Waste gas treatment device for submerged combustion furnace

Abstract

The present application relates to the technical field related to submerged combustion, and discloses an exhaust gas treatment device for an submerged combustion furnace. In order to provide a new dust screening method, the exhaust gas generated by the combustion furnace is cooled by a water medium in a heat exchange chamber, and the water vapor generated by the water medium in the heat exchange chamber and the flue gas containing small particles of dust are input into a cooling pipe together. After the high-temperature airflow is cooled from the cooling pipe, the water vapor is liquefied into water and attached to the small particles of smoke. The water medium containing the small particles of smoke will not be discharged with the smoke, thereby realizing the purification of small particles in the smoke.

Description

Technical Field

[0001] The present application relates to the technical field related to submerged combustion, and in particular to an exhaust gas treatment device for a submerged combustion furnace. Background Art

[0002] Immersed burner is a combustion technology, also known as liquid combustion method, which is a process of fully mixing gas and air and sending them into the combustion chamber for stable combustion.

[0003] During the operation of the burner, small particles of waste will exist in the flue gas generated and will be discharged from the chimney along with the flue gas. Although the small particles in the flue gas can be filtered out by a filter, the clogging of the filter will be aggravated during the filtration, thereby greatly increasing the cost of the filter consumables. Therefore, a low-cost flue gas purification method that does not require consumables is needed. Summary of the invention

[0004] The present application proposes an exhaust gas treatment device for an immersed combustion furnace, which has the advantage of being able to screen out small particles in the flue gas without filtering, and is used to solve the problem of increased costs caused by filtering small particles with a filter net proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an exhaust gas treatment device for an submerged combustion furnace, comprising: a treatment tank, which is provided with a heat exchange chamber for storing a water medium, an exhaust gas inlet pipe is fixedly installed on the outside of the treatment tank, and a cooling ring pipe located in the heat exchange chamber is fixedly installed at the end of the exhaust gas inlet pipe, and an exhaust pipe is fixedly installed on the surface of the cooling ring pipe; an air collecting hood is fixedly installed at the end of the treatment tank, and an air supply pipe is fixedly installed on the top of the air collecting hood, a cooling pipe is fixedly installed at the end of the air supply pipe, and an exhaust gas exhaust pipe is fixedly installed at the end of the cooling pipe; water vapor and smoke are mixed and flow into the cooling pipe, so that the water vapor is liquefied and attached to small particles, so that the small particles are screened out.

[0006] Furthermore, the cooling tube is a hollow spiral tube.

[0007] Furthermore, a liquid replenishing tank is fixedly installed on one side of the processing tank, and a liquid collecting cavity opening upward is opened on the surface of the liquid replenishing tank, and the liquid collecting cavity is located below the cooling pipe. The bottom end of the cooling pipe is fixedly connected with a liquid collecting pipe, and the liquid collecting pipe is located in the liquid collecting cavity.

[0008] Furthermore, a drainage protrusion located above the liquid collecting pipe is fixedly installed on the inner bottom of the cooling pipe, and the cross-sectional shape of the drainage protrusion is semicircular.

[0009] Furthermore, a one-way liquid valve is provided between the heat exchange chamber and the liquid collecting chamber, and the one-way liquid valve enables one-way flow of the medium in the liquid collecting chamber into the heat exchange chamber.

[0010] Furthermore, a dirt storage bottom plate is movably sleeved on the inner bottom of the treatment tank, and a detection spring is fixedly connected to the bottom end of the dirt storage bottom plate. A sewage discharge pipe communicating with the heat exchange chamber is provided on the side wall of the treatment tank.

[0011] Furthermore, a partition for blocking the one-way liquid valve is movably installed inside the processing tank, and a flow hole for connecting the one-way liquid valve is opened on the outside of the partition, and a floating block is fixedly installed on the top of the partition.

[0012] The present invention has the following beneficial effects:

[0013] The present application provides an exhaust gas treatment device for an submerged combustion furnace. The exhaust gas generated by the combustion furnace is cooled by a water medium in a heat exchange chamber. The water vapor generated by the water medium in the heat exchange chamber and the flue gas containing small particles of dust are input into a cooling pipe together. After the high-temperature airflow is cooled from the cooling pipe, the water vapor liquefies into water and adheres to the small particles of smoke. The water medium containing the small particles of smoke will not be discharged with the smoke, thereby achieving the purification of small particles in the smoke.

[0014] At the same time, the water medium containing small particles of dust is transported to the heat exchange chamber. On the one hand, the medium in the heat exchange chamber is replenished. On the other hand, the water will evaporate as the temperature rises, thereby separating the water and small particles of dust, thereby retaining the small particles of dust in the heat exchange chamber, making it easy to uniformly treat the dust later.

