CN215800657U - Unpowered paper pulp degassing device - Google Patents
Unpowered paper pulp degassing device Download PDFInfo
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- CN215800657U CN215800657U CN202121918809.4U CN202121918809U CN215800657U CN 215800657 U CN215800657 U CN 215800657U CN 202121918809 U CN202121918809 U CN 202121918809U CN 215800657 U CN215800657 U CN 215800657U
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Abstract
The utility model provides an unpowered paper pulp degassing device, which comprises a tank body, wherein the tank body is a conical tank, and an upper top plate wall and/or a lower bottom plate wall which are opposite up and down are obliquely arranged, so that a large end and a small end are formed on two sides of the tank body in the transverse direction; a raw material paper pulp inlet is arranged on the tank body plate wall at the small end, a paper pulp input pipe is connected to the raw material paper pulp inlet, an airless paper pulp outlet is arranged on the lower bottom plate wall close to the large end, and an airless paper pulp discharge pipe is connected to the airless paper pulp outlet; the upper part of the lateral plate wall at the large end is provided with a gas-containing pulp outlet which is connected with a gas-containing pulp discharge pipe. This gas removal equipment makes the raw materials paper pulp that contains gas get into jar body, just can separate gas and paper pulp wherein, need not consume any power again outside carrying power, but the degassing effect is fine, and more than 90% gas in the paper pulp can all be got rid of, provides the stable paper pulp stream that flows to the paper machine of connecting, can make the degree of consistency of the paper of making show and improve to the quality of paper has been promoted by a wide margin.
Description
Technical Field
The utility model relates to the technical field of papermaking, in particular to a paper pulp degassing technology, and provides an unpowered paper pulp degassing device.
Background
In the papermaking process, gas is generated in the pulp during the flow of the pulp to the paper machine, and the gas sources are mainly two: one is that air enters the paper pulp in the process of entering the paper machine, and small bubbles are formed in the paper pulp; the other is that the fiber in the pulp contains gas. If these gases cannot be removed before the pulp enters the paper machine, the resulting bubbles can affect the uniformity of the paper produced and the properties and quality of the paper.
In order to remove the gas from the pulp, in the prior art, the pulp is sprayed to the top of the deaerator through a nozzle rotating at a high speed, so that the pulp is dispersed into a plurality of small droplets and forms a film moving along the cylindrical surface of the deaerator, the slurry is boiled by the vacuum degree in the deaerator, the free gas and the bubbles in the slurry are expanded under low pressure and broken in the collision, the residual and combined air is effectively separated, and the air in the slurry is removed through three physical actions of spraying, collision, boiling and the like. In this deaerator, a large power is required to rotate the pulp through the nozzles, and the power is consumed to blow the pulp to the top of the deaerator. Thus, the deaerator consumes a large amount of energy in deaeration. In the prior art, the pulp is rotated by means of centrifugal pumps and the degassing is carried out by means of the difference in mass between the pulp and the gas in the centrifugal field.
In conclusion, in the prior art, the pulp degassing consumes a great deal of power for pulp besides normal conveying, and the degassing cannot be completed by the conveying power of the pulp alone.
SUMMERY OF THE UTILITY MODEL
The utility model aims to improve the problems in the prior art and provides an unpowered pulp degassing device which can remove gas in the pulp during the pulp conveying process without adding extra power, thereby achieving the aim of saving energy.
The purpose of the utility model is realized as follows:
an unpowered paper pulp degassing device comprises a tank body, wherein the tank body is a conical tank, and an upper top plate wall and/or a lower bottom plate wall which are opposite up and down of the conical tank are obliquely arranged, so that a large end and a small end are formed on two sides of the tank body in the transverse direction; on one side of the large end, the distance between the upper top plate wall and the lower bottom plate wall is larger;
a raw material pulp inlet is arranged on the tank body plate wall at the small end, a pulp input pipe is connected to the raw material pulp inlet, an airless pulp outlet is arranged on the lower bottom plate wall close to the large end, and an airless pulp discharge pipe is connected to the airless pulp outlet; and a gas-containing pulp outlet is arranged at the upper part of the lateral plate wall of the large end, and is connected with a gas-containing pulp discharge pipe.
In use, the raw stock pulp enters the tank from a small end through a pulp inlet pipe connected to the raw stock inlet, and the airless pulp discharge pipe is connectable to a paper machine.
In use, the gas-containing raw material pulp is conveyed from the raw material pulp inlet to the small end of the conical tank by the power of the conveying pump arranged on the pulp input pipe, then the pulp can gradually flow to the large end, and the gas in the pulp continuously rises under the action of gravity and is gathered to the upper part of the large end of the tank body, and the pulp at the bottom of the tank body is basically free of gas. Thus, the airless pulp can be discharged from the bottom of the tank near the large end and fed directly to the paper machine, and the gas-containing pulp outlet provided at the upper portion of the large end side wall is opened, and the pulp in which gas is collected flows out through the gas-containing pulp outlet. This portion of the pulp may be fed to a pulp chest.
Furthermore, a backflow paper pulp inlet is further arranged on the wall of the tank body plate at the small end, one end of a backflow pipeline is connected to the backflow paper pulp inlet, and the other end of the backflow pipeline is connected to a gas-containing paper pulp discharge pipe on the gas-containing paper pulp outlet.
In use, the gas-containing pulp discharged from the gas-containing pulp outlet may be re-introduced into the tank via the return line via the return pulp inlet, re-flowed in the conical tank, and re-separated.
Preferably, the return pulp inlet is provided in an upper ceiling wall of the small end.
Preferably, the raw material pulp inlet is provided on a lateral panel wall of the small end.
Valves are arranged on the pulp input pipe, the airless pulp discharge pipe and the air-containing pulp discharge pipe;
a reflux pump is arranged on the reflux pipeline.
In a specific embodiment, the return conduit is connected to a return pulp inlet provided in the upper top wall of the small end, and the pulp inlet conduit is connected to the raw pulp inlet provided in the lateral side wall of the small end.
Preferably, the can is a polygonal prism-shaped can with two closed ends, and the can is horizontally disposed with its axis. The length of the cylinder in the horizontal direction may be determined according to the design of the pulp throughput.
Preferably, the apertures of the raw pulp inlet and the return pulp inlet are both larger than the gas-containing pulp outlet.
Preferably, the airless pulp outlet is lower than the raw pulp inlet and the return pulp inlet.
Preferably, the bore size of the return pulp inlet is greater than or equal to the airless pulp outlet.
Preferably, the diameter of the airless pulp outlet is 10% smaller than the diameter of the pulp inlet.
Preferably, the raw pulp inlet has a smaller caliber than the return pulp inlet.
Preferably, the apertures of the raw material pulp inlet on the gas-containing pulp outlet of the large end and the small end side wall are smaller than the aperture of the return pulp inlet on the upper top wall of the small end.
Preferably, the lateral panel wall at said large end of said tank body is formed of at least two oppositely inclined panel walls forming a convex lateral panel wall, said gas-containing pulp outlet being provided at or near the seam of intersection of the two inclined panel walls.
Preferably, the vertical distance between the gas-containing pulp outlet and the lowest part of the tank is 4 meters.
The unpowered paper pulp degassing device provided by the utility model has the advantages that the raw material paper pulp with certain flow velocity enters the tank body through the tank body, the gas in the raw material paper pulp can be separated from the paper pulp, the equipment is very simple, the operation is very convenient, and the key is that no power is consumed except for conveying power like the prior art, but the degassing effect of the degassing device is very good, more than 90% of gas in the paper pulp can be removed, the tank body of the degassing device can provide stable flowing paper pulp flow for a connected paper machine, so that the uniformity of the manufactured paper can be obviously improved, the quality of the paper is greatly improved, the efficiency of paper making production is improved, energy is saved, and the production cost is reduced.
