Flue gas waste heat drying box and drying system

Abstract

The invention provides a flue gas waste heat drying box and a drying system. The flue gas waste heat drying box comprises a heat exchange box and a cart, and the cart is placed in the heat exchange box in an in-out mode; an air inlet is formed in one side of the heat exchange box, an air outlet is formed in the other side of the heat exchange box, a biomass fuel containing cavity is formed in the cart, and the side wall of the cart and the side wall of the biomass fuel containing cavity are both of a ventilation structure. According to the flue gas waste heat recovery device composed of the heat exchange box and the cart, biomass fuel to be dried is mainly contained in the biomass fuel containing cavity formed in the cart, then flue gas is converted into hot air, the hot air enters the heat exchange box through the air inlet, the biomass fuel is dried, and then the biomass fuel is exhausted through the air outlet. According to the flue gas waste heat drying system, manual intervention is not needed in the whole process, and automatic operation of the whole process of wet material feeding, hot air drying and dry material discharging can be achieved. According to the flue gas waste heat recycling system, flue gas waste heat is recycled, and the heat energy utilization efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a flue gas waste heat drying box and a drying system. Background Art

[0002] At present, the waste heat in the flue gas of the biomass boiler is directly discharged into the atmosphere, which will cause heat waste and reduce the energy utilization efficiency. Therefore, the art needs a device for recovering and utilizing the waste heat of the flue gas of the biomass boiler. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a flue gas waste heat drying box and a drying system for recovering waste heat from flue gas of a biomass boiler.

[0004] The present invention provides a flue gas waste heat drying box, comprising: a heat exchange box and a trolley, wherein the trolley can be placed in and out of the heat exchange box; one side of the heat exchange box has an air inlet, and the other side has an air outlet, a biomass fuel containing cavity is installed in the trolley, and the side walls of the trolley and the side walls of the biomass fuel containing cavity are both air-permeable structures.

[0005] Furthermore, the side wall of the heat exchange box has a thermal insulation layer.

[0006] Furthermore, the diameter of the air inlet of the heat exchange box gradually increases along the airflow direction.

[0007] Furthermore, an air distribution plate is provided between the air inlet and the cart.

[0008] Furthermore, a temperature and humidity sensor is provided at the air inlet of the heat exchange box.

[0009] Furthermore, an air outlet duct is provided in the heat exchange box at a position connected to the air outlet.

[0010] Furthermore, the biomass fuel containing chambers are evenly arranged at equal intervals on the cart.

[0011] Furthermore, the biomass fuel containing cavity has a feed port at the upper end and a discharge port at the lower end, and an openable and closable flap is provided at the discharge port.

[0012] Furthermore, one side of the cart has a handle.

[0013] The present invention provides a flue gas waste heat drying system, comprising a flue gas waste heat drying box; further comprising a loading device, a discharging device and an automatic control system; the loading device comprises a ground stacking port, a loading belt and a material cart feeding port connected in sequence; the discharging device comprises a material cart unloading port, a discharging belt and a material bin connected in sequence; wherein the trolley in the flue gas waste heat drying box is arranged to be an automatic material pushing trolley matching the material cart feeding port and the material cart unloading port, and the automatic material pushing trolley reciprocates along a track arranged in a heat exchange box; the automatic control system is connected to the temperature and humidity sensor signal in the flue gas waste heat drying box, and is control-connected to the loading device, the discharging device and the flue gas waste heat drying box; the flue gas waste heat is converted into hot air through a heat exchanger for utilization, and is not in direct contact with the fuel, thereby avoiding contamination of the fuel by components in the flue gas.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The flue gas waste heat drying box of the present invention is a flue gas waste heat recovery device composed of a heat exchange box and a cart. The biomass fuel to be dried is placed in the biomass fuel receiving chamber arranged in the cart, and then hot air enters the heat exchange box through the air inlet to dry the biomass fuel, and then is discharged through the air outlet. The present invention realizes the recovery and utilization of flue gas waste heat and improves the utilization efficiency of thermal energy.

