JP5569547B2 - Sludge treatment equipment - Google Patents

Description

  The present invention relates to a sludge treatment facility for making sewage sludge discharged from a sewage treatment plant into a cement kiln and turning it into a cement raw material.

  In recent years, as a sludge treatment such as sewage sludge discharged from a sewage treatment plant, a cement raw material technology by directly blowing a sewage sludge cake into a cement clinker firing furnace has been proposed and put into practical use. In this technology, sewage dewatered sludge (water-containