Formaldehyde waste heat boiler

Abstract

The utility model discloses a formaldehyde waste heat boiler which comprises a cylinder body, one end of the cylinder body is provided with a smoke inlet allowing formaldehyde reaction gas to enter, the other end of the cylinder body is provided with a smoke outlet allowing the formaldehyde reaction gas to flow out, and a plurality of tube bundles matched with the formaldehyde reaction gas are arranged in the cylinder body. The tube bundles are transversely arranged in the cylinder body at intervals, the side part of the cylinder body is provided with a downcomer for water vapor to enter the cylinder body and react with formaldehyde reaction gas in the cylinder body, and the side part of the cylinder body is also provided with an ascending tube for discharging the water vapor. The heat exchanger has the advantages that the structure is simple, the heat transfer efficiency can be improved through the pipe bundles, the heat transfer efficiency can be improved through the insertion pieces, sewage can be discharged, and therefore potential safety hazards are avoided.

Description

Technical Field

[0001] This utility model relates to the field of industrial reaction equipment technology, and in particular to a formaldehyde waste heat boiler. Background Technology

[0002] Formaldehyde is a versatile chemical product used in coatings, paints, synthetic resins, and wood processing. Industrially, formaldehyde is typically produced through oxidation, using it as a raw material. The waste gas emitted during formaldehyde production is called formaldehyde tail gas, which contains large amounts of flammable gases such as carbon monoxide, methane, and formaldehyde. Formaldehyde tail gas production is substantial; approximately 600 cubic meters of tail gas are generated for every ton of formaldehyde produced. The release of these large quantities of flammable gases into the atmosphere not only wastes resources but also causes serious air pollution and harm.

[0003] Currently, formaldehyde reactive gases are treated by boiler combustion. However, current boilers have complex structures, high costs, and low heat transfer efficiency. Furthermore, when steam is added into the boiler for heat exchange, the inability to discharge wastewater from the boiler results in poor safety performance and potential safety hazards.

[0004] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a formaldehyde waste heat boiler to address the above-mentioned shortcomings and defects of the existing technology.

[0006] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0007] A formaldehyde waste heat boiler, characterized in that it includes a cylindrical body, one end of which is provided with a flue gas inlet for formaldehyde reaction gas to enter, and the other end of which is provided with a flue gas outlet for formaldehyde reaction gas to flow out. The interior of the cylindrical body is provided with a plurality of tube bundles that cooperate with the formaldehyde reaction gas, each tube bundle being laterally spaced within the cylindrical body. A downcomer is provided on the side of the cylindrical body for water vapor to enter and react with the formaldehyde reaction gas present in the cylindrical body. An upcomer is also provided on the side of the cylindrical body for water vapor to be discharged.

[0008] In a preferred embodiment of the present invention, the interior of the cylinder is further provided with a number of inserts for enhancing heat transfer efficiency, each insert being vertically spaced inside the cylinder and welded to the cylinder.

[0009] In a preferred embodiment of this utility model, the cylinder is further provided with a drain outlet for discharging sewage.

[0010] In a preferred embodiment of this utility model, the cylinder is further provided with a drain pipe for discharging waste.

[0011] In a preferred embodiment of this utility model, the cylinder is further provided with a maintenance pipe for convenient repair or equipment maintenance.

[0012] In a preferred embodiment of this utility model, a temperature measuring port for monitoring temperature is provided at the smoke outlet.

[0013] In a preferred embodiment of the present invention, one end of the cylinder is provided with a front end cap and a front tube plate provided at the smoke inlet, and the other end of the cylinder is provided with a rear tube plate located at the smoke outlet.

[0014] In a preferred embodiment of this utility model, the side of the cylinder is provided with lifting lugs for easy lifting.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: the structure of this utility model is simple, and the heat transfer efficiency can be improved by several tube bundles. Furthermore, the heat transfer efficiency can be improved by the addition of inserts, and sewage can be discharged, thereby avoiding potential safety hazards. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a side view of the present invention. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0020] See Figures 1 to 2The formaldehyde waste heat boiler shown includes a cylindrical body 10. One end of the cylindrical body 10 has a flue gas inlet 20 for formaldehyde reaction gas to enter, and the other end has a flue gas outlet 30 for formaldehyde reaction gas to exit. Inside the cylindrical body 10 are several tube bundles 40 that interact with the formaldehyde reaction gas. Each tube bundle 40 is laterally spaced inside the cylindrical body 10. A downcomer 50 is provided on the side of the cylindrical body 10 for water vapor to enter and react with the formaldehyde reaction gas present in the cylindrical body 10. An ascender 60 is also provided on the side of the cylindrical body 10 for discharging water vapor. In this embodiment, there are two downcomers 50, symmetrically arranged on both sides of the cylindrical body 10, and two ascender 60s, arranged vertically on the same side of the cylindrical body 10.

[0021] To enhance heat transfer efficiency, a plurality of inserts 70 are provided inside the cylinder 10. Each insert 70 is vertically spaced inside the cylinder 10 and welded to the cylinder 10. In this embodiment, the plurality of inserts 70 includes a first insert 71, a second insert 72, and a third insert 73, which are arranged sequentially from the direction of the flue gas inlet to the direction of the flue gas outlet.

[0022] In order to discharge the sewage inside the cylinder, a drain outlet 80 is also provided on the cylinder 10. In this embodiment, there are four drain outlets 80.

[0023] In order to discharge the sludge inside the cylinder, a drain pipe 90 is also installed on the cylinder 10.

[0024] To facilitate the maintenance of the equipment inside the cylinder, a maintenance pipe 100 is also installed on the cylinder 10.

[0025] A temperature measuring port 110 is installed at the smoke outlet to monitor the temperature of the smoke outlet.

[0026] One end of the cylinder 10 is provided with a front end cap 11 and a front tube plate 12 located at the smoke inlet 20, and the other end of the cylinder 10 is provided with a rear tube plate 13 located at the smoke outlet 30. In this embodiment, the front end cap 11 is used to prevent other impurities from entering the cylinder 10, while the front tube plate 12 is used to fix the smoke inlet 20. Similarly, the rear tube plate 13 is used to fix the smoke outlet 30.

[0027] To facilitate lifting the cylinder, a lifting lug 120 is provided on the side of the cylinder 10.

[0028] When this utility model is in use, the formaldehyde reaction gas enters the tube bundle 40 of the cylinder 10 through the smoke inlet 20 at the left end and flows out through the smoke outlet 30 at the right end. Meanwhile, water vapor flows into the cylinder 10 through the downcomer 50 located on the side of the smoke outlet 30 and flows out through the riser 60 located on the other side of the cylinder 10. Due to the temperature difference between the formaldehyde reaction gas in the tube bundle 40 and the water vapor in the cylinder 10, heat exchange occurs, which is a physical thermal equilibrium. The heat of a high-temperature object always transfers to a low-temperature object. In this way, the heat of the formaldehyde reaction gas in the tube bundle 40 is exchanged with the water vapor in the cylinder 10, realizing the utilization of waste heat. The insert 70 inside the cylinder 10 enhances the heat transfer efficiency, and the wastewater inside the cylinder 10 can flow out through the drain outlet 80.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A formaldehyde waste heat boiler, characterized in that, The device includes a cylindrical body, one end of which is provided with a smoke inlet for formaldehyde reaction gas to enter, and the other end of which is provided with a smoke outlet for formaldehyde reaction gas to flow out. Inside the cylindrical body, there are several tube bundles that cooperate with the formaldehyde reaction gas, each tube bundle being arranged laterally at intervals inside the cylindrical body. A downcomer is provided on the side of the cylindrical body for water vapor to enter the cylindrical body and react with the formaldehyde reaction gas present in the cylindrical body. An upcomer is also provided on the side of the cylindrical body for water vapor to be discharged.

2. The formaldehyde waste heat boiler according to claim 1, characterized in that, The interior of the cylinder is also provided with several inserts to enhance heat transfer efficiency. Each insert is vertically spaced inside the cylinder and welded to the cylinder.

3. The formaldehyde waste heat boiler according to claim 1, characterized in that, The cylinder is also equipped with a drain outlet for discharging wastewater.

4. A formaldehyde waste heat boiler according to claim 1, characterized in that, The cylinder is also equipped with a drain pipe to discharge waste.

5. A formaldehyde waste heat boiler according to claim 1, characterized in that, The cylinder is also equipped with a maintenance pipe for easy repair or equipment maintenance.

6. A formaldehyde waste heat boiler according to claim 1, characterized in that, A temperature measuring port for monitoring temperature is provided at the smoke outlet.

7. A formaldehyde waste heat boiler according to claim 1, characterized in that, One end of the cylinder is provided with a front end cap and a front tube plate located at the smoke inlet, and the other end of the cylinder is provided with a rear tube plate located at the smoke outlet.

8. A formaldehyde waste heat boiler according to claim 1, characterized in that, The side of the cylinder is provided with lifting lugs for easy lifting.

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