RU2389544C2 - Device to product acid gas absorbers - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: proposed invention can be used in charging absorbing cartridges. Proposed device operates as follows: transfer assembly representing conveyor 6 arranged on frame 30 is switched on. Initial product metered flow unit 1 feeds initial product onto substrate. Initial product interacts, with substrate moving, with smoothing assembly 13. Substrate top layer is fed drum 3 onto smoothed initial product surface to be packed by pressure roller 18. Initial product in the form of sandwiched sheet is driven by conveyor 6 into drying unit 7.

EFFECT: production of continuous flexible sheet of absorber, stable technical properties.

7 cl, 14 dwg

Description

The invention relates to the manufacture of acid gas absorbers based on oxides and hydroxides of alkali and alkaline earth metals deposited on a porous substrate and designed to equip absorbent cartridges.

A device for the manufacture of acid gas absorbers is known (RF Patent 2259231, IPC B01J 20/04, 2005), which contains a unit for dosing the initial product, a substrate supply unit, a molding unit, a displacement unit, a drying unit, and a receiving device. In this device, the molding and displacement units are made in the form of perforated plates equipped with longitudinal holes or recesses rotated at an angle to the longitudinal axis of the plate, and the plates are mounted on the displacement unit with the possibility of rotation relative to the horizontal axis and interact with the squeezing roller mounted above the conveying device . Perforated plates are made with holes or with grooves with their mirror arrangement and provided with protrusions equal to the thickness of the plate, which can be made with holes or grooves longer than the width of the processed material. The movement unit is made in the form of a chain conveyor, under the upper branch of which rollers are installed, interacting with perforated plates. The squeeze roll is equipped with protrusions included in the perforation or recesses of the perforated plate.

In the manufacture of absorbers, the porous substrate is impregnated with the starting product. Moreover, the design of the known device allows to obtain the final product only in the form of rigid plates, repeating the configuration of the perforated plates of the molding and displacement unit, which limits the possibility of using such an absorber in the structural elements of protective clothing and absorbent cartridges.

In addition, the known device does not provide a sufficiently uniform supply of the product on the substrate and, accordingly, uniform distribution of the product on the surface of the substrate, which leads to a violation of the stability of the characteristics of the obtained absorber sheet in length and practically does not allow to obtain a flexible sheet.

The objective of the invention is to improve the technical and operational characteristics of the device for producing acid gases.

The technical result of the invention is the ability to obtain a continuous flexible absorber sheet and the stability of technical characteristics along the length of the sheet.

The technical result is achieved in that in a device for the manufacture of acid gas absorbers containing a unit for dosed supply of a starting product, a substrate supply unit, a molding unit, a displacement unit, a drying unit and a receiving device, the substrate supply unit is made in the form of two drums installed in series, wherein a unit for the metered supply of the initial product is installed between the drums, after the second drum an additional roll is installed, the molding unit is made in the form of a support and forming rolls, the forming roll is made with protrusions with a gap relative to each other, located along the forming roll, between the dosed feed unit of the initial product and the second drum, an alignment unit is additionally made, made in the form of a wedge-shaped scraper mounted above the displacement unit, the displacement unit contains a conveyor belt covering the rotation drive connected backup roll forming unit.

The structural embodiment of the device provides the ability to obtain a continuous flexible absorber sheet and the stability of technical characteristics along the length of the sheet, since the absorber sheet continuously passes through all the nodes of the device without being subjected to hard loads that impede the production of a flexible sheet, while during the forming process the initial product is uniformly applied to the substrate as a result of which a constant thickness of the absorber sheet is achieved, which does not change in all nodes of the device, and sheet flexibility remains. The implementation of the leveling unit in the form of a wedge-shaped scraper installed above the moving unit allows for a constant height of the paste-like material and, accordingly, to optimize the subsequent molding of the absorber sheet. The supply of the displacement unit with a conveyor belt covering the support roll of the molding unit connected to the rotation drive provides simplification of the design due to synchronization of the movement of the material being molded and the speed of rotation of the rolls, as well as through the use of a common drive for the conveyor and the molding unit. Performing protrusions on the forming roll with a gap relative to each other and arranging them along the forming roll allows profiling the sheet and reducing its hydraulic resistance due to the formation of channels in the transverse direction of the resulting continuous flexible absorber sheet.