The utility model is explained in detail below with reference to the figures and examples.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of the unpowered pulp degasser provided by the present invention.
Detailed Description
Fig. 1 shows an embodiment of the unpowered pulp degassing device provided by the utility model, which comprises a tank body 1, wherein the tank body 1 is a conical tank and is provided with a cylinder body with a conical section (see fig. 1), and the two ends of the cylinder body are closed. The upper top plate wall 101 and the lower bottom plate wall 102 of the conical tank body 1 are opposite inclined plate walls which are opposite up and down, so that a large end and a small end are formed on two sides of the tank body in the transverse direction; on the large end side, the interval between the upper ceiling wall 101 and the lower floor wall 102 is large.
A pulp inlet, namely a return pulp inlet 2 and a raw material pulp inlet 6, is respectively arranged on the upper top plate wall 101 and the side vertical side plate wall 103 of the small end. One end of the pipe 3 is connected to the return pulp inlet 2, and the pipe 8 is connected to the raw pulp inlet 6. The pipeline 8 is connected with a raw material paper pulp input pipe, and a valve 8-1 is arranged on the pipeline 8.
The lateral panel wall at the large end consists of two oppositely inclined side panel walls, a side upper panel wall 104 and a side lower panel wall 105. A gas-containing pulp outlet 7 is arranged at the joint of the two side walls, one end of a pipeline 3 is connected with the joint, the other end of the pipeline 3 is connected with a return pulp inlet 2 arranged on the upper top wall 101 at the small end, and the pipeline 3 is used as a return pipeline for returning the discharged material from the gas-containing pulp outlet 7 to the tank body 1 through the pulp inlet 2.
The height of the gas-containing pulp outlet 7 is higher than the raw pulp inlet 6 and the return pulp inlet 2. A valve 3-2 is arranged on the pipeline 3. A pump 3-1 may be arranged in the return conduit 3 to force the gaseous pulp to flow back.
An airless pulp outlet 4 is provided in the lower floor wall 102 near said large end, which is located substantially at the lowest part of the tank 1. The airless pulp outlet 4 is connected with an airless pulp discharge pipe 5, and the airless pulp discharge pipe 5 is provided with a valve 5-1.
In this example, the bore diameter of the return pulp inlet 2 is 4 meters, the bore diameter of the airless pulp outlet 4 is also 4 meters, the bore diameter of the raw pulp inlet 6 on the small end side wall of the tank 1 is 2 meters, and the bore diameter of the air-containing pulp outlet 7 on the large end side wall is 1 meter.
In use, raw material paper pulp enters the tank body 1 from the raw material paper pulp inlet 6, the valve 3-2 on the connecting pipeline 3 of the paper pulp inlet 2 and the valve 5-1 on the connecting pipeline 5 of the airless paper pulp outlet 4 are both closed at the beginning, the raw material paper pulp enters the tank body 1 according to a certain flow rate, and the paper pulp can be accumulated and circulated in the conical tank body. Because the gas is light in weight, essentially all bubbles of the gas formed are floating in the pulp in the upper middle portion of the cone. When the liquid level of the paper pulp entering the tank body 1 reaches or slightly exceeds the gas-containing paper pulp outlet 7, the valve 3-2 and the valve 5-1 can be opened successively or simultaneously while the raw material paper pulp continues to enter, then the pump 3-1 is started, and the gas-free paper pulp with gas removed flows out from the gas-free paper pulp outlet 4 and can be directly used for papermaking on a papermaking machine; the gas-containing pulp mixed with the floating bubbles is discharged out of the tank body 1 from a gas-containing pulp outlet 7, and then returns to the tank body 1 from a return pulp inlet 2 through a pipeline 3 serving as a return pipeline to perform degassing again.
In the above example the return pulp inlet 2 and the airless pulp outlet 4 are of equal diameter, or the airless pulp outlet 4 is slightly smaller than the return pulp inlet 2, for example 10% smaller.