[0016] 2. The flue gas waste heat drying system of the present invention is composed of a material feeding device, a heat exchange box, an automatic material pusher, a discharging device and an automatic control system. The material to be dried is mainly transported to the biomass fuel material containing chamber arranged in the automatic material pusher through the feeding device. The automatic material pusher enters the heat exchange box through the track, and then the hot air enters the heat exchange box through the air inlet and is transported to the heat exchange box to dry the biomass fuel material, and then discharged through the air outlet. A number of temperature and humidity sensors are arranged in the heat exchange box. After the required drying degree of the material is monitored, the cart is sent to the unloading channel through the track, and the cart unloading port is automatically opened. The material falls on the discharging belt and is transported to the storage silo. This process does not require manual intervention, and can realize the automatic operation of the entire process of wet material feeding-hot air drying-dry material discharging. Among them, a weighing device can be provided on the cart track to compare the weight of the material before and after drying, which is used to assist in calculating the drying degree and metering. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural schematic diagram of a flue gas waste heat drying box according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a cart according to an embodiment of the present invention;

[0020] Figure 3 The figure is a schematic diagram of the connection position of the handle of a cart according to an embodiment of the present invention.

[0021] The accompanying drawings are marked as:

[0022] 1: heat exchange box; 11: air inlet; 12: air outlet; 13: insulation layer; 14: air outlet duct; 2: cart; 21: biomass fuel containing chamber; 211: feed inlet; 212: flap; 22: handle; 3: air distribution plate. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, 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 connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1 As shown, an embodiment of the present invention provides a flue gas waste heat drying box, comprising: a heat exchange box 1 and a trolley 2, wherein the trolley 2 can be placed in the heat exchange box 1 in an in-and-out manner; the heat exchange box 1 has an air inlet 11 on one side and an air outlet 12 on the other side, a biomass fuel holding chamber 21 is installed in the trolley 2, and the side walls of the trolley 2 and the side walls of the biomass fuel holding chamber 21 are all air-permeable structures. The present invention is a flue gas waste heat recovery device composed of a heat exchange box 1 and a trolley 2, which mainly contains biomass fuel to be dried in the biomass fuel holding chamber 21 arranged in the trolley, and the flue gas waste heat is converted into hot air through a heat exchanger for utilization, and then the hot air enters the heat exchange box 2 through the air inlet 11 to dry the biomass fuel, and then is discharged through the air outlet 12. The present invention realizes the recovery and utilization of flue gas waste heat and improves the utilization efficiency of thermal energy.

[0027] Among them, a sliding door is provided on one side of the heat exchange box 1, and the size of the sliding door matches the size of the trolley 2, so that the trolley 2 can enter and exit the heat exchange box 1. Preferably, as Figure 3 As shown, a handle 22 is provided on the trolley 2 at a position corresponding to the sliding door.

[0028] In one aspect of the embodiment of the present invention, the side wall of the heat exchange box 1 has a heat-insulating layer 13. The heat-insulating layer 13 is a closed and airtight structure, which can play a role in heat preservation.

[0029] In one aspect of an embodiment of the present invention, the diameter of the air inlet 11 of the heat exchanger box 1 gradually increases along the direction of air flow. And an air distribution plate 3 is provided between the air inlet 11 and the cart 2. This design can make the hot air blow evenly to the biomass fuel holding chamber 21 in the cart 2, so that the biomass therein is evenly dried. Preferably, a temperature and humidity sensor is provided at the air inlet 11 of the heat exchanger box 1, which is used to monitor the temperature and humidity of the flue gas blown into the heat exchanger box 1. Further preferably, an air outlet duct 14 is provided in the heat exchanger box 1 at the position connected to the air outlet 12. The air outlet duct 14 ensures that the hot air after heat exchange can be discharged smoothly.

[0030] In one aspect of the embodiment of the present invention, the biomass fuel containing chambers 21 are evenly spaced on the cart 2. Figure 2 As shown, the upper end of the biomass fuel holding chamber 21 has a feed port 211, the lower end has a discharge port, and an openable and closable flap 212 is provided at the discharge port. The biomass fuel holding chamber 21 serves to hold the biomass fuel, and the whole is a breathable structure, and the side wall can be a mesh structure. The biomass fuel to be dried is put into the feed port 211, and after drying, the flap 212 is opened to discharge the dried biomass fuel from the discharge port.

