CN208779962U

CN208779962U - A kind of limekiln waste heat from tail gas reuse means

Info

Publication number: CN208779962U
Application number: CN201821406993.2U
Authority: CN
Inventors: 冯学良; 邢振海
Original assignee: Hainan Jinhai Pulp and Paper Co Ltd
Current assignee: Hainan Jinhai Pulp and Paper Co Ltd
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2019-04-23
Anticipated expiration: 2028-08-30

Abstract

The utility model provides a kind of limekiln waste heat from tail gas reuse means, including limekiln chimney and storage mud tank, it further include air-introduced machine, drier, roots blower, screw conveyor and dust-extraction unit, storage has wet mud in the storage mud tank, the wet mud is transmitted in drier by screw conveyor, the limekiln chimney is connected by air-introduced machine with drier, the drier bottom is equipped with roots blower and blender, drier top is equipped with exhanst gas outlet, and the exhanst gas outlet is connected by pipeline with dust-extraction unit, smoke evacuation chimney.The dewatered sludge of this practical generation has preferable efficiency of combustion, while can also reduce the flue-gas temperature of limekiln discharge, does not increase the secondary investment of the energy, investment of the production process without other fuel and raw material, environmentally protective cleaning.

Description

A kind of limekiln waste heat from tail gas reuse means

Technical field

The utility model relates to boiler energy-saving technical field more particularly to a kind of limekiln waste heat from tail gas reuse means.

Background technique

A kind of carrier of the paper as civilization, with the continuous propulsion of process of industrialization, variation also occurs for manufacturing process, With the continuous development of China's paper-making industry, the yield of paper mill sludge also increasingly increases, and has statistics to show the every production of papermaking enterprise 1 ton of recycled writing paper, sludge yield will be at 85 kilograms or more, and the universal moisture content of sludge generated in papermaking enterprise production process 80% or more, it is meant that 1 ton of recycled writing paper of every production will generate the water-containing sludge close to 0.5 ton, and therefore, China's paper-making industry is wanted The sludge quantity of processing is very big.

The general pathogen all containing there are many, helminth, pathogenic microorganisms and the difficult organic poison decomposed in sludge, if It cannot rationally handle, huge harm will be caused to environment, with the enhancing that Environmental Protection in China is realized, a series of method law Rule are also put into effect in succession, and the processing mode and standard control to this pollutant of paper mill sludge are also increasingly stringenter, some tradition Processing mode gradually forbidden because processing requirement is not achieved, therefore explore high-efficiency environment friendly processing mode it is extremely urgent.

Currently, the main processing ways of China's paper mill sludge still with landfill based on, sanitary landfills is simple to operation, processing Cost is relatively low.But due to penetrating fluid, to underground water, there is the growing tension of potential threat and urban land, sludge in recent years The ratio shared by Treatment of Sludge of landfill is gradually reduced, therefore, it is necessary to explore a kind of efficient processing unit to alleviate at sludge The pressure of reason.

Utility model content

The purpose of this utility model is to provide a kind of limekiln waste heat from tail gas reuse means, to solve above-mentioned background skill The problem of being proposed in art.

The utility model is achieved through the following technical solutions: a kind of limekiln waste heat from tail gas reuse means, including Limekiln chimney and storage mud tank, further include air-introduced machine, drier, roots blower, screw conveyor and dust-extraction unit, the storage Storage has wet mud in mud tank, and the wet mud is transmitted in drier by screw conveyor, and the limekiln chimney passes through Air-introduced machine is connected with drier, and the drier bottom is equipped with roots blower and blender, and drier top is equipped with exhanst gas outlet, The exhanst gas outlet is connected by pipeline with dust-extraction unit, smoke evacuation chimney.

Preferably, the drier be hollow cavity, drier outer surface on both sides of the middle respectively with air-introduced machine, helical feed Machine is connected.

Preferably, the dust-extraction unit is electricity-bag filter, and the electricity-bag filter bottom is collected equipped with dry mud Device, electricity-bag filter top are connected with smoke evacuation chimney.

Preferably, supersonic generator and stirring rod are equipped in the storage mud tank.

Preferably, the power of the roots blower is 50~60kw, and flow is 10000~15000m3/h, and operating pressure is 1500~2000Pa, revolving speed is in 2600rpm or more.

Compared with prior art, what the utility model reached has the beneficial effect that:

A kind of limekiln waste heat from tail gas reuse means provided by the utility model, the high temperature that (1) can discharge limekiln The wet mud generated in paper making process is dried in tail gas, by be effectively arranged air-introduced machine, drier, roots blower, Auger conveyor can make wet mud keep suspended state in drier, while the high-temperature tail gas of limekiln discharge is to the wet of suspension Sludge carries out continuous flow-disturbing heat drying, and the dry sludge efficiency of the utility model is strong, can form the drying of original mud shape The graininess of grains of sand size is conducive to transport and burn, while can sufficiently recycle in the high-temperature tail gas that limekiln is discharged Heat, it is environmentally protective.

(2) the utility model locates wet mud by the way that supersonic generator and stirring rod is arranged in storage mud tank in advance Reason, can be such that the content of organic matter in sludge declines, be more advantageous to the conversion of resource, while also the dehydration property of sludge can be made more preferable, The water content of mud cake is lower.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only the preferred reality of the utility model Example is applied, it for those of ordinary skill in the art, without any creative labor, can also be attached according to these Figure obtains other attached drawings.

Fig. 1 is a kind of structure chart of limekiln waste heat from tail gas reuse means provided by the utility model.

In figure, the limekiln 1- chimney, 2- storage mud tank, 3- air-introduced machine, 4- screw conveyor, 5- drier, 6- roots blower, 7- blender, 8- flue, 9- electricity-bag filter, the dry mud collector of 10-, 11- smoke evacuation chimney, 12- supersonic generator.

Specific embodiment

In order to be best understood from the utility model technology contents, specific embodiment is provided below, and practical to this in conjunction with attached drawing It is novel to be described further.

Referring to Fig. 1, a kind of limekiln waste heat from tail gas reuse means, including limekiln chimney 1 and storage mud tank 2, also wrap Air-introduced machine 3, drier 5, roots blower 6, screw conveyor 4 and dust-extraction unit are included, storage has wet mud in the storage mud tank 2, The wet mud is transmitted in drier 5 by screw conveyor 4, and the limekiln chimney 1 can be 180 DEG C to 250 DEG C by temperature Between high temperature and pressure tail gas be delivered in drier 5 by air-introduced machine 3,5 bottom of drier is equipped with roots blower 6 and blender 7, bulk wet mud can be crushed by the blender 7, carry out hot transmitting, the roots blower convenient for sludge and high-temperature tail gas 6 can convey high speed, high wind power into drier 5, and the sludge in drier 5 is made to be able to maintain suspended state, 5 top of drier Equipped with exhanst gas outlet, sludge after drying because drying out, sludge by the dry graininess for forming grains of sand size, on Rise air-flow and take mud granule in dust-extraction unit through flue 8 by exhanst gas outlet to, by dust-extraction unit collection and unload Material becomes finished product, obtains dewatered sludge, and filtered low-temperature flue gas is finally discharged by smoke evacuation chimney 11.

Specifically, the drier 5 is hollow cavity, sludge and high-temperature tail gas can be effectively accommodated, in 5 outer surface of drier The two sides of portion's same level are connected with the outlet of air-introduced machine 3, the outlet of screw conveyor 4 respectively, can make the air intake vent of drier 5 Interference complementary with sludge inlet, avoids sludge from blocking air intake vent.

Specifically, the dust-extraction unit is electricity-bag filter 9, described in one embodiment of the utility model 9 bottom of electricity-bag filter is equipped with dry mud collector 10, collects the dry mud obtained of electricity-bag filter 9, collected Dry mud can be transported to boiler and carry out second-time burning, and 9 top of electricity-bag filter is connected with smoke evacuation chimney 11, after filtering Flue gas by smoke evacuation chimney 11 outward discharge.

In one embodiment of the utility model, it is equipped with supersonic generator 12 and stirring rod in the storage mud tank 2, is led to It crosses supersonic generator 12 and stirring rod to pre-process the wet mud in storage mud tank 2, declines the content of organic matter in sludge, Resource utilization is made it easier for, while also sludge can be made to have stronger dehydration property, keeps moisture content of the cake lower.

Specifically, the power setting of the roots blower 6 is 50~60kw in one embodiment of the utility model, Flow set is 10000~15000m3/h, and operating pressure is set as 1500~2000Pa, and revolving speed is arranged in 2600rpm or more, The roots blower 6 can convey high-speed flow into drier 5.

Working principle are as follows: when work, 180 DEG C of delivery temperature is extremely into drier 5 by limekiln chimney 1, air-introduced machine 3 High temperature and pressure tail gas between 250 DEG C is conveyed through ultrasonic wave into drier 5 by storage mud tank 2, screw conveyor 4 The pretreated wet mud of device 12 can be such that sludge keeps in drier 5 by the collective effect of roots blower 6 and blender 7 Suspended state enables sludge that can adequately carry out heat exchange with high-temperature tail gas, sludge can be made to be dried to be easy to transport burning Granular sand, and collection is filtered by electricity-bag filter 9 and dry mud collector 10, it finally will be collected dry The sludge of change is sent to boiler burning, and the dewatered sludge of this practical generation has preferable efficiency of combustion, while can also reduce lime The flue-gas temperature of kiln discharge does not increase the secondary investment of the energy, investment of the production process without other fuel and raw material.Separately Outside, this practical procedure for producing is simple, and product can be directly thrown into boiler and burn, the fire coal as replacement of fuel part.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent substitution, improvement and etc. done should be included in the utility model Within the scope of protection.

Claims

1. a kind of limekiln waste heat from tail gas reuse means, including limekiln chimney and storage mud tank, which is characterized in that further include Air-introduced machine, drier, roots blower, screw conveyor and dust-extraction unit, storage has wet mud, the wet dirt in the storage mud tank Mud is transmitted in drier by screw conveyor, and the limekiln chimney is connected by air-introduced machine with drier, the drying Device bottom is equipped with roots blower and blender, and drier top is equipped with exhanst gas outlet, and the exhanst gas outlet passes through pipeline and dedusting Device, smoke evacuation chimney are connected.

2. a kind of limekiln waste heat from tail gas reuse means according to claim 1, which is characterized in that the drier is Hollow cavity, drier outer surface on both sides of the middle are connected with air-introduced machine, screw conveyor respectively.

3. a kind of limekiln waste heat from tail gas reuse means according to claim 1, which is characterized in that the dust-extraction unit For electricity-bag filter, the electricity-bag filter bottom is equipped with dry mud collector, electricity-bag filter top and smoke evacuation chimney It is connected.

4. a kind of limekiln waste heat from tail gas reuse means according to claim 1, which is characterized in that in the storage mud tank Equipped with supersonic generator and stirring rod.

5. a kind of limekiln waste heat from tail gas reuse means according to claim 1, which is characterized in that the roots blower Power be 50~60kw, flow be 10000~15000m3/h, operating pressure be 1500~2000Pa, revolving speed is in 2600rpm More than.