CN212418902U

CN212418902U - Wood chip washing and dehydrating device

Info

Publication number: CN212418902U
Application number: CN202020759510.8U
Authority: CN
Inventors: 李成
Original assignee: Luzhou Yongfeng Pulp And Paper Co Ltd
Current assignee: Luzhou Yongfeng Pulp And Paper Co Ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2021-01-29
Anticipated expiration: 2030-05-09

Abstract

The utility model provides a wood chip washing and dehydrating device, which comprises a washing machine and a spiral dehydrator which are respectively arranged on a frame, wherein the washing machine comprises two washing drums which are arranged in a box body in parallel, the top of the box body above one side of one washing drum is provided with a feed inlet, the lower part of the box body is connected with a cone hopper corresponding to each washing drum, and the lower end of the cone hopper is provided with a gate valve for discharging slag; one side end of the box body far away from the feed inlet is communicated with the spiral dewaterer through a pipeline downwards, the spiral dewaterer is inclined and upwards arranged and is provided with three spiral dewaterers side by side, the three spiral dewaterers share one discharge port, each spiral dewaterer is provided with a drain outlet, and the drain outlet is positioned below the discharge port in an inclined mode. After the wood chips are washed twice by the double-drum washing machine, the heavy impurity removal rate can reach more than 95%, the silt cleanliness can reach more than 80%, the washing efficiency is improved, and the device integrates the washing and dewatering functions into a whole, and is simple and reasonable in structure, stable and reliable in operation, high in efficiency, low in energy consumption and low in production cost.

Description

Wood chip washing and dehydrating device

Technical Field

The utility model relates to a pulp board manufacture equipment technical field, concretely relates to wood chip washing dewatering device.

Background

In the process of manufacturing the pulp board, the wood chip raw material must be washed by water to remove impurities such as silt, sand, ironware and the like in the wood chip raw material, then the moisture in the wood chips is removed, and the washed wood chips are conveyed into a defibrator through some conveying machinery for defibrator so as to prepare the wood fiber. The purpose of cleaning the wood chips is to reduce the loss of impurities to the grinding disc of the grinder and reduce the power consumption of the grinder, and to improve the quality of fibers and stabilize the moisture content of the fibers.

The existing wood chip washing processing modes are as follows: the wood chips are conveyed to a washing machine by a screw conveyor after passing through a screening device, the wood chips are washed by the washing machine and then pumped into a front bin, and water and the wood chips are pumped to a screw dehydrator for dehydration by a wood chip pump, namely the wood chips are conveyed together with the water by the wood chip pump after being washed. However, the processing mode only carries out single washing on the wood chips and then enters the spiral dehydrator for dehydration, and some wood chips are not washed in place, so that the washing efficiency is low; in addition, the device has complex structure, a plurality of devices are distributed, the power consumption is high, the maintenance cost of the devices is high, and the device is not economical for paper pulp production enterprises.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art, the utility model aims at providing a wood chip washing dewatering device, this wood chip washing dewatering device collect the equipment in an organic whole of many production links, simple structure, reasonable, the operation is stable, reliable, efficient, and energy resource consumption is low, low in production cost.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a wood chip washing and dehydrating device, which comprises a washing machine and a spiral dehydrator which are respectively arranged on a frame, wherein the washing machine comprises two washing drums which are arranged in a box body in parallel, a feed inlet is arranged at the top of the box body above one side of the washing drum, a cone hopper corresponding to each washing drum is connected below the box body, and the lower end of the cone hopper is provided with a gate valve for discharging slag; the box is kept away from one side end of feed inlet downwards through the pipeline with the screw dewaterer intercommunication, the screw dewaterer slope upwards sets up and is equipped with three side by side, and three screw dewaterers share a discharge gate, and every screw dewaterer is equipped with a drain, the drain is located the oblique below of discharge gate.

Furthermore, a plurality of uniformly distributed pressing plates are arranged on each washing drum along the radial direction of the washing drum, and the cross section of each pressing plate is trumpet-shaped.

Furthermore, a plurality of scraping plates used for preventing material clamping are respectively arranged at two ends of the washing drum, and the scraping plates and the pressing plates are arranged on the same bus and along the radial direction of the washing drum.

Furthermore, a semicircular water filtering screen is arranged at the bottom in the spiral dehydrator, and the screen holes of the water filtering screen are conical screen holes with small inside and large outside.

Further, the spiral inclination angle of the spiral dewatering machine is 30 degrees.

Further, the gate valve is a double-layer gate valve.

Furthermore, an observation window is arranged on a pipeline between the upper valve body and the lower valve body of the double-layer gate valve.

Further, the double-layer gate valve is a double-layer electric gate valve or a double-layer pneumatic gate valve.

Compared with the prior art, the utility model provides a wood chip washing dewatering device has following beneficial effect:

1. after the wood chips are washed twice by the double-drum washing machine, the removal rate of heavy impurities can reach more than 95%, the cleanliness of silt can reach more than 80%, and the washing efficiency is improved;

2. the scrapers arranged at the two ends of the washing drum can disturb the gap between the two end surfaces of the washing drum and the inner wall surfaces of the two corresponding sides of the box body when the washing drum rotates, so that the possibility of wood chips staying in the gap is reduced, material blockage is prevented, the maintenance frequency is reduced, the long-time operation of the device is ensured, and the washing efficiency of the wood chip raw material is further improved;

3. through the water filtering screen with the conical screen hole structure with the small inner part and the large outer part, when the spiral dehydrator dehydrates the cleaned wood chips, the crushed wood chips are not easy to block the screen holes, the continuous automatic production is facilitated, the efficiency is high, and the stability and the reliability of the device are ensured;

4. the spiral inclination angle (namely the included angle between the axis of the spiral dehydrator and the horizontal plane) of the spiral dehydrator is set to be 30 degrees, so that the dehydration efficiency of the wood chips can be effectively ensured, meanwhile, the occupied space is reduced, and the reasonable layout of the device is embodied.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic top view of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1-2, the present invention provides a wood chip washing and dewatering device, which comprises a washing machine 100 and a screw dewatering machine 200 respectively disposed on a frame (not shown in the figure), wherein the washing machine 100 comprises two washing drums 120 disposed in a box body 110 in parallel, a feed inlet 111 is disposed at the top of the box body 110 above one side of the washing drum 120, a conical hopper 130 corresponding to each washing drum 120 is connected below the box body 110, and a gate valve 300 for discharging slag is installed at the lower end of the conical hopper 130; one side end of the box body 110, which is far away from the feeding hole 111, is communicated with the spiral dewaterer 200 through a pipeline downwards, the spiral dewaterer 200 is obliquely and upwards arranged and is provided with three parallel screw dewaterers, the three screw dewaterers 200 share one discharging hole 210, each screw dewaterer 200 is provided with one sewage discharge port 220, and the sewage discharge ports 220 are positioned below the discharging hole 210 in an oblique mode.

When the washing machine works, wood chips to be washed enter the washing machine 100 from the feeding hole 111 at the top of the box body 110, are washed by the two washing drums 120 rotating in the same direction in sequence, impurities on the wood chips are deposited in the conical hopper 130, and then are discharged through the gate valve 300; the washed wood chips are driven by the washing drum 120 and water flow to enter the screw dehydrator 200 for dehydration, and then discharged from the discharge port 210, and the removed sewage is discharged out of the device through the sewage discharge port 220. After the wood chips are washed twice by the double-drum washing machine, the heavy impurity removal rate can reach more than 95%, the silt cleanliness can reach more than 80%, the washing efficiency is improved, and the device integrates the washing and dewatering functions into a whole, and is simple and reasonable in structure, stable and reliable in operation, high in efficiency, low in energy consumption and low in production cost.

As shown in FIG. 1, each of the washing drums 120 is provided with a plurality of pressing plates 121 uniformly distributed along the radial direction thereof, and the cross section of each of the pressing plates 121 is trumpet-shaped. When the washing drum 120 rotates, the pressing plate 121 can press the wood chip raw materials floating on the water surface into the water, so that impurities such as sand and stones are separated from the wood chip raw materials.

