CN210253527U

CN210253527U - Scum removing device and anaerobic digestion tank

Info

Publication number: CN210253527U
Application number: CN201920966700.4U
Authority: CN
Inventors: 朱羽廷; 纪威; 吴兵兵; 顾成; 陈锡锋; 蒋正彦
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-04-07
Anticipated expiration: 2029-06-25

Abstract

The utility model relates to a dross remove device and anaerobic digestion jar. The dross remove device includes: the scraping arm is arranged in the reaction container; the rotary driving mechanism is connected with the scraping arm and is used for driving the scraping arm to rotate so as to scrape and gather scum on the surface of the reaction material liquid in the reaction container; the scum suction part is arranged in the reaction container and used for gathering and sucking scum scraped by the scraping arm; and the scum discharge part is connected with the outlet of the scum suction part and is used for discharging the scum collected and sucked by the scum suction part out of the reaction container. The device can be used for rapidly and continuously removing the scum, so that enough effective reaction volume is ensured in the reaction container, and the whole anaerobic digestion process can be continuously and stably carried out. After the floating slag collecting device is arranged at the top of the anaerobic digestion tank body, the floating slag can be effectively prevented from being accumulated in the anaerobic digestion tank, and the sufficient effective reaction volume in the anaerobic digestion tank is ensured.

Description

Scum removing device and anaerobic digestion tank

Technical Field

The utility model relates to a kitchen garbage utilization field especially relates to dross remove device and anaerobic digestion jar.

Background

Since the first resource utilization and harmless treatment test point of the kitchen waste in China in 2010 is developed, more than 200 kitchen waste treatment projects begin to explore all over the country. Through the development of the last 10 years, the anaerobic digestion process has become the mainstream process of kitchen waste treatment.

The anaerobic digestion process is a mature anaerobic biochemical treatment process and has a case of successful application in many industries. However, for kitchen waste treatment projects, a large amount of floatable impurities are mixed in the matrix, which causes great trouble to the normal operation of the anaerobic digestion process, because some projects are not completed in the front end sorting process, a large amount of scum enters the anaerobic digestion tank to be accumulated, the effective reaction volume is greatly reduced, and the fate of engineering production stop and tank cleaning improvement is faced. In practical cases operating in recent years, it is difficult to completely remove the scum in the anaerobic digester pretreatment process, and the accumulation of the scum in the tank is only a matter of time. Therefore, a set of anaerobic digestion tank system with scum removal function must be developed to effectively ensure the long-term stable operation of the anaerobic digestion process.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a scum removing apparatus and an anaerobic digestion tank, which are directed to the problems that scum is not easily removed and easily accumulates.

A dross removal apparatus, the dross removal apparatus comprising:

the scraping arm is arranged in the reaction container;

the rotary driving mechanism is connected with the scraping arm and is used for driving the scraping arm to rotate so as to scrape and gather scum on the surface of the reaction material liquid in the reaction container;

the scum suction part is arranged in the reaction container and used for gathering and sucking scum scraped by the scraping arm;

and the scum discharge part is connected with the outlet of the scum suction part and is used for discharging the scum collected and sucked by the scum suction part out of the reaction container.

During operation, the rotary driving mechanism drives the scraping arm to gather scum on the surface of reaction liquid in the reaction container; the scum suction part creates a hydraulic condition for gathering scum when in suction, so that the scum gathered by the scraping arm flows to the suction center along the scraping arm, and the scum gathered at the suction port of the scum suction part is directly sucked into the scum suction part, then is discharged to the outside of the reaction vessel through the scum discharge part and is subsequently treated outside.

The scum can be quickly and continuously removed in the reaction through the operation, the scum can be effectively prevented from being accumulated in the reaction container after being discharged out of the reaction container, the sufficient effective reaction volume in the reaction container is ensured, and the whole anaerobic digestion process can be continuously and stably carried out.

In one embodiment, the dross suction part is a pump box with a dross discharge pump therein, and the pump box is arranged in the inner center of the reaction vessel.

In one embodiment, the scum discharge part is a discharge pipe, one end of which is connected with the output port of the scum suction part, and the other end of which is communicated with the outside of the reaction container.

In one embodiment, the rotary driving mechanism is a motor arranged outside the reaction vessel, and the output end of the motor extends into the reaction vessel and is vertically connected with the scraping arm.

In one embodiment, the rotary driving mechanism is a motor arranged outside the reaction container, the scum pumping part is a pump box provided with a scum discharging pump inside, the scum discharging part is a hollow transmission shaft, the motor drives the hollow transmission shaft to rotate through the transmission mechanism, one end of the hollow transmission shaft is connected with an output port of the scum discharging pump, the other end of the hollow transmission shaft is communicated with the outside of the reaction container, and one end of the scraping arm is connected with the pump box.

In one embodiment, the transmission mechanism comprises

The driving gear is sleeved on an output shaft of the motor;

and the slewing bearing is sleeved on the hollow transmission shaft and comprises an inner ring and an outer gear ring which can rotate relatively, the outer gear ring is meshed with the driving gear, the outer gear ring is connected with the hollow transmission shaft, and the inner ring is fixed on the outer surface of the reaction container.

In one embodiment, one end of the scraping arm is connected with the rotary driving mechanism, and the other end of the scraping arm is provided with a supporting roller.

In one embodiment, the plurality of scraping arms are symmetrically arranged in the reaction container by taking the rotary driving mechanism as a center, and the end part of each scraping arm is connected with the rotary driving mechanism; the scraping arm has an arc.

In one embodiment, the reaction container further comprises a backflow port, and the backflow port is arranged on the surface of the reaction container, so that dehydrated scum can pass through and flow back into the reaction container.

The utility model also provides an anaerobic digestion jar, including foretell dross remove device, dross remove device installs anaerobic digestion jar is close to the position at jar body top.

After the scum removing device is arranged in the anaerobic digestion tank, the rotary driving mechanism can drive the scraping arm to gather scum on the surface of reaction liquid in the anaerobic digestion tank; when the scum suction part sucks, a hydraulic condition for gathering scum is created, the scum gathered by the scraping arm flows to the suction center along the scraping arm, and the scum gathered at the suction port of the scum suction part is directly sucked into the scum suction part and then is discharged to the outside of the anaerobic digestion tank through the scum discharge part, so that subsequent treatment is carried out on the outside.

The scum can be quickly and continuously removed in the reaction through the operation, the scum can be effectively prevented from being accumulated in the anaerobic digestion tank after being discharged out of the anaerobic digestion tank, the sufficient effective reaction volume in the anaerobic digestion tank is ensured, the tank does not need to be stopped for rectification, and the whole anaerobic digestion process can be continuously and stably carried out.

Drawings

Fig. 1 is a schematic structural diagram of a dross removal apparatus according to an embodiment of the present invention;

fig. 2 is a top view of the dross removal apparatus of fig. 1;

fig. 3 is a schematic view of a transmission mechanism in the dross removal apparatus shown in fig. 1.

In the figure, 100 parts of a reaction container, 210 parts of a scraping arm, 211 parts of a supporting roller, 220 parts of a rotary driving mechanism, 221 parts of a motor, 230 parts of a scum suction part, 231 parts of a pump box, 232 parts of a scum pump, 240 parts of a scum discharge part, 241 parts of a hollow transmission shaft, 251 parts of a speed reducer, 252 parts of a driving gear, 253 parts of an inner ring, 254 parts of an outer gear ring, 255 parts of a connecting plate, 256 parts of a ball bearing and 260 parts of a return port.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The following description is provided with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the invention as defined by the claims. It includes various specific details to assist in this understanding, but these details should be construed as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that changes and modifications may be made to the various embodiments described herein without departing from the scope of the present invention, which is defined by the following claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

It will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention as defined by the appended claims.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 shows a dross removal apparatus according to an embodiment of the present invention, the dross removal apparatus includes: a scraper arm 210 provided in the reaction vessel 100; a rotary driving mechanism 220 connected to the scraping arm 210 for driving the scraping arm 210 to rotate so as to scrape the scum on the surface of the reaction liquid in the reaction vessel 100; a dross pumping part 230 provided in the reaction vessel 100 for collecting and pumping dross; and a dross discharge part 240 connected to an outlet of the dross suction part 230, for discharging dross sucked by the dross suction part 230 out of the reaction vessel 100.

After the rotary driving mechanism 220 drives the scraping arm 210, the scraping arm 210 collects scum on the surface of the reaction liquid in the reaction vessel 100; the scum suction part 230 creates a hydraulic condition for gathering scum when it is sucked, so that the scum gathered by the scraping arm 210 flows toward the suction center along the scraping arm 210, and the scum gathered to the suction port of the scum suction part 230 is directly sucked into the scum suction part 230, and then discharged to the outside of the reaction vessel 100 through the scum discharge part 240, and is subjected to subsequent processes.

In some embodiments, the dross suction part 230 is a pump box 231 having a dross discharge pump 232 therein, and the pump box 231 is disposed at the inner center of the reaction vessel 100. After the scum discharge pump 232 is turned on, scum can be sucked into the scum discharge pump 232 through the suction port and then discharged outwards. In other embodiments, the scum suction unit 230 may be a centrifugal pump, and the scum suction unit 230 may be disposed on the inner wall of the reaction vessel 100, or may be disposed on the surface of the reaction solution without being fixedly connected to the reaction vessel 100.