[0031] The present invention provides a flue gas waste heat drying system, comprising a flue gas waste heat drying box; further comprising a loading device, a discharging device and an automatic control system; the loading device comprises a ground stacking port, a loading belt and a material cart feed port connected in sequence; the discharging device comprises a material cart unloading port, a discharging belt and a material bin connected in sequence; wherein the trolley 2 in the flue gas waste heat drying box is configured as an automatic material pushing trolley matching the material cart feed port and the material cart unloading port, and the automatic material pushing trolley reciprocates along a track arranged in a heat exchange box 1; the automatic control system is connected to the temperature and humidity sensor signal in the flue gas waste heat drying box, and is control-connected to the loading device, the discharging device and the flue gas waste heat drying box. The flue gas waste heat drying system of the present invention is composed of a material feeding device, a heat exchange box 1, an automatic pusher, a discharging device and an automatic control system. The material to be dried is mainly transported to the biomass fuel material containing chamber arranged in the automatic pusher through the feeding device. The automatic pusher enters the heat exchange box 1 through the track, and then the hot air enters the heat exchange box 1 through the air inlet to dry the biomass fuel material, and then is discharged through the air outlet. A number of temperature and humidity sensors are arranged in the heat exchange box 1. After the required drying degree of the material is monitored, the cart is sent to the unloading channel through the track, and the cart unloading port is automatically opened. The material falls on the discharging belt and is transported to the storage silo. This process does not require manual intervention, and the whole process of wet material feeding-hot air drying-dry material discharging can be realized. Automatic operation. Among them, a weighing device can be provided on the cart track to compare the weight of the material before and after drying, which is used to assist in measuring the drying degree and metering.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flue gas waste heat drying box, characterized in that: include: A heat exchange box (1) and a trolley (2), wherein the trolley (2) is placed in the heat exchange box (1) so as to be able to enter and exit; The heat exchange box (1) has an air inlet (11) on one side and an air outlet (12) on the other side; a biomass fuel containing cavity (21) is installed in the cart (2); and the side walls of the cart (2) and the side walls of the biomass fuel containing cavity (21) are both air-permeable structures.

2. The flue gas waste heat drying box according to claim 1, characterized in that: The side wall of the heat exchange box (1) has a thermal insulation layer (13).

3. The flue gas waste heat drying box according to claim 1, characterized in that: The diameter of the air inlet (11) of the heat exchange box (1) gradually increases along the airflow direction.

4. The flue gas waste heat drying box according to claim 3, characterized in that: An air distribution plate (3) is provided between the air inlet (11) and the trolley (2).

5. The flue gas waste heat drying box according to claim 1, characterized in that: A temperature and humidity sensor is provided at the air inlet (11) of the heat exchange box (1).

6. The flue gas waste heat drying box according to claim 1, characterized in that: An air outlet duct (14) is provided in the heat exchange box (1) at a position connected to the air outlet (12).

7. The flue gas waste heat drying box according to claim 1, characterized in that: The biomass fuel containing chambers (21) are evenly arranged at equal intervals on the cart (2).

8. The flue gas waste heat drying box according to claim 7, characterized in that: The biomass fuel containing cavity (21) has a feed port (211) at the upper end and a discharge port at the lower end, and an openable and closable flap (212) is provided at the discharge port.

9. The flue gas waste heat drying box according to claim 1, characterized in that: The cart (2) has a handle (22) on one side.

10. A flue gas waste heat drying system, characterized in that: It comprises the flue gas waste heat drying box as described in claims 1 to 9; it also comprises a feeding device, a discharging device and an automatic control system; The feeding equipment comprises a ground material stacking opening, a feeding belt and a material feeding opening of a material vehicle which are connected in sequence; The discharging equipment includes a discharging port of a material truck, a discharging belt and a silo which are connected in sequence; Wherein, the trolley (2) in the flue gas waste heat drying box is configured as an automatic material pushing trolley that matches the material feeding port and the material unloading port of the material pushing trolley, and the automatic material pushing trolley reciprocates along a track arranged in the heat exchange box (1); The automatic control system is connected to the temperature and humidity sensor signals in the flue gas waste heat drying box, and is control-connected to the loading device, the discharging device and the flue gas waste heat drying box.

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