JPS6321312Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a deodorizing device for foul-smelling air generated in human waste treatment, sewage treatment, etc.

(Prior Art) This type of deodorizing device that uses activated carbon particles as an adsorbent and is equipped with a regenerating device for the activated carbon particles is already well known.

(Problems to be solved by the invention) Although the above conventional methods have their own characteristics,
After first cleaning the malodor-treated air, then removing the moisture from the cleaning and dehumidifying it, the malodor is adsorbed by activated carbon particles that constantly flow in a layered manner, and the activated carbon that has been treated with odor absorption is heated to deodorize and regenerate it. There is no continuous equipment that can do this, and therefore, the efficiency of conventional equipment as a continuous operation was relatively low.

(Means for solving the problem) The present invention improves work efficiency by consistently and continuously performing the cleaning, dehumidification, odor absorption by activated carbon particles, and recycling of activated carbon particles. A cleaning device for the treated air is provided in communication with the discharge side of the fan for supplying the treated air, and the exhaust side of the dehumidifying device that communicates with the exhaust port of the cleaning device is connected to the adsorption device having an exhaust port at the top through the fan. The processing cylinder of the adsorption device is connected to the lower air supply port of the processing cylinder, and inside the processing cylinder of the adsorption device, between the upper exhaust port and the lower communication port, air-permeable perforated plates that flow granular activated carbon in a layered manner are arranged alternately in opposite directions. The activated carbon particles are installed in a multi-stage manner with an inclination to A deodorizing and decomposing furnace is provided which communicates with the activated carbon granule supply port provided at the upper part of the multi-stage fluidized plate through a reflux pipe and communicates with the upper part of the deodorizing tower to heat and deodorize the deodorized air. A heat exchanger that utilizes exhaust heat is connected to the decomposition furnace, and air from the blower is blown into the function regeneration section of the dehumidifier through the heat exchanger.

(Example) An example of the present invention and its operation will be described with reference to the drawings.

Foul-smelling air from a human waste treatment plant or a sewage treatment plant is sent to a cleaning device 2 by a fan 1.

The cleaning device 2 is provided with a water spray pipe 9 in the upper part of the tower 8, and a filler layer 10 is provided below the water spray pipe 9, and water is sprayed from the water spray pipe 9 to wet the filler in the filler layer 10 and spray it into the tower 8. The purpose is to clean the foul-smelling air that is inserted from the bottom and rises.This cleaning process is not limited to water, but acids, alkalis, and other chemical solutions can be used as necessary. This cleaning process can remove gases such as ammonia that cannot be adsorbed by the activated carbon adsorption process that will be performed later.

After the cleaning process, the air contained a large amount of moisture, so it was then sent to the dehumidifier 3 to remove moisture.

The dehumidifier 3 dehumidifies with the dehumidifier by, for example, slowly rotating a rotary drum 11 filled with a dehumidifier inside, and blowing and circulating treated air from a part of one side toward the other side. , rotary cylinder 11
In other parts, a dry type dehumidifier is used which dries the dehumidifier and regenerates its dehumidifying ability by blowing and circulating hot air for regeneration from one side to the other. The cleaned and dehumidified foul-smelling air is then fed into the adsorption device 5 from below by the fan 4.

The adsorption device 5 supplies granular activated carbon to the fluidized plate 13 from the upper part of the fluidized plate 13, which is formed by a multi-stage perforated plate arranged at the upper part of the treatment tower 12 so as to be tilted alternately in opposite directions.
The foul-smelling air is deodorized while rising while coming into contact with the multilayered activated carbon, and passes through the treatment tower 1.
The air is exhausted from the exhaust port 14 at the top of 2.

Activated carbon that has come into contact with malodorous air and adsorbed malodors in the treatment tower 12 is sequentially sent from the lower part of the tower 12 through the downflow pipe 15 to the deodorizing tower 6 on the lower surface.

The deodorizing tower 6 is equipped with a heater 16 that feeds steam through a heating steam pipe 21 to heat the activated carbon, and air is pressurized through an air supply pipe 17 opened at the bottom of the treatment tower 6 to remove malodorous components from the activated carbon. Attach and detach;
The foul-smelling air is sent from the upper part of the deodorizing tower 6 to the deodorizing decomposition furnace 7 through the outlet pipe 22. The activated carbon whose adsorption function has been regenerated by desorption is allowed to flow down from the bottom of the deodorizing tower 6, and is refluxed to the upper supply port of the multi-stage inclined fluidizing plate 13 in the treatment tower 12 via the reflux pipe 19 by the transport air from the blower 18. It is then repeatedly supplied and used for adsorption treatment of bad odors.

