CN218146310U

CN218146310U - Sludge drying system

Info

Publication number: CN218146310U
Application number: CN202222047150.0U
Authority: CN
Inventors: 李展洪; 王广学
Original assignee: Jiangmen Huajie Solid Waste Treatment Co ltd
Current assignee: Jiangmen Huajie Solid Waste Treatment Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-12-27
Anticipated expiration: 2032-08-04

Abstract

The utility model discloses a sludge drying system, include: the sludge storage hopper is used for storing wet sludge, the dryer is connected with the sludge storage hopper through a screw conveyor, and the cyclone separator, the condenser and the gas incinerator are sequentially connected with an air outlet of the dryer; the hot water outlet of the condenser is connected with a cooling tower, a cold water inlet of the condenser is connected with a water outlet of the cooling tower, a dust collecting device is arranged at the bottom of the cyclone separator, a discharge port of the dust collecting device and a dry mud discharge port of the dryer are connected with a gathering screw conveyor, the gathering screw conveyor is connected with a guiding lifting screw conveyor, and the guiding lifting screw conveyor conveys dry mud and dust to an incinerator bin. The sludge drying system does not need to be dehydrated, directly enters a dryer from the discharge hopper to dry and discharge, has high production efficiency and large treatment capacity, harmlessly treats tail gas, and avoids environmental pollution.

Description

Sludge drying system

Technical Field

The utility model relates to a sludge drying technical field especially relates to a sludge drying system.

Background

With the vigorous development of the printing and dyeing industry, the treatment force on printing and dyeing wastewater is continuously increased, a wastewater treatment plant matched with a printing and dyeing enterprise generates a large amount of sludge every day after being put into operation, and after the printing and dyeing wastewater tends to be treated intensively, the amount of the sludge is increased day by day, and the components of the generated sludge are complicated day by day. The conventional treatment method for a large amount of sludge produced is to filter press the sludge to a water content of 80% or less by a mechanical filter press device, transport the sludge to the outside, and finally dispose the sludge in a landfill, stack, or dump. Such a disposal method often causes secondary pollution to the natural environment, and has relatively serious environmental safety hidden dangers.

In order to achieve the aims of harmless treatment, reduction and resource treatment of the printing and dyeing sludge, the sludge must be dried firstly, and the establishment of a safe and economic sludge drying process is the key point for thoroughly and effectively treating the sludge. At present, the mature sludge drying process applied at home and abroad is heating drying. The sludge heat drying needs to use a large amount of heat to heat the sludge, different sludge drying process routes and equipment are selected, and the drying operation cost and the investment construction cost are seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sludge drying system of production efficiency height, tail gas innocent treatment.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A sludge drying system, comprising: the sludge storage hopper is used for storing wet sludge, the dryer is connected with the sludge storage hopper through a screw conveyor, and the cyclone separator, the condenser and the gas incinerator are sequentially connected with an air outlet of the dryer; the hot water outlet of the condenser is connected with a cooling tower, a cold water inlet of the condenser is connected with a water outlet of the cooling tower, a dust collecting device is arranged at the bottom of the cyclone separator, a discharge port of the dust collecting device and a dry mud discharge port of the dryer are connected with a gathering screw conveyor, the gathering screw conveyor is connected with a guiding lifting screw conveyor, and the guiding lifting screw conveyor conveys dry mud and dust to an incinerator bin.

As a further explanation of the above scheme, the drying machine includes a housing, four rotating shafts arranged in parallel in the housing, wedge-shaped sector blades arranged on the rotating shafts, and a driving mechanism for driving the rotating shafts to rotate.

As a further explanation of the above scheme, the shell is a jacketed shell, and comprises an outer shell and an inner shell which are arranged at intervals, and a heat insulation layer is arranged between the outer shell and the inner shell.

As a further explanation of the above scheme, the number of the dryers is two, and the two dryers are operated in parallel.

As a further explanation of the above scheme, the sludge storage hopper is arranged in the pit, a movable cover is arranged on the sludge storage hopper, the movable cover is driven by a hydraulic cylinder, and a plurality of gravity sensors for sensing the arrival of the transport vehicle are arranged on the ground at the periphery of the pit.

As a further explanation of the above scheme, a fixed cover is further provided on the sludge storage hopper, and a miniature induced draft fan is provided on the fixed cover.

As a further explanation of the above scheme, a vibration motor is provided on the sludge storage hopper.

As a further illustration of the above scheme, the condenser is a finned tube condenser; and a high-pressure cleaning device is arranged in the condenser.

As a further explanation of the scheme, the gas incinerator is connected with an induced draft fan and an exhaust pipeline to discharge combusted gas, and the exhaust pipeline is provided with a sampling hole.

As a further explanation of the above scheme, the dryer is connected with a waste heat boiler, and the waste heat boiler provides steam for drying for the dryer; and the water replenishing tank of the waste heat boiler is connected with a condensed water outlet in the dryer through a pipeline.

The beneficial effects of the utility model are that.

1. The sludge drying system does not need to be dehydrated, directly gets into the dry ejection of compact in the desiccator from a hopper, and production efficiency is high, and the handling capacity is big, and the tail gas that the desiccator produced gets into gas incinerator and burns after removing dust and condensing, and tail gas innocent treatment avoids the polluted environment.

2. The wet sludge storage hopper is positioned in a pit, the hopper body is provided with a movable cover, a plurality of gravity sensors for sensing arrival of a sludge transporting vehicle are arranged on the peripheral ground of the pit, when the sludge transporting vehicle arrives at a site, the gravity sensors sense the vehicle and transmit signals to the control device, the control device drives the cover opening mechanism to operate, the movable cover is opened, and the mud transporting vehicle dumps and unloads after entering a fixed position, so that sludge is conveniently stored in the wet sludge storage hopper; the vibration motor is adopted to play a role of breaking a bridge, so that the idle running of the discharge screw conveyor is prevented; a miniature induced draft fan is arranged to maintain the negative pressure in the hopper, so as to prevent the odor from overflowing.

3. The dryer adopts a two-line parallel operation system, the treatment capacity is improved, and the condenser is provided with an automatic high-pressure cleaning device to avoid the blockage of the condenser.

Drawings

Fig. 1 is a schematic flow chart of a sludge drying system provided by the present invention.

Fig. 2 is a schematic structural view of a sludge drying system provided by the present invention.

Reference numerals indicate the same.

1: sludge storage hopper, 2: dryer, 3: cyclone separator, 4: condenser, 5: gas incinerator, 6: cooling tower, 7: provided is a waste heat boiler.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.

In the present invention, unless otherwise explicitly defined or limited, the terms "assembled", "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified and limited, "a first feature" on "or" under "a second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact through another feature therebetween. Also, the first feature "above," "below," and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply an elevation where the first feature is at a higher level than the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.

The following description will further describe embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages of the present invention will be more clear and definite. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but should not be construed as limiting the invention.

As shown in fig. 1 and 2, a sludge drying system includes: the sludge incinerator comprises a sludge storage hopper 1 for storing wet sludge, a dryer 2 connected with the sludge storage hopper 1 through a screw conveyor, a cyclone separator 3, a condenser 4 and a gas incinerator 5, wherein the cyclone separator 3, the condenser 4 and the gas incinerator 5 are sequentially connected with a gas outlet of the dryer 2; the hot water outlet of the condenser 4 is connected with a cooling tower 6, the cold water inlet of the condenser 4 is connected with the water outlet of the cooling tower 6, the bottom of the cyclone separator 3 is provided with a dust collecting device, the discharge port of the dust collecting device and the dry sludge discharge port of the dryer 2 are connected with a gathering screw conveyor, the gathering screw conveyor is connected with a guiding lifting screw conveyor, and the guiding lifting screw conveyor conveys the dry sludge and dust to an incinerator bin. In order to improve production efficiency, the utility model discloses plan to build daily treatment and be great sludge drying system, sludge burns after the mummification and handles, require sludge moisture content total control after the mummification to be less than or equal to 40% (wet basis) left and right sides, mud speed and the dwell time of mud in the desiccator are adjusted in the moisture content accessible control, sludge drying system need not through dehydration, directly get into the dry ejection of compact in the desiccator from a hopper, high production efficiency, the handling capacity is big, the tail gas that the desiccator produced gets into gas incinerator and burns after removing dust and the condensation, tail gas innocent treatment, avoid the polluted environment.

Specifically, all the sludge is transported to a sludge storage hopper 1 through an automobile for storage and buffering, and the sludge storage hopper is arranged in a pit. The sludge storage hopper 1 is provided with a fixed cover and a movable cover, and the movable cover is driven to be opened or closed by a hydraulic cylinder. On the peripheral ground of the pitThe device is provided with a plurality of gravity sensors for sensing the arrival of the sludge transporting vehicle, when the sludge transporting vehicle arrives at the site, the movable cover is automatically opened under the action of the gravity sensors, and the sludge transporting vehicle dumps and unloads after entering a fixed position. A miniature draught fan is arranged on the upper surface of the fixed cover to maintain the negative pressure of the mud bucket and prevent odor from overflowing. In this embodiment, the number of the sludge storage hoppers is two, and the volume is 60m ³ _。

And a discharging screw conveyor is arranged at the bottom of the sludge storage hopper 1 to continuously convey the sludge in the sludge storage hopper to the next equipment. The discharging screw conveyer adopts a shaftless screw conveyer and adopts variable frequency motor input to realize variable quantitative discharging. The sludge storage hopper adopts a rectangular cone structure, the included angle is smaller than the repose angle of the materials, and bridging is prevented in design. Two vibrating motors are arranged on the sludge storage hopper, so that a bridge breaking effect is achieved, and idling of the discharge screw conveyor is prevented. The vibration motor is operated accidentally, and is not set for long-term operation. The working condition of the vibration motor is set to be that when the working current of the discharging spiral conveyor is lower than a certain set value, the vibration motor automatically works, and the working time is 5S or freely set. When the working current of the discharging spiral conveyor is higher than a certain set value, the vibration motor automatically stops, can receive double commands to stop working, and can receive a single command to start working.

The dryer 2 is a bidirectional shearing wedge sector blade type sludge dryer. The wedge-shaped fan blade type fan blade comprises a shell, four rotating shafts horizontally arranged in the shell, a driving mechanism for driving the rotating shafts to rotate, and a plurality of wedge-shaped fan blade bodies arranged on the rotating shafts. The driving mechanism is of a motor and sprocket structure, and the rotating shaft is supported by a bearing supporting structure. The rotating shaft and the wedge-shaped sector blades are arranged in a hollow mode, the wedge-shaped sector blades are communicated with the rotating shaft, saturated water vapor or heat conduction oil enters the rotating shaft and the wedge-shaped sector blades through shaft ends, sludge is placed between the rotating shaft and the blades, the sludge is heated, and moisture in the sludge is quickly evaporated into water vapor and is pumped out. In order to improve the heat preservation effect of the dryer, the shell is a jacket type shell and comprises an outer shell and an inner shell which are arranged at intervals, and a heat preservation layer is arranged between the outer shell and the inner shell. In this embodiment, the heat preservation layer is rock wool layer.

In this embodiment, the dryer 2 is connected to a waste heat boiler 7, and the waste heat boiler 7 provides steam for drying for the dryer 2. And a water replenishing tank of the waste heat boiler 7 is connected with a condensed water outlet in the dryer through a pipeline. Steam and mud indirect contact avoid volatilizable gas in the mud to get into in the steam and pollute steam for the condensate water behind steam and the steam heat exchange can carry out recycle.

In this implementation, the desiccator adopts two line parallel operation system, and the dry sludge that the desiccator production line came out adopts a screw conveyer that gathers to discharge dry sludge, converges from the desiccator discharge gate and carries on the direction after concentrating, finally gathers screw conveyer discharge gate and apart from ground about 1.5 meters height, is adapted to and packs into the ton bag. The materials from the two dryers are conveyed to the dry sludge incinerator unit in a two-in-one mode.

Since the printing sludge and the paper sludge contain very fine dust, a cyclone is used for dust removal. The cyclone dust collector adopts a double-cyclone-head structure, the dust removal efficiency can reach about 95%, and the gas after dust removal enters the next procedure.

