Low-energy-consumption maltol production method and application thereof

Abstract

The present invention belongs to the technical field of maltol production. Disclosed are a low-energy-consumption maltol production method and the application thereof. The production method comprises: adding a cyclone dust collector on the basis of an original bag dust collector, wherein the cyclone dust collector is connected to the bag dust collector by means of an induced draft duct. The present invention breaks through conventional drying modes; hot air generated by steam wasted in the previous drying process is recovered, which can not only ensure the completion of a normal drying process, but also reduce the energy consumption, thereby further improving the production efficiency and reducing the production cost; and residual dust is effectively recovered, thereby mitigating the impact of environmental odors and providing environmental benefits.

Description

A low-energy production method for maltol and its application Technical Field

[0001] This invention belongs to the field of maltol production technology, specifically, it relates to a low-energy-consumption method for producing maltol and its application. Background Technology

[0002] Maltol imparts a distinctive aroma to caramel hard candy and is an excellent flavor enhancer and low-sweetness agent in food and beverages. As the applications of maltol continue to expand, its usage is also increasing. Improving current production processes, reducing production costs, and providing more competitive products are pressing technical challenges that need to be addressed.

[0003] In maltol production, material drying has traditionally employed a vibrating fluidized bed. A certain amount of filtered and heated air enters the bed, with precise control over the inlet air temperature. Typically, wet finished material is evenly drawn into the distributor by a vortex pump and added uniformly to the fluidized bed, ensuring thorough contact with air. Continuous heating by steam keeps the product in a loose state, guaranteeing flow rate and quality throughout the drying process, ultimately achieving the desired dryness. The exhaust gas, carrying fine powder, is treated by the expansion principle of the equipment, causing the fine powder to settle at an ideal velocity within the drying bed, minimizing the fine powder content in the exhaust air. The exhaust gas is then filtered by a bag filter and washed in a water scrubbing tower before being released into the atmosphere. However, this drying process involves excess steam being carried away by an induced draft fan, increasing steam costs, resulting in poor operational stability, increased workload on subsequent auxiliary equipment such as the water scrubbing tower, and uncontrollable odors. This approach is ultimately counterproductive and incompatible with current energy-saving and emission-reduction production requirements. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a low-energy-consumption method for producing maltol. By improving the drying process, excess hot air can be reused, successfully reducing production costs and alleviating the production load on subsequent auxiliary equipment. While saving steam costs, it significantly improves product conversion rate and reduces subsequent dust generation, thereby increasing environmental benefits.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] On the one hand, the present invention provides a low-energy-consumption method for producing maltol and its application.

[0007] The production method involves adding a cyclone dust collector to the existing bag filter dust collector, with the cyclone dust collector connected to the bag filter dust collector via an exhaust duct.

[0008] This invention enables effective material recovery by adding a cyclone dust collector, reducing material loss and greatly improving product conversion rate.

[0009] Furthermore, the height-to-diameter ratio of the cyclone dust collector is 6-10; preferably 7-9; further preferably 8-8.8; and most preferably 8.4.

[0010] Furthermore, the diameter of the exhaust port of the cyclone dust collector is 0.5-1.5 times the diameter of the cyclone dust collector cylinder; preferably 0.8-1.2 times; further preferably 0.9-1 times; and most preferably 1 times.

[0011] In some implementations, the production method further includes adding a buffer tank to the existing induced draft fan. The buffer tank is connected to the induced draft fan, and the air volume is controlled by a regulating valve. The hot air from the bag filter is introduced into the buffer tank by the induced draft fan.

[0012] Furthermore, the air volume is 50-80% of the hot air flow rate of the bag filter; preferably 60-75%; more preferably 65-70%.

[0013] In this invention, the hot air flow rate of the bag filter is the amount of hot air flowing through the bag filter in 1 hour.

[0014] Furthermore, the hot air in the buffer tank is returned to the fluidized bed by a blower for hot air reuse.

[0015] Through optimization and improvement, this invention enables the reuse of surplus hot air, resulting in a significant reduction in overall steam consumption.

[0016] In some implementation schemes, the production method specifically includes the following steps:

[0017] (1) Hot air from the drying workshop enters the cyclone dust collector, dust is discharged through the discharge port, and hot air enters the bag dust collector.

[0018] (2) Part of the hot air from the bag filter is sent to the water washing tower for washing and then discharged. The remaining part is sent to the buffer tank by the induced draft fan and returned to the drying workshop for hot air reuse by the blower.

[0019] On the other hand, the present invention provides the application of the above-mentioned production method in the energy-saving production of maltol.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) This invention breaks through the traditional drying mode and recovers the steam wasted in the previous drying process by hot air, which can not only ensure the completion of the normal drying process, but also save energy consumption, further improve production efficiency, save production costs, effectively recover residual dust, reduce the impact of environmental odor, and have environmental benefits.

[0022] (2) The present invention can reuse excess hot air, significantly reducing the overall steam consumption, with a 30-40% reduction in steam per ton of product.

[0023] (3) The production load of the water washing tower of the present invention is reduced, the service life of the equipment is extended, the operational stability is greatly improved, the overall yield of the process is effectively improved, and it has certain economic benefits.

[0024] (4) Compared with the prior art, the present invention adds relevant auxiliary equipment, greatly improves steam energy consumption and dust recovery, significantly improves environmental odor, ensures the washing effect of water washing tower, and has significant energy saving and emission reduction effects.

[0025] (5) By adding auxiliary equipment, the present invention achieves the purpose of controllable steam, controllable dust, and controllable environmental odor. The process improvement cost is low, and it provides technical support for energy saving and emission reduction of similar drying processes. Attached Figure Description

[0026] Figure 1 is a flowchart of the improved process of the present invention.

[0027] Among them, 1 is a cyclone dust collector, 2 is a bag dust collector, 3 is an induced draft fan, 4 is a water washing tower, and 5 is a buffer tank. Detailed Implementation

[0028] The following describes the implementation of the present invention with specific examples. Before further describing the specific implementation of the present invention, it should be understood that the scope of protection of the present invention is not limited to the specific implementation schemes described below; it should also be understood that the terminology used in the embodiments of the present invention is for describing specific implementation schemes, and not for limiting the scope of protection of the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] The present invention provides a low-energy-consumption method for producing maltol, as shown in Figure 1. Its improvement over the prior art is that the drying process has been improved, specifically: a cyclone dust collector 1 is added before the air inlet of the bag dust collector 2, and a buffer tank 5 is added after the induced draft fan 3.

[0031] The specific implementation method is as follows:

[0032] (1) Hot air from the drying workshop enters the cyclone dust collector 1, and dust is discharged through the discharge port. Hot air enters the bag dust collector 2.

[0033] (2) Part of the hot air from the bag filter enters the washing tower 4 through the induced draft fan 3 and is then discharged. The remaining part is introduced into the buffer tank 5 through the induced draft fan 3 and returned to the drying workshop for hot air reuse through the blower.

[0034] This invention breaks through the traditional drying mode by recovering the steam wasted in the previous drying process with hot air. This not only ensures the completion of the normal drying process, but also saves energy, further improves production efficiency, saves production costs, effectively recovers residual dust, reduces the impact of environmental odor, and has environmental benefits.

[0035] To further understand the technical solution of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to specific embodiments. The existing maltol production process of the present invention uses a fluidized bed drying method in its drying workshop, with a hot air volume of 8000 m³ / h. 3 / h, dust content is 0.088%, exhaust duct Φ500cm, bag filter specifications: 120cm×2000cm.

[0036] Example 1: A low-energy-consumption method for producing maltol

[0037] The production method includes the following steps:

[0038] (1) Hot air from the drying workshop enters the cyclone dust collector 1, and dust is discharged through the discharge port. The hot air enters the bag dust collector 2, wherein the height-to-diameter ratio of the cyclone dust collector is 8.4, specifically Φ150cm×1260cm, and the exhaust port is Φ150cm.

[0039] (2) The hot air from the bag filter is regulated by the regulating valve. 68% of the hot air is introduced into the buffer tank 5 (2000mm×2000mm) by the induced draft fan 3 and returned to the drying workshop for hot air reuse by the blower. The remaining hot air is sent to the water washing tower 4 by the induced draft fan 3 for washing and then discharged. The dust is discharged through the discharge port.

[0040] Example 2: A low-energy-consumption method for producing maltol

[0041] The production method includes the following steps:

[0042] (1) Hot air from the drying workshop enters the cyclone dust collector 1, and dust is discharged through the discharge port. The hot air enters the bag dust collector 2. The height-to-diameter ratio of the cyclone dust collector is 7, specifically Φ188cm×1316cm, and the exhaust port is Φ150cm.

[0043] (2) The hot air from the bag filter is regulated by the regulating valve. 60% of the hot air is introduced into the buffer tank 5 (2000mm×2000mm) by the induced draft fan 3 and returned to the drying workshop for hot air reuse by the blower. The remaining hot air is sent to the water washing tower 4 by the induced draft fan 3 for washing and then discharged. The dust is discharged through the discharge port.

[0044] Example 3: A low-energy-consumption method for producing maltol

[0045] The production method includes the following steps:

[0046] (1) Hot air from the drying workshop enters the cyclone dust collector 1, and dust is discharged through the discharge port. The hot air enters the bag dust collector 2. The height-to-diameter ratio of the cyclone dust collector is 9, specifically Φ180cm×1620cm, and the exhaust port is Φ150cm.

[0047] (2) The hot air from the bag filter is regulated by the regulating valve. 75% of the hot air is introduced into the buffer tank 5 (2000mm×2000mm) by the induced draft fan 3 and returned to the drying workshop for hot air reuse by the blower. The remaining hot air is sent to the water washing tower 4 by the induced draft fan 3 for washing and then discharged. The dust is discharged through the discharge port.

[0048] Comparative Example 1

[0049] The production method includes the following steps:

[0050] (1) Hot air from the drying workshop enters the cyclone dust collector 1, and dust is discharged through the discharge port. The hot air enters the bag dust collector 2. The height-to-diameter ratio of the cyclone dust collector is 4, specifically Φ330cm×1320cm, and the exhaust port is Φ150cm.

[0051] (2) The hot air from the bag filter is regulated by the regulating valve. 50% of the hot air is introduced into the buffer tank 5 (2000mm×2000mm) by the induced draft fan 3 and returned to the drying workshop for hot air reuse by the blower. The remaining hot air is sent to the water washing tower 4 by the induced draft fan 3 for washing and then discharged. The dust is discharged through the discharge port.

[0052] Comparative Example 2

[0053] The production method includes the following steps:

[0054] (1) Hot air from the drying workshop enters the cyclone dust collector 1, and dust is discharged through the discharge port. The hot air enters the bag dust collector 2. The height-to-diameter ratio of the cyclone dust collector is 11, specifically Φ100cm×1100cm, and the exhaust port is Φ150cm.

[0055] (2) The hot air from the bag filter is regulated by the regulating valve. 90% of the hot air is introduced into the buffer tank 5 (2000mm×2000mm) by the induced draft fan 3 and returned to the drying workshop for hot air reuse by the blower. The remaining hot air is sent to the water washing tower 4 by the induced draft fan 3 for washing and then discharged. The dust is discharged through the discharge port.

[0056] Table 1 Note: 1. The calculation method for the steam reduction rate per ton of product in Table 1 is: (actual steam consumption per ton of product - steam consumption per ton of product before improvement) * 100 / steam consumption per ton of product before improvement; 2. The calculation method for the dust recovery rate in Table 1 is: (actual dust recovery amount per ton of product - dust recovery amount per ton of product before improvement) * 100 / dust recovery amount per ton of product before improvement.

[0057] The above description, in conjunction with specific embodiments, further illustrates the present invention. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions to the details and form of the technical solutions of the present invention can be made without departing from the spirit and scope of the invention, and all such modifications and substitutions fall within the protection scope of the present invention.

Claims

1. A low-energy-consumption method for producing maltol, characterized in that, A cyclone dust collector is added to the existing bag filter dust collector, and the cyclone dust collector is connected to the bag filter dust collector through an exhaust duct.

2. The production method according to claim 1, characterized in that, The exhaust port of the cyclone dust collector is connected to the inlet of the bag dust collector.

3. The production method according to claim 1, characterized in that, The height-to-diameter ratio of the cyclone dust collector is 6-10, and the diameter of the exhaust port of the cyclone dust collector is 0.5-1.5 times the diameter of the cyclone dust collector cylinder.

4. The production method according to claim 1, characterized in that, The height-to-diameter ratio of the cyclone dust collector is 7-9, and the diameter of the exhaust port of the cyclone dust collector is 0.8-1.2 times the diameter of the cyclone dust collector cylinder.

5. The production method according to claim 1, characterized in that, The height-to-diameter ratio of the cyclone dust collector is 8-8.8, and the diameter of the exhaust port of the cyclone dust collector is 0.9-1 times the diameter of the cyclone dust collector cylinder.

6. The production method according to claim 1, characterized in that, The height-to-diameter ratio of the cyclone dust collector is 8.4, and the diameter of the exhaust port of the cyclone dust collector is 1 / 3 of the diameter of the cyclone dust collector cylinder.

7. The production method according to claim 1, characterized in that, It also includes adding a buffer tank to the original induced draft fan. The buffer tank is connected to the induced draft fan, and the air volume is controlled by a regulating valve. The hot air from the bag filter is introduced into the buffer tank by the induced draft fan.

8. The production method according to claim 7, characterized in that, The air volume is 50-80% of the hot air flow rate of the bag filter; preferably 60-75%; more preferably 65-70%.

9. The production method according to any one of claims 1-7, characterized in that, Includes the following steps: (1) Hot air from the drying workshop enters the cyclone dust collector, dust is discharged through the discharge port, and hot air enters the bag dust collector. (2) Part of the hot air from the bag filter is sent to the water washing tower for washing and then discharged. The remaining part is sent to the buffer tank by the induced draft fan and returned to the drying workshop for hot air reuse by the blower.

10. The application of the production method according to any one of claims 1-9 in the energy-saving production of maltol.

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