Sludge disc drying device with waste heat recovery function

Abstract

The utility model discloses a sludge disc drying device with a waste heat recovery function, which is characterized in that a waste gas outlet of a disc drying machine is communicated with an inlet end of a dust remover through a pipeline, an outlet end of the dust remover is communicated with an inlet end of a condenser through a pipeline, and an outlet end of the condenser is communicated with an inlet end of a waste gas fan through a pipeline; the outlet end of the waste gas fan is respectively communicated with a waste gas discharge pipeline and a waste gas backflow pipeline through a three-way connector A, one end of the waste gas discharge pipeline is communicated with the inlet end of the static pressure box, and the outlet end of the static pressure box is communicated with an external deodorization system through a deodorization pipeline; and one end of the waste gas backflow pipeline is communicated with a replacement gas inlet of the disc drying machine. After being dedusted and condensed, the high-temperature waste gas of the disc drying machine is recycled and used as circulating carrier gas, so that the drying efficiency is improved, the energy consumption of the disc drying machine is reduced, the tail end deodorization waste gas treatment load is reduced, and the deodorization operation cost and the investment cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving and environment -friendly device technical field, concretely relates to a sludge disc drying device with waste heat recovery function. BACKGROUND

[0002] Disc drying machine adopts steam indirect heat exchange mode, and the main body is composed of a cylindrical shell with a jacket and a group of central communicating disc middle shafts and transmission devices. The heat medium passes through the hollow of the jacket and the central shaft disc to transfer heat to the sludge between the disc and the inner side of the shell, so that the sludge absorbs heat and evaporates water, and the water vapor formed by the sludge water gathers in the dome of the drying machine, and is discharged together with the carrier gas entering the disc drying machine through the exhaust fan, so that the purpose of sludge drying is achieved.

[0003] However, the existing disc drying machine uses air at room temperature as carrier gas, and the low temperature of the carrier gas easily leads to the condensation of water vapor at the top of the disc drying machine, and the low temperature carrier gas carries away part of the sludge heat, reduces the sludge drying efficiency, and increases the disc drying steam consumption.

[0004] Therefore, a sludge disc drying device with waste heat recovery function is designed to improve the carrier gas temperature of the disc drying machine, increase the sludge drying efficiency, reduce the disc drying steam consumption, reduce the end deodorization exhaust gas treatment load, reduce the deodorization operation cost and investment cost, and become the further improvement direction. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a sludge disc drying device with waste heat recovery function, which comprises a disc drying machine, a dust remover, a condenser, an exhaust fan, a static pressure tank, an exhaust gas discharge pipeline and an exhaust gas return pipeline, the exhaust gas outlet of the disc drying machine is communicated with the inlet end of the dust remover through a pipeline, the outlet end of the dust remover is communicated with the inlet end of the condenser through a pipeline, the outlet end of the condenser is communicated with the inlet end of the exhaust fan through a pipeline, the outlet end of the exhaust fan is communicated with the exhaust gas discharge pipeline and the exhaust gas return pipeline through a three-way joint A, one end of the exhaust gas discharge pipeline is communicated with the inlet end of the static pressure tank, and the outlet end of the static pressure tank is communicated with an external deodorization system through a deodorization pipeline; one end of the exhaust gas return pipeline is communicated with the displacement gas inlet of the disc drying machine.

[0006] Preferably, a first regulating valve is arranged on the exhaust gas discharge pipeline, a second regulating valve is arranged on the exhaust gas return pipeline, and the first regulating valve and the second regulating valve are used for adjusting the exhaust gas recovery ratio.

[0007] Preferably, a three-way joint B is arranged at the displacement gas inlet of the disc drying machine, and the other two outlets of the three-way joint B are respectively communicated with a fresh air pipeline and an expansion joint.

[0008] Preferably, a first negative pressure gauge and a first temperature gauge are arranged at the exhaust outlet of the disc dryer; and a second negative pressure gauge and a second temperature gauge are arranged at the outlet end of the condenser.

[0009] Preferably, a manual regulating valve is arranged on the fresh air pipeline.

[0010] Preferably, the expansion joint is communicated with the exhaust gas return pipeline.

[0011] Preferably, a third negative pressure gauge and a third temperature gauge are arranged on the tee joint B.

[0012] Preferably, the dust remover is a spiral dust remover.