The malodorous components of the air sent from the deodorizing tower 6 to the deodorizing decomposition furnace 7 are concentrated to more than 100 times the initial concentration before the odor absorption treatment, and are contained in a small amount of air. The odor is easily eliminated by oxidative decomposition at a high temperature of 650°C or higher at 20°C, or by thermal decomposition at a temperature of 250° to 350°C when a catalyst is used, and the odor is released as odorless. In order to use the heat for decomposing bad odors in the furnace 7 for heating the regenerating hot air of the dehumidifying device 3, a heat exchanger 23 using the exhaust heat as a heat source is connected to the exhaust side of the deodorizing decomposition furnace 7. The air for regeneration in the dehumidifier 3 was passed through the heat exchanger 23 by a blower 24 to be heated.

In the figure, 25 indicates a pump for supplying fuel to the oil burner 20.

(Effects of the invention) According to the invention, the foul-smelling air that has been cleaned and then dehumidified is sent to an adsorption device and brought into contact with activated carbon layers flowing in multiple stages in countercurrent flow, thereby performing adsorption treatment. Compared to a fixed type, activated carbon moves downward in layers along the flow surface formed by multi-stage perforated plates that are tilted in opposite directions alternately, improving the contact efficiency between activated carbon and foul-smelling air. In addition, at this time, the foul-smelling air is treated with a dehumidifying device in advance to sufficiently remove moisture, so there is a risk that the deodorizing effect will decrease due to the adhesion of moisture contained in the treated air, or that the particles of granular activated carbon may collapse due to the moisture. The activated carbon used for adsorption treatment is sequentially transferred to a deodorizing tower to regenerate its activity and then repeatedly fed to the adsorption device for continuous use, so that the flow of foul-smelling air is always in contact with the active activated carbon. Since the activated carbon is placed in a fixed position, the adsorption treatment effect can be significantly improved, and the treatment equipment can be made more compact compared to the case where the activated carbon is placed in a fixed position.
Furthermore, the malodorous components in the treated air that has been regenerated from activated carbon are concentrated 50 to 100 times in a small amount of air compared to the initial amount, but this deodorized air is thermally decomposed at high temperatures in a deodorizing decomposition furnace. The air is heated by a heat exchanger that utilizes the exhaust heat used to thermally decompose the treated air in the deodorizing decomposition furnace, and is then blown into the functional regeneration section of the dehumidifier. By increasing the regeneration efficiency of the dehumidifying function, the dehumidifying effect of the dehumidifying device on the malodor-treated air is improved, and the water contained in the malodor-treated air that has been cleaned and dehumidified is more accurately removed. It has the effect of preventing dew condensation from being disintegrated on the surface of activated carbon.

[Brief explanation of the drawing]

The drawing is a system diagram showing an embodiment of the device of the present invention. 1... Supply fan for treated malodorous air, 2... Cleaning device, 3... Dehumidifying device, 4... Fan, 5... Adsorption device, 6... Deodorizing tower, 7... Deodorizing decomposition furnace, 12
... Treatment tower of adsorption device, 13 ... Multi-stage inclined fluidized plate, 16 ... Heater, 17 ... Deodorizing treatment air supply pipe,
23...Heat exchanger, 24...Blower.

Claims (1)

[Scope of utility model registration request] An adsorption device having a cleaning device for the treated air that communicates with the discharge side of a fan for supplying malodor-treated air, and an exhaust port at the top of the fan through which the exhaust side of a dehumidifier that communicates with the exhaust port of the cleaning device is provided. The processing cylinder of the adsorption device is connected to the lower air supply port of the processing cylinder, and in the processing cylinder of the adsorption device, between the upper exhaust port and the lower communication port, air permeable perforated plates that flow granular activated carbon in a layer are alternately arranged opposite to each other. A down-flow pipe for activated carbon particles connected to the bottom thereof is connected to a deodorizing tower which has a heater inside and circulates treated air for deodorizing, and a lower discharge port of the deodorizing tower. A deodorizing and decomposing furnace is provided which communicates with the upper part of the deodorizing tower and heats and deodorizes the deodorized air. An air deodorizing device comprising a heat exchanger that utilizes the exhaust heat of the furnace, which is connected to the decomposition furnace, and air from the blower is blown into the function regeneration section of the dehumidifier through the heat exchanger.