Waste heat utilization device for sludge heat drying

Abstract

The utility model discloses a waste heat utilization device for sludge heat drying, which relates to the technical field of sludge treatment and comprises a heat exchange box, an exhaust gas pipeline, a preheating pipeline and a heat exchange water pipeline, the heat exchange box is of an up-down hollow structure, a heat exchange water tank is arranged on the upper side of the heat exchange box, a gas output box is arranged on the lower side of the heat exchange box, and the gas output box is provided with three compartments. The exhaust gas pipeline and the preheating pipeline are arranged in the heat exchange water tank and are respectively communicated to each compartment of the gas output tank, and the heat exchange water pipeline is communicated with the heat exchange water tank. According to the utility model, the heat of exhaust gas generated after heat drying of sludge is reasonably utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a waste heat utilization device for sludge thermal drying. Background Art

[0002] The moisture content of sludge after mechanical dehydration is still above 78%. Sludge thermal drying can further remove the moisture in the dehydrated sludge and reduce the sludge volume through the heat transfer between the sludge and the heat medium. After drying, the odor, pathogens, viscosity, instability, etc. of the sludge are significantly improved. It can be used as a fertilizer, soil conditioner, building material, landfill, alternative energy, or converted into oil and gas and then further refined into chemical products. The thermal drying process should be combined with the utilization of waste heat, and it is not advisable to set up a separate thermal drying process. The biogas heat generated during the anaerobic digestion of sludge, the waste heat from the incineration of garbage and sludge, the waste heat from thermal power plants or other waste heat can be fully utilized to dry the sludge.

[0003] As a byproduct of wet sludge drying, exhaust gas usually has a high temperature and needs to be cooled, deodorized and other technical treatments to meet the requirements for air discharge. The cooling of exhaust gas is generally achieved through a condenser. A large amount of high-temperature exhaust gas itself has a considerable total amount of thermal energy. Cooling it not only increases the energy consumption of the condenser, but also wastes thermal energy. Utility Model Content

[0004] Based on the above-mentioned problems existing in the prior art, the purpose of an embodiment of the present application is to provide a waste heat utilization device for sludge thermal drying, including a heat exchange box, an exhaust gas pipeline, a preheating pipeline and a hot water exchange pipeline, wherein the heat exchange box is a hollow structure with an upper and lower structure, the upper side is a hot water exchange tank, and the lower side is a gas output box, and the gas output box is provided with three compartments, the exhaust gas pipeline and the preheating pipeline are arranged in the hot water exchange tank and are respectively connected to each compartment of the gas output box, and the hot water exchange pipeline is connected to the hot water exchange tank.

[0005] Furthermore, the exhaust gas pipeline includes an air pump 1, an exhaust gas main pipe, three exhaust gas output pipes and three output pumps 1, wherein the exhaust gas main pipe inlet is connected to the output end of the air pump 1, the three exhaust gas output pipe inlets are connected to the exhaust gas main pipe, and the outlets are respectively connected to the corresponding compartments, and the three output pumps 1 are arranged on the corresponding exhaust gas output pipes.

[0006] Furthermore, the preheating pipeline includes air pump 2, a preheating main pipe, three preheating gas output pipes and three output pumps 2, wherein the inlet of the preheating main pipe is connected to the output end of air pump 2, the inlets of the three preheating gas output pipes are connected to the preheating main pipe, and the outlets are respectively connected to the corresponding compartments, and the three output pumps 2 are arranged on the corresponding preheating gas output pipes.

[0007] Furthermore, a temperature measuring device is provided in the water exchange tank, and the temperature measuring device is preferably but not limited to a thermocouple.

[0008] Furthermore, the hot water pipeline includes a water tank, an input water pump and an output water pump, wherein the input water pump and the output water pump are respectively connected to the water tank and the heat exchange water tank.

[0009] Furthermore, each compartment of the gas output box is provided with a fan and a filter.

[0010] Compared with the prior art, the beneficial effect achieved by the utility model is that by providing a heat exchange water tank, the heat of high-temperature exhaust gas can be absorbed and used to preheat normal-temperature gas, which can be used for other equipment such as dryers that require gas at a certain temperature, thereby rationally utilizing the thermal energy of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a partial schematic diagram of the utility model;

[0014] Figure 3 It is a front view of the utility model;

[0015] Among them, the reference numerals in the figure are: 1. heat exchange box; 11. temperature measuring equipment; 2. exhaust gas pipeline; 21. air pump 1; 22. exhaust gas main pipe; 23. exhaust gas output pipe; 24. output pump 1; 3. preheating pipeline; 31. air pump 2; 32. preheating main pipe; 33. preheating gas output pipe; 34. output pump 2; 4. hot water exchange pipe; 41. water tank; 42. input water pump; 43. output water pump. DETAILED DESCRIPTION

[0016] Now, the present application will be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present application in a schematic manner, and therefore only shows the components related to the present application.