[0013] Compared with the prior art, the disc dryer has the following beneficial effects:

[0014] (1) The exhaust outlet of the disc dryer is communicated with the inlet end of the dust remover through a pipeline, the outlet end of the dust remover is communicated with the inlet end of the condenser through a pipeline, the outlet end of the condenser is communicated with the inlet end of the exhaust gas fan through a pipeline, the outlet end of the exhaust gas fan is communicated with the exhaust gas discharge pipeline and the exhaust gas return pipeline through a tee joint A, one end of the exhaust gas discharge pipeline is communicated with the inlet end of the static pressure tank, the outlet end of the static pressure tank is communicated with the external deodorization system through a deodorization pipeline, and one end of the exhaust gas return pipeline is communicated with the replacement gas inlet of the disc dryer. The high-temperature exhaust gas of the disc dryer is recycled and used as a circulating carrier gas after being dust-removed and condensed, the drying efficiency is improved, the energy consumption of the disc dryer is reduced, the end deodorization exhaust gas treatment load is reduced, and the deodorization operation cost and investment cost are reduced. The exhaust gas generated in the whole drying process is condensed by indirect heat exchange equipment, the cooling medium does not directly contact the exhaust gas, the cooling water can be recycled, a large amount of water resources is saved, pollution to the environment is avoided, and compared with direct water spraying cooling, the amount of waste liquid treated by the sewage treatment station is greatly reduced.

[0015] (2) The whole device is closed, the high-temperature exhaust gas generated in the sludge drying process is discharged through the exhaust gas fan, the disc dryer and the auxiliary equipment, and the system pipeline are maintained in a micro-negative pressure operation, the odor is collected to the deodorization system for treatment, the odor is not leaked, the conveying mode is continuous and uninterrupted, the sludge drying process runs stably, and the drying effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 Fig. 1 is one of the perspective views of the disc dryer.

[0017] Fig. 2 Fig. 2 is the second perspective view of the disc dryer.

[0018] Fig. 3 Fig. 3 is a top view of the disc dryer. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings and specific embodiments.

[0020] As Figs. 1-3 shown, a sludge disc drying device with waste heat recovery function, including disc drying machine 1, dust remover 2, condenser 3, waste gas fan 4, static pressure tank 5, waste gas discharge pipeline 6, waste gas return pipeline 7, first regulating valve 8, second regulating valve 9, three-way joint A 10, three-way joint B 11, fresh air pipeline 12, expansion joint 13, first negative pressure gauge 14, first temperature gauge 15, second negative pressure gauge 16, second temperature gauge 17, manual regulating valve 18, third negative pressure gauge 19, third temperature gauge 20, deodorization pipeline 21 and fourth negative pressure gauge 22.

[0021] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium.The specific meaning of the above terms in the utility model can be understood according to the specific circumstances for those skilled in the art.

[0023] As Figs. 1-3 shown, the waste gas outlet of disc drying machine 1 is communicated with the inlet end of dust remover 2 through a pipeline, and in this embodiment, the dust remover 2 is a spiral dust remover.

[0024] The outlet end of the dust collector 2 is communicated with the inlet end of the condenser 3 through a pipeline, the outlet end of the condenser 3 is communicated with the inlet end of the waste gas fan 4 through a pipeline, the outlet end of the waste gas fan 4 is communicated with the waste gas discharge pipeline 6 and the waste gas return pipeline 7 through a three-way joint A10, one end of the waste gas discharge pipeline 6 is communicated with the inlet end of the static pressure tank 5, the outlet end of the static pressure tank 5 is communicated with an external deodorization system through a deodorization pipeline 21, and the static pressure tank 5 is provided with a fourth negative pressure gauge 22; one end of the waste gas return pipeline 7 is communicated with the replacement gas inlet of the disc dryer 1.

[0025] The high-temperature waste gas generated in the sludge disc drying process is first de-dusted by the dust collector 2, then dehumidified by the condenser 3, and then passed through the waste gas fan 4, part of which is returned to the disc dryer 1 as a circulating carrier gas, and the remaining part is connected to the deodorization pipeline 21.

[0026] After the high-temperature waste gas of the disc dryer 1 is de-dusted and condensed, the high-temperature waste gas is recycled and used as a circulating carrier gas, which improves the drying efficiency, reduces the energy consumption of the disc dryer 1, reduces the end deodorization waste gas treatment load, and reduces the deodorization operation cost and investment cost. The waste gas generated in the entire drying process uses an indirect heat exchange condensing device, and the cooling medium does not directly contact the waste gas. The cooling water can be recycled, which not only saves a large amount of water resources, but also avoids pollution to the environment. Compared with direct water spray cooling, the amount of waste liquid treated by the sewage treatment station is greatly reduced.