The caliber of the raw material paper pulp inlet 6 is made smaller than that of the airless paper pulp outlet, so that the paper pulp can enter the tank body at a set speed under a certain paper pulp conveying amount, and the paper pulp can be circulated after entering the tank body. In this embodiment, the raw pulp inlet 6 has a bore half of the bore of the airless pulp outlet.
In this embodiment, the length of the conical can 1 is determined according to the amount of pulp to be treated, for example, the length of the can body is 12 meters. The height of the big-end closing up is 4 meters, namely the vertical distance from the bottom of the tank to the paper pulp outlet 7 is 4 meters.
The diameter of the backflow paper pulp inlet 2 close to the top of the small end is determined according to the amount of the treated paper pulp, the backflow paper pulp inlet 2 is connected with the backflow pipeline 3, and the backflow paper pulp enters the backflow paper pulp inlet 2 with a larger caliber from the smaller caliber of the gas-containing paper pulp outlet 7 through the backflow pipeline 3, so that the bubbling in the paper pulp can be broken, and the gas-liquid separation is facilitated; the diameter of the airless paper pulp outlet 4 at the bottom of the conical tank 1 near the big end is determined according to the amount of the treated paper pulp, and can be smaller than or equal to the diameter of the backflow paper pulp inlet 2, and is connected with a paper pulp outlet pipeline 5, and the paper pulp discharged from the paper pulp outlet pipeline 5 is airless paper pulp; the diameters of the raw material paper pulp inlet 6 and the gas paper pulp outlet 7 at the two ends of the conical tank are smaller than the diameter of the backflow paper pulp inlet 2, when paper pulp degassing is processed, the conical tank is horizontally placed, paper pulp flows from the small end to the large end of the tank body 1 and flows in the tank body, the gas-free paper pulp sinks, and the gas-containing paper pulp floats. The gas-free pulp is discharged from a gas-free pulp outlet 4 at the bottom of the tank body, the gas-containing pulp is stored at the upper part of the tank body close to the large end, is discharged from a gas-containing pulp outlet 7, enters the tank body 1 again from the return pipeline 3, and continues to circularly separate gas and liquid.
The gas-containing pulp discharged from the gas-containing pulp outlet 7 may also be introduced into the pulp chest of the exhaust gas to be treated.
When paper pulp enters the conical tank according to a certain flow velocity, the valve 3-2 and the valve on the gas-free paper pulp outlet are in a closed state firstly, the paper pulp can be accumulated and circulated in the conical tank, basically, gas-formed large and small bubbles float in the paper pulp at the middle upper part in the conical tank, after the paper pulp is circulated for a certain time, the two valves are opened, the paper pulp containing gas at the middle upper part in the conical tank enters the tank body again from the backflow paper pulp inlet 2 through the backflow pipeline 3, the circulation is continued, the paper pulp without gas can be accumulated at the bottom of the large head end of the conical tank 1 and is discharged from the paper pulp outlet pipeline 5, and the paper pulp can be directly used for papermaking on a papermaking machine.
The utility model can obtain the gas-free paper pulp with gas basically removed by the gravity separation of the gas-containing raw material paper pulp entering the tank body of the degassing device. The power used in the degassing process is only the power for conveying the pulp, and no extra power is consumed for separating the gas in the pulp.
The gas-containing pulp discharged from the tank through the gas-containing pulp outlet may be discharged to a pulp chest to be treated, left to stand, and then introduced into the tank. It can also be reprocessed by returning it to the tank via a return conduit arranged between the outlet for the gassy pulp and the pulp inlet in the upper ceiling wall.
