CN210741126U

CN210741126U - Waste heat recycling device of mesh belt kiln

Info

Publication number: CN210741126U
Application number: CN201921611266.4U
Authority: CN
Inventors: 梁斌华; 童翠香; 高昇; 李启斌
Original assignee: Anhui Yuanchen Environmental Protection Science and Technology Co Ltd
Current assignee: Anhui Yuanchen Environmental Protection Science and Technology Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-06-12
Anticipated expiration: 2029-09-25

Abstract

The utility model belongs to the technical field of flue gas waste heat recovery and reuse, in particular to a waste heat reuse device of a mesh belt kiln, which comprises a bag-type dust remover, a mixer, a secondary drying chamber and a spray tower which are connected in sequence through pipelines, wherein the inlet end of the bag-type dust remover is communicated to the mesh belt kiln through an air inlet pipeline; a fresh air regulating valve is arranged on a first pipeline between the bag-type dust collector and the mixer, and a temperature sensor is arranged at the air outlet end of the mixer and used for feeding back and regulating the valve opening of the fresh air regulating valve; a centrifugal fan is arranged on a second pipeline between the mixer and the secondary drying chamber and used for generating suction force to send the waste flue gas in the mesh belt kiln into the secondary drying chamber after sequentially passing through the bag-type dust remover and the mixer; through the use of the waste heat recycling device, the device can replace the electric heating, the boiler heating or the gas heating adopted in the traditional secondary drying chamber, and makes important contribution to the energy saving and expenditure saving of units or enterprises.

Description

Waste heat recycling device of mesh belt kiln

Technical Field

The utility model belongs to the technical field of flue gas waste heat recovery recycles, specifically a waste heat recycling device of mesh belt kiln.

Background

With the continuous promotion of the policy of energy conservation and emission reduction, the waste heat recovery and the reutilization of various devices are continuously applied to various heating devices. The mesh belt kiln is a heating furnace for continuously conveying parts in the furnace through mesh belts, and is mainly used for the processes of pre-sintering, sintering or heat treatment of powder metallurgy products, metal powder reduction and electronic products in protective atmosphere or air. The guipure kiln can have a large amount of heat energy to distribute out when using to, contain a large amount of particulate matters in the exhaust fume that the guipure kiln discharged, this has caused inconvenience to the thermal recovery in the exhaust fume.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waste heat recycling device of guipure kiln realizes the high-efficient recycle of heat in the waste flue gas that the guipure kiln discharged.

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

a waste heat recycling device of a mesh belt kiln comprises a bag-type dust collector, a mixer, a secondary drying chamber and a spray tower which are sequentially connected through a pipeline;

the inlet end of the bag-type dust collector is communicated to the mesh belt kiln through an air inlet pipeline and is used for collecting waste flue gas generated in the mesh belt kiln;

a fresh air regulating valve is arranged on a first pipeline between the bag-type dust collector and the mixer, and a temperature sensor is arranged at the air outlet end of the mixer and used for adjusting the valve opening of the fresh air regulating valve in a feedback manner;

a centrifugal fan is arranged on a second pipeline between the mixer and the secondary drying chamber, and the centrifugal fan generates suction force to send the waste flue gas in the mesh belt kiln into the secondary drying chamber after sequentially passing through the bag-type dust collector and the mixer;

the secondary drying chamber is communicated to the spray tower through a moisture exhaust pipeline, and the gas is purified by the spray tower and then is discharged after reaching the standard.

Preferably, the second pipeline is provided with a three-way valve, and the waste flue gas is led to the secondary drying chamber or the spray tower through the three-way valve.

Preferably, the secondary drying chambers are provided with a plurality of secondary drying chambers, the secondary drying chambers are respectively communicated to the second pipelines through branch pipes, and electric gate valves are arranged on the branch pipes and used for controlling the on-off of the branch pipes.

Preferably, a circulating fan is arranged in the secondary drying chamber and used for accelerating the air flow in the secondary drying chamber.

Preferably, the secondary drying chamber is internally provided with a moisture exhausting fan, and the moisture exhausting fan is arranged at the moisture exhausting pipeline and used for exhausting hot and humid air in the secondary drying chamber.