[0027] The waste gas discharge pipeline 6 is provided with a first adjusting valve 8, and the waste gas return pipeline 7 is provided with a second adjusting valve 9, and the first adjusting valve 8 and the second adjusting valve 9 are used to adjust the waste gas recycling ratio.

[0028] The replacement gas inlet of the disc dryer 1 is provided with a three-way joint B11, and the other two outlets of the three-way joint B11 are communicated with a fresh air pipeline 12 and an expansion joint 13 respectively, the fresh air pipeline 12 is provided with a manual adjusting valve 18 for adjusting the size of the fresh air pipeline 12 inlet, and the expansion joint 13 is communicated with the waste gas return pipeline 7.

[0029] The waste gas outlet of the disc dryer 1 is provided with a first negative pressure gauge 14 and a first temperature gauge 15; the outlet end of the condenser 3 is provided with a second negative pressure gauge 16 and a second temperature gauge 17.

[0030] The three-way joint B11 is provided with a third negative pressure gauge 19 and a third temperature gauge 20 for monitoring the replacement gas temperature and pressure.

[0031] The whole device is closed, the high-temperature waste gas generated in the sludge drying process is discharged through the waste gas fan, the disc dryer 1 and auxiliary equipment, system pipeline maintain micro negative pressure operation, the odor is collected to the deodorization system for treatment, the odor has no leakage, the conveying mode is continuous and uninterrupted, the sludge drying whole process runs stably, and the drying effect is good. Through use of the sludge disc drying device, the municipal sludge treatment effect is obvious, sludge reduction is as high as 70%, waste heat is recycled, tail gas deodorization treatment load is low, compared with the traditional disc drying system device, drying efficiency is significantly improved, comprehensive energy consumption is reduced by 20%, waste gas deodorization air volume is reduced by 50%, and deodorization system operation cost is reduced by more than 40%.

[0032] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the right scope of the utility model, therefore, the modification, equivalent change, improvement and the like made according to the patent application scope of the utility model still belong to the range covered by the utility model.

Claims

1. A sludge disc drying device with waste heat recovery function, characterized in that: The system includes a disc dryer (1), a dust collector (2), a condenser (3), an exhaust fan (4), a static pressure box (5), an exhaust gas discharge pipe (6), and an exhaust gas return pipe (7). The exhaust gas outlet of the disc dryer (1) is connected to the inlet of the dust collector (2) through a pipe. The outlet of the dust collector (2) is connected to the inlet of the condenser (3) through a pipe. The outlet of the condenser (3) is connected to the inlet of the exhaust fan (4) through a pipe. The outlet of the exhaust fan (4) is connected to the exhaust gas discharge pipe (6) and the exhaust gas return pipe (7) through a three-way connector A (10). One end of the exhaust gas discharge pipe (6) is connected to the inlet of the static pressure box (5). The outlet of the static pressure box (5) is connected to an external deodorization system through a deodorization pipe (21). One end of the exhaust gas return pipe (7) is connected to the replacement gas inlet of the disc dryer (1).

2. The sludge disc drying device with waste heat recovery function according to claim 1, characterized in that: The exhaust gas emission pipe (6) is provided with a first regulating valve (8), and the exhaust gas return pipe (7) is provided with a second regulating valve (9). The first regulating valve (8) and the second regulating valve (9) are used to adjust the exhaust gas recovery ratio.

3. The sludge disc drying device with waste heat recovery function according to claim 2, characterized in that: The rotary dryer (1) has a three-way interface B (11) at the gas inlet, and the other two outlets of the three-way interface B (11) are connected to the fresh air duct (12) and the expansion joint (13) respectively.

4. The sludge disc drying device with waste heat recovery function according to claim 3, characterized in that: The exhaust outlet of the disc dryer (1) is equipped with a first negative pressure gauge (14) and a first temperature gauge (15); the outlet of the condenser (3) is equipped with a second negative pressure gauge (16) and a second temperature gauge (17).

5. A sludge disc drying device with waste heat recovery function according to claim 4, characterized in that: The fresh air duct (12) is equipped with a manual regulating valve (18).

6. The sludge disc drying device with waste heat recovery function according to claim 3, characterized in that: The expansion joint (13) is connected to the exhaust gas return pipe (7).

7. A sludge disc drying device with waste heat recovery function according to claim 6, characterized in that: The three-way interface B (11) is equipped with a third negative pressure gauge (19) and a third temperature gauge (20).

8. The sludge disc drying device with waste heat recovery function according to claim 1, characterized in that: The dust collector (2) is a spiral dust collector (2).

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