[0017] like Figures 1 to 3 As shown, the present application provides a waste heat utilization device for sludge thermal drying, including a heat exchange box 1, an exhaust gas pipeline 2, a preheating pipeline 3 and a hot water exchange pipeline 4, wherein the heat exchange box 1 is a hollow structure with an upper and lower portion, the upper side being a hot water exchange tank, and the lower side being a gas output box, the gas output box being provided with three compartments, the exhaust gas pipeline 2 and the preheating pipeline 3 being arranged in the hot water exchange tank and being respectively connected to each compartment of the gas output box, and the hot water exchange pipeline 4 being connected to the hot water exchange tank.

[0018] The exhaust gas pipeline 2 includes an air pump 21, an exhaust gas main pipe 22, three exhaust gas output pipes 23 and three output pumps 24, wherein the inlet of the exhaust gas main pipe 22 is connected to the output end of the air pump 21, the inlets of the three exhaust gas output pipes 23 are connected to the exhaust gas main pipe 22, and the outlets are respectively connected to the corresponding compartments, and the three output pumps 24 are arranged on the corresponding exhaust gas output pipes 23.

[0019] The preheating pipeline 3 includes an air pump 2 31, a preheating main pipe 32, three preheating gas output pipes 33 and three output pumps 2 34, wherein the inlet of the preheating main pipe 32 is connected to the output end of the air pump 2 31, the inlets of the three preheating gas output pipes 33 are connected to the preheating main pipe 32, and the outlets are respectively connected to the corresponding compartments, and the three output pumps 2 34 are arranged on the corresponding preheating gas output pipes 33.

[0020] A temperature measuring device 11 is provided in the water exchange tank, and the temperature measuring device is preferably but not limited to a thermocouple.

[0021] The hot water pipeline 4 includes a water tank 41, an input water pump 42 and an output water pump 43, wherein the input water pump 42 and the output water pump 43 are connected to the water tank 41 and the heat exchange water tank respectively.

[0022] Each compartment of the gas output box is provided with a fan and a filter.

[0023] Working principle: the input water pump 42 draws a fixed amount of low-temperature water from the water tank 41 to fill the heat exchange water tank, the air pump 1 21 transports the high-temperature exhaust gas produced by the sludge thermal drying to the exhaust gas main pipe 22 to heat the water in the heat exchange water tank, and after the temperature measuring device 11 detects that the water in the heat exchange water tank is heated to a suitable temperature, the air pump 2 31 draws normal temperature gas into the preheating main pipe 32 for preheating, and opens the corresponding output pump 1 24 and output pump 2 34 according to actual needs.

[0024] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Based on the above ideal embodiments of the present application, the relevant staff can make various changes and modifications without departing from the scope of the present application through the above description. The technical scope of this application is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A waste heat utilization device for sludge thermal drying, characterized in that: include: A heat exchange box (1), an exhaust gas pipeline (2), a preheating pipeline (3) and a hot water exchange pipeline (4), wherein the heat exchange box (1) is a hollow structure with an upper and a lower portion, the upper portion being a hot water exchange box and the lower portion being a gas output box, the gas output box being provided with three compartments, the exhaust gas pipeline (2) and the preheating pipeline (3) being provided in the hot water exchange box and being respectively connected to the compartments of the gas output box, and the hot water exchange pipeline (4) being connected to the hot water exchange box.

2. The waste heat utilization device for sludge thermal drying according to claim 1, characterized in that: The exhaust gas pipeline (2) comprises an air pump (21), an exhaust gas main pipe (22), three exhaust gas output pipes (23) and three output pumps (24), wherein the exhaust gas main pipe (22) has an inlet connected to the output end of the air pump (21), the three exhaust gas output pipes (23) have inlets connected to the exhaust gas main pipe (22), and the outlets are respectively connected to corresponding compartments, and the three output pumps (24) are arranged on the corresponding exhaust gas output pipes (23).

3. The waste heat utilization device for sludge thermal drying according to claim 2, characterized in that: The preheating pipeline (3) comprises an air pump 2 (31), a preheating main pipe (32), three preheating gas output pipes (33) and three output pumps 2 (34), wherein the inlet of the preheating main pipe (32) is connected to the output end of the air pump 2 (31), the inlets of the three preheating gas output pipes (33) are connected to the preheating main pipe (32), and the outlets are respectively connected to the corresponding compartments, and the three output pumps 2 (34) are arranged on the corresponding preheating gas output pipes (33).

4. The waste heat utilization device for sludge thermal drying according to claim 3 is characterized in that: A temperature measuring device (11) is provided in the water exchange tank.

5. The waste heat utilization device for sludge thermal drying according to claim 4, characterized in that: The hot water pipeline (4) comprises a water tank (41), an input water pump (42) and an output water pump (43), wherein the input water pump (42) and the output water pump (43) are respectively connected to the water tank (41) and the heat exchange water tank.

6. The waste heat utilization device for sludge thermal drying according to claim 5, characterized in that: Each compartment of the gas output box is provided with a fan and a filter.

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