It is advisable to make a device for the metered supply of the initial product in the form of a hopper with a movably installed valve, which will simplify the design of means for the metered supply of the initial product, especially if it has a paste consistency, and at the same time ensure uniform distribution of the paste-like material on the substrate.

Providing the leveling unit with receivers of the initial product can reduce material loss during the formation of the absorber sheet.

The drying unit can be made in the form of infrared emitters installed above the displacement unit, or in the form of electrodes connected to a power source, while the electrodes are made in the form of contact plates interconnected by a dielectric spacer. And in that, and in another case, the maximum efficiency is achieved by reducing heat loss to the surrounding space. In addition, uniform heating of the absorber is ensured during the drying process. At the same time, volumetric drying of the product is ensured with transverse transmission of electric current.

It is recommended to avoid slipping the surface of the roll relative to the surface of the sheet and to ensure high-quality product profiling to perform the surface of the backup roll of the molding unit from an elastic material.

The drawings show:

figure 1 - General view of a device for the manufacture of acid gas absorbers;

figure 2 - node metered supply of the original product;

figure 3 - alignment node, side view;

figure 4 is the same as in figure 3, a top view;

figure 5 is a cross section of the node moving with the product and the cross section of the roll;

Fig.6 - the location of the electrodes on the product to trim, top view;

7 is a cross section of a displacement site in the area of the location of the electrodes;

Fig.8 is a view of the electrode in arrow B, Fig.6;

Fig.9 is the same, view along arrow G;

figure 10 is a cross section of the molding unit;

11 is a cross-section of the backup roll;

12 is a sectional view of a forming roll;

Fig - shows the design of the electrodes in the form of plates;

Fig - option using a drying unit with infrared emitters.

The list of positions:

1 - node metered supply of the starting product;

2 and 3 - drums of the substrate supply unit;

4 - substrate;

5 - molding unit;

6 - node displacement;

7 - drying unit;

8 - receiving device;

9 - hopper;

10 - valve;

11 - flow controller;

12 - source product;

13 - leveling unit;

14 - scraper 4

15 - side;

16 - wedge;

17 - receiver of the original product;

18 - roll;

19 - electrodes;

20 - endless tape;

21 - tension rollers;

22 - pinch rollers;

23 - metal plates;

24 - a support plate;

25 - power supply;

26 - dielectric spacer;

27 - backup roll;

28 - forming roll;

29 - finished product;

30 - frame;

31 - infrared emitter.

A device for the manufacture of acid gas absorbers contains (Fig. 1) a metered supply unit for the initial product 1, a substrate supply unit in the form of a drum 2 and a drum 3 with a substrate 4, a molding unit 5, a conveyance unit in the form of a conveyor 6, a drying unit 7, and a receiving device 8. The unit for the metered supply of the initial product 1 is installed between the reels 2 and 3 and includes (Fig. 2) a hopper 9 equipped with a movably mounted valve 10 and a flow regulator 11. In the hopper 9 the initial product 12 is placed in the form of a paste containing hydroxides sheet and / or alkaline earth metals. A leveling unit 13 is additionally installed between the dosed feed unit of the initial product 1 and the drum 3. The leveling unit 13 is a scraper 14, the sides 15 of which form a wedge 16 in the middle part and are connected at the edges with the receivers of the initial product 17 (Figs. 3 and 4). Behind the leveling unit 13 along the conveyor 6, a roller 18 is mounted, interacting with the conveyor belt 6, pressing the upper layer of the substrate 4 against it (Fig. 5).

Next, along the conveyor 6 placed drying unit 7, made in the form of electrodes 19 (Fig.6). The electrodes 19 can be made in the form of an endless strip 20 of stainless or copper foil, as shown in Fig.6, 7, 8 and 9. The tape 20 interacts with the tension rollers 21 and the pressure rollers 22. The electrodes 19 can be made in the form of metal plates 23, as shown in FIG. In both cases, a support plate 24 is fixed under the conveyor belt 6. The electrodes 19 are connected to the power supply 25. A dielectric spacer 26 is installed between the electrodes shown in FIG. 13.

