Energy-saving and environment-friendly potassium sulfate Mannheim furnace based on electromagnetic heating device

Abstract

The invention discloses an energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device. The energy-saving and environment-friendly potassium sulfate Mannheim furnace comprises a potassium sulfate Mannheim furnace body, the electromagnetic heating device and a temperature control device. The potassium sulfate Mannheim furnace body comprises a combustion chamber which is provided with an air inlet and an air return port; the electromagnetic heating device comprises a base, a heating air supply pipe, an electromagnetic coil and an air blower; the heating air supply pipe is installed on the base, the electromagnetic coil is wound on the heating air supply pipe, the heating air supply pipe and an air inlet and an air return opening of the combustion chamber form a heating circulation channel, and the air blower promotes air flow in the heating circulation channel to circulate. The temperature control device is used for controlling the temperature of airflow in the heating air supply pipe. According to the energy-saving and environment-friendly potassium sulfate Mannheim furnace based on the electromagnetic heating device, the electromagnetic heating device is integrated in a limited space, so that the heating efficiency is improved, meanwhile, the heating temperature of the electromagnetic heating device is controlled through a more economical and effective means, and the better energy-saving and environment-friendly effects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of potassium sulfate Mannheim furnaces, and in particular to an energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device. Background Art

[0002] The traditional potassium sulfate Mannheim furnace is mainly heated by natural gas. During operation, most of the heat released by the combustion of natural gas is carried away by the exhaust gas, resulting in low energy utilization efficiency.

[0003] In order to better respond to the country's call for energy conservation and environmental protection, potassium sulfate production companies need to carry out technical transformation of the existing potassium sulfate Mannheim furnace, replacing traditional natural gas heating with electromagnetic heating. Electromagnetic heating has the advantages of high heat conversion rate, accurate temperature control, energy conservation and environmental protection.

[0004] In the process of technical transformation of potassium sulfate Mannheim furnace, the following technical problems mainly exist:

[0005] (1) The existing potassium sulfate Mannheim furnace was designed for natural gas heating at the beginning, and the space size has been fixed. How to integrate the electromagnetic heating device in the limited space to improve the heating efficiency is a technical difficulty that needs to be solved;

[0006] (2) How to control the heating temperature of the electromagnetic heating device through more economical and effective means so that the materials in the furnace can react normally is also a technical problem that needs to be solved. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an energy-saving and environmentally friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device, which integrates the electromagnetic heating device in a limited space to improve the heating efficiency, and at the same time controls the heating temperature of the electromagnetic heating device by more economical and effective means.

[0008] The objective of the present invention is achieved through the following technical solutions:

[0009] An energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device, comprising: a potassium sulfate Mannheim furnace body, an electromagnetic heating device, and a temperature control device;

[0010] The potassium sulfate Mannheim furnace body comprises a combustion chamber, wherein the combustion chamber has an air inlet and an air return port;

[0011] The electromagnetic heating device comprises: a base, a heating air supply pipe, an electromagnetic coil, and a blower; the heating air supply pipe is installed on the base, the electromagnetic coil is wound around the heating air supply pipe, the heating air supply pipe and the air inlet and return air outlet of the combustion chamber form a heating circulation channel, and the blower causes the airflow in the heating circulation channel to circulate back and forth;

[0012] The temperature control device is used to control the temperature of the air flow in the heating air supply pipe.

[0013] In one embodiment,

[0014] The heating air supply pipe comprises: a spirally wound pipe and an air flow return pipe; the spirally wound pipe is wound in a spiral manner to obtain a through hollow chamber, and the spirally wound pipe has an air inlet nozzle and an air outlet nozzle, and the air inlet nozzle and the air outlet nozzle are respectively located at the two end surfaces of the hollow chamber;

[0015] One end of the airflow return pipe is connected to the air outlet nozzle, and the other end of the airflow return pipe is connected to an end surface of the hollow chamber located at the air inlet nozzle;

[0016] The hollow chamber is located at one end surface of the air outlet nozzle and is connected to the air inlet of the combustion chamber, and the return air port of the combustion chamber is connected to the air inlet nozzle through the blower;