The gas from the cyclone 3 enters a finned tube condenser for condensation, and most condensable gas is condensed into condensed water in the process, and enters a sewage treatment device for retreatment through a sewage drainage pipeline and a delivery pump.

Because the waste gas entering the condenser 4 still contains a trace amount of dust, in order to prevent the condenser from being blocked due to the fine dust for a long time, an automatic high-pressure cleaning device is designed for the condenser, the fine dust 'mud' deposited on the condenser is cleaned at regular time, the high-pressure cleaning device adopts a plurality of spray head structures, and the automatic cleaning is carried out once every 2 hours and every 10 minutes.

The gases discharged from the condenser 4 are mostly non-condensable organic gases, although these haveThe amount of organic gas is not large, but the taste is very complicated, and therefore, the treatment is required in order not to cause secondary pollution to the environment. In order to prevent secondary pollution to the atmosphere, the waste gas discharged from the condenser is sent to a gas incinerator 5 to be incinerated. In the present embodiment, the design complies with three principles of temperature, time and vortex, and according to the exhaust gas flow rate of the present embodiment, a set of 4m is manufactured ³ The gas incinerator is designed by vortex, so that the retention time of gas is 5S, the incineration temperature is 500 ℃, and harmful components are completely incinerated into carbon dioxide and water vapor to be discharged. And finally, discharging through a draught fan and an exhaust pipeline. And a sampling hole is reserved on the exhaust pipeline.

The utility model provides a sludge drying system adopts PLC automatic control system control. The PLC automatic control system is purchased by those skilled in the art according to actual needs, and the specific structure and working principle thereof are not described herein again.

It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the known art are intended to fall within the scope of the invention, which is defined by the claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims

1. A sludge drying system is characterized by comprising: the sludge storage hopper is used for storing wet sludge, the dryer is connected with the sludge storage hopper through a screw conveyor, and the cyclone separator, the condenser and the gas incinerator are sequentially connected with an air outlet of the dryer; the hot water outlet of the condenser is connected with a cooling tower, a cold water inlet of the condenser is connected with a water outlet of the cooling tower, a dust collecting device is arranged at the bottom of the cyclone separator, a discharge port of the dust collecting device and a dry mud discharge port of the dryer are connected with a gathering screw conveyor, the gathering screw conveyor is connected with a guiding lifting screw conveyor, and the guiding lifting screw conveyor conveys dry mud and dust to an incinerator bin.

2. The sludge drying system of claim 1, wherein the dryer comprises a housing, four rotating shafts arranged in the housing in parallel, wedge-shaped sector blades arranged on each rotating shaft, and a driving mechanism for driving the rotating shafts to rotate.

3. The sludge drying system of claim 2, wherein the housing is a jacketed housing comprising an outer housing and an inner housing spaced apart from each other, and a thermal insulation layer is disposed between the outer housing and the inner housing.

4. The sludge drying system of claim 1, wherein the number of the dryers is two, and the two dryers are operated in parallel.

5. The sludge drying system of claim 1, wherein the sludge storage hopper is disposed in the pit, a movable cover is disposed on the sludge storage hopper, the movable cover is driven by a hydraulic cylinder to open and close, and a plurality of gravity sensors for sensing arrival of the transport vehicle are disposed on the ground around the pit.

6. The sludge drying system as claimed in claim 5, wherein a fixing cover is further provided on the sludge storage hopper, and a micro induced draft fan is provided on the fixing cover.

7. The sludge drying system of claim 5, wherein a vibration motor is disposed on the sludge storage hopper.

8. The sludge drying system of claim 1, wherein the condenser is a finned tube condenser; and a high-pressure cleaning device is arranged in the condenser.

9. The sludge drying system of claim 1, wherein the gas incinerator is connected with an induced draft fan and an exhaust pipe to discharge combusted gas, and the exhaust pipe is provided with a sampling hole.

10. The sludge drying system of claim 1, wherein the dryer is connected with a waste heat boiler, and the waste heat boiler provides drying steam for the dryer; and the water replenishing tank of the waste heat boiler is connected with a condensed water outlet in the dryer through a pipeline.