Constant temperature control drying equipment

Abstract

The utility model relates to the technical field of drying treatment, in particular to constant-temperature control drying equipment. Comprising a heat supply unit used for generating and transmitting heat, a feeding unit used for conveying wet materials and controlling the feeding frequency of the wet materials, a drying unit used for drying the wet materials, a dust removal unit used for collecting dust through an induced draft fan and a discharging unit used for collecting the dried materials. The heat supply unit is connected with the drying unit through a pipeline, the feeding unit is connected with the drying unit through a feeder, a temperature sensor is arranged between the drying unit and the dust removal unit, and the drying unit is connected with the discharging unit through a first belt conveyor. Wherein the drying unit is used for monitoring the drying temperature of the wet material through a temperature sensor and sending the drying temperature to at least one of the feeding unit, the heat supply unit and the dust removal unit, so that the at least one unit correspondingly adjusts to control the drying temperature to be within a preset temperature range.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drying treatment, especially relates to a constant temperature control drying equipment. BACKGROUND

[0002] The constant temperature control drying equipment of sludge or sand etc. is usually through burning natural gas, coal material, biomass or other heat carriers to provide heat, evaporate the moisture contained therein, and achieve the purpose of drying wet material. The drying equipment popular in the market at present is in a suspended state or a drum type, and the working principle of the drying equipment in a suspended state is mainly to make the material in a suspended state by using hot air flow, and realize material drying through efficient heat mass transfer.

[0003] Taking the drum type drying equipment as an example, the working principle thereof is mainly to realize material drying through heat transfer and material movement. However, most of the drum type drying equipment still continues to use the early pure relay type control system, and a small number of equipment manufacturers configure the PLC control system, but the overall degree of automation is still very low. Moreover, the equipment work is entirely dependent on the technical experience of workers on site, and workers need to check the temperature and pressure values in real time to control the sand input amount and the biomass (or natural gas) input amount, which has no regularity and is uncontrollable. This results in energy consumption, wet sand and other situations, frequent loss of production operators, loss of experience with personnel changes, and high energy consumption. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides a constant temperature control drying equipment, and the technical scheme is as follows:

[0005] A constant temperature control drying equipment, comprising: a heat supply unit for generating and transmitting heat, a feeding unit for conveying wet material and controlling the wet material input amount frequency, a drying unit for drying the wet material, a dust removal unit for collecting dust through an induced draft fan, and a discharging unit for collecting the dried material; the heat supply unit and the drying unit are connected through a pipeline, the feeding unit and the drying unit are connected through a feeder, a temperature sensor is arranged between the drying unit and the dust removal unit, and the drying unit and the discharging unit are connected through a first belt conveyor; wherein the drying unit is used for monitoring the drying temperature of the wet material through the temperature sensor, and sending the drying temperature to at least one unit of the feeding unit, the heat supply unit and the dust removal unit, so that the at least one unit is adjusted correspondingly to control the drying temperature to be in a preset temperature range.

[0006] As an optional implementation mode provided by the embodiment of the utility model, the feeding unit is specifically used for reducing the wet material feeding frequency when the drying temperature sent by the drying unit is lower than the lower limit of the preset temperature range, maintaining the wet material feeding frequency when the drying temperature sent by the drying unit is in the preset temperature range, and increasing the wet material feeding frequency when the drying temperature sent by the drying unit is higher than the upper limit of the preset temperature range.

[0007] As an optional implementation mode provided by the embodiment of the utility model, the heating unit is specifically used for adjusting the heating power or the biomass quantity according to the drying temperature sent by the drying unit, and the drying temperature and the heating power or the biomass quantity are in a positive proportional relationship.

[0008] As an optional implementation mode provided by the embodiment of the utility model, the dust removal unit is specifically used for adjusting the induced draft fan air volume according to the drying temperature sent by the drying unit, and the drying temperature and the induced draft fan air volume are in a positive proportional relationship.

[0009] As an optional implementation mode provided by the embodiment of the utility model, the drying unit further comprises: a drying roller for stirring the wet material; a dryer for conveying heat to the drying roller; and a negative pressure sensor for monitoring pressure data in the drying roller and sending the pressure data to the heating unit and / or the dust removal unit, so that the heating unit and / or the dust removal unit correspondingly adjust to control the pressure data to be in a preset pressure range.

[0010] As an optional implementation mode provided by the embodiment of the utility model, the feeding unit is further used for adjusting the heating power or the biomass quantity according to the pressure data sent by the drying unit, and the pressure data and the heating power or the biomass quantity are in a positive proportional relationship.

[0011] As an optional implementation mode provided by the embodiment of the utility model, the dust removal unit is further used for adjusting the induced draft fan air volume according to the pressure data sent by the drying unit, and the pressure data and the induced draft fan air volume are in a positive proportional relationship.

[0012] As an optional implementation mode provided by the embodiment of the utility model, the feeding unit further comprises: a storage bin for storing the wet material to be fed into the drying unit; a second belt conveyor for transmitting the wet material to the feeder; and a weighing system frequency converter for controlling the wet material feeding frequency into the feeder.

[0013] As an optional implementation mode provided by the embodiment of the utility model, the discharging unit comprises a cyclone unloader for separating dust from the dried material, a third belt conveyor for conveying the dried material to a storage device.

[0014] As an optional implementation mode provided by the embodiment of the utility model, the dust removal unit is further used for purifying the hot gas stream output by the drying unit.

[0015] The technical scheme provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0016] The embodiment of the present disclosure provides a constant temperature control drying equipment, which comprises a heat supply unit for generating and transmitting heat, a feeding unit for conveying wet materials and controlling the feeding frequency of the wet materials, a drying unit for drying the wet materials, a dust removal unit for collecting dust through an induced draft fan, and a discharging unit for collecting the dried materials; the heat supply unit is connected with the drying unit through a pipeline, the feeding unit is connected with the drying unit through a feeder, a temperature sensor is arranged between the drying unit and the dust removal unit, and the drying unit is connected with the discharging unit through a first belt conveyor; wherein the drying unit is used for monitoring the drying temperature of the wet materials through the temperature sensor and sending the drying temperature to at least one unit of the feeding unit, the heat supply unit and the dust removal unit, so that the at least one unit is adjusted correspondingly to control the drying temperature to be in a preset temperature range.

[0017] Therefore, the constant temperature control drying equipment can realize constant temperature automatic control without manual intervention, reduce labor cost, and improve the automation degree of the constant temperature control drying equipment. The equipment can operate under the most suitable temperature conditions, so that the drying process is kept in an efficient state, the energy is fully used for material drying, unnecessary energy waste is avoided, and the energy utilization efficiency is improved; the materials can be uniformly heated in the whole drying process, so that the uniformity of the drying effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present utility model, and together with the specification, serve to explain the principles of the present utility model.

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model or the prior art, the accompanying drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other accompanying drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1A A structure schematic diagram of a constant temperature control drying equipment provided by the embodiment of the present utility model;

[0021] Figure 1B A process schematic diagram of controlling the feeding amount of wet materials provided by the embodiment of the present utility model;

[0022] Figure 1C A process schematic diagram of controlling the feeding amount of wet materials provided by the embodiment of the present utility model Figure Two ;

[0023] Figure 2 A schematic diagram of the structure of a constant temperature controlled drying device provided in this embodiment of the utility model. Figure Two ;

[0024] Figure 3 A schematic diagram of the structure of a constant temperature controlled drying device provided in this embodiment of the utility model. Figure Three ;

[0025] Figure 4 A schematic diagram of the structure of a constant temperature controlled drying device provided in this embodiment of the utility model. Figure Four ;

[0026] Figure 5 A schematic diagram of the structure of a constant temperature controlled drying device provided in this embodiment of the utility model. Figure Five . Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the technical terms used in the description of the embodiments or the prior art will be briefly introduced below:

[0028] Biomass is organic matter that can release energy through combustion. Examples include crop straw left over after harvest, rice husks produced during grain processing, bagasse, sawdust from wood processing, livestock and poultry manure, and kitchen waste.