[0017] The spirally wound tube forms a plurality of winding connection layers, and the connection between the plurality of winding connection layers forms a through spiral waterway, and the spiral waterway has a water inlet and a water outlet;

[0018] The temperature control device includes: a water tower, a water pump, a water inlet pipe, and a return pipe; the water tower and the water inlet are connected via the water inlet pipe, the water outlet and the water tower are connected via the return pipe, a water circulation channel is formed between the water tower, the water inlet pipe, the spiral waterway, and the return pipe, and the water pump is used to make the water in the water circulation channel circulate back and forth.

[0019] In one of the embodiments, the electromagnetic heating device further comprises an inner cylinder, wherein the inner cylinder is disposed in the hollow chamber, and an annular air passage having an annular cross section is formed between the inner cylinder and the cavity wall of the hollow chamber.

[0020] In one of the embodiments, the annular air duct extends linearly from one end of the hollow chamber to the other end, and a turbofan is disposed in the annular air duct.

[0021] In one embodiment, a groove is formed on the wall of the spirally wound tube, and the groove is located between a plurality of the wound connection layers. The plurality of the wound connection layers are welded to each other to seal the groove, and the grooves in each of the wound connection layers are interconnected to form the spiral waterway.

[0022] In one embodiment, there are multiple electromagnetic heating devices, and the multiple electromagnetic heating devices are arranged around the potassium sulfate Mannheim furnace body; each electromagnetic heating device is independently configured with a set of the temperature control device.

[0023] In one embodiment, the number of the electromagnetic heating devices is four, and the power of each electromagnetic heating device is 120KW.

[0024] In one embodiment, the outer side wall of the spirally wound tube is covered with an insulation layer.

[0025] The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device of the present invention integrates the electromagnetic heating device in a limited space to improve the heating efficiency, and also controls the heating temperature of the electromagnetic heating device by more economical and effective means. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of an energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A partial schematic diagram of an energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device is shown;

[0029] Figure 3 for Figure 2 A three-dimensional diagram of the electromagnetic heating device shown (a);

[0030] Figure 4 for Figure 2 A three-dimensional diagram of the electromagnetic heating device shown (II);

[0031] Figure 5 for Figure 2 A side view of the electromagnetic heating device shown;

[0032] Figure 6 for Figure 3 The structural diagram of the heating air supply pipe of the electromagnetic heating device shown;

[0033] Figure 7 for Figure 6A cross-sectional view of the heating air supply duct shown;

[0034] Figure 8 for Figure 7 Enlarged view at A. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] like Figure 1 As shown, the present invention discloses an energy-saving and environment-friendly potassium sulfate Mannheim furnace 10 based on an electromagnetic heating device, comprising: a potassium sulfate Mannheim furnace body 20, an electromagnetic heating device 30, and a temperature control device 40.

[0039] like Figure 1 As shown, the potassium sulfate Mannheim furnace body 20 includes a combustion chamber 21, and the combustion chamber 21 has an air inlet and a return air outlet.

[0040] like Figure 2 and Figure 3 As shown, the electromagnetic heating device 30 includes: a base 100, a heating air supply pipe 200, an electromagnetic coil 300, and a blower 400. The heating air supply pipe 200 is installed on the base 100, the electromagnetic coil 300 is wound on the heating air supply pipe 200, the heating air supply pipe 200 and the air inlet and return air outlet of the combustion chamber 21 form a heating circulation channel, and the blower 400 causes the air flow in the heating circulation channel to circulate back and forth.

[0041] The temperature control device 40 is used to control the temperature of the air flow in the heating air supply pipe 200 .

[0042] Next, the specific structure of the heating air supply pipe 200 is described:

[0043] like Figure 6 As shown, the heating air supply pipe 200 includes: a spirally wound pipe 210 and an air flow return pipe 220. The spirally wound pipe 210 is spirally wound to obtain a through hollow chamber 230, and the spirally wound pipe 210 has an air inlet nozzle 211 and an air outlet nozzle 212, which are respectively located at the two end surfaces of the hollow chamber 230.

[0044] One end of the airflow return pipe 220 is connected to the air outlet nozzle 212 , and the other end of the airflow return pipe 220 is connected to an end surface of the hollow chamber 230 located at the air inlet nozzle 211 .

[0045] like Figure 1 and Figure 2 As shown, the hollow chamber 230 is located at one end surface of the air outlet nozzle 212 and is connected to the air inlet of the combustion chamber 21 , and the return air port of the combustion chamber 21 is connected to the air inlet nozzle 211 through the blower 400 .

[0046] like Figure 7 As shown, the spirally wound tube 210 forms a plurality of winding connection layers 213, and the connection between the plurality of winding connection layers 213 forms a continuous spiral waterway 240 (such as Figure 8 The spiral water channel 240 has a water inlet 241 and a water outlet 242 (as shown in FIG. Figure 3 shown).

[0047] Next, the specific structure of the temperature control device 40 is described:

[0048] like Figure 2 As shown, the temperature control device 40 includes: a water tower 500, a water pump 600, a water inlet pipe 700, and a return pipe 800. The water tower 500 is connected to the water inlet 241 through the water inlet pipe 700, and the water outlet 242 is connected to the water tower 500 through the return pipe 800. A water circulation channel is formed between the water tower 600, the water inlet pipe 700, the spiral waterway 240, and the return pipe 800, and the water pump 600 is used to make the water flow in the water circulation channel circulate back and forth.

[0049] Next, the working principle of the energy-saving and environment-friendly potassium sulfate Mannheim furnace 10 based on the electromagnetic heating device of the above structure is described:

[0050] The electromagnetic coil 300 is energized, and the current passes through the electromagnetic coil 300 to generate a magnetic field. The magnetic lines of force of the magnetic field are cut when passing through the pipe wall of the heating air supply pipe 200 to generate eddy currents, so that the metal molecules of the heating air supply pipe 200 collide and rub to generate heat;

[0051] The blower 400 works to blow air into the spiral winding tube 210 through the air inlet nozzle 211. The air moves in a spiral in the narrow and long spiral winding tube 210, and the air is heated by the spiral winding tube 210 at the same time.

[0052] The heated airflow comes out from the air outlet nozzle 212 and is guided into the hollow chamber 230 under the guidance of the airflow return pipe 220;

[0053] The airflow passes through the hollow chamber 230 and comes out from one end surface and enters the air inlet of the combustion chamber 21. The airflow conducts heat to the reaction chamber through the combustion chamber 21. Under the continuous stirring of the stirrer, the reactants sulfuric acid and potassium chloride absorb a large amount of heat to obtain potassium sulfate and HCl gas.

[0054] The airflow goes around the combustion chamber 21 once and then comes out from the return air port. Under the blowing action of the blower 400, the airflow returns to the air inlet of the spiral winding tube 210, and the airflow forms a complete internal circulation.

[0055] In the present invention, the outer wall of the spirally wound tube 210 is covered with a heat-insulating layer. By providing the heat-insulating layer (such as a heat-insulating material), the heat dissipation can be reduced, and energy saving can be effectively achieved. In addition, the inner wall of the spirally wound tube 210 can also be provided with a barrier layer (such as an inner sleeve). By providing the barrier layer, on the one hand, the structural strength of the spirally wound tube 210 can be improved, and on the other hand, the influence of the hot air flow in the hollow chamber 230 on the electromagnetic coil 300 can be reduced.

[0056] At the same time, the temperature control device 40 is also working. The water pump 600 extracts water from the water tower 500 and pumps it into the spiral water channel 240 through the water inlet pipe 700. The water flows in a spiral manner in the spiral water channel 240, thereby cooling and controlling the temperature of the spirally wound tube 210.

[0057] The water flows out through the return pipe 800 and flows back to the water tower 500;

[0058] A temperature sensor is provided at the spiral winding tube 210, and the temperature sensor transmits temperature data to the control center for calculation. The control center sends a control instruction to the water pump 600, and controls the speed of the water flow through the water pump 600, so as to cool and control the temperature of the spiral water channel 240 by water cooling; in this way, the electromagnetic heating controller for controlling the electromagnetic coil 300 can work stably at a constant power without causing rapid damage to electronic components and instability of the power grid due to fluctuations.

[0059] like Figure 4 and Figure 5As shown, the electromagnetic heating device 30 further includes an inner cylinder 900, which is placed in the hollow chamber 230, and an annular air passage 910 with an annular cross section is formed between the inner cylinder 900 and the cavity wall of the hollow chamber 230. The annular air passage 910 extends straightly from one end of the hollow chamber 230 to the other end, and a turbofan 920 is arranged in the annular air passage 910.

[0060] Next, the structural design principle of the energy-saving and environment-friendly potassium sulfate Mannheim furnace 10 based on the electromagnetic heating device is described:

[0061] 1. The present invention is a technical transformation based on the traditional potassium sulfate Mannheim furnace using natural gas. The traditional potassium sulfate Mannheim furnace was designed for natural gas heating at the beginning, and the space size has been fixed. Subject to space limitations, the present invention mainly uses a spiral winding tube 210. The spiral winding tube 210 has a longer and narrower airflow channel due to the spiral winding. In this way, the airflow passing through the pipeline can be more easily and fully heated to the specified temperature, breaking the original space limitation problem;

[0062] 2. The heating air supply pipe 200 of the present invention is also provided with an airflow return pipe 220, and the airflow is guided to the hollow chamber 230 through the airflow return pipe 220, based on the following important considerations: since the cross-section of the spirally wound tube 210 itself is relatively small, the airflow blown out thereof cannot be diffused, and the hollow chamber 230 surrounded by the spirally wound tube 210 has a larger diameter, which can better guide and diffuse the airflow into the combustion chamber 21, and the windward surface is larger, which is more conducive to the heating of the combustion chamber 21;

[0063] 3. The traditional temperature control device 40 mainly controls the power of the electromagnetic heating controller, thereby controlling the current of the electromagnetic coil 300 to achieve the purpose of temperature control, but the effect of this temperature control is not obvious and the cost is high; for example, by reducing the current of the electromagnetic coil 300, although the current is small, it is difficult for the spiral winding tube 210 to reach the specified temperature in a short time, and the effect is not obvious; while the present invention uses water flow to control the temperature, and controls the speed of the water flow to control the temperature of the spiral winding tube 210. When it needs to be stabilized at a certain temperature, the water flow can be stopped, and the effect is obvious; in addition, by achieving temperature control by water flow, the electromagnetic heating controller used to control the electromagnetic coil 300 can work stably with a constant power, and will not cause rapid damage to electronic components and instability of the power grid due to high and low power fluctuations, and the cost is lower;

[0064] 4. In the present invention, the inner cylinder 900 is placed in the hollow chamber 230, and an annular air channel 910 with an annular cross-section is formed between the inner cylinder 900 and the cavity wall of the hollow chamber 230. The annular air channel 910 extends straightly from one end of the hollow chamber 230 to the other end. A turbofan 920 is arranged in the annular air channel 910. Under the joint action of the annular air channel 910 and the turbofan 920, the airflow can be diffused more evenly and enter the combustion chamber.

[0065] In the present invention, the wall of the spirally wound tube 210 is provided with grooves (such as Figure 8 As shown in FIG. 1 , the groove is located between the plurality of winding connection layers 213, and the plurality of winding connection layers 213 are welded to each other to seal the groove, and the grooves in each winding connection layer 213 are interconnected to form a spiral waterway. It can be understood that the wall of the spiral winding tube 210 itself has grooves, and the plurality of winding connection layers 213 of the spiral winding tube 210 are welded to each other, and the interconnected grooves form a spiral waterway without the need for additional pipes. The spiral waterway is integrated into the spiral winding tube 210, which is self-contained and durable.

[0066] like Figure 1 As shown, in the present invention, there are multiple electromagnetic heating devices 30, and the multiple electromagnetic heating devices 30 are arranged around the potassium sulfate Mannheim furnace body 20; each electromagnetic heating device 30 is independently configured with a set of temperature control devices 40. Preferably, the number of electromagnetic heating devices 30 is four, and the power of each electromagnetic heating device 30 is 120KW.

[0067] The energy-saving and environment-friendly potassium sulfate Mannheim furnace 10 based on the electromagnetic heating device of the present invention transforms the traditional natural gas heating into electromagnetic heating. The airflow surrounds the combustion chamber 21 once and then comes out from the return air port. Under the blowing action of the blower 400, it returns to the air inlet of the spiral winding tube 210. The airflow forms a complete internal circulation, reduces the emission of smoke, and achieves the effect of energy saving and environmental protection.

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An energy-saving and environmentally friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device, characterized in that: include: Potassium sulfate Mannheim furnace body, electromagnetic heating device, temperature control device; The potassium sulfate Mannheim furnace body comprises a combustion chamber, wherein the combustion chamber has an air inlet and an air return port; The electromagnetic heating device comprises: a base, a heating air supply pipe, an electromagnetic coil, and a blower; the heating air supply pipe is installed on the base, the electromagnetic coil is wound around the heating air supply pipe, the heating air supply pipe and the air inlet and return air outlet of the combustion chamber form a heating circulation channel, and the blower causes the airflow in the heating circulation channel to circulate back and forth; The temperature control device is used to control the temperature of the air flow in the heating air supply pipe.

2. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device according to claim 1 is characterized in that: The heating air supply pipe comprises: a spirally wound pipe and an air flow return pipe; the spirally wound pipe is wound in a spiral manner to obtain a through hollow chamber, and the spirally wound pipe has an air inlet nozzle and an air outlet nozzle, and the air inlet nozzle and the air outlet nozzle are respectively located at the two end surfaces of the hollow chamber; One end of the airflow return pipe is connected to the air outlet nozzle, and the other end of the airflow return pipe is connected to an end surface of the hollow chamber located at the air inlet nozzle; The hollow chamber is located at one end surface of the air outlet nozzle and is connected to the air inlet of the combustion chamber, and the return air port of the combustion chamber is connected to the air inlet nozzle through the blower; The spirally wound tube forms a plurality of winding connection layers, and the connection between the plurality of winding connection layers forms a through spiral waterway, and the spiral waterway has a water inlet and a water outlet; The temperature control device includes: a water tower, a water pump, a water inlet pipe, and a return pipe; the water tower and the water inlet are connected via the water inlet pipe, the water outlet and the water tower are connected via the return pipe, a water circulation channel is formed between the water tower, the water inlet pipe, the spiral waterway, and the return pipe, and the water pump is used to make the water in the water circulation channel circulate back and forth.

3. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on the electromagnetic heating device according to claim 2 is characterized in that: The electromagnetic heating device further comprises an inner cylinder, which is disposed in the hollow chamber, and an annular air passage with an annular cross section is formed between the inner cylinder and the cavity wall of the hollow chamber.

4. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on electromagnetic heating device according to claim 3 is characterized in that: The annular air passage extends straightly from one end of the hollow chamber to the other end, and a turbofan is arranged in the annular air passage.

5. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on electromagnetic heating device according to claim 2 is characterized in that: The wall of the spirally wound tube is provided with a groove, and the groove is located between a plurality of the wound connection layers. The plurality of the wound connection layers are welded to each other to seal the groove, and the grooves in each of the wound connection layers are interconnected to form the spiral waterway.

6. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on an electromagnetic heating device according to claim 1, characterized in that: There are multiple electromagnetic heating devices, and the multiple electromagnetic heating devices are arranged around the potassium sulfate Mannheim furnace body; each electromagnetic heating device is independently equipped with a set of temperature control devices.

7. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on electromagnetic heating device according to claim 6 is characterized in that: The number of the electromagnetic heating devices is four, and the power of each electromagnetic heating device is 120KW.

8. The energy-saving and environment-friendly potassium sulfate Mannheim furnace based on electromagnetic heating device according to claim 2 is characterized in that: The outer side wall of the spirally wound tube is covered with a heat-insulating layer.

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