In some embodiments, the inlet of the pump box 231 is provided with an overflow inlet weir. Scum can enter the pump box 231 along the overflow inlet weir, so that the scum can conveniently enter the pump box 231, and the pumping speed is also increased.

In some embodiments, the dross discharge part 240 is a discharge pipe having one end connected to the output port of the dross suction part 230 and the other end communicating with the outside of the reaction vessel 100. The dross sucked by the dross suction part 230 can be rapidly discharged to the outside of the reaction vessel 100 through the discharge pipe, and then can be externally processed. In other embodiments, the dross discharge part 240 may be a dross discharge opening formed in the reaction container 100.

In some embodiments, the rotary driving mechanism 220 is a motor disposed outside the reaction vessel 100, and an output end of the motor extends into the reaction vessel 100 and is vertically connected to the scraping arm 210. The motor can directly drive the scraping arm 210 to rotate so as to scrape the scum on the surface of the reaction feed liquid.

In some embodiments, the rotary driving mechanism 220 is a motor 221 disposed outside the reaction vessel 100, the scum suction part 230 is a pump box 231 having a scum discharge pump 232 disposed therein, the scum discharge part 240 is a hollow transmission shaft 241, the motor 221 drives the hollow transmission shaft 241 to rotate through a transmission mechanism, one end of the hollow transmission shaft 241 is connected to an output port of the scum discharge pump 232, the other end of the hollow transmission shaft is connected to the outside of the reaction vessel 100, and one end of the scraping arm 210 is connected to the pump box 231.

The motor 221 and the slag discharging pump 232 are started, the motor 221 drives the hollow transmission shaft 241 to rotate through the transmission mechanism after being started, the other end of the hollow transmission shaft 241 is connected with an output port of the slag discharging pump 232, the slag discharging pump 232 is arranged in the pump box 231, the pump box 231 is connected with one end of the scraping arm 210, the hollow transmission shaft 241 can drive the pump box 231 and the scraping arm 210 to synchronously rotate, and scum on the surface of reaction liquid in the anaerobic digestion tank reactor can be scraped and gathered when the scraping arm 210 rotates; the scum collected by the scraping arm 210 flows along the scraping arm 210 to the scum pump 232, and the scum collected near the suction port of the scum pump 232 is sucked into the pump box 231, discharged to the outside of the reaction vessel 100 through the hollow transmission shaft 241 by the scum pump 232, and subjected to subsequent treatment. After the arrangement structure is adopted, the hollow transmission shaft 241, the slag discharging pump 232, the pump box 231 and the scraping arm 210 are connected into a whole, integral rotary motion can be performed under the driving of the motor 221, and the operation stability is better.

In some embodiments, the transmission mechanism includes a driving gear 252 disposed on the output shaft of the motor 221; the slewing bearing is sleeved on the hollow transmission shaft 241 and comprises an inner ring 253 and an outer gear ring 254 which can rotate relatively, and a ball bearing 256 can be arranged between the inner ring 253 and the outer gear ring 254 to reduce the friction resistance generated when the inner ring 253 and the outer gear ring 254 rotate relatively so that the relative rotation between the inner ring 253 and the outer gear ring 254 is smoother; the outer gear ring 254 is engaged with the driving gear 252, the outer gear ring 254 is connected with the hollow transmission shaft 241, and the inner ring 253 is fixed on the outer surface of the reaction vessel 100. When the output shaft of the motor 221 rotates, the driving gear 252 is synchronously driven to rotate, the driving gear 252 synchronously drives the outer gear ring 254 and the hollow transmission shaft 241 to rotate through meshing with the outer gear ring 254, the hollow transmission shaft 241 drives the pump box 231 connected with the hollow transmission shaft 241 and the scraping arm 210 to synchronously rotate, the scraping arm 210 rotates to scrape and gather scum on the surface of reaction liquid in the anaerobic digestion tank reactor, and the scum is sucked and gathered by the scum discharge pump 232 and then discharged to the outside of the reaction container 100 through the hollow transmission shaft 241. The transmission mechanism can stably transmit the rotation power of the motor 221 to the hollow transmission shaft 241, and ensure that the hollow transmission shaft always rotates in a stable state. In some embodiments, a speed reducer 251 is further included, an input of the speed reducer 251 is coupled to an output shaft of the motor 221, and the drive gear 252 is mounted at an output of the speed reducer 251. The speed reducer 251 is arranged between the motor 221 and the driving gear 252 to reduce the rotation speed of the driving gear 252, so as to avoid the influence of the too high rotation speed on the scum scraping effect of the scraping arm 210. Of course, in other embodiments, the speed reducer 251 may not be included, and the implementation of the present invention is not affected.