Preferably, a baffle is arranged in the mixer, and through holes arranged at intervals are formed in the baffle and used for mixing hot flue gas flowing in from the bag-type dust remover and cold air flowing in from the fresh air adjusting valve;

and a condensate pipe is arranged at the bottom end of the mixer and used for discharging condensate water generated after cold air and hot air are mixed.

Preferably, stainless steel balls are arranged in the spray tower and used for increasing the contact area of air and water.

Compared with the prior art, the utility model discloses following technological effect has:

the utility model provides a waste heat recycling device of guipure kiln, through collecting the exhaust fume with guipure kiln and get rid of behind the dust wherein leading-in to adjust to suitable temperature in the blender, treat dry article and carry out drying process in reintroducing to the second grade drying chamber, effectual heat that is rich in the exhaust fume who has utilized guipure kiln, in addition, use through above-mentioned waste heat recycling device, can replace the electrical heating of adopting in the traditional second grade drying chamber, boiler heating or gas heating, make important contribution for unit or enterprise's energy saving spending.

Drawings

Fig. 1 is a schematic view of a waste heat recycling device of a mesh belt kiln provided by the present invention;

fig. 2 is a schematic view of the equipment layout of the mesh belt kiln waste heat recycling device provided by the present invention;

the reference numbers in the figures illustrate: 10-bag-type dust collector, 11-inlet end, 12-gas inlet pipeline, 13-first pipeline, 20-mixer, 21-gas outlet end, 22-temperature sensor, 23-second pipeline, 231-three-way valve, 24-centrifugal fan, 25-baffle, 26-condensate pipe, 30-secondary drying chamber, 31-moisture-discharging pipeline, 32-branch pipe, 321-electric gate valve, 40-spray tower and 50-fresh air regulating valve.

Detailed Description

In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further clarified by combining the specific drawings.

It should be noted that, in the present invention, when an element is referred to as being "fixed" to another element, it may 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. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

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 herein in the description of the invention 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.

Referring to fig. 1, the utility model provides a waste heat recycling device of a mesh belt kiln, which comprises a bag-type dust collector 10, a mixer 20, a secondary drying chamber 30 and a spray tower 40 which are connected in sequence through pipelines; an inlet end 11 of the bag-type dust collector 10 is communicated to a mesh belt kiln through an air inlet pipeline 12 and is used for collecting waste flue gas generated in the mesh belt kiln; a fresh air regulating valve 50 is arranged on a first pipeline 13 between the bag-type dust collector 10 and the mixer 20, and a temperature sensor 22 is arranged at an air outlet end 21 of the mixer 20 and used for feedback regulation of the valve opening degree of the fresh air regulating valve 50; a centrifugal fan 24 is arranged on a second pipeline 23 between the mixer 20 and the secondary drying chamber 30, and the centrifugal fan 24 generates suction force to send the waste flue gas in the mesh belt kiln into the secondary drying chamber 30 after sequentially passing through the bag-type dust collector 10 and the mixer 20; the secondary drying chamber 30 is communicated to the spray tower 40 through a moisture exhaust pipeline 31, and the gas is purified by the spray tower 40 and then is discharged after reaching the standard.

The utility model provides a waste heat recycling device of this mesh belt kiln, when specifically using, through setting up 24 production suction of centrifugal fan on second pipeline 23 with the waste flue gas in the mesh belt kiln collect to sack cleaner 10, utilize the dust filtration of sack cleaner 10 in with the waste flue gas to fall, through the temperature that mixer 20 adjusted waste flue gas again, then input the second grade drying chamber 30 in, carry out drying process to the article of treating that places in second grade drying chamber 30. After a certain period of time, the moisture content of the to-be-dried object in the secondary drying chamber 30 is reduced to a required value, and the moisture detector detects and judges whether the to-be-dried object is dried or not, so that the to-be-dried object is replaced for continuous use. Through the use of the waste heat recycling device, the device can replace the electric heating, the boiler heating or the gas heating adopted in the traditional secondary drying chamber 30, and makes important contribution to saving energy expenditure of units or enterprises.

The utility model provides a waste heat recycling device of this mesh belt kiln is applicable to the temperature at the waste flue gas more than 80 ℃, and the temperature is at the waste flue gas below 80 ℃, and its utilization ratio is generally not high.

The bag-type dust collector 10 is used for filtering dust in waste flue gas, and adopts a bag made of high-temperature-resistant filtering materials, a bag cage keel made of carbon steel wires and compressed air controlled by a pulse valve to intermittently blow the dust or sundries on the bag, so that the air permeability of the bag is ensured.

The fresh air regulating valve 50 is used for supplementing air into the mixer 20, and the valve opening of the fresh air regulating valve 50 is steplessly regulated at 0-90 degrees through the driving of a motor; specifically, the temperature of the mixed gas is measured by the temperature sensor 22 arranged at the gas outlet end 21 of the mixer 20 and fed back to the PLC controller, and if the temperature of the mixed gas is greater than a preset value, the valve opening of the fresh air regulating valve 50 is controlled to be increased to increase the fresh air introduction amount; if the temperature of the mixed gas is less than the preset value, the valve opening of the fresh air regulating valve 50 is controlled to be reduced so as to reduce the fresh air introduction amount.

The utility model discloses in, second pipeline 23 on be equipped with three-way valve 231 to lead to second grade drying chamber 30 or spray column 40 with waste flue gas through this three-way valve 231, this three-way valve 231's use makes when need not utilizing waste flue gas's in the guipure kiln waste heat, directly handles waste flue gas in leading-in 40 spray column, handles the back up to standard and directly discharges.

The utility model discloses in, second grade drying chamber 30 be provided with a plurality ofly, and communicate to second pipeline 23 through branch pipe 32 respectively, branch pipe 32 on be equipped with electric gate valve 321 and be used for controlling the break-make of this branch pipe 32, so, the user can be as required with the leading-in second grade drying chamber 30 to needs of heat that contains in the guipure kiln exhaust gas to, also do not influence the use when changing the dry thing in second grade drying chamber 30. Specifically, as shown in fig. 1, two secondary drying chambers 30 are provided.

According to the utility model discloses, second grade drying chamber 30 in be equipped with circulating fan for air flow in the second grade drying chamber 30, so, shortened the drying time of treating dry article, improved the drying efficiency of treating dry article.

In the utility model, a dehumidifying fan is arranged in the secondary drying chamber 30 and is arranged at the dehumidifying pipeline 31 for discharging the damp and hot air in the secondary drying chamber 30; the exhaust volume of the dehumidifying fan is slightly larger than the suction volume of the centrifugal fan 24 arranged on the second pipeline 23, so that the state of micro negative pressure in the secondary drying chamber 30 is ensured, preferably, the rotating speed of the dehumidifying fan and the centrifugal fan 24 is adjusted, so that inward micro wind is generated at the gap at the inlet end of the secondary drying chamber 30, and the wind speed is kept at 0-100mm/s, and through the arrangement, the smoke can be effectively prevented from escaping to the surrounding environment through the possibly existing gap.

In the utility model, the mixer 20 is used for mixing cold air with relatively low temperature into the hot flue gas from the mesh belt kiln, so as to adjust the temperature of the gas introduced into the secondary drying chamber 30, and as a specific implementation mode of the mixer 20 for mixing the gas, a baffle 25 is arranged in the mixer 20, and through holes arranged at intervals are arranged on the baffle 25 and used for mixing the hot flue gas flowing from the bag-type dust collector 10 and the cold air flowing from the fresh air regulating valve 50; specifically, the baffle 25 is made of stainless steel 304; the bottom end of the mixer 20 is further provided with a condensate pipe 26 for discharging condensate water generated after the hot and cold air is mixed.

The utility model discloses in, spray tower 40 in be equipped with the area of contact that the stainless steel bobble is used for increasing air and water, specifically, this stainless steel bobble is formed for the preparation of 316 stainless steel material. The spray tower 40 internally comprises a demister, a circulating water tank, a sewage pump and the like, generated sewage is periodically pumped into a sewage treatment tank, and the treated water is discharged after being inspected by three parties and reaching the standard.

The utility model provides a waste heat recycling device of this mesh belt kiln generally is applicable to steel industry, kiln and calcines the trade, and discharge such as thermal power factory and rubber trade has the processing of heat waste gas.

Specifically, like traditional SCR catalyst monomer's dry mode that uses electrical heating goes on to dry processing SCR catalyst monomer 88 tons per month, the power consumption is 130215 degrees when adopting electrical heating, and adopt the utility model provides a device is recycled to waste heat of guipure kiln, second grade drying chamber 30 sets up to 3, same dry SCR catalyst monomer 88 tons, and actual power consumption is 86403 degrees, and the electric quantity 43812 degrees that has been showing has been practiced thrift, according to every degree electricity 0.75 yuan of calculation, can save the charges of electricity 32859 yuan per month, so, can practice thrift the charges of electricity about as high as 394308 yuan per year. Adopt the utility model provides a when the waste heat recycling device of mesh belt kiln carries out the drying, power consumptive equipment power consumption that mainly comes from centrifugal fan 24 and spray column 40.

The construction cost of the waste heat recycling device is not considered in the comparative test, and the test object is the SCR catalyst monomer in the adjacent month. But through the change of dry mode, dry with equivalent SCR catalyst monomer, the reduction that total power consumption is showing, consequently, through the utility model provides a waste heat recycling device, the effectual waste heat that utilizes the guipure kiln has reached good economic benefits.

Referring to fig. 2, in the present invention, the bag-type dust collector 10 and the mixer 20 used in cooperation therewith are connected to a plurality of gas inlet pipes 12 communicated to a plurality of different mesh-belt kilns, wherein the bag-type dust collector 10 is provided with a plurality of gas inlet pipes; the hot gas from the mixer 20 is introduced into the various secondary drying chambers 30 through a plurality of manifolds 32 for drying the articles to be dried, the spray tower 40 not being shown in detail in fig. 2.

The foregoing shows and describes the general principles, essential features, and features of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the description of the above embodiments and the description is only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications are all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A waste heat recycling device of a mesh belt kiln is characterized by comprising a bag-type dust collector (10), a mixer (20), a secondary drying chamber (30) and a spray tower (40) which are sequentially connected through pipelines;

the inlet end (11) of the bag-type dust collector (10) is communicated to the mesh belt kiln through a gas inlet pipeline (12) and is used for collecting waste flue gas generated in the mesh belt kiln;

a fresh air regulating valve (50) is arranged on a first pipeline (13) between the bag-type dust collector (10) and the mixer (20), and a temperature sensor (22) is arranged at an air outlet end (21) of the mixer (20) and used for regulating the valve opening of the fresh air regulating valve (50) in a feedback manner;

a centrifugal fan (24) is arranged on a second pipeline (23) between the mixer (20) and the secondary drying chamber (30), the centrifugal fan (24) generates suction force to send waste flue gas in the mesh belt kiln into the secondary drying chamber (30) after sequentially passing through the bag-type dust collector (10) and the mixer (20);

the secondary drying chamber (30) is communicated to the spray tower (40) through a moisture exhaust pipeline (31), and the gas is purified by the spray tower (40) and then is discharged after reaching the standard.

2. The waste heat recycling device of the mesh belt kiln as claimed in claim 1, wherein the second pipeline (23) is provided with a three-way valve (231), and the waste flue gas is led to the secondary drying chamber (30) or the spray tower (40) through the three-way valve (231).

3. The waste heat recycling device of the mesh belt kiln as claimed in claim 1, wherein a plurality of secondary drying chambers (30) are provided and are respectively communicated to the second pipeline (23) through branch pipes (32), and electric gate valves (321) are provided on the branch pipes (32) for controlling the on-off of the branch pipes (32).

4. The waste heat recycling device of the mesh belt kiln as claimed in claim 1, wherein a circulating fan is arranged in the secondary drying chamber (30) for accelerating the air flow in the secondary drying chamber (30).

5. The waste heat recycling device of the mesh belt kiln as claimed in claim 1, wherein a moisture exhaust fan is arranged in the secondary drying chamber (30), and the moisture exhaust fan is arranged at the moisture exhaust pipeline (31) and used for exhausting hot and humid air in the secondary drying chamber (30).

6. The waste heat recycling device of the mesh belt kiln as claimed in claim 1, wherein a baffle (25) is arranged in the mixer (20), and through holes arranged at intervals are arranged on the baffle (25) and used for mixing hot flue gas flowing in from the bag-type dust collector (10) and cold air flowing in from the fresh air regulating valve (50);

and a condensate pipe (26) is also arranged at the bottom end of the mixer (20) and is used for discharging condensate water generated after the cold air and the hot air are mixed.

7. The waste heat recycling device of the mesh belt kiln as claimed in claim 1, wherein stainless steel pellets are arranged in the spray tower (40) for increasing the contact area of air and water.