CN218723063U - Process air system of belt type roasting machine - Google Patents
Process air system of belt type roasting machine Download PDFInfo
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- CN218723063U CN218723063U CN202222997917.6U CN202222997917U CN218723063U CN 218723063 U CN218723063 U CN 218723063U CN 202222997917 U CN202222997917 U CN 202222997917U CN 218723063 U CN218723063 U CN 218723063U
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Abstract
The embodiment of the application discloses a belt type roasting machine process air system, which changes the circulation flow direction of process air. The waste gas generated in the roasting back zone of the soaking zone and the roasting zone is used as regenerative air to be supplied to the preheating front zone and the preheating middle zone of the preheating zone, the hot air generated in the cooling two-zone section is supplied to the air draft drying zone, the waste gas generated in the roasting back zone of the soaking zone and the roasting zone is replaced and is used as regenerative air to be supplied to the air draft drying zone, and SO is prevented from being contained 2 And NO x When the waste gas of the corrosive gas is brought into the air draft drying section, the risk of corrosion of the air draft drying section and a pipeline connected with the air draft drying section is reduced; simultaneously because the hot-blast of the cooling two-stage process that supplies the convulsions drying section is pure air, even the gas of convulsions drying section gets into the forced air drying section, can not cause the pipeline corrosion that forced air drying section and be connected with the forced air drying section yet, the exhaust waste gas of forced air drying section exhaust also accords with the environmental protection requirement.
Description
Technical Field
The application relates to the technical field of pellet production, in particular to a belt type roasting machine process air system.
Background
The process air system of the belt type roasting machine comprises seven process sections, namely a blast drying section, an air draft drying section, a preheating section, a roasting section, a soaking section, a cooling section and a cooling section. The cooling fan blows ambient air into the cooling first section and the cooling second section, hot air generated by the cooling second section is supplied to the blast drying section through the blast drying fan after heat exchange with the pellets, primary drying is carried out on the pellets, and waste gas in the blast drying section is discharged into the atmosphere after dust removal; hot air generated in the cooling section is supplied to a soaking section, a roasting section and a preheating section and is used for preheating, roasting and homogenizing the pellets, hot waste gas in roasting areas of the soaking section and the roasting section is collected and then serves as hot return air, the hot return air returns to the belt type roasting machine system through a heat return fan, most of the hot return air enters an air draft drying section, and the rest of the hot return air enters a preheating front area of the preheating section as required; and hot waste gas in the air draft drying section, the preheating section and the roasting front area is converged under the action of the main exhaust fan, and is discharged into the atmosphere after dust removal and desulfurization and denitrification treatment after being converged.
In the prior art air system of the belt type roasting machine, hot air in an induced draft drying section mainly comes from return hot air in a roasting section and a soaking section, and the return hot air contains SO 2 And NO x When corrosive gas is used, the air draft drying section and the air draft drying section are connected to carry out anti-corrosion treatment on the pipeline, and the air cross phenomenon exists between the air draft drying section and the air blast drying section, SO that the air blast drying section and the pipeline connected with the air blast drying section are corroded, and the exhaust waste gas of the air blast drying section also contains SO 2 And NO x And the like, which causes the exhaust emission to exceed the standard.
Therefore, how to reduce the risk that the exhaust drying section and the pipeline connected with the exhaust drying section and the blast drying section and the pipeline connected with the blast drying section are corroded and prevent the exhaust gas discharged from the blast drying section from exceeding the standard becomes a technical problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The application provides a belt type roasting machine process air system to reduce convulsions drying section and the pipeline of being connected with convulsions drying section and the risk that the pipeline of forced draught drying section and being connected with forced draught drying section is corroded, prevent simultaneously that forced draught drying section exhaust waste gas from exceeding standard.
In order to achieve the aim, the application provides a belt type roasting machine process air system which comprises an air blowing drying section, an air extracting drying section, a preheating section, a roasting section, a soaking section and a cooling section,
along the moving direction of the material layer, the cooling section comprises a cooling first section, a cooling second section and a cooling third section,
the hot air generated at the cooling section is fed into the soaking section, the roasting section and the preheating rear zone and the preheating middle zone of the preheating section,
the hot air generated by the cooling two-stage section is fed into the pre-heating front area of the air draft drying section and the pre-heating section,
the hot air generated by the three cooling sections is supplied to the forced air drying section,
and waste gas generated in the soaking section and the roasting rear area of the roasting section is used as regenerative hot air to be supplied to the preheating front area and the preheating middle area of the preheating section.