[0015] In the present application, for the treatment of small dust particles, the small particles can be screened out without filtering them, thereby reducing the use cost of the filter element and ultimately achieving the purpose of low-cost flue gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0017] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0018] Figure 1 This is the overall appearance structure diagram;

[0019] Figure 2 This is the overall internal three-dimensional structure diagram;

[0020] Figure 3 It is the overall front sectional view;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0022] In the figure: 1, treatment tank; 100, heat exchange chamber; 2, drain pipe; 3, exhaust gas inlet pipe; 4, gas collecting hood; 5, gas pipe; 6, cooling pipe; 7, exhaust gas discharge pipe; 8, liquid collecting pipe; 9, liquid replenishment tank; 900, liquid collecting chamber; 10, cooling ring pipe; 11, exhaust pipe; 12, one-way liquid valve; 13, partition; 130, flow hole; 131, float; 14, detection spring; 15, dirt storage bottom plate; 16, drainage bump. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1

[0024] See also Figure 1-Figure 2 A heat exchange chamber 100 for storing a liquid medium is provided inside the treatment tank 1, and the liquid medium is preferably water. A waste gas inlet pipe 3 is fixedly installed on the outside of the treatment tank 1, and the waste gas inlet pipe 3 is connected to the exhaust end of the combustion furnace. A cooling ring pipe 10 located in the heat exchange chamber 100 is fixedly installed at the end of the waste gas inlet pipe 3, and an exhaust pipe 11 is fixedly installed on the surface of the cooling ring pipe 10. The height of the liquid in the heat exchange chamber 100 is higher than the cooling ring pipe 10 but does not exceed the exhaust pipe 11. The high-temperature flue gas in the waste gas inlet pipe 3 is cooled by the liquid medium in the heat exchange chamber 100.

[0025] A gas collecting hood 4 is fixedly installed at the end of the processing tank 1, and the gas discharged from the exhaust pipe 11 is gathered through the gas collecting hood 4. An air supply pipe 5 is fixedly installed on the top of the gas collecting hood 4 to realize the transmission of the airflow discharged from the exhaust pipe 11 to the air supply pipe 5. A cooling pipe 6 is fixedly installed at the end of the air supply pipe 5, and the cooling pipe 6 is a hollow spiral tube. An exhaust gas exhaust pipe 7 is fixedly installed at the end of the cooling pipe 6, and the purified gas can be discharged to the outside through the exhaust gas exhaust pipe 7.

[0026] When in use, a proper amount of water medium is added to the heat exchange chamber 100. When the flue gas is transported from the cooling loop 10, the water medium in the heat exchange chamber 100 will be heated to a boiling state, and the water vapor in the heat exchange chamber 100 will pass through the cooling tube 6 together with the exhaust gas discharged from the exhaust pipe 11. Since the cooling tube 6 will further dissipate the heat of the water vapor and the exhaust gas, the water vapor will liquefy and condense on the small particles of dust, causing the amount of small particles in the airflow output from the cooling tube 6 to be greatly reduced to the limit that can be discharged normally.

[0027] In the present application, liquid cooling in the heat exchange chamber 100 and air cooling in the cooling pipe 6 are combined to ensure that the output flue gas temperature is greatly reduced. Embodiment 2

[0028] On the basis of the first embodiment, in order to realize the collection and reuse of the water droplets in the cooling tube 6, please refer to Figure 2 and Figure 3 A liquid replenishing tank 9 is fixedly installed on one side of the treatment tank 1, and an upwardly open liquid collecting chamber 900 is opened on the surface of the liquid replenishing tank 9. The liquid collecting chamber 900 is located below the cooling tube 6, and a liquid collecting pipe 8 is fixedly connected to the bottom end of the cooling tube 6, and the liquid collecting pipe 8 is located in the liquid collecting chamber 900. When the water droplets generated in the cooling tube 6 pass through the liquid collecting pipe 8, they will flow into the liquid collecting chamber 900 autonomously due to their own gravity, thereby realizing the collection of the water medium.

[0029] In order to ensure that the medium in the cooling tube 6 can be stably input into the collecting tube 8, Figure 4 A drainage protrusion 16 located above the collecting pipe 8 is fixedly installed on the inner bottom of the cooling pipe 6, and the cross-sectional shape of the drainage protrusion 16 is semicircular. Therefore, when the medium is transported to the exhaust gas discharge pipe 7 through the cooling pipe 6, the liquid will first pass through the collecting pipe 8 due to gravity, ensuring that the medium flows normally to the collecting pipe 8.

[0030] Combination Figure 3 It can be seen that a one-way liquid valve 12 is arranged between the heat exchange chamber 100 and the liquid collecting chamber 900, and the one-way liquid valve 12 realizes one-way flow of the medium in the liquid collecting chamber 900 to the heat exchange chamber 100. Since the water medium in the heat exchange chamber 100 is affected by the evaporation of water, the height of its liquid level will continue to decrease. When the liquid level in the heat exchange chamber 100 is lower than the liquid level in the liquid collecting chamber 900, according to the principle of communicating vessels, the one-way liquid valve 12 will be forced to open, causing the medium in the liquid collecting chamber 900 to be replenished into the heat exchange chamber 100, thereby realizing the purpose of reusing the water medium in the liquid collecting chamber 900. Embodiment 3

[0031] Based on Example 2, please refer to Figure 2 and Figure 3A dirt storage bottom plate 15 is movably sleeved on the inner bottom of the treatment tank 1, and a detection spring 14 is fixedly connected to the bottom end of the dirt storage bottom plate 15 and is supported on the inner bottom of the treatment tank 1. A sewage discharge pipe 2 communicating with the heat exchange chamber 100 is opened on the side wall of the treatment tank 1. Therefore, in actual use, when only water medium exists in the heat exchange chamber 100, the elastic force of the detection spring 14 will lift the dirt storage bottom plate 15, and the sewage discharge pipe 2 is isolated from the heat exchange chamber 100 through the dirt storage bottom plate 15. The liquid collecting chamber 900 is replenished with an aqueous medium containing small particles. When the aqueous medium in the heat exchange chamber 100 evaporates, the small particles will remain in the heat exchange chamber 100. As the medium density in the heat exchange chamber 100 continues to increase, the pressure exerted by the heat exchange chamber 100 on the sewage storage bottom plate 15 also continues to increase, until the pressure in the heat exchange chamber 100 is greater than the elastic force of the detection spring 14, which forces the sewage pipe 2 to be connected to the heat exchange chamber 100, thereby discharging the small particles precipitated at the bottom of the heat exchange chamber 100. Embodiment 4

[0032] On the basis of the third embodiment, in order to limit the height of the water medium in the heat exchange chamber 100, please refer to Figure 2 and Figure 3 A partition 13 for blocking the one-way liquid valve 12 is movably installed on the inner side of the treatment tank 1, and a flow hole 130 for connecting the one-way liquid valve 12 is opened on the outer side of the partition 13, and a floating block 131 that can float is fixedly installed on the top of the partition 13. Under normal conditions, the liquid level in the heat exchange chamber 100 will not contact the floating block 131, so that the flow hole 130 always connects the one-way liquid valve 12. When the liquid level in the heat exchange chamber 100 is too high, the floating block 131 will move upward due to buoyancy, thereby pulling the partition 13 to block the one-way liquid valve 12, avoiding the phenomenon that the gravity in the heat exchange chamber 100 increases sharply due to the continuous addition of water medium, thereby preventing the sewage pipe 2 from being opened by mistake.

Claims

1. An exhaust gas treatment device for a submerged combustion furnace, It is characterized in that include: A treatment tank (1) is provided with a heat exchange cavity (100) for storing a water medium therein, an exhaust gas inlet pipe (3) is fixedly mounted on the outside of the treatment tank (1), and a cooling ring pipe (10) located in the heat exchange cavity (100) is fixedly mounted on the end of the exhaust gas inlet pipe (3), and an exhaust pipe (11) is fixedly mounted on the surface of the cooling ring pipe (10); A gas collecting hood (4) is fixedly mounted on the end of the processing tank (1), and a gas delivery pipe (5) is fixedly mounted on the top of the gas collecting hood (4), a cooling pipe (6) is fixedly mounted on the end of the gas delivery pipe (5), and an exhaust gas discharge pipe (7) is fixedly mounted on the end of the cooling pipe (6); The water vapor and smoke are mixed and flow into the cooling pipe (6), so that the water vapor is liquefied and attached to the small particles, so that the small particles are separated; A liquid replenishing tank (9) is fixedly mounted on one side of the treatment tank (1), and a liquid collecting chamber (900) opening upward is provided on the surface of the liquid replenishing tank (9), the liquid collecting chamber (900) is located below the cooling pipe (6), and a liquid collecting pipe (8) is fixedly connected to the bottom end of the cooling pipe (6), and the liquid collecting pipe (8) is located in the liquid collecting chamber (900); A one-way liquid valve (12) is provided between the heat exchange chamber (100) and the liquid collecting chamber (900), and the one-way liquid valve (12) enables one-way flow of the medium in the liquid collecting chamber (900) into the heat exchange chamber (100); The inner bottom of the processing tank (1) is movably sleeved with a dirt storage bottom plate (15), and the bottom end of the dirt storage bottom plate (15) is fixedly connected with a detection spring (14), and the side wall of the processing tank (1) is provided with a dirt discharge pipe (2) communicating with the heat exchange chamber (100); A liquid discharge protrusion (16) located above the liquid collecting pipe (8) is fixedly mounted on the inner bottom of the cooling pipe (6), and the cross-sectional shape of the liquid discharge protrusion (16) is semicircular.

2. The exhaust gas treatment device of the submerged combustion furnace according to claim 1, It is characterized in that The cooling tube (6) is a hollow spiral tube.

3. The exhaust gas treatment device of the submerged combustion furnace according to claim 1, It is characterized in that A partition (13) for blocking the one-way liquid valve (12) is movably mounted on the inner side of the processing tank (1), and a flow hole (130) for connecting the one-way liquid valve (12) is provided on the outer side of the partition (13), and a floating block (131) is fixedly mounted on the top of the partition (13).

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