WO2017173802A1 - 一种干燥机余热回收利用系统及方法 - Google Patents

一种干燥机余热回收利用系统及方法 Download PDF

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Publication number
WO2017173802A1
WO2017173802A1 PCT/CN2016/102361 CN2016102361W WO2017173802A1 WO 2017173802 A1 WO2017173802 A1 WO 2017173802A1 CN 2016102361 W CN2016102361 W CN 2016102361W WO 2017173802 A1 WO2017173802 A1 WO 2017173802A1
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WO
WIPO (PCT)
Prior art keywords
water
exhaust gas
waste heat
dryer
storage tank
Prior art date
Application number
PCT/CN2016/102361
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English (en)
French (fr)
Inventor
张羽飞
徐涛
徐伟
王明达
刘一成
Original Assignee
北新集团建材股份有限公司
故城北新建材有限公司
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Application filed by 北新集团建材股份有限公司, 故城北新建材有限公司 filed Critical 北新集团建材股份有限公司
Priority to RU2018133231A priority Critical patent/RU2704383C1/ru
Publication of WO2017173802A1 publication Critical patent/WO2017173802A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
    • F28C1/02—Direct-contact trickle coolers, e.g. cooling towers with counter-current only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to the technical field of drying equipment, in particular to the technical field of waste heat recovery and utilization of a dryer.
  • the drying process of gypsum board requires a lot of heat, and in winter, the weather is cold and the temperature is low, so the production energy consumption is high, resulting in a low production speed of the production line. In the cold environment, the temperature of the slurry is low, resulting in a lower temperature of the formed gypsum board.
  • a large temperature difference is generated, which causes the surface of the gypsum board to rapidly condense a layer of liquefied water, thereby being on the gypsum board. Paper surface will produce "watermark” and "pit pit” and other phenomena, which will seriously affect the appearance quality of the product and even affect the strength of the gypsum board.
  • an object of the present invention is to provide a dryer waste heat recovery utilization system and method that solves the above problems.
  • the invention provides a dryer waste heat recovery utilization system, wherein the dryer waste heat recovery utilization system comprises an exhaust gas exhaust pipe, a water storage tank, a drain pipe, a sprinkler device, a swirl plate, a wire mesh defogger, a water supply device, and a hot water utilization device, wherein a bottom end of the exhaust gas discharge chimney is in communication with a top end of the water storage tank through the drain pipe, the shower device, the swirl plate, and the wire mesh mist eliminator All disposed inside the exhaust gas exhaust pipe, and the shower device is in communication with the water replenishing device; and wherein the water replenishing device comprises a cold water pump, a water supply pipe and a cold water valve, wherein the water supply pipe is One end is in communication with the cold water pump through the cold water valve, and the second end of the water supply pipe is in communication with the shower device; and wherein the hot water utilization device comprises a hot water pipe, a hot water pump and heat a water valve, the hot water pipe is in communication with the hot water pump through the hot water valve
  • the dryer waste heat recovery and utilization system further includes a preheater, an exhaust fan, and a supplemental fan, wherein the first end of the preheater is in communication with the exhaust gas exhaust pipe, and the first of the preheater The bottom of the end is in communication with the supplemental fan, and the second end of the preheater is in communication with the exhaust fan.
  • the dryer waste heat recovery utilization system further comprises a baffle plate, the baffle plate being located in the exhaust gas exhaust pipe, disposed opposite to the exhaust gas inlet of the exhaust gas discharge chimney, and the cylinder of the exhaust gas discharge chimney The wall is set at a second predetermined angle ⁇ .
  • the dryer waste heat recovery system further includes a first liquid level gauge, a second liquid level gauge, a thermometer, and an alarm, wherein the first liquid level gauge is located at an intermediate portion of the water storage tank, a second level gauge is located above the first level gauge, the thermometer is located below the first level gauge, and the first level gauge and the second level gauge are both associated with the alarm Electrical connection.
  • the spraying device is located above the exhaust gas inlet of the exhaust gas exhausting chimney, the swirling plate is located above the spraying device and is located below the wire mesh mist eliminator; wherein the spraying device
  • the shower device comprises N spray coils and a plurality of nozzles, N is a positive integer greater than or equal to 1, N of the spray coils are sequentially disposed in the exhaust gas exhaust pipe, and N the spray coils One or more of the nozzles are disposed on each of the shower coils; and wherein the water replenishing device includes N of the water supply pipes and N of the cold water valves, wherein the N of the hydrating waters
  • the first end of the tube and the N cold water valves are in one-to-one correspondence with the cold water pump, and the second ends of the N water supply pipes are respectively in one-to-one correspondence with the N shower coils.
  • the blades of the swirling plate are made of stainless steel, the thickness of the blades is 4 mm to 5 mm, and the inclination angle of the blades is 5 to 8 degrees.
  • the present invention also provides a dryer waste heat recovery utilization method using the dryer waste heat recovery utilization system as described above, the dryer waste heat recovery utilization method comprising:
  • the steam in the exhaust gas is vaporized into hot water to be recovered into the water storage tank by the dryer waste heat recovery and utilization system;
  • the water level of the water storage tank is measured in real time, and the opening degree of the cold water valve is controlled according to the water level of the water storage tank, so that the water level in the water storage tank is maintained within a preset water level interval.
  • controlling the opening degree of the hot water valve according to the internal temperature of the pulp can and the internal temperature of the blowing agent clear water tank comprises: when the internal temperature of the pulp can and the foaming agent clear water tank Decreasing the opening degree of the hot water valve when the internal temperature is higher than the maximum value of the predetermined temperature; when the internal temperature of the pulp can and the internal temperature of the blowing agent clear water tank are low The opening degree of the hot water valve is increased at a minimum value of the predetermined temperature.
  • the opening degrees of the plurality of the cold water valves corresponding to the plurality of the shower coils are sequentially increased.
  • the method further includes:
  • the system and method for waste heat recovery and utilization of the dryer converts water in the exhaust gas of the dryer into hot water for recycling and utilization into the batching system, thereby realizing recycling of waste water, saving energy and water resources, and improving
  • the temperature of the slurry is beneficial to the smooth progress of the drying process of the gypsum board, and reduces the energy consumption in the drying process, is beneficial to the production, and effectively reduces the production cost.
  • the invention improves the stability and safety of the connection between the roof truss and the indoor frame on the basis of using fewer connecting members, and saves steel and is convenient to install.
  • Figure 1 is a schematic view showing the structure of a waste heat recovery and utilization system of a dryer.
  • the invention provides a system and a method for recovering and utilizing a waste heat of a dryer, which is supplemented by a hot air heated by a preheater to a dryer through a supplemental fan; and a sprinkler device and a swirling flow are arranged in the exhaust gas exhaust pipe;
  • the plate and the wire mesh defogger multi-channel moisture collecting device fully collects the water in the exhaust gas to form hot water, and transports it to the batching system for utilization. It not only saves water resources, but also effectively raises the temperature of the slurry, reduces the unqualified rate of the product, and fully utilizes the heat energy in the exhaust gas to save energy and reduce production costs.
  • the dryer waste heat recovery utilization system 100 includes an exhaust gas exhaust pipe 11 , a water storage tank 12 , a drain pipe 13 , a shower device 14 , a swirl plate 15 , a wire mesh defogger 16 , a water supply device 17 , and Hot water utilization device 18.
  • the bottom end of the exhaust gas discharge chimney 11 communicates with the top end of the water storage tank 12 through the drain pipe 13, and the hot water collected from the exhaust gas flows into the water storage tank 12 via the drain pipe 13 for storage and reuse; the shower device 14
  • the swirling plate 15 and the wire mesh demister 16 are both disposed inside the exhaust gas exhaust pipe 11 for sufficiently cooling and liquefying the water vapor in the exhaust gas to form hot water to be recovered.
  • the shower device 14 is in communication with the water supply device 17, and the water supply device 17 supplies cold water supply to the shower device 14.
  • the shower device 14 sprays cold water into the exhaust gas, and the dryer gas having a higher temperature meets the cold water in the process of traveling upward, and performs a round of condensing and liquefaction, and part of the water vapor in the exhaust gas is liquefied into heat.
  • the sprayed cold water is also heated by the high-temperature exhaust gas, flows into the bottom of the exhaust gas discharge chimney 11 together with the liquefied hot water for recovery, and flows into the water storage tank 12 along the drain pipe 13.
  • the water vapor in the exhaust gas is condensed and recovered, but also the waste heat in the exhaust gas can be fully utilized to save energy.
  • the water supply device 17 includes a cold water pump 170, a water supply pipe 171, and a cold water valve 172, wherein the first end of the water supply pipe 171 communicates with the cold water pump 170 through the cold water valve 172, and the second end of the water supply pipe 171 and the shower device
  • the 14-phase communication is performed, and the flow rate of the water supplied from the water supply device 17 to the shower device 14 by adjusting the opening degree of the cold water valve 172, that is, the spray cold water flow rate of the shower device 14 can be adjusted.
  • the exhaust gas encounters the swirling plate 15 in the process of continuing to rise, and the exhaust gas is blown toward the exhaust wall 11a of the exhaust gas exhaust pipe 11 by the rotary motion of the swirling plate 15 and the centrifugal force generated thereof, and a part of the water vapor in the exhaust gas is in the process. It is liquefied and slides along the tube wall 11a to the bottom, and flows into the water storage tank 12 through the drain pipe 13.
  • the water vapor in the exhaust gas can be sufficiently recovered into the water storage tank 12 to be utilized.
  • the hot water in the water storage tank 12 is discharged to the batching system of the gypsum board production line through the hot water utilization device 18, which not only saves water resources, but also provides the temperature of the slurry, facilitates the smooth progress of the drying process of the formed gypsum board, and saves Energy consumption, effectively reducing production costs.
  • the hot water utilization device 18 includes a hot water pipe 180, a hot water pump 181, and a hot water valve 182.
  • the hot water pipe 180 communicates with the hot water pump 181 through the hot water valve 182; the bottom end of the water storage tank 12 and the hot water pump 181
  • the hot water pipe 180 is also in communication with the dosing system, for example, in communication with the pulp tank and the blowing agent fresh water tank, and the temperature of the slurry in the batching system can be controlled by adjusting the opening of the hot water valve 182.
  • the conventional dryer exhaust gas exhaust pipe does not have any recovery device, so the diameter is about 1000 mm, but in the dryer waste heat recovery and utilization system 100 of the present invention, in order to facilitate the installation and use of the water vapor recovery device, The diameter of the exhaust gas exhaust pipe 11 is increased to about 2000 mm.
  • the exhaust gas discharge chimney 11 may be disposed vertically or obliquely; however, the bottom portion 11b of the exhaust gas discharge chimney 11 is required to be disposed at a first predetermined angle ⁇ with the horizontal plane to facilitate the recovery of the condensed hot water and the spray water.
  • the first preset angle ⁇ is 3° to 10°
  • the recovery effect of the condensed water and the spray water is good. And does not affect the installation stability of the exhaust gas exhaust pipe 11.
  • the first preset angle ⁇ may be selected to be set to 3°, 5°, 8°, or the like.
  • the dryer waste heat recovery system 100 further includes a preheater 20, an exhaust fan 21, and a supplemental fan 22, wherein the first end 201 of the preheater 20 is in communication with the exhaust gas exhaust pipe 11, the preheater 20 The bottom of the first end 201 is in communication with the supplemental fan 22, the second end 202 of the preheater 20 is in communication with the exhaust fan 21, and the bottom of the second end 202 of the preheater 20 is passed through the conduit 30 and the dryer (not shown) Shown) connected.
  • the exhaust fan 21 draws the exhaust gas in the dryer into the preheater 20 through the pipe 30, and the blower 22 draws clean air into the preheater 20 for preheating, and then enters the dryer through the pipe 30 for heat energy. supply.
  • part of the exhaust gas is brought back to the dryer for heat supply, and the heat energy in the exhaust gas is reused.
  • the dryer waste heat recovery and utilization system 100 further includes a baffle 19 which is disposed in the exhaust gas discharge chimney 11 and disposed with respect to the exhaust gas inlet 110 of the exhaust gas discharge chimney 11 and with the exhaust gas discharge chimney 11
  • the cylinder wall 11a is disposed at a second predetermined angle ⁇ .
  • the function of the baffle 19 is to guide the exhaust gas to be smoothly discharged upward along the exhaust gas discharge chimney 11 to prevent a large amount of exhaust gas from escaping at the bottom of the exhaust gas exhaust pipe 11 after passing through the exhaust gas inlet 110.
  • the second predetermined angle ⁇ is 30° to 60°, the guiding action of the baffle 19 is large, and the exhaust gas is discharged smoothly.
  • the second preset angle ⁇ can be selected to be set to 36°, 45°, 56°. Wait.
  • the dryer waste heat recovery system 100 further includes a first level gauge 121, a second level gauge 122, a thermometer 123, and an alarm (not shown).
  • the first liquid level gauge 121 is located at an intermediate portion of the water storage tank 12
  • the second liquid level gauge 122 is located above the first liquid level gauge 121
  • the thermometer 123 is located below the first liquid level gauge 121
  • the first liquid level gauge Both 121 and the second level gauge 122 are electrically coupled to the alarm.
  • the first level gauge 121 and the second level gauge 122 are arranged to ensure that the amount of hot water in the water storage tank 12 is located between the first level gauge 121 and the second level gauge 122 to avoid the water storage tank.
  • the first liquid level gauge 121 triggers the alarm to perform a low water level alarm, and the worker can quickly increase the recovery to the storage by adjusting the opening degree of the cold water valve 172.
  • the opening degree of the cold water valve 172 reduces the amount of hot water recovered into the water storage tank 12, and at the same time, the hot water utilization device 18 can discharge the hot water in the water storage tank 12 into the batching system, thereby effectively reducing the water storage tank.
  • the thermometer 123 is used to measure the temperature of the hot water in the water storage tank 12 in real time. In order to prevent the temperature measurement of the thermometer 123 from being exposed to the hot water surface, the thermometer 123 is disposed below the first liquid level meter 121.
  • the positions of the shower device 14, the swirl plate 15, and the screen demister 16 can be set and changed according to actual conditions.
  • the shower device 14 is located above the exhaust gas inlet 110 of the exhaust gas discharge chimney 11 such that the exhaust gas entering the exhaust gas discharge chimney 11 is sufficiently sprayed by the cold water;
  • the swirl plate 15 is located above the shower device 14, In order to prevent the swirling plate 15 from being sprayed by cold water, the water vapor collecting effect is affected; since the recovery process of the swirling plate 15 causes the exhaust gas to generate a swirling action during the ascending process, which is advantageous for the operation of the screen demister 16 , the swirling plate 15 is located below the wire mesh defogger 16.
  • the shower device 14 may include N shower coils 140 and a plurality of nozzles 141, wherein N is a positive integer greater than or equal to 1, and N shower coils 140 are sequentially disposed in the exhaust gas exhaust pipe 11, and One or more nozzles 141 are disposed on each of the N shower coils 140.
  • the N spray coils 140 are arranged in parallel, parallel to each other, and perpendicular to the cylinder wall 11a, that is, perpendicular to the discharge direction of the exhaust gas, to achieve multiple spraying of the exhaust gas, and to maximize the recovery of water vapor in the exhaust gas.
  • the N spray coils 140 may be disposed at an angle to each other as long as the cold water sprayed by the N spray coils 140 can completely cover the horizontal direction of the exhaust gas discharge chimney 11 in a plane above the exhaust gas inlet 110.
  • the cross section is OK.
  • a plurality of nozzles 141 are disposed on each of the spray coils 140 to ensure that each of the spray coils 140 can spray the exhaust gas to the maximum extent in the cross section of the exhaust gas exhaust pipe 11 to ensure that the exhaust gas is in the exhaust gas. The water vapor is fully recovered.
  • the water supply device 17 includes N water supply pipes 171 and N cold water valves 172, wherein the first ends of the N water supply pipes 171 and the N cold water valves 172 are in one-to-one correspondence with the cold water pump 170, and the N water supply pipes The second ends of the tubes 171 are respectively in one-to-one correspondence with the N shower coils 140 to ensure that each of the spray coils 140 is correspondingly provided with a cold water valve to facilitate independent control of the cold water spray amount.
  • the shower device 14 includes three spray coils 140, three spray coils 140 being disposed in order from low to high above the exhaust gas inlet 110;
  • the water supply device 17 includes three water supply pipes 171 and three cold water valves 172.
  • the spray coil pipe 140, the water supply pipe 171 and the cold water valve 172 are in one-to-one correspondence, and each spray pipe 140 can be controlled according to actual use conditions.
  • the cold water flow is not limited to any one-to-one correspondence, and each spray pipe 140 can be controlled according to actual use conditions. The cold water flow.
  • the cold water temperature in the winter water supply pipe 171 is 5 ° C
  • the cold water valve 172 corresponding to the lower spray pipe 140 is fully open
  • the opening of the cold water valve 172 corresponding to the intermediate spray coil 140 is 1/2
  • the opening of the cold water valve 172 corresponding to the upper spray coil 140 may be 1/3, so that water is collected
  • the temperature is 55 ° C
  • the hot water valve 182 is fully open to ensure that the water level in the water storage tank 12 is between the first liquid level gauge 121 and the second liquid level gauge 122, while meeting the water quantity and temperature requirements of the batching system;
  • the opening degree of the hot water valve 182 is adjusted, and the water level in the water storage tank 12 starts to rise. Therefore, the opening degrees of the three cold water valves 172 can be appropriately adjusted to keep the water level unchanged, for example, The opening of the cold water valve 172 corresponding to the small upper or middle spray coil 140.
  • the blade 151 of the swirling plate 15 is made of stainless steel, and the thickness of the blade 151 is 4 mm to 5 mm, which can effectively ensure the service life of the swirling plate 15; the inclination angle of the blade 151 is 5 to 8 degrees, which is sufficient to fully recover the exhaust gas. Water vapor in the water.
  • the preheater 20 is connected to the dryer through the preheater 20, and a part of the heat in the exhaust gas can be recovered for use; and the plurality of shower coils 140 in the shower device 14 are passed. Performing multiple sprays to cool down, recovering most of the water vapor in the exhaust gas, fully reusing the heat in the exhaust gas to heat the spray cold water, and recycling it to the batching system; also setting the swirl plate 15 and the screen to remove The mister 16 further recovers residual water vapor in the exhaust gas.
  • the dryer waste heat recovery and utilization system 100 can completely recover and reuse the waste heat and water vapor in the dryer exhaust gas, fully save energy and reduce consumption, save water resources, improve product qualification rate, and effectively reduce production cost.
  • the present invention also provides a dryer waste heat recovery utilization method using the dryer waste heat recovery utilization system 100 provided according to the present invention, the method comprising: discharging the output end of the hot water pipe 180 and the pulping tank of the batching system and foaming
  • the fresh water tank is connected to each other; the water in the exhaust gas is vaporized into hot water to be recovered into the water storage tank 12 by the dryer waste heat recovery and utilization system 100; the internal temperature of the pulp tank and the internal temperature of the foaming agent water tank are measured in real time, and
  • the opening degree of the hot water valve 182 is controlled according to the internal temperature of the pulp tank and the internal temperature of the foaming agent water tank, so that the internal temperature of the pulp tank and the internal temperature of the foaming agent clear water tank satisfy the production requirements; the water storage tank 12 is measured in real time.
  • the water level controls the opening of the cold water valve 172 according to the water level of the water storage tank 12, so that the water level in the water storage tank 12 is maintained within the preset water level interval.
  • controlling the opening degree of the hot water valve 182 according to the internal temperature of the pulp tank and the internal temperature of the blowing agent water tank includes: when the internal temperature of the pulp tank and the internal temperature of the blowing agent water tank are higher than a predetermined temperature At the same time, the opening degree of the hot water valve 182 is reduced, the hot water supply is reduced to lower the slurry temperature; or the opening degree of the cold water valve 172 can be increased, and the temperature of the hot water recovered in the water storage tank 12 can be lowered to lower the material. Slurry temperature to meet production needs.
  • the slurry temperature can be directly increased by increasing the opening degree of the hot water valve 182; or by reducing the cold water
  • the opening degree of the valve 172 increases the temperature of the recovered hot water, thereby achieving the purpose of raising the temperature of the slurry.
  • the fixed position of the shower coil 140 in the exhaust gas discharge chimney 11 is in descending order.
  • the opening degrees of the plurality of cold water valves 172 corresponding to the plurality of shower coils 140 are sequentially increased. That is, the opening degree of the cold water valve 172 corresponding to the bottom end of the shower coil 140 is greater than the opening degree of the cold water valve 172 corresponding to the top end of the shower coil 140.
  • the bottom end of the shower coil 140 corresponds to
  • the cold water valve 172 is in a fully open state, and the purpose is to recover as much water vapor as possible from the bottom, and reduce the upper spray coil 140. At the same time as the working pressure, it is ensured that the water vapor in the exhaust gas can be recovered to the maximum.
  • the method for recovering and utilizing the waste heat of the dryer further comprises: measuring the value of the first liquid level gauge 121 in the water storage tank 12 in real time, and determining that the water level in the water storage tank 12 is lower than the first liquid according to the value of the first liquid level gauge 121
  • the position gauge 121 is located, the low water level alarm signal of the water storage tank 12 is issued through the alarm device to avoid the influence of the hot water in the water storage tank 12 on the batching system, resulting in product scrapping and affecting the production process. It also causes unnecessary waste of production costs.
  • the value of the second liquid level gauge 122 in the water storage tank 12 is measured in real time, and when the water level in the water storage tank 12 is higher than the position of the second liquid level gauge 122 according to the value of the second liquid level gauge 122, the alarm is issued through an alarm.
  • the high water level alarm signal of the water storage tank 12 prevents the hot water in the water storage tank 12 from overflowing, so that the recovered hot water is discharged in the exhaust gas exhaust pipe 11 and affects the circulation and discharge of the exhaust gas, even overflowing.
  • the specific dimensional values of the members listed in the present invention are exemplary values, and the dimensional parameters of the different members may be different in actual engineering depending on the building construction requirements.
  • the invention replenishes the hot air heated by the preheater into the dryer by using a supplemental fan; and disassembles the exhaust gas by providing a multi-channel water collecting device of a sprinkling device, a swirling plate and a wire mesh defogger in the exhaust gas exhausting chimney;
  • the water in the form of hot water is fully recovered and transported to the batching system to achieve recycling of the wastewater. It not only saves water resources, but also effectively raises the temperature of the slurry, reduces the rate of product failure, and fully utilizes the heat energy in the exhaust gas to save energy and effectively reduce production costs.

Abstract

提供一种干燥机余热回收利用系统（100）及方法。干燥机余热回收利用系统包括废气排放烟筒（11）、储水罐（12）、泄水管（13）、喷淋装置（14）、旋流板（15）、丝网除雾器（16）、补水装置（17）以及热水利用装置（18）。干燥机余热回收利用系统（100）及方法，将干燥机废气中的水蒸汽化为热水进行回收利用到配料系统中，实现废水的再生利用，在节约能源和水资源的同时，能够提高料浆的温度，有利于石膏板的干燥过程的顺利进行，并减少干燥过程中的能耗，有益于生产，能有效降低生产成本。

Description

一种干燥机余热回收利用系统及方法
本申请要求在2016年04月06日提交中国专利局、申请号为201610210431.X、发明名称为“一种干燥机余热回收利用系统及方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及干燥设备技术领域，尤其涉及干燥机的余热回收利用技术领域。
背景技术
石膏板的干燥过程需要消耗很大的热量，而在冬季天气寒冷、气温较低，因而生产能耗较高，导致生产线生产速度较低。在寒冷环境下料浆的温度偏低，导致成型的石膏板温度也较低，在进入干燥机时会产生较大的温差，导致石膏板表面迅速凝结一层液化水，从而在石膏板的上纸面会产生“水印”“麻坑”等现象，严重影响产品的外观质量，甚至会影响石膏板的强度；而由于板材的温度较低，在干燥机内蒸发等量的水就需要较高的热量，导致耗能偏高，生产成本剧增；同时，干燥后的干燥机废气中水蒸汽的含量大幅度升高，而废气中大量水蒸汽的外排属于能源的一大浪费，也不利于水资源的节约利用。
发明内容
针对上述问题，本发明的目的是提供一种解决以上问题的干燥机余热回收利用系统及方法。
本发明提供了一种干燥机余热回收利用系统，所述干燥机余热回收利用系统包括废气排放烟筒、储水罐、泄水管、喷淋装置、旋流板、丝网除雾器、补水装置以及热水利用装置，其中，所述废气排放烟筒的底端与所述储水罐的顶端通过所述泄水管相连通，所述喷淋装置、所述旋流板和所述丝网除雾器均设置在所述废气排放烟筒的内部，且所述喷淋装置与所述补水装置相连通；并且其中，所述补水装置包括冷水泵、补水管和冷水阀，其中，所述补水管的第一端通过所述冷水阀与所述冷水泵相连通，所述补水管的第二端与所述喷淋装置相连通；并且其中，所述热水利用装置包括热水管、热水泵和热水阀，所述热水管通过所述热水阀与所述热水泵相连通，所述储水罐的底端与所述热水泵相连通；并且其中，所述废气排放烟筒垂直设置，且所述废气排放烟筒的底部与水平面呈第一预设角度α设置。
其中，所述干燥机余热回收利用系统还包括预热器、废气风机和补风机，其中，所述预热器的第一端与所述废气排放烟筒相连通，所述预热器的第一端的底部与所述补风机相连通，所述预热器的第二端与所述废气风机相连通。
其中，所述干燥机余热回收利用系统还包括折流板，所述折流板位于所述废气排放烟筒内，相对于所述废气排放烟筒的废气入口设置，且与所述废气排放烟筒的筒壁呈第二预设角度β设置。
其中，所述干燥机余热回收利用系统还包括第一液位计、第二液位计、温度计和报警器，其中，所述第一液位计位于所述储水罐的中间部位，所述第二液位计位于所述第一液位计的上方，所述温度计位于所述第一液位计的下方，所述第一液位计和所述第二液位计均与所述报警器电连接。
其中，所述喷淋装置位于所述废气排放烟筒的废气入口的上方，所述旋流板位于所述喷淋装置的上方，且位于所述丝网除雾器的下方；其中，所述喷淋装置包括N个喷淋盘管和多个喷嘴，N为大于等于1的正整数，N个所述喷淋盘管依次设置在所述废气排放烟筒内，且N个所述喷淋盘管中每个所述喷淋盘管上均设置有一个或者多个所述喷嘴；并且其中，所述补水装置包括N条所述补水管和N个所述冷水阀，其中，N条所述补水管的第一端和N个所述冷水阀一一对应与所述冷水泵相连通，N条所述补水管的第二端分别与N个所述喷淋盘管一一对应相连通。
其中，所述旋流板的叶片为不锈钢材质，所述叶片的厚度为4mm～5mm，所述叶片的倾斜角度为5°～8°。
本发明还提供了一种使用如以上内容所述的干燥机余热回收利用系统的干燥机余热回收利用方法，所述干燥机余热回收利用方法包括：
将所述热水管的输出端与纸浆罐和发泡剂清水罐相连通；
通过所述干燥机余热回收利用系统将废气中的水蒸汽化为热水回收至所述储水罐内；
实时测量所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度，并根据所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度控制所述热水阀的开度，使所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度满足生产要求；
实时测量所述储水罐的水位，并根据所述储水罐的水位控制所述冷水阀的开度，使所述储水罐内的水位保持在预设水位区间内。
其中，所述根据所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度控制所述热水阀的开度包括：当所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度高于预定温度的最大值时，减小所述热水阀的开度；当所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度低 于预定温度的最小值时，增大所述热水阀的开度。
其中，所述喷淋装置的喷淋盘管的个数以及所述冷水阀的个数为多个时，按照所述喷淋盘管在所述废气排放烟筒内的固定位置从高到低的顺序，多个所述喷淋盘管所对应的多个所述冷水阀的开度依次增加。
其中，所述方法还包括：
实时测量所述储水罐内所述第一液位计的值，根据所述第一液位计的值判定所述储水罐内的水位低于所述第一液位计所在的位置时，通过所述报警器发出储水罐低水位报警信号；
实时测量所述储水罐内所述第二液位计的值，根据所述第二液位计的值判定所述储水罐内的水位高于所述第二液位计所在的位置时，通过所述报警器发出储水罐高水位报警信号。
本发明所提供的干燥机余热回收利用系统及方法，将干燥机废气中的水蒸汽化为热水进行回收利用到配料系统中，实现废水的再生利用，节约能源和水资源的同时，能够提高料浆的温度，有利于石膏板的干燥过程的顺利进行，并减少干燥过程中的能耗，有益于生产，有效降低生产成本。
本发明在使用较少连接件的基础上提高了屋架与屋内框架的连接的稳定性和安全性，并且节省用钢、安装方便。
附图说明
并入到说明书中并且构成说明书的一部分的附图示出了本发明的实施例，并且与描述一起用于解释本发明的原理。在这些附图中，类似的附图标记用于表示类似的要素。下面描述中的附图是本发明的一些实施例，而不是全部实施例。对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，可以根据这些附图获得其他的附图。
图1是干燥机余热回收利用系统的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
为解决石膏板生产过程、尤其是干燥机干燥过程的耗能大、效率低、产品质量不过关的 问题，本发明提供了一种干燥机余热回收利用系统及方法，通过补风机将经由预热器加热后的热风补充到干燥机中加以利用；通过在废气排放烟筒内设置喷淋装置、旋流板和丝网除雾器多道水分收集装置，将废气中的水分形成热水充分回收，并输送到配料系统中进行利用。不仅能够节约水资源，还有效提高了料浆的温度，降低产品的不合格率，将废气中的热能也充分利用，节约耗能，降低生产成本。
下面结合附图，对根据本发明所提供的干燥机余热回收利用系统及方法进行详细描述。
图1示出了本发明所提供的干燥机余热回收利用系统的一种实施例的结构示意图。参照图1所示，该干燥机余热回收利用系统100包括废气排放烟筒11、储水罐12、泄水管13、喷淋装置14、旋流板15、丝网除雾器16、补水装置17以及热水利用装置18。其中，废气排放烟筒11的底端与储水罐12的顶端通过泄水管13相连通，从废气中收集的热水经由泄水管13流入储水罐12内进行存储和再利用；喷淋装置14、旋流板15和丝网除雾器16均设置在废气排放烟筒11的内部，用以将废气中的水蒸汽充分冷却液化，形成热水被回收。
其中，喷淋装置14与补水装置17相连通，补水装置17向喷淋装置14提供冷水供给。在废气排放烟筒11内，喷淋装置14向废气中喷淋冷水，温度较高的干燥机废气向上行进的过程中与冷水相遇，进行一轮冷凝液化，废气中的部分水蒸汽被液化成热水；同时，喷淋的冷水也被高温废气加热，与液化的热水一起流入废气排放烟筒11的底部进行回收，沿泄水管13流入储水罐12中。在此过程中，不仅废气中的水蒸汽被冷凝回收，废气中的余热也得以充分利用，节约能源。
具体地，补水装置17包括冷水泵170、补水管171和冷水阀172，其中，补水管171的第一端通过冷水阀172与冷水泵170相连通，补水管171的第二端与喷淋装置14相连通，通过调节冷水阀172的开度可以调节补水装置17向喷淋装置14供给的水流量，即喷淋装置14的喷淋冷水流量。
废气在继续上升的过程中遇到旋流板15，利用旋流板15的旋转运动及其产生的离心力将废气甩向废气排放烟筒11的筒壁11a，废气中的一部分水蒸汽在这个过程中被液化，并沿筒壁11a滑至底部，通过泄水管13流入储水罐12中。还有一部分水蒸汽在随着废气上升过程中经过丝网除雾器16时，由于惯性作用与丝网除雾器16相撞，而液化并附着在丝网除雾器16上，并在重力作用下从丝网除雾器16脱离下落，从而被回收。
通过以上三重回收装置，可以将废气中的水蒸汽充分回收至储水罐12中待利用。储水罐12中的热水通过热水利用装置18被排放至石膏板生产线的配料系统中，不仅节约水资源，还能够提供料浆的温度，便于成型石膏板的干燥过程的顺利进行，节约耗能，有效降低生产成本。
具体地，热水利用装置18包括热水管180、热水泵181和热水阀182，热水管180通过热水阀182与热水泵181相连通；储水罐12的底端与热水泵181相连通，热水管180还与配料系统相连通，例如，可以与纸浆罐和发泡剂清水罐相连通，可以通过调节热水阀182的开度来控制配料系统中料浆的温度。
需要指出的是，普通的干燥机废气排放烟筒中没有任何回收装置，所以直径为1000mm左右足以，但在本发明的干燥机余热回收利用系统100中，为了便于水蒸汽回收装置的安装使用，其废气排放烟筒11的直径增加为2000mm左右。该废气排放烟筒11可以垂直设置，也可以倾斜设置；但是均要求废气排放烟筒11的底部11b与水平面呈第一预设角度α设置，以便于冷凝后的热水以及喷淋水的回收。
考虑到废气排放烟筒11的使用环境和安装情况，根据使用安装环境以及发明人的多次实验结果，第一预设角度α为3°～10°时，冷凝水和喷淋水的回收效果好，而且不影响废气排放烟筒11的安装稳定性。例如，第一预设角度α可以选择设置为3°、5°、8°等。
根据本发明的干燥机余热回收利用系统100还包括预热器20、废气风机21和补风机22，其中，预热器20的第一端201与废气排放烟筒11相连通，预热器20的第一端201的底部与补风机22相连通，预热器20的第二端202与废气风机21相连通，预热器20的第二端202的底部通过管道30与干燥机(图中未示出)相连通。废气风机21通过管道30将干燥机中的废气抽入预热器20中加热，同时补风机22将干净空气也抽入预热器20中进行预热，然后经由管道30进入干燥机中进行热能供给。在干净空气经过预热器20的过程中，会将部分废气共同带回干燥机进行热能供给，对废气中的热能实现重复利用。
另外，根据本发明的干燥机余热回收利用系统100还包括折流板19，折流板19位于废气排放烟筒11内，相对于废气排放烟筒11的废气入口110设置，且与废气排放烟筒11的筒壁11a呈第二预设角度β设置。折流板19的作用是引导废气顺利沿废气排放烟筒11向上排放，避免大量废气在经过废气入口110后再废气排放烟筒11底部徘徊拥堵。
具体地，第二预设角度β为30°～60°时，折流板19的引导作用发挥较大，废气的排放较为顺利。例如，第二预设角度β可以选择设置为36°、45°、56° 等。
根据本发明的干燥机余热回收利用系统100还包括第一液位计121、第二液位计122、温度计123和报警器(图中未示出)。其中，第一液位计121位于储水罐12的中间部位，第二液位计122位于第一液位计121的上方，温度计123位于第一液位计121的下方，第一液位计121和第二液位计122均与报警器电连接。第一液位计121和第二液位计122的设置，是为了确保储水罐12内的热水量位于第一液位计121和第二液位计122之间，以避免储水罐12干涸而影响配料系统的运行、或者储水罐12内的热水满溢而导致回收的水无处排放而影响干燥机废气的 排放以及废气中的水蒸汽和余热的回收利用效率。当储水罐12内的水位低于第一液位计121时，第一液位计121触发报警器进行低水位报警，工作人员可以通过调大冷水阀172的开度来迅速增加回收到储水罐12的热水量，从而消除警报；当储水罐12内的水位高于第二液位计122时，第二液位计122触发报警器进行高水位报警，工作人员可以通过调小冷水阀172的开度来减少回收至储水罐12内的热水量，同时由于热水利用装置18在将储水罐12内的热水排放至配料系统中，从而可以有效降低储水罐12内的水位。其中，温度计123用以实时测量储水罐12内的热水温度，为避免温度计123露出热水表面无法实现温度测量，所以将温度计123设置在第一液位计121的下方。
需要指出的是，喷淋装置14、旋流板15以及丝网除雾器16的位置可以根据实际情况进行设置和变动。例如，在本实施例中，喷淋装置14位于废气排放烟筒11的废气入口110的上方，使得进入废气排放烟筒11的废气充分被冷水喷淋；旋流板15位于喷淋装置14的上方，以免旋流板15被冷水喷淋而影响其水蒸汽收集效果；由于旋流板15的回收过程导致上升过程中废气产生旋流动作，有利于丝网除雾器16的工作，所以旋流板15位于丝网除雾器16的下方。
具体地，喷淋装置14可以包括N个喷淋盘管140和多个喷嘴141，其中，N为大于等于1的正整数，N个喷淋盘管140依次设置在废气排放烟筒11内，且N个喷淋盘管140中每个喷淋盘管140上均设置有一个或者多个喷嘴141。N个喷淋盘管140依次、互相平行、且垂直于筒壁11a设置，即垂直于废气的排放方向设置，实现对废气的多重喷淋，最大化回收废气中的水蒸汽。另外，N个喷淋盘管140也可以互成一定角度进行设置，只要能够保证N个喷淋盘管140喷淋的冷水在废气入口110以上某一个平面内能够完全覆盖废气排放烟筒11的横截面即可。其中，每个喷淋盘管140上均分布多个喷嘴141，以保证每个喷淋盘管140都能够对废气实现在废气排放烟筒11横截面内最大范围的喷淋，以保证将废气中的水蒸汽进行充分回收。
相适应地，补水装置17包括N条补水管171和N个冷水阀172，其中，N条补水管171的第一端和N个冷水阀172一一对应与冷水泵170相连通，N条补水管171的第二端分别与N个喷淋盘管140一一对应相连通，以确保每个喷淋盘管140均对应设置有一个冷水阀，以便于实现其冷水喷淋量的单独控制。
示例性地，在如图1所示的实施例中，喷淋装置14包括三个喷淋盘管140，三个喷淋盘管140由低到高依次设置在废气入口110的上方；对应地，补水装置17包括三条补水管171和三个冷水阀172，喷淋盘管140、补水管171以及冷水阀172一一对应相连通，可以根据实际使用情况进行控制每个喷淋盘管140喷淋的冷水流量。例如，通常情况下，在冬季补水管171中的冷水温度为5℃，下端的喷淋盘管140对应的冷水阀172为全开，中间喷淋盘管140对应的冷水阀172的开度为1/2，上端的喷淋盘管140对应的冷水阀172的开度可以为1/3，这样收集水 温为55℃，热水阀182全开即可保证储水罐12内的水位在第一液位计121和第二液位计122之间，同时满足配料系统的水量和温度需要；当配料系统的水量需求减小时，调小热水阀182的开度，则储水罐12内的水位开始上升，所以可以适当调节三个冷水阀172的开度以保持水位不变，例如，可以调小上端或者中间的喷淋盘管140对应的冷水阀172的开度。
具体地，旋流板15的叶片151为不锈钢材质，叶片151的厚度为4mm～5mm，可以有效保证旋流板15的使用寿命；叶片151的倾斜角度为5°～8°，足以充分回收废气中的水蒸汽。
根据本发明的干燥机余热回收利用系统100，利用补风机22通过预热器20与干燥机连通，可以回收废气中的一部分热量加以利用；通过喷淋装置14中的多个喷淋盘管140进行多次喷淋降温，回收废气中的大部分水蒸汽的同时，充分再利用废气中的热量对喷淋冷水进行加热，并回收利用到配料系统中；还设置旋流板15以及丝网除雾器16对废气中的残余水蒸汽进行进一步地回收。该干燥机余热回收利用系统100能够对干燥机废气中的余热和水蒸汽进行完全回收再利用，充分节能减耗，节约水资源，提高产品的合格率，同时有效降低生产成本。
本发明还提供了一种使用根据本发明所提供的干燥机余热回收利用系统100的干燥机余热回收利用方法，该方法包括：将热水管180的输出端与配料系统的纸浆罐和发泡剂清水罐相连通；通过干燥机余热回收利用系统100将废气中的水蒸汽化为热水回收至储水罐12内；实时测量纸浆罐的内部温度和发泡剂清水罐的内部温度，并根据纸浆罐的内部温度和发泡剂清水罐的内部温度控制热水阀182的开度，使纸浆罐的内部温度和发泡剂清水罐的内部温度满足生产要求；实时测量储水罐12的水位，并根据储水罐12的水位控制冷水阀172的开度，使储水罐12内的水位保持在预设水位区间内。
具体地，根据纸浆罐的内部温度和发泡剂清水罐的内部温度控制热水阀182的开度包括：当纸浆罐的内部温度和发泡剂清水罐的内部温度高于预定温度的最大值时，减小热水阀182的开度，减少热水供应来降低料浆温度；或者还可以增加冷水阀172的开度，通过降低回收至储水罐12内的热水温度，来降低料浆温度，以达到生产需求。相适应地，当纸浆罐的内部温度和发泡剂清水罐的内部温度低于预定温度的最小值时，可以通过增大热水阀182的开度直接提升料浆温度；或者通过减小冷水阀172的开度，增加回收的热水温度，从而达到提升料浆温度的目的。
具体地，喷淋装置14的喷淋盘管140的个数以及冷水阀172的个数为多个时，按照喷淋盘管140在废气排放烟筒11内的固定位置从高到低的顺序，多个喷淋盘管140所对应的多个冷水阀172的开度依次增加。即，底端的喷淋盘管140所对应的冷水阀172的开度大于顶端的喷淋盘管140所对应的冷水阀172的开度，通常情况下，底端的喷淋盘管140所对应的冷水阀172为全开状态，目的是从底部开始尽量多的回收废气中的水蒸汽，减少上方的喷淋盘管140的 工作压力的同时，确保废气中的水蒸汽能够被最大化回收。
另外，该干燥机余热回收利用方法还包括：实时测量储水罐12内第一液位计121的值，根据第一液位计121的值判定储水罐12内的水位低于第一液位计121所在的位置时，通过报警器发出储水罐12低水位报警信号，以避免由于储水罐12内的热水量不足而对配料系统造成影响，导致的产品报废，影响生产进程，还会造成生产成本的不必要浪费。实时测量储水罐12内第二液位计122的值，根据第二液位计122的值判定储水罐12内的水位高于第二液位计122所在的位置时，通过报警器发出储水罐12高水位报警信号，以避免储水罐12内的热水发生满溢，致使回收的热水无处排放而在废气排放烟筒11内存贮，影响废气的流通和排放，甚至溢入预热器20，影响预热器20的的运行，更甚至会通过管道30流入干燥机等生产设备，对生产设备、生产过程以及产品质量造成无法挽回的恶劣后果，为工厂带来巨大的经济损失。
上面描述的内容可以单独地或者以各种方式组合起来实施，而这些变型方式都在本发明的保护范围之内。
本发明中列出的构件的具体尺寸数值是示例性数值，不同构件的尺寸参数根据房屋建筑需要可在实际工程中采用不同的数值。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括……”限定的要素，并不排除在包括所述要素的物品或者设备中还存在另外的相同要素。
以上实施例仅用以说明本发明的技术方案而非限制，仅仅参照较佳实施例对本发明进行了详细说明。本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围，均应涵盖在本发明的权利要求范围当中。
工业实用性
本发明通过补风机将经由预热器加热后的热风补充到干燥机中加以利用；通过在废气排放烟筒内设置喷淋装置、旋流板和丝网除雾器多道水分收集装置，将废气中的水分形成热水充分回收，并输送到配料系统中，实现废水的再生利用。不仅能够节约水资源，还有效提高了料浆的温度，降低产品的不合格率，将废气中的热能也充分利用，节约耗能，有效降低生产成本。

Claims (10)

  1. 一种干燥机余热回收利用系统(100)，其特征在于，所述干燥机余热回收利用系统(100)包括废气排放烟筒(11)、储水罐(12)、泄水管(13)、喷淋装置(14)、旋流板(15)、丝网除雾器(16)、补水装置(17)以及热水利用装置(18)，其中，所述废气排放烟筒(11)的底端与所述储水罐(12)的顶端通过所述泄水管(13)相连通，所述喷淋装置(14)、所述旋流板(15)和所述丝网除雾器(16)均设置在所述废气排放烟筒(11)的内部，且所述喷淋装置(14)与所述补水装置(17)相连通；
    并且其中，所述补水装置(17)包括冷水泵(170)、补水管(171)和冷水阀(172)，其中，所述补水管(171)的第一端通过所述冷水阀(172)与所述冷水泵(170)相连通，所述补水管(171)的第二端与所述喷淋装置(14)相连通；
    并且其中，所述废气排放烟筒(11)垂直设置，且所述废气排放烟筒(11)的底部(11b)与水平面呈第一预设角度α设置。
  2. 如权利要求1所述的干燥机余热回收利用系统(100)，其特征在于，
    所述干燥机余热回收利用系统(100)还包括预热器(20)、废气风机(21)和补风机(22)，其中，所述预热器(20)的第一端(201)与所述废气排放烟筒(11)相连通，所述预热器(20)的第一端(201)的底部与所述补风机(22)相连通，所述预热器(20)的第二端(202)与所述废气风机(21)相连通。
  3. 如权利要求1或2所述的干燥机余热回收利用系统(100)，其特征在于，
    所述干燥机余热回收利用系统(100)还包括折流板(19)，所述折流板(19)位于所述废气排放烟筒(11)内，相对于所述废气排放烟筒(11)的废气入口(110)设置，且与所述废气排放烟筒(11)的筒壁(11a)呈第二预设角度β设置。
  4. 如权利要求1或2所述的干燥机余热回收利用系统(100)，其特征在于，
    所述干燥机余热回收利用系统(100)还包括第一液位计(121)、第二液位计(122)、温度计(123)和报警器，其中，所述第一液位计(121)位于所述储水罐(12)的中间部位，所述第二液位计(122)位于所述第一液位计(121)的上方，所述温度计(123)位于所述第一液位计(121)的下方，所述第一液位计(121)和所述第二液位计(122)均与所述报警器电连接。
  5. 如权利要求1所述的干燥机余热回收利用系统(100)，其特征在于，
    所述喷淋装置(14)位于所述废气排放烟筒(11)的废气入口(110)的上方，所述旋流板(15)位于所述喷淋装置(14)的上方，且位于所述丝网除雾器(16)的下方；
    其中，所述喷淋装置(14)包括N个喷淋盘管(140)和多个喷嘴(141)，N为大于等于1的正整数，N个所述喷淋盘管(140)依次设置在所述废气排放烟筒(11)内，且N个所述喷淋盘管(140)中每个所述喷淋盘管(140)上均设置有一个或者多个所述喷嘴(141)；
    并且其中，所述补水装置(17)包括N条所述补水管(171)和N个所述冷水阀(172)，其中，N条所述补水管(171)的第一端和N个所述冷水阀(172)一一对应与所述冷水泵(170)相连通，N条所述补水管(171)的第二端分别与N个所述喷淋盘管(140)一一对应相连通。
  6. 如权利要求1所述的干燥机余热回收利用系统(100)，其特征在于，
    所述旋流板(15)的叶片(151)为不锈钢材质，所述叶片(151)的厚度为4mm～5mm，所述叶片(151)的倾斜角度为5°～8°。
  7. 使用如权利要求1～6所述的干燥机余热回收利用系统(100)的干燥机余热回收利用方法，其特征在于，
    所述干燥机余热回收利用方法包括：
    将所述热水管(180)的输出端与纸浆罐和发泡剂清水罐相连通；
    通过所述干燥机余热回收利用系统(100)将废气中的水蒸汽化为热水回收至所述储水罐(12)内；
    实时测量所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度，并根据所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度控制所述热水阀(182)的开度，使所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度满足生产要求；
    实时测量所述储水罐(12)的水位，并根据所述储水罐(12)的水位控制所述冷水阀(172)的开度，使所述储水罐(12)内的水位保持在预设水位区间内。
  8. 如权利要求7所述的干燥机余热回收利用方法，其特征在于，
    所述根据所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度控制所述热水阀(182)的开度包括：
    当所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度高于预定温度的最大值时，减小所述热水阀(182)的开度；当所述纸浆罐的内部温度和所述发泡剂清水罐的内部温度低于预定温度的最小值时，增大所述热水阀(182)的开度。
  9. 如权利要求7所述的干燥机余热回收利用方法，其特征在于，
    所述喷淋装置(14)的喷淋盘管(140)的个数以及所述冷水阀(172)的个数为多个时，按照所述喷淋盘管(140)在所述废气排放烟筒(11)内的固定位置从高到低的顺序，多个所述喷淋盘管(140)所对应的多个所述冷水阀(172)的开度依次增加。
  10. 如权利要求7所述的干燥机余热回收利用方法，其特征在于，
    所述方法还包括：
    实时测量所述储水罐(12)内所述第一液位计(121)的值，根据所述第一液位计(121)的值判定所述储水罐(12)内的水位低于所述第一液位计(121)所在的位置时，通过所述报警器发出储水罐(12)低水位报警信号；
    实时测量所述储水罐(12)内所述第二液位计(122)的值，根据所述第二液位计(122)的值判定所述储水罐(12)内的水位高于所述第二液位计(122)所在的位置时，通过所述报警器发出储水罐(12)高水位报警信号。
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