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0031] like Figure 1A As shown, Figure 1A A schematic diagram of a temperature-controlled drying device provided in this embodiment of the present invention is shown below. The temperature-controlled drying device includes:

[0032] Heating unit 101 is used to generate and transfer heat;

[0033] The feeding unit 102 is used to convey wet materials and control the feeding frequency of wet materials;

[0034] Drying unit 103 is used to dry wet materials;

[0035] A dust removal unit 104 is configured to collect dust by an air blower.

[0036] A discharging unit 105 is configured to collect the dried material.

[0037] The heating unit 101 is connected to the drying unit 103 through a pipeline, the feeding unit 102 is connected to the drying unit 103 through a feeding machine, a temperature sensor is arranged between the drying unit 103 and the dust removal unit 104, and the drying unit 103 is connected to the discharging unit 105 through a first belt conveyor.

[0038] The drying unit 103 is specifically configured to monitor the drying temperature of the wet material through the temperature sensor and send the drying temperature to at least one of the feeding unit 102, the heating unit 101 and the dust removal unit 104, so that the at least one unit is adjusted correspondingly to control the drying temperature to be within a preset temperature range.

[0039] The above constant temperature control drying equipment realizes constant temperature control, eliminates the problem that an operator needs to check temperature values in real time and manually adjust the feeding frequency, changes the current situation of low automation and digitization, stabilizes production, saves electricity fees, saves biomass feeding, optimizes production operators, shortens downtime and improves equipment utilization.

[0040] In some embodiments, the heating unit 101 provides the required heat energy for the drying process and is the energy source for the operation of the drying equipment. The burner inside the heating unit 101 generates a large amount of heat by burning biomass, so that the heating medium reaches a set high temperature. The heating unit 101 transmits the generated heat to the drying unit 103 through a pipeline.

[0041] In some embodiments, the heating unit 101 is specifically configured to adjust the heating power or the biomass quantity according to the drying temperature sent by the drying unit 103. The drying temperature is in a positive proportional relationship with the heating power or the biomass quantity. By monitoring the drying temperature of the wet material, the heating power or the biomass quantity is adjusted, so that the heat provided by the heating unit 101 and the heat required by the drying unit 103 reach a supply-demand balance.

[0042] In some embodiments, the feeding unit 102 is specifically configured to adjust the wet material feeding frequency according to the drying temperature sent by the drying unit 103. Optionally, when the drying temperature sent by the drying unit 103 is lower than the lower limit of the preset temperature range, the wet material feeding frequency is reduced; when the drying temperature sent by the drying unit 103 is within the preset temperature range, the wet material feeding frequency is maintained; and when the drying temperature sent by the drying unit 103 is higher than the upper limit of the preset temperature range, the wet material feeding frequency is increased. Different wet materials correspond to different preset temperature ranges, which are not specifically limited in the present application.

[0043] Specifically, if the temperature difference between a certain temperature and the lower limit of a preset temperature range is less than a first threshold and greater than or equal to a second threshold, and the second threshold is less than the first threshold, then the wet material feed frequency is reduced according to the frequency corresponding to the first threshold; if the temperature difference between a certain temperature and the lower limit of a preset temperature range is less than the second threshold and greater than or equal to a third threshold, and the third threshold is less than the second threshold, then the wet material feed frequency is reduced according to the frequency corresponding to the second threshold; if the temperature difference between a certain temperature and the lower limit of a preset temperature range is less than the third threshold, then the wet material feed frequency is reduced according to the frequency corresponding to the third threshold.