The two ends of the washing drum 120 are respectively provided with a plurality of scrapers 122 for preventing material from being stuck, and the scrapers 122 and the pressing plate 121 are arranged on the same generatrix and along the radial direction of the washing drum 120. When the washing drum 120 rotates, the scraper 122 can disturb the gap between the two end faces of the washing drum 120 and the inner wall faces of the two corresponding sides of the box body 110, so that the possibility of wood chips staying in the gap is reduced, material blockage is prevented, the maintenance frequency is reduced, the long-time operation of the device is further ensured, and the washing efficiency of the wood chip raw materials is further improved.

As shown in fig. 1, a semicircular water filtering screen 230 is provided at the bottom of each spiral dehydrator 200, and the screen holes of the water filtering screen 230 are conical screen holes with a small inside and a large outside. Through the water filtering screen with the structure, the crushed wood chips are not easy to block the screen holes when the wood chips are dewatered after being cleaned, the continuous automatic production is facilitated, the efficiency is high, and the stability and the reliability of the device are ensured.

In this embodiment, the spiral inclination angle (i.e. the included angle between the axis and the horizontal plane) of the spiral dewatering machine 200 is set to 30 °, so as to effectively ensure the dewatering efficiency of the wood chips, and reduce the occupied space, thereby showing the reasonable layout of the device.

The gate valve 300 is a double-layer gate valve; an observation window 310 is arranged on the pipeline between the upper valve body and the lower valve body of the double-layer gate valve, and the accumulation condition of impurities in the pipeline can be directly and clearly observed from the outer side through the observation window 310. When the impurities in the pipeline are accumulated to a considerable amount, the upper valve body of the double-layer gate valve is closed firstly to prevent the water and the wood chip raw materials in the box body 110 from continuously falling, and then the lower valve body of the double-layer gate valve is opened to directly discharge the impurities in the pipeline downwards; after the impurity is discharged, the lower valve body is closed firstly, and then the upper valve body is opened, so that the cleaning operation can be carried out, and the impurity can be settled in the pipeline. In this embodiment, the double-layer gate valve is preferably a double-layer electric gate valve or a double-layer pneumatic gate valve.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. The wood chip washing and dehydrating device is characterized by comprising a washing machine and a spiral dehydrator which are respectively arranged on a rack, wherein the washing machine comprises two washing drums which are arranged in a box body in parallel, a feed inlet is formed in the top of the box body above one side of one washing drum, a conical hopper corresponding to each washing drum is connected below the box body, and a gate valve for discharging slag is arranged at the lower end of each conical hopper; the box is kept away from one side end of feed inlet downwards through the pipeline with the screw dewaterer intercommunication, the screw dewaterer slope upwards sets up and is equipped with three side by side, and three screw dewaterers share a discharge gate, and every screw dewaterer is equipped with a drain, the drain is located the oblique below of discharge gate.

2. The wood chip washing and dewatering device according to claim 1, characterized in that each washing drum is provided with a plurality of pressing plates which are uniformly distributed along the radial direction of the washing drum, and the cross section of each pressing plate is trumpet-shaped.

3. The wood chip washing and dewatering device according to claim 2, wherein a plurality of scrapers for preventing material jamming are respectively arranged at two ends of the washing drum, and the scrapers and the pressing plate are arranged on the same generatrix and along the radial direction of the washing drum.

4. The wood chip washing and dewatering device according to claim 1, wherein a semi-circular water filtering screen is arranged at the bottom of each spiral dewatering machine, and the screen holes of the water filtering screen are conical screen holes with small inside and large outside.

5. The wood chip washing and dewatering device according to claim 1 or 4, characterized in that the screw inclination of the screw dewaterer is 30 °.

6. The wood chip washing dewatering device of claim 1, wherein the gate valve is a double layer gate valve.

7. The wood chip washing and dewatering device according to claim 6, wherein an observation window is installed on the pipe between the upper and lower valve bodies of the double-layer gate valve.

8. The wood chip washing and dewatering device according to claim 6 or 7, characterized in that the double-layer gate valve is a double-layer electric gate valve or a double-layer pneumatic gate valve.