Claims (7)
1. An unpowered pulp degassing device is characterized in that: the tank body is a conical tank, and the upper top plate wall and/or the lower bottom plate wall of the conical tank which are opposite up and down are obliquely arranged, so that a large end and a small end are formed on two sides of the tank body in the transverse direction; on the large end side, the distance between the upper top plate wall and the lower bottom plate wall is larger than the distance between the upper top plate wall and the lower bottom plate wall on the small end side;
a raw material pulp inlet is arranged on the tank body plate wall at the small end, a pulp input pipe is connected to the raw material pulp inlet, an airless pulp outlet is arranged on the lower bottom plate wall close to the large end, and an airless pulp discharge pipe is connected to the airless pulp outlet; and a gas-containing pulp outlet is arranged at the upper part of the lateral plate wall of the large end, and is connected with a gas-containing pulp discharge pipe.
2. The unpowered pulp degasser of claim 1, wherein:
the wall of the tank body plate at the small end is also provided with a backflow paper pulp inlet, one end of a backflow pipeline is connected to the backflow paper pulp inlet, and the other end of the backflow pipeline is connected to a gas-containing paper pulp discharge pipe on the gas-containing paper pulp outlet; and/or the presence of a gas in the gas,
arranging valves on the pulp inlet pipe and/or the airless pulp discharge pipe and/or the gas-containing pulp discharge pipe; and/or the presence of a gas in the gas,
the lateral plate wall of the large end of the tank body at least consists of two opposite inclined plate walls to form a convex lateral plate wall, and the gas-containing paper pulp outlet is arranged on or near the intersection seam of the two inclined plate walls.
3. The unpowered pulp degasser of claim 2, wherein: the upper top plate wall of the small end is provided with the backflow pulp inlet; and/or the presence of a gas in the gas,
a raw material pulp inlet is arranged on the lateral plate wall of the small end; and/or the presence of a gas in the gas,
and a reflux pump is arranged on the reflux pipeline.
4. The unpowered pulp degasser of claim 1, wherein: the tank body is a polygon prism-shaped cylinder body, two ends of the cylinder body are closed, and the tank body is horizontally arranged along the axis of the tank body.
5. The unpowered pulp degasser of claim 1, wherein: the caliber of the raw material paper pulp inlet is larger than that of the gas-containing paper pulp outlet; and/or the presence of a gas in the gas,
the airless pulp outlet is lower than the raw pulp inlet; and/or the presence of a gas in the gas,
the vertical distance between the gas-containing pulp outlet and the bottommost part of the tank body is 4 meters.
6. The unpowered pulp degasser of claim 2, wherein: the calibers of the raw material paper pulp inlet and the return flow paper pulp inlet are both larger than that of the gas-containing paper pulp outlet; and/or the presence of a gas in the gas,
the caliber of the backflow paper pulp inlet is smaller than or equal to that of the airless paper pulp outlet; and/or the presence of a gas in the gas,
the caliber of the raw material paper pulp inlet is smaller than that of the backflow paper pulp inlet.
7. The unpowered pulp degasser of claim 6, wherein: the caliber of the backflow paper pulp inlet is 10% smaller than that of the airless paper pulp outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121918809.4U CN215800657U (en) | 2021-08-11 | 2021-08-11 | Unpowered paper pulp degassing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121918809.4U CN215800657U (en) | 2021-08-11 | 2021-08-11 | Unpowered paper pulp degassing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215800657U true CN215800657U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121918809.4U Active CN215800657U (en) | 2021-08-11 | 2021-08-11 | Unpowered paper pulp degassing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215800657U (en) |
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2021
- 2021-08-11 CN CN202121918809.4U patent/CN215800657U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An unpowered pulp degassing device Effective date of registration: 20220916 Granted publication date: 20220211 Pledgee: TANGSHAN BANK Co.,Ltd. Pledgor: QIAN'AN HENGMAO PAPER Co.,Ltd. Registration number: Y2022990000628 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230822 Granted publication date: 20220211 Pledgee: TANGSHAN BANK Co.,Ltd. Pledgor: QIAN'AN HENGMAO PAPER Co.,Ltd. Registration number: Y2022990000628 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |