Waste heat utilization system for oily sludge treatment
By designing a waste heat utilization system and drying and desulfurizing the oil-containing sludge using multiple heat exchanges, the problems of low energy utilization and high cost during the pyrolysis process in the prior art are solved, and efficient energy utilization and cost are achieved reduce.
Patent Information
- Application Number
- CN202421051281.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-15
AI Technical Summary
In the existing oil-containing sludge treatment technology, the energy utilization rate and high cost during the pyrolysis process are problematic.
A waste heat utilization system is designed, including a pyrolysis furnace, combustion heating chamber, sleeve, heat exchange pipe, spiral conveying structure, desulfurization tower and cooling water tank. Through the heat of combustion flue gas, the heat exchange and utilization are achieved. The drying and desulfurization treatment of oil-containing sludge improves energy utilization efficiency.
It improves the heat energy recovery and utilization rate, reduces the treatment cost, realizes efficient utilization of combustion waste heat, improves energy efficiency, and saves resources.
Smart Images
Figure CN222293881U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oily sludge treatment, in particular to a waste heat utilization system for oily sludge treatment. Background Art
[0002] Thermal desorption is one of the methods for treating oily sludge. It mainly refers to the process of volatilizing organic pollutants and metallic mercury in contaminated soil by direct or indirect heat exchange, and effectively collecting and treating the volatilized pollutants. The overall steps include pyrolysis of oily sludge, condensation of pyrolysis gas to obtain condensable gas, non-condensable gas and solid products, and the treatment of oily sludge is completed by treating the three separately. However, in the above treatment method, the oily sludge needs to be heated to 350-550℃ during the pyrolysis process, and heat is directly lost during the heating process, resulting in low energy utilization and high cost. Utility Model Content
[0003] The purpose of the utility model is to provide a waste heat utilization system for oily sludge treatment that can improve heat recovery and utilization, improve energy utilization and reduce costs in view of the shortcomings of the above-mentioned background technology.
[0004] In order to achieve the above-mentioned purpose, the utility model is a waste heat utilization system for oily sludge treatment, which adopts the following technical solutions:
[0005] A waste heat utilization system for treating oily sludge comprises a pyrolysis furnace, a combustion and heating chamber is arranged outside the pyrolysis furnace, a sleeve is arranged on the upper part of the combustion and heating chamber, a vent is arranged between the sleeve and the combustion and heating chamber, a heat exchange tube is arranged on the inner side of the sleeve, both ends of the heat exchange tube pass through the upper end surface of the sleeve, a spiral conveying structure is also arranged on one side of the pyrolysis furnace, one end of the heat exchange tube is connected to a blower, and the other end is connected to the spiral conveying structure, an air outlet is arranged on the spiral conveying structure, the upper end of the sleeve is also connected to a desulfurization tower, a desulfurization agent spraying structure is arranged in the desulfurization tower, the desulfurization agent spraying structure is connected to a desulfurization agent box, a second heat exchange tube is arranged in the desulfurization agent box, one end of the second heat exchange tube is connected to the air outlet, and the other end is connected to a cooling structure.
[0006] A further improvement of the waste heat utilization system for treating oily sludge in the utility model is that a pretreatment box is provided between the desulfurization tower and the combustion heating chamber, a plurality of third heat exchange tubes are provided in the pretreatment box, one end of the third heat exchange tube is connected to the sleeve layer, and the other end is connected to the desulfurization tower, and the pretreatment box contains the oily sludge that has been crushed and preliminarily filtered.
[0007] A further improvement of the waste heat utilization system for treating oily sludge in the utility model is that a plurality of second heat exchange tubes are also arranged vertically, an extension tube is provided downwardly of the second heat exchange tube, the extension tube is also arranged vertically, the middle part of the extension tube is connected to the air outlet, and a valve is provided at the bottom of the extension tube.
[0008] A further improvement of the waste heat utilization system for oily sludge treatment of the utility model is that the lower end of the extension pipe is also connected to a cooling structure, which is a cooling water pool, and the cooling water pool is used for spraying the pyrolysis gas generated by the pyrolysis furnace.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] The utility model utilizes the heat of the gas discharged from the combustion chamber to heat the gas so that it enters the screw conveyor to achieve drying of the oily sludge. The gas after passing through the screw conveyor carries water vapor to further exchange heat with the desulfurizer, which is used for treating the combustion flue gas, thereby achieving efficient utilization of the combustion waste heat as a whole, improving energy efficiency and saving resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the structure of the utility model;
[0012] In the figure: 1 pyrolysis furnace, 2 combustion heating chamber, 3 jacket layer, 4 heat exchange tube, 5 spiral conveying structure, 6 gas outlet, 7 extension tube, 8 desulfurizer box, 9 second heat exchange tube, 10 desulfurization tower, 11 pretreatment box, 12 third heat exchange tube. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] like Figure 1As shown, a waste heat utilization system for oily sludge treatment includes a pyrolysis furnace 1, a combustion heating chamber 2 is provided outside the pyrolysis furnace, a jacket 3 is provided on the upper part of the combustion heating chamber, a vent is provided between the jacket and the combustion heating chamber, a heat exchange tube 4 is provided inside the jacket, and both ends of the heat exchange tube pass through the upper end surface of the combustion jacket. A spiral conveying structure 5 is also provided on one side of the pyrolysis furnace, one end of the heat exchange tube is connected to the blower, and the other end is connected to the spiral conveying structure, and the heat exchange tube is in a spiral ring shape. An air outlet 6 is provided on the spiral conveying structure, and the upper end of the jacket is also connected to a desulfurization tower 10, a desulfurization agent spraying structure is provided in the desulfurization tower, and the desulfurization agent spraying structure is connected to a desulfurization agent box 8, and a second heat exchange tube 9 is provided in the desulfurization agent box, and one end of the second heat exchange tube is connected to the air outlet, and the other end is connected to the cooling structure.
[0015] Furthermore, a pretreatment box 11 is provided between the desulfurization tower and the jacket layer, and a plurality of third heat exchange tubes 12 are provided in the pretreatment box, one end of the third heat exchange tube is connected to the jacket layer, and the other end is connected to the desulfurization tower. The pretreatment box contains the oily sludge after crushing and preliminary filtration. The combustion flue gas further transfers heat in the process of entering the treatment tower, which reduces the temperature entering the treatment tower and also increases the temperature of the oily sludge.
[0016] Furthermore, a plurality of second heat exchange tubes are arranged vertically, and an extension tube 7 is arranged downwardly from the second heat exchange tube, and the extension tube is also arranged vertically, and the middle of the extension tube is connected to the gas outlet, and a valve is arranged at the bottom of the extension tube. The lower end of the extension tube is also connected to a cooling structure, which is a cooling water pool, and the cooling water pool is used to spray the pyrolysis gas generated by the pyrolysis furnace.
[0017] The working principle of the utility model is as follows: combustion in the combustion chamber heats the pyrolysis furnace to achieve heating and pyrolysis of the oil-containing sludge in the furnace, the flue gas generated by the combustion enters the jacket layer, and exchanges heat with the air in the heat exchange tube in the jacket layer, and after the heat exchange, the high-temperature hot gas enters the screw conveyor to dry the oil-containing sludge, and a heating structure can also be added to the outside of the screw conveyor to ensure the drying process, the hot gas and the water vapor it carries pass through the desulfurizer box to preheat the desulfurizer in the box to improve the desulfurization treatment effect of the combustion flue gas, and the water formed by part of the heat exchange cooling is regularly discharged from the extension pipe into the cooling water pool, and the hot gas passing through the desulfurization box also enters the cooling water pool for spraying the pyrolysis gas, on the other hand, after the combustion flue gas exchanges heat with the air through the heat exchange tube, it heats the oil-containing sludge in the pretreatment box, further improving the subsequent drying of the oil-containing sludge, and the combustion flue gas as a whole enters the desulfurization tower for desulfurization treatment.
[0018] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A waste heat utilization system for oily sludge treatment, characterized in that: It includes a pyrolysis furnace, a combustion heating chamber is arranged outside the pyrolysis furnace, a sleeve is arranged on the upper part of the combustion heating chamber, a vent is arranged between the sleeve and the combustion heating chamber, a heat exchange pipe is arranged on the inner side of the sleeve, both ends of the heat exchange pipe pass through the upper end surface of the sleeve, a spiral conveying structure is also arranged on one side of the pyrolysis furnace, one end of the heat exchange pipe is connected to the blower, and the other end is connected to the spiral conveying structure, an air outlet is arranged on the spiral conveying structure, the upper end of the sleeve is also connected to a desulfurization tower, a desulfurization agent spraying structure is arranged in the desulfurization tower, the desulfurization agent spraying structure is connected to the desulfurization agent box, a second heat exchange pipe is arranged in the desulfurization agent box, one end of the second heat exchange pipe is connected to the air outlet, and the other end is connected to the cooling structure.
2. The waste heat utilization system for oily sludge treatment according to claim 1 is characterized in that: A pretreatment box is also provided between the desulfurization tower and the jacket layer. A plurality of third heat exchange tubes are provided in the pretreatment box. One end of the third heat exchange tube is connected to the jacket layer and the other end is connected to the desulfurization tower. The pretreatment box contains crushed and preliminarily filtered oily sludge.
3. The waste heat utilization system for oily sludge treatment according to claim 1 is characterized in that: There are also multiple second heat exchange tubes, all arranged vertically. An extension tube is arranged downwardly from the second heat exchange tube, and the extension tube is also arranged vertically. The middle of the extension tube is connected to the air outlet, and a valve is provided at the bottom of the extension tube.
4. The waste heat utilization system for oily sludge treatment according to claim 3 is characterized in that: The lower end of the extension pipe is also connected to a cooling structure, which is a cooling water pool. The cooling water pool is used for spraying the pyrolysis gas generated by the pyrolysis furnace.