover (6) and the sliding block (1) is reduced, the sliding block (1) moves upward under the pressing, and the cross overlapping area is always 0, and vice versa, the air pressure is increased, the sliding block (1) moves downward, and the cross overlapping area is gradually increased.

6. A dry process line for calcium hydroxide according to claim 4, characterized in that, The supporting element is a pressure bearing spring (8a), one end of which is connected with the bottom end of the sliding block (1), and the other end is connected with the bottom of the cavity (3).

7. A dry process line for calcium hydroxide according to claim 4, characterized in that, The top supporting element comprises a pair of oppositely arranged magnetic rings (8b), a first magnetic ring is fixed on the bottom end surface of the sliding block (1), and a second magnetic ring is vertically slidably installed on the bottom of the cavity (3), and the two magnetic rings are in repulsion state.

8. A dry process line for calcium hydroxide according to claim 7, characterized in that, The bottom end of the second magnetic ring is fixed with a mounting ring (13), the bottom end surface of the mounting ring (13) is rotationally connected with the end of an adjusting bolt (9), the adjusting bolt (9) is vertically installed at the bottom end of the body (2) in threaded cooperation, so that when the adjusting bolt (9) is rotated, the second magnetic ring is moved upward or downward.

9. A dry process line for calcium hydroxide according to claim 8, characterized in that, The nut (10) of the adjusting bolt (9) is located outside the bottom surface of the body (2), the nut (10) is a cylindrical gear structure, the cylindrical gear structure is engaged with a locking gear sleeve (14) rotationally installed at the bottom end of the body (2) in meshing form, and within the axial stroke of the adjusting bolt (9) when rotating, the locking gear sleeve (14) is always in meshing relationship with the cylindrical gear structure of the nut (10) without disengaging; The locking gear sleeve (14) has a plurality of adjusting bolts (9) arranged in an annular array on the inside thereof and simultaneously engaged therewith, the locking gear sleeve (14) is threadedly screwed on the protrusion (12) at the center of the bottom end of the body (2), and is in contact with a compression spring (11) in a annular deep groove on the outside of the protrusion (12).

10. A dry process line for calcium hydroxide according to any one of claims 1-9, characterized in that, It also comprises an analysis assembly for analyzing the calcium content and activity of calcium oxide, and the test results obtained by the analysis assembly can be input into a production control unit to calculate the amount of digestion water to be added according to the input values.

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