[0044] For example, suppose the preset temperature range is [88, 92], the first threshold is 0, the second threshold is -1, and the third threshold is -3; the frequency corresponding to the first threshold is -1 Hz, the frequency corresponding to the second threshold is -1.5 Hz, and the frequency corresponding to the third threshold is -2 Hz. Figure 1B As shown, assuming the drying temperature sent by the drying unit 103 is in the range [87, 88), and the temperature difference between it and the lower limit of the preset temperature range 88℃ is in the range [-1, 0), then the current wet material feeding frequency will be reduced by 1 Hz; assuming the drying temperature sent by the drying unit 103 is in the range [85, 87), and the temperature difference between it and the lower limit of the preset temperature range 88℃ is in the range [-3, -1), which is less than the second threshold -1, then the current wet material feeding frequency will be reduced by 1.5 Hz; assuming the drying temperature sent by the drying unit 103 is less than 85℃, and the temperature difference between it and the lower limit of the preset temperature range 88℃ is less than the third threshold -3, then the current wet material feeding frequency will be reduced by 2 Hz. This achieves control over the wet material feeding rate.

[0045] If the temperature difference between a given temperature and the upper limit of a preset temperature range is greater than a fourth threshold and less than or equal to a fifth threshold, and the fifth threshold is greater than the fourth threshold, then the wet material feeding frequency is increased according to the frequency corresponding to the fourth threshold; if the temperature difference between a given temperature and the upper limit of a preset temperature range is greater than a fifth threshold and less than or equal to a sixth threshold, and the sixth threshold is greater than the fifth threshold, then the wet material feeding frequency is increased according to the frequency corresponding to the fifth threshold; if the temperature difference between a given temperature and the upper limit of a preset temperature range is greater than the sixth threshold, then the wet material feeding frequency is increased according to the frequency corresponding to the sixth threshold.

[0046] For example, using the same preset temperature range as before, the fourth threshold is 0, the fifth threshold is 1, and the sixth threshold is 3; the frequency corresponding to the fourth threshold is +1Hz, the frequency corresponding to the fifth threshold is +1.5Hz, and the frequency corresponding to the sixth threshold is +2Hz. Figure 1CAs shown, assuming the drying temperature sent by the drying unit 103 is between (92, 93) and the temperature difference between it and the upper limit of the preset temperature range of 92℃ is between (0, 1), the current wet material feeding frequency is increased by 1 Hz; assuming the drying temperature sent by the drying unit 103 is between (93, 95) and the temperature difference between it and the upper limit of the preset temperature range of 92℃ is between (1, 3), the current wet material feeding frequency is increased by 1.5 Hz; assuming the drying temperature sent by the drying unit 103 is greater than 95 and the temperature difference between it and the upper limit of the preset temperature range of 92℃ is greater than 3, the current wet material feeding frequency is increased by 2 Hz. This achieves control over the wet material feeding rate.

[0047] The above embodiments monitor the drying temperature of the wet material and adjust the feed rate of the wet material so that the feed rate of the wet material matches the processing capacity of the drying unit 103.

[0048] In some embodiments, such as Figure 2 As shown, the feeding unit 102 also includes: a hopper for storing wet materials to be fed into the drying unit 103, a second belt conveyor for conveying wet materials to the feeder, and a weighing system frequency converter for controlling the feeding frequency of wet materials entering the feeder.

[0049] The feeding unit 102 is responsible for conveying the wet material to be dried from the storage area to the drying unit 103. A belt conveyor (referred to as the second belt conveyor for distinction) can be used to ensure that the material can enter the drying unit 103 stably and continuously. The feeding unit 102 precisely controls the amount of material entering the drying unit 103 through a frequency converter of the weighing system, ensuring the stability of the drying process and the consistency of product quality.

[0050] In some embodiments, the drying unit 103 is the core unit of the drying equipment, utilizing the heat provided by the heating unit 101 to dry the material. Through direct or indirect heating, the moisture in the material absorbs heat and rapidly vaporizes, achieving drying. For direct heating drying equipment, the hot flue gas output from the heating unit 101 directly enters the drying unit 103 and contacts the wet material; for indirect heating equipment, the heating unit 101 transfers heat to the heating element of the drying unit 103 via a medium such as steam or heat transfer oil, and the heating element then transfers the heat to the wet material. During the drying process, the wet material can fully contact the heating medium, while continuously agitating or remaining in a suspended state, increasing the contact area and contact time between the wet material and the heating medium, improving drying efficiency, and ensuring uniform drying of the material.

[0051] The drying unit 103 includes a temperature sensor that monitors the drying temperature of the wet material in real time. In some embodiments, such as... Figure 3As shown, the drying unit 103 further comprises a drying drum for stirring the wet material, a dryer for supplying heat to the drying drum, and a negative pressure sensor for monitoring pressure data in the drying drum and sending the pressure data to the heat supply unit 101 and / or the dust removal unit 104, so that the heat supply unit 101 and / or the dust removal unit 104 correspondingly adjust to control the pressure data to be within a preset pressure range. Correspondingly, the heat supply unit 101 is further configured to adjust the heating power or the biomass amount according to the pressure data sent by the drying unit 103, and the pressure data and the heating power or the biomass amount are in a positive proportional relationship.

[0052] In some embodiments, the dust removal unit 104 is specifically configured to adjust the air volume of the induced draft fan according to the drying temperature sent by the drying unit 103, and the drying temperature and the air volume of the induced draft fan are in a positive proportional relationship. By monitoring the drying temperature of the wet material and adjusting the air volume of the induced draft fan, the equipment can be operated under the most suitable temperature conditions, and a reasonable air volume can ensure that the heat is fully utilized, improve the energy utilization efficiency, and reduce the energy consumption per unit product.

[0053] In some embodiments, the dust removal unit 104 is further configured to adjust the air volume of the induced draft fan according to the pressure data sent by the drying unit 103, and the pressure data and the air volume of the induced draft fan are in a positive proportional relationship. By monitoring the pressure data and adjusting the air volume of the induced draft fan, the pressure inside the drying equipment can be maintained within a suitable range, and the drying process can be stabilized to avoid pressure fluctuations. A stable pressure environment helps to ensure the uniformity of heat transfer and moisture evaporation, creating good conditions for drying.

[0054] In some embodiments, the dust removal unit 104 collects and processes the dust in the hot gas stream discharged from the drying unit 103.

[0055] In some embodiments, the dust removal unit 104 is further configured to further purify the hot gas stream after collecting the dust to remove harmful gases and odors therein. By installing active carbon adsorption devices, wet scrubbers and other equipment, pollutants such as sulfur dioxide, nitrogen oxides and volatile organic compounds in the hot gas stream are adsorbed or neutralized, so that the purified gas meets the environmental emission standards.

[0056] In some embodiments, the discharging unit 105 is responsible for collecting the dried material after the drying unit 103, and conveying the dried material from the drying unit 103 to a designated storage or subsequent processing equipment. For example, Figure 4 As shown, the discharging unit 105 comprises a cyclone unloader for separating dust from the dried material, and a third belt conveyor for conveying the dried material to a storage device. A large amount of hot gas stream carrying dust is generated during the drying process, and the cyclone unloader separates the dust from the hot gas stream to prevent the dust from being discharged into the atmosphere and causing environmental pollution.

[0057] AsFigure 5 The utility model provides a constant temperature control drying equipment, the constant temperature control drying equipment includes:

[0058] The drying unit 103 monitors the drying temperature of the wet material through the temperature sensor. The drying unit 103 monitors the drying temperature of the wet material through the temperature sensor and sends it to at least one of the feeding unit 102, the heating unit 101 and the dust removal unit 104, so that at least one unit adjusts correspondingly to control the drying temperature within the preset temperature range.

[0059] Optionally, the heating unit 101 adjusts the heating power or the biomass quantity according to the drying temperature sent by the drying unit 103, wherein the drying temperature is in a positive proportional relationship with the heating power or the biomass quantity. The feeding unit 102 adjusts the wet material quantity frequency according to the drying temperature sent by the drying unit 103. When the drying temperature sent by the drying unit 103 is lower than the lower limit of the preset temperature range, the wet material quantity frequency is reduced. When the drying temperature sent by the drying unit 103 is higher than the upper limit of the preset temperature range, the wet material quantity frequency is increased. The dust removal unit 104 adjusts the air volume of the induced draft fan according to the drying temperature sent by the drying unit 103, wherein the drying temperature is in a positive proportional relationship with the air volume of the induced draft fan.

[0060] When the temperature is too high, the amount of wet material is appropriately increased, the excess heat is taken away by water evaporation, the ventilation volume is increased, the heat transfer and moisture discharge are accelerated, and the drying process is kept in a high-efficiency state. Detecting the temperature and adjusting the feeding and ventilation can make the temperature of each part in the equipment tend to be uniform, avoid local overheating or overcooling, make the material be heated uniformly in the whole drying process, and thus ensure the uniformity of the drying effect. Detecting the temperature and optimizing the feeding and ventilation can make the equipment operate under the most suitable temperature conditions, avoid energy waste caused by too high or too low temperature. Reasonable ventilation volume can ensure that the heat is fully utilized, improve the energy utilization efficiency, and reduce the energy consumption per unit product. Detecting the temperature and adjusting the feeding and ventilation can effectively control the equipment temperature, prevent local overheating from causing deformation, aging or even damage of the equipment, and prolong the maintenance cycle and service life of the equipment.

[0061] The drying unit 103 further comprises a negative pressure sensor for monitoring the pressure data in the drying drum and sending it to the heating unit 101 and / or the dust removal unit 104, so that the heating unit 101 and / or the dust removal unit 104 adjusts correspondingly to control the pressure data within the preset pressure range. Correspondingly, the heating unit 101 adjusts the heating power or the biomass quantity according to the pressure data sent by the drying unit 103, wherein the pressure data is in a positive proportional relationship with the heating power or the biomass quantity. The dust removal unit 104 adjusts the air volume of the induced draft fan according to the pressure data sent by the drying unit 103, wherein the pressure data is in a positive proportional relationship with the air volume of the induced draft fan.

[0062] By detecting the pressure and adjusting the feed amount and ventilation amount accordingly, the pressure inside the drying equipment can be maintained within a suitable range, avoiding unstable drying process caused by pressure fluctuations. Stable pressure environment helps to ensure uniformity of heat transfer and moisture evaporation, creating favorable conditions for drying. When the pressure inside the equipment rises, it may mean that the material is too much or the ventilation is not smooth, at this time, reducing the feed amount and increasing the ventilation amount can make the drying process more smooth, speed up the moisture evaporation and heat transfer, and improve the drying efficiency. Conversely, when the pressure decreases, appropriately increasing the feed amount or adjusting the ventilation amount can also optimize the drying effect. Adjusting the feed amount of combustible biomass according to pressure feedback can make the ratio of combustible biomass providing heat to wet material optimal, ensuring that energy is fully used for material drying and avoiding energy waste caused by too much or too little fuel. At the same time, optimizing the ventilation amount can also help to improve the utilization efficiency of heat and reduce heat loss. By detecting the pressure and adjusting the feed and ventilation in a timely manner, the equipment can be effectively prevented from running at an overpressure, protecting the safety and stability of the equipment and prolonging the service life of the equipment.

[0063] In summary, the above-mentioned constant temperature control drying equipment can realize automatic control of constant temperature and constant pressure without human intervention, reduce labor cost, and improve the automation degree of the constant temperature control drying equipment. The equipment can run under the most suitable temperature and pressure conditions, keeping the drying process in an efficient state, ensuring that energy is fully used for material drying, avoiding unnecessary energy waste, and improving energy utilization efficiency; the material can be heated uniformly throughout the drying process, thereby ensuring the uniformity of the drying effect.

[0064] Those skilled in the art can understand that, Figures 1A-5 The skilled in the art can understand that,

[0065] It should be noted that, in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0066] The above merely provides a specific implementation of the present application, and enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Accordingly, the present application is not to be limited to these embodiments disclosed herein, but is to accord with the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A constant temperature controlled drying device, characterized in that, include: Heating units for generating and transferring heat, feeding units for conveying wet materials and controlling the frequency of wet material feeding, drying units for drying wet materials, dust removal units for collecting dust by induced draft fans, and discharging units for collecting dried materials. The heating unit and the drying unit are connected by a pipeline, the feeding unit and the drying unit are connected by a feeder, a temperature sensor is installed between the drying unit and the dust removal unit, and the drying unit and the discharging unit are connected by a first belt conveyor. The drying unit is used to monitor the drying temperature of the wet material through the temperature sensor and send the data to at least one of the feeding unit, the heating unit, and the dust removal unit, so that the at least one unit can make corresponding adjustments to control the drying temperature within a preset temperature range.

2. The constant temperature controlled drying equipment according to claim 1, characterized in that, The feeding unit is specifically used for: When the drying temperature sent by the drying unit is lower than the lower limit of the preset temperature range, the frequency of feeding the wet material is reduced. When the drying temperature sent by the drying unit is within the preset temperature range, the feeding frequency of the wet material is maintained; When the drying temperature sent by the drying unit is higher than the upper limit of the preset temperature range, the feeding frequency of the wet material is increased.

3. The constant temperature controlled drying equipment according to claim 1, characterized in that, The heating unit is specifically used to adjust the heating power or biomass feed rate according to the drying temperature sent by the drying unit; the drying temperature is directly proportional to the heating power or the biomass feed rate.

4. The constant temperature controlled drying equipment according to claim 1, characterized in that, The dust removal unit is specifically used to adjust the air volume of the induced draft fan according to the drying temperature sent by the drying unit; the drying temperature is directly proportional to the air volume of the induced draft fan.

5. The constant temperature controlled drying equipment according to claim 1, characterized in that, The drying unit further includes: Drying drum is used to agitate wet materials; A dryer for supplying heat to the drying drum; A negative pressure sensor is used to monitor the pressure data inside the drying drum and send it to the heating unit and / or the dust removal unit so that the heating unit and / or the dust removal unit can make corresponding adjustments to control the pressure data within a preset pressure range.

6. The constant temperature controlled drying equipment according to claim 5, characterized in that, The feeding unit is also used to adjust the heating power or biomass feed rate according to the pressure data sent by the drying unit; the pressure data is directly proportional to the heating power or the biomass feed rate.

7. The constant temperature controlled drying equipment according to claim 5, characterized in that, The dust removal unit is also used to adjust the air volume of the induced draft fan according to the pressure data sent by the drying unit; the pressure data is directly proportional to the air volume of the induced draft fan.

8. The constant temperature controlled drying equipment according to claim 1, characterized in that, The feeding unit further includes: The hopper is used to store wet materials that are to be fed into the drying unit. The second belt conveyor is used to transport wet materials to the feeder; The frequency converter of the weighing system is used to control the frequency of the wet material entering the feeder.

9. The constant temperature controlled drying equipment according to claim 1, characterized in that, The discharge unit includes: Cyclone feeders are used to separate dust from dried materials; The third belt conveyor is used to transport dried materials to storage equipment.

10. The constant temperature controlled drying equipment according to claim 1, characterized in that, The dust removal unit is also used to purify the hot airflow output from the drying unit.

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