Next, along the conveyor 6, a molding unit 5 is located, comprising a backup roll 27 (Fig. 10, 11) and a forming roll 28 (Fig. 10, 12). The conveyor belt 6 covers the backup roll 27, made in the form of a rubberized steel pipe. On the forming roll 28 there are protrusions located along the forming roll with a gap relative to each other (Fig. 12).

The finished product 29 arrives at the receiving device 8. All of the above components of the device are mounted on the frame 30. On Fig shows an embodiment of a drying device using ceramic infrared emitters 31, for example, type FSL company "Elstein".

The device operates as follows.

The displacement unit is turned on in the form of a conveyor 6, which, like the other units of the installation, is mounted on the frame 30, and a substrate 4 of fibrous material is laid from the drum 2 from the drum 2. From the metered supply unit of the initial product 1, the initial product 12 is supplied to the substrate 4. The flow rate of the initial product 12 is controlled by the movement of the valve 10 in the hopper 9 by the flow regulator 11. When the substrate 4 is moving, the initial product interacts with the leveling unit 13, the scraper 14 with its wedge 16 and the sides 15 shift the excess of the original product 12 into the receivers of the original product 17. On the smoothed surface of the original product 12 from the drum 3 is fed the upper layer of the substrate 4, which is rolled to the surface of the original about the product 12 by the roll 18, thereby removing air inclusions between the starting product 12 and the substrate 4. The resulting laminated sheet in the form of the starting product 12, enclosed between the substrates 4 during movement of the conveyor 6, enters the drying unit 7. The resulting sheet is dried by passing through the product electric current. Electric current from the power supply 25 is supplied to the electrodes 19 located on both sides of the tape, made in the form of an endless tape 20 interacting with the tension rollers 21 and pressure rollers 22, or in the form of metal plates 23, as shown in Fig. 13. When voltage is applied to the electrodes 19, volumetric drying of the initial product 12 takes place. The support plate 24 fixed under the conveyor 6 provides a constant clamping of the electrodes 19 to the surface of the sheet. Between the electrodes shown in Fig.13, a dielectric spacer 26 is installed, which ensures a constant gap between the electrodes.

Another option is drying by applying heat in the form of infrared radiation, as shown in Fig. 14, by means of infrared emitters 31 located above and below the moving product and electrically connected to the power supply 25.

Next, the dried composite sheet material in the form of an initial product 12, enclosed between the substrates 4, is fed into the molding unit 5, in which it is rolled between the backup roller 27 and the forming roller 28. In this case, protrusions and depressions are formed on the upper side of the tape. The final product - the finished product 29 is wound on the receiving device 8.

The device is simple in hardware design and operation and provides the ability to obtain a continuous flexible absorber sheet and the stability of technical characteristics along the length of the sheet.

Claims (7)

1. A device for the manufacture of acid gas absorbers, comprising a unit for the metered supply of the initial product, a substrate supply unit, a molding unit, a displacement unit, a drying unit and a receiving device, characterized in that the substrate supply unit is made in the form of two drums installed in series, wherein a dosed feed of the initial product is installed between the drums, after the second drum an additional roll is installed, the molding unit is made in the form of a support and forming rolls, there are no protrusions with a gap relative to each other, located along the generatrix of the roll, between the dosed feed unit of the initial product and the second drum there is an additional leveling unit made in the form of a wedge-shaped scraper installed above the displacement unit, the displacement unit contains a conveyor belt covering the support roll connected to the rotation drive molding unit. 2. A device for the manufacture of acid gas absorbers according to claim 1, characterized in that the device for the metered supply of the initial product is made in the form of a hopper with a movably installed valve. 3. A device for the manufacture of acid gas absorbers according to claim 1, characterized in that the leveling unit is provided with sides provided with receivers of the initial product. 4. A device for the manufacture of acid gas absorbers according to claim 1, characterized in that the drying unit is made in the form of electrodes connected to a power source. 5. A device for the manufacture of acid gas absorbers according to claim 1, characterized in that the drying unit is made in the form of infrared emitters installed above the displacement unit. 6. A device for the manufacture of acid gas absorbers according to claim 4, characterized in that the electrodes are made in the form of contact plates interconnected by a dielectric spacer. 7. A device for manufacturing acid gas absorbers according to claim 1, characterized in that the surface of the backup roll of the molding unit is made of an elastic material.

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