In some embodiments, the outer gear ring 254 and the hollow drive shaft 241 are secured together by a coupling plate 255. The connecting plate 255 ensures that the connection between the outer gear ring 254 and the hollow transmission shaft 241 is stable, and the outer gear ring 254 can synchronously drive the hollow transmission shaft 241 to rotate in real time when rotating.

In some embodiments, the scraping arm 210 is connected to the rotary driving mechanism 220 at one end and is provided with a supporting roller 211 at the other end. When the scraping arm 210 rotates, the end part which is not connected with the rotary driving mechanism 220 may contact the inner wall of the reaction vessel 100 to generate friction, the support roller 211 can change the friction form from sliding friction to rolling friction, and then the friction and the abrasion between the end part of the scraping arm 210 and the inner wall of the reaction vessel 100 are reduced, and the service life of the scraping arm 210 is prolonged; the support roller 211 also serves as a support for supporting the rotation of the scraping arm 210 as a fulcrum on the inner wall of the reaction vessel 100.

In some embodiments, the plurality of scraping arms 210 are symmetrically disposed in the reaction container 100 around the rotary driving mechanism 220, and the end of each scraping arm 210 is connected to the rotary driving mechanism 220. The plurality of scraping arms 210 can increase the speed of scraping and gathering scum, and can cover the reaction liquid completely, and can scrape the scum clean at one time.

In some embodiments, the wiper arm 210 has an arc. The curved end of the scraping arm 210 that is away from the rotary driving mechanism 220 is rotated at a linear velocity that is greater than a linear velocity near an end of the rotary driving mechanism 220, and thus the scraping arm 210 scrapes the dross to gather the dross toward the dross suction unit 230, and thus the dross is not completely gathered by the dross suction unit 230. Specifically, the scraped dross may move centripetally along the scraping arm 210 having a curvature and flow to the pump housing 231. The wiper arm 210 having a curvature facilitates the movement of the dross along the wiper arm 210 toward the suction opening of the dross suction part 230, thereby enhancing the effect of the central accumulation of the dross and increasing the removal and discharge speed of the dross.

In some embodiments, a backflow port 260 is further included, and the backflow port 260 is provided on the surface of the reaction vessel 100. Discharged scum is dehydrated, and the liquid phase directly flows back to the reaction vessel 100 through the backflow port 260, so that the stability of the liquid level in the reaction vessel 100 is ensured, the scum can not be scraped by the scraping arm 210 due to the reduction of the liquid level height, and the continuity of scum removal operation is ensured.

In some embodiments provided, the anaerobic digester includes a dross removal apparatus as described above, mounted on top of the anaerobic digester.

Alternatively, the anaerobic digestion tank may be a steel tank or a concrete tank. The anaerobic digestion tank made of the steel tank or the concrete tank is corrosion-resistant and has longer service life.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A dross removal apparatus, comprising:

the scraping arm is arranged in the reaction container;

2. The dross removing apparatus of claim 1, wherein the dross drawing member is a pump housing having a dross extracting pump therein, the pump housing being provided at an inner center of the reaction vessel.

3. The dross removing apparatus according to claim 1 or 2, wherein the dross discharging member is a discharge pipe having one end connected to the output port of the dross suction member and the other end communicating with the outside of the reaction vessel.

4. The dross removal apparatus of claim 1 or 2, wherein the rotary drive mechanism is a motor disposed outside the reaction vessel, and an output end of the motor extends into the reaction vessel and is vertically connected to the scraping arm.

5. The dross removing apparatus of claim 1, wherein the rotary driving mechanism is a motor disposed outside the reaction vessel, the dross pumping unit is a pump box having a dross discharge pump therein, the dross discharging unit is a hollow transmission shaft, the motor drives the hollow transmission shaft to rotate through a transmission mechanism, one end of the hollow transmission shaft is connected to an output port of the dross discharge pump, the other end of the hollow transmission shaft is connected to the outside of the reaction vessel, and one end of the scraping arm is connected to the pump box.

6. The dross removal apparatus of claim 5, wherein the transmission mechanism comprises a driving gear disposed on an output shaft of the motor;

7. The dross removal apparatus of claim 1 or 2, wherein the scraping arm is connected to the rotary drive mechanism at one end and is provided with a support roller at the other end.

8. The dross removal apparatus of claim 1 or 2, wherein the plurality of scraping arms are symmetrically disposed about the rotary driving mechanism in the reaction vessel, and an end of each scraping arm is connected to the rotary driving mechanism; the scraping arm has an arc.

9. The dross removal apparatus of claim 1 or 2, further comprising a return port, wherein the return port is disposed on a surface of the reaction vessel, for allowing dehydrated dross to pass through and return to the reaction vessel.

10. An anaerobic digester comprising a dross removal apparatus according to any one of claims 1 to 9, the dross removal apparatus being mounted in the anaerobic digester proximate the top of the tank.