Preferably, in the above-mentioned process air system for a belt-type roasting machine, a part of the hot air generated at the cooling section is fed into the soaking section, another part of the hot air generated at the cooling section is collected into the secondary air main pipe, and the secondary air main pipe is communicated with the roasting section and the middle and rear preheating zones of the preheating section through a downcomer.
Preferably, in the above-mentioned process air system of the travelling grate, the downcomers are symmetrically distributed on both sides of the secondary air main pipe.
Preferably, in the above-mentioned belt-type roasting machine process air system, the system further comprises a cooling fan, and the cooling fan is used for supplying ambient air to the air draft drying section.
Preferably, in the above-mentioned process air system for a straight grate roaster, a first pipeline is arranged on the cooling secondary section,
a second pipeline is arranged on the soaking section and the roasting rear area of the roasting section,
the preheating front region of the preheating section is provided with a first branch pipeline which is communicated with the first pipeline through a third pipeline, the third pipeline is provided with a first valve,
the first branch line communicates with the second line.
Preferably, in the above-mentioned process air system for a belt-type roasting machine, the preheating middle area is provided with a second branch pipeline, the second branch pipeline is communicated with the second pipeline, and the second branch pipeline is provided with a second valve.
Preferably, in the above-mentioned process air system of the travelling grate, a first exhaust gas discharge pipe is arranged on the induced draft drying section, and the first exhaust gas discharge pipe is communicated with a second exhaust gas discharge pipe of the forced draft drying section.
Preferably, in the above-mentioned process air system of the travelling grate, a fan is disposed on the first exhaust gas discharge pipe.
Preferably, in the above-mentioned belt-type roasting machine process air system, a waste gas treatment pipeline is further included, which is communicated with the preheating section and the pre-roasting area of the roasting section, and the waste gas treatment pipeline can be communicated with a waste gas treatment device.
The process air system of the belt-type roasting machine provided by the embodiment of the application changes the circulating flow direction of the process air. The waste gas generated in the roasting back zone of the soaking zone and the roasting zone is used as backheating air to be supplied to the preheating front zone and the preheating middle zone of the preheating zone, the hot air generated in the cooling two-zone is supplied to the induced draft drying zone, the waste gas generated in the roasting back zone of the soaking zone and the roasting zone is replaced and is used as backheating air to be supplied to the induced draft drying zone, SO that SO is prevented from being contained 2 And NO x When the waste gas of the corrosive gas is brought into the air draft drying section, the risk of corrosion of the air draft drying section and a pipeline connected with the air draft drying section is reduced; meanwhile, because the hot air supplied to the cooling two-stage section of the air draft drying section is pure air, even if the gas of the air draft drying section enters the air blast drying section, the air blast drying section and the air blast drying section can not be causedThe pipeline connected with the air blowing drying section is corroded, and waste gas discharged from the air blowing drying section also meets the requirement of environmental protection.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some examples or embodiments of the present application, and that for a person skilled in the art, other drawings can be obtained from the provided drawings without inventive effort, and that the present application can also be applied to other similar scenarios from the provided drawings. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.
Fig. 1 is a schematic structural view of a process air system of a straight grate roaster according to the present application.
Wherein:
1. the device comprises a forced air drying section, 111, a second waste gas discharge pipe, 2, an air draft drying section, 21, a first waste gas discharge pipe, 3, a preheating section, 4, a roasting section, 5, a soaking section, 6, a cooling section, 61, a cooling section, 62, a cooling section, 63, a cooling section, 7, a secondary air header pipe, 8, a downcomer, 9, a first pipeline, 10, a second pipeline, 11, a first branch pipeline, 12, a first valve, 13, a second valve, 14 and a waste gas treatment pipeline.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. The described embodiments are only some embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that, for the convenience of description, only the portions related to the related applications are shown in the drawings. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be understood that "system", "apparatus", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" are intended to cover only the explicitly identified steps or elements as not constituting an exclusive list and that the method or apparatus may comprise further steps or elements. An element defined by the phrase "comprising a component of ' 8230 ' \8230; ' does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
Referring to fig. 1, some embodiments of the present application disclose a belt type roasting machine process air system, which includes a forced air drying section 1, an induced air drying section 2, a preheating section 3, a roasting section 4, a soaking section 5, and a cooling section 6.
Along the moving direction of the material layer, the preheating section 3 is divided into a preheating front area, a preheating middle area and a preheating rear area;
along the moving direction of the material layer, the roasting section 4 is divided into a roasting front area and a roasting rear area, and the temperature of the roasting front area is lower than that of the roasting rear area;
along the moving direction of the material layer, the cooling section 6 comprises a cooling section 61, a cooling section 62 and a cooling section 63, partition walls are arranged between the cooling section 61 and the cooling section 62 and between the cooling section 62 and the cooling section 63, and the cooling section 61 is communicated with the soaking section 5.
The cooling fan blows ambient air into the cooling first section 61, the cooling second section 62 and the cooling third section 63 to cool the pellets in the cooling section 6, and the temperature of hot air generated by the cooling first section 61, the cooling second section 62 and the cooling third section 63 is reduced in sequence.
As shown in fig. 1, the hot air generated by the cooling section 61 is supplied to the preheating rear area and the preheating middle area of the soaking section 5, the roasting section 4 and the preheating section 3, the temperature of the cooling section 61 of the cooling section 6 is the highest, and the hot air of the cooling section 61 flows to the preheating rear area and the preheating middle area of the soaking section 5, the roasting section 4 and the preheating section 3 to perform soaking, roasting and preheating on the pellets respectively;
hot air generated by the cooling second section 62 is supplied to the pre-heating front areas of the air draft drying section 2 and the pre-heating section 3;
the hot air generated by the three cooling sections 63 is supplied to the blast drying section 1, the hot air of the three cooling sections 63 is used for primary drying of the pellets, and a blast drying fan is arranged on a pipeline which is communicated with the blast drying section 1 of the three cooling sections 63.
The temperatures of the preheating front zone, the preheating middle zone and the preheating rear zone are gradually increased, the heat of the preheating zone mainly comes from fuel combustion, the hot air temperature of the cooling section 61 highly cools the second section 62, and the cooling section 61 with high hot air temperature supplements heat for the preheating middle zone and the preheating rear zone of the soaking section 5, the roasting section 4 and the preheating section 3 with high temperature requirements, so that the consumed fuel is reduced. The hot air in the cooling second section 62 supplements the heat for the pre-heating front areas of the air draft drying section 2 and the pre-heating section 3 with low temperature requirements.
The required hot-blast temperature of 2 hot-blast temperature in convulsions drying section is less than preheating section 3 and preheats the back district and preheat the middle district, and the required hot-blast temperature of calcination section 4 and soaking section 5, carries out the concurrent heating through the low cooling two-stage process 62 of hot-blast temperature to convulsions drying section 2 and the preceding district that preheats that the temperature demand is low in this application, reduces thermal waste. If the temperature of the hot air supplied through the cooling section 62 exceeds the temperature of the hot air required by the suction drying section 2, the temperature is reduced by hot air of the cold air exchanger.
In the application, the heat supplementing means of the roasting section 4 can supplement heat to the roasting section 4 by cooling hot air of the first section 61 besides burner combustion heat supplementing, so that energy consumption is reduced.
The hot air of the first cooling section 61 and the second cooling section 62 can supplement heat for the roasting section 4 and the preheating section 3, and when the oxygen content of the belt roasting machine is low, the high-temperature regenerative waste gas of the first cooling section 61 and the second cooling section 62 can also be used as combustion-supporting air, so that the roasting section 4 and the preheating section 3 can reach the required temperature under the condition of low heat value.
The belt type roasting machine process air system disclosed by the application utilizes return hot air with different temperatures generated by the belt type roasting machine process air system to finely utilize the hot air generated by the cooling section 6, so that the pellet roasting process can be better completed, and the energy consumption is reduced.
The heat of the air draft drying section 2 comes from the cooling second section 62, the hot air of the cooling second section 62 is ambient air and does not contain SO2, NOx and other corrosive gases, and therefore the air draft drying section 2 and the pipeline communicated with the air draft drying section 2 do not need to be subjected to anti-corrosion treatment, and cost is reduced.
The exhaust gas generated in the post-baking zone of the soaking zone 5 and the baking zone 4 is supplied as regenerative air to the middle preheating zone and the front preheating zone of the preheating zone 3 through the second pipeline 10. Corrosive gases such as SO2 and NOx are generated in the preheating section 3, the roasting section 4 and the soaking section 5, namely, the waste gas generated in the soaking section 5 and the roasting rear area of the roasting section 4 contains corrosive gases such as SO2 and NOx, the waste gas generated in the preheating middle area and the preheating front area also contains corrosive gases such as SO2 and NOx, namely, the waste gas containing the corrosive gases such as SO2 and NOx can only circulate in the space generating the waste gas containing the corrosive gases such as SO2 and NOx, and cannot enter other areas, SO that the risk of corrosion in other areas is reduced.
In the preheating section 3 and the roasting front section, an exhaust gas treatment pipeline 14 is arranged for treating dust, SO2, NOx and other corrosive gases in the exhaust gas.
The process air system of the belt type roasting machine changes the circulating flow direction of process air. The waste gas generated in the roasting back zone of the soaking zone 5 and the roasting zone 4 is used as regenerative air to be supplied to the preheating front zone and the preheating middle zone of the preheating zone 3, the hot air generated in the cooling two-stage zone 62 is supplied to the air draft drying zone 2, the waste gas generated in the roasting back zone of the soaking zone 5 and the roasting zone 4 is replaced and is used as regenerative air to be supplied to the air draft drying zone 2, and SO is prevented from being contained 2 And NO x When the waste gas of the corrosive gas is brought into the air draft drying section 2, the risk of corrosion of the air draft drying section 2 and a pipeline connected with the air draft drying section 2 is reduced; simultaneously because the hot-blast of the cooling two-stage process 62 that supplies convulsions drying section 2 is pure air, even the gas of convulsions drying section 2 gets into the dry section 1 of blast air, can not cause the dry section 1 of blast air and the pipeline corrosion of being connected with the dry section 1 of blast air yet, the dry section 1 exhaust waste gas of blast air also accords with the environmental protection requirement.
The hot air generated by the cooling section 61 is divided into two parts, wherein one part is directly supplied to the soaking section 5 through the cooling section 61, the other part is supplied to the secondary air header pipe 7, and the secondary air header pipe 7 is supplied to the roasting section 4, the preheating rear zone and the preheating middle zone through the downcomer 8. The hot air generated by the cooling section 61 is pure air.
The cooling section 61 is communicated with the soaking section 5, and hot air generated by the cooling section 61 can be directly supplied to the soaking section 5 through the communication position of the cooling section 61 and the soaking section 5. The hot air for cooling the first section 61 is directly supplied to the soaking section 5, SO as to prevent SO from being contained in the soaking section 5 2 And NO x And the waste gas of the corrosive gas enters the cooling section 6, so that the risk of corrosion of the cooling section 6 and the air draft drying section 2 is further reduced.
The roasting section 4, the preheating rear zone and the preheating middle zone are connected through a secondary air main pipe 7 and a downcomer 8, and compared with a mode of supplying air through a main air inlet, the problems that hot air is not uniformly distributed in the roasting section 4, the preheating rear zone and the preheating middle zone can be solved through the air supply of a plurality of downcomers 8, and the temperature in the hearth is controlled within a set range.
The quantity of the down pipes 8 arranged in the roasting section 4, the preheating rear area and the preheating middle area is set according to the heat supply requirement.
The preheating middle area is provided with a burner, heat is supplied to the preheating middle area through the burner,
preferably, the downcomers 8 are symmetrically distributed on both sides of the secondary air main 7.
The hot air generated in the cooling section 62 is fed into the pre-heating front area of the pre-heating section 3 of the draft drying section 2 and the pre-heating section 3.
The cooling second section 62 is provided with a first pipeline 9, the roasting back sections of the soaking section 5 and the roasting section 4 are provided with a second pipeline 10, the preheating front section of the preheating section 3 is provided with a first branch pipeline 11, the first branch pipeline 11 is communicated with the second pipeline 10, the first branch pipeline 11 is communicated with the first pipeline 9 through a third pipeline, and the third pipeline is provided with a first valve 12.
The hot air source of the preheating zone front of the preheating section 3 is two, wherein one source is the cooling zone 62, the other source is the return air, and the main source is the return air.
The third pipeline is provided with a first valve 12 for adjusting the amount of hot air fed into the pre-heating front zone through the cooling section 62 to adjust the temperature of the furnace. The preheating front area is not provided with a burner.
The preheating middle area is provided with a second branch pipeline besides a down pipe 8, the second branch pipeline is communicated with a second pipeline 10, and a second valve 13 is arranged on the second branch pipeline.
The hot air source in the middle preheating area has two sources, wherein one source is the return hot air, and the other source is the cooling section 61.
The quantity of the regenerative air fed into the preheating middle area by the regenerative air is adjusted by adjusting the second valve 13, the temperature of the hearth is adjusted, and the preheating middle area is provided with burners.
The first valve 12 and the second valve 13 enable the flow of the third line and the second branch to be regulated in order to make the temperature of the preheating section 3 more easily as desired.
The process air system of the belt type roasting machine further comprises a cold air mixing machine, wherein the cold air mixing machine is used for feeding ambient air to the air draft drying section 2 and adjusting the temperature of hot air fed into the air draft drying section 2.
The amount of the ambient air entering the air draft drying section 2 is regulated and controlled by adjusting the parameters of the air mixing fan, the ambient air is mixed with the hot air from the cooling second section 62, and the air temperature of the air draft drying section 2 is controlled within a reasonable range, for example, the temperature of the air draft drying section 2 is controlled within 400 ℃.
If the air temperature of the air draft drying section 2 is higher than the preset air temperature, the amount of the ambient air is increased; if the air temperature of the air draft drying section 2 is lower than the preset air temperature, the amount of the ambient air is reduced.
Preferably, the cooling fan is arranged on the first duct 9.
The application discloses belt roasting machine technology air system is provided with first exhaust emission pipe 21 on convulsions drying section 2, is provided with second exhaust emission pipe 111 on the air blast drying section 1, first exhaust emission pipe 21 and second exhaust emission pipe 111 intercommunication.
And mixing the waste gas of the air draft drying section 2 with the waste gas of the air blast drying section 1, introducing the mixed waste gas into a dust removal system together, and discharging the mixed waste gas into the atmosphere after dust removal treatment.
As shown in fig. 1, a fan is disposed on the first exhaust gas discharge pipe 21 for pumping the exhaust gas of the suction drying section 2 to the second exhaust gas discharge pipe 111 for mixing with the exhaust gas generated by the blowing drying section 1.
An exhaust fan is arranged on the second exhaust gas discharge pipe 111 and used for providing power for the mixed exhaust gas to enter the dust removal system.
The flow direction of hot air of the forced air drying section 1 is from bottom to top, pure hot air firstly enters the forced air drying air box, upwards passes through the material layer to dry the material layer, and then enters the upper cover of the forced air drying section 1 to become waste gas; the flow of hot air in the air draft drying section 2 is from top to bottom, the hot air firstly enters the air draft upper cover, downwards passes through the material layer to dry the material layer, and then enters the air draft drying bellows to become waste gas. The heat release of the air draft drying section 2 comes from the cooling second section 62 and is pure hot air without SO2 and NOx, SO that the heat release can be mixed with the waste gas generated by the air draft drying section 1 for dedusting treatment, and here, the tail gas treatment is carried out on all the waste gas generated by the belt type roasting machine; and the tail gas does not contain corrosive gases such as SO2, NOx and the like, SO that the amount of the waste gas generated by desulfurization and denitrification treatment is reduced, and the production cost is reduced.
As shown in fig. 1, a regenerative fan is disposed on the second pipeline 10 and fed into the pre-heating front area and the pre-heating middle area through the regenerative fan.
The belt type roasting machine process air system further comprises a waste gas treatment pipeline 14 which is communicated with the pre-roasting areas of the preheating section 3 and the roasting section 4, and the waste gas treatment pipeline 14 can be communicated with a waste gas treatment device.
An exhaust fan is arranged on the waste gas treatment pipeline 14, waste gas generated in the pre-roasting area of the preheating section 3 and the roasting section 4 enters the waste gas treatment device under the action of the exhaust fan to be subjected to dust removal, desulfurization and denitrification, and the waste gas which meets the emission standard after dust removal and desulfurization and denitrification is discharged into the atmosphere.
Waste gas generated in the roasting front areas of the preheating section 3 and the roasting section 4 does not enter the air draft drying section 2, so that the air draft drying section 2 and pipelines do not need to be subjected to special anti-corrosion treatment, and the investment is reduced.
According to the scheme, the cooling section 6 is designed to be cooled in a three-section mode on the basis of the existing belt type roasting machine process air system, meanwhile, the corrosion of a blowing section pipeline, a dust removal facility and a chimney of the existing belt type roasting machine process air system is considered, the problems of large waste gas amount and high cost in desulfurization and denitrification treatment are solved, pure air for cooling the two-section 62 is introduced into the air draft drying section 2, the amount of waste gas containing corrosive gases such as NOx and SO2 is reduced, and meanwhile, the corrosion problem caused by the fact that the furnace mantle of the air draft drying section 2 is connected into the furnace mantle of the air draft drying section 1 in a hot air mode is avoided.
The source of the gas flowing into the cooling section 62 is ambient air, and is not the exhaust gas after desulfurization and denitrification in the preheating section 3 and the roasting section 4.
The waste gas after desulfurization and denitrification treatment is discharged to the atmosphere, the cooling section 6 is a total air inlet of a process air system of the belt type roasting machine, and the fed air is clean air.
The foregoing description is only illustrative of the preferred embodiments of the present application and the principles of the technology employed and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. The scope of the application referred to in the present application is not limited to the specific combinations of the above-mentioned features, and it is intended to cover other embodiments in which the above-mentioned features or their equivalents are arbitrarily combined without departing from the spirit of the application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. A belt type roasting machine process air system is characterized by comprising an air blowing drying section (1), an air extracting drying section (2), a preheating section (3), a roasting section (4), a soaking section (5) and a cooling section (6),
along the moving direction of the material layer, the cooling section (6) comprises a cooling section (61), a cooling section (62) and a cooling section (63),
the hot air generated by the cooling section (61) is fed into the soaking section (5), the roasting section (4) and the preheating rear zone and the preheating middle zone of the preheating section (3),
the hot air generated by the cooling section (62) is fed into the pre-heating fore-areas of the induced draft drying section (2) and the pre-heating section (3),
the hot air generated by the three cooling sections (63) is supplied to the forced air drying section (1),
and waste gas generated in the roasting back zone of the soaking zone (5) and the roasting zone (4) is used as regenerative hot air to be supplied to the preheating front zone and the preheating middle zone of the preheating zone (3).
2. The band-type roasting machine process air system according to claim 1, characterized in that a part of the hot air generated by the cooling section (61) is fed into the soaking section (5), another part of the hot air generated by the cooling section (61) is merged into a secondary air header pipe (7), and the secondary air header pipe (7) is communicated with the roasting section (4) and the middle and rear preheating zones of the preheating section (3) through a downcomer (8).
3. A travelling grate process air system according to claim 2, characterized in that the downcomers (8) are symmetrically distributed on both sides of the secondary air main (7).
4. The straight grate process air system of claim 1, further comprising a cooling air exchanger for feeding ambient air to the extraction drying section (2).
5. A band roaster process air system according to claim 1 wherein the cooling secondary section (62) is provided with a first pipe (9),
a second pipeline (10) is arranged on the roasting back area of the soaking section (5) and the roasting section (4),
a first branch pipeline (11) is arranged in a pre-heating front area of the pre-heating section (3), the first branch pipeline (11) is communicated with the first pipeline (9) through a third pipeline, a first valve (12) is arranged on the third pipeline,
the first branch line (11) communicates with the second line (10).
6. The travelling grate process air system according to claim 5, wherein a second branch line is provided in the preheating middle area, the second branch line communicating with the second line (10), and a second valve (13) is provided in the second branch line.
7. A grate process air system according to claim 1, characterized in that a first exhaust air discharge pipe (21) is arranged on the suction drying section (2), the first exhaust air discharge pipe (21) communicating with a second exhaust air discharge pipe (111) of the blast drying section (1).
8. A process air system of a straight grate machine according to claim 7, characterized in that a fan is arranged on the first exhaust gas discharge pipe (21).
9. A band-type roasting machine process air system according to claim 1, further comprising an exhaust gas treatment line (14) communicating with the preheating section (3) and the pre-roasting zone of the roasting section (4), the exhaust gas treatment line (14) being capable of communicating with an exhaust gas treatment device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222997917.6U CN218723063U (en) | 2022-11-10 | 2022-11-10 | Process air system of belt type roasting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222997917.6U CN218723063U (en) | 2022-11-10 | 2022-11-10 | Process air system of belt type roasting machine |
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| CN218723063U true CN218723063U (en) | 2023-03-24 |
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| CN202222997917.6U Active CN218723063U (en) | 2022-11-10 | 2022-11-10 | Process air system of belt type roasting machine |
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2022
- 2022-11-10 CN CN202222997917.6U patent/CN218723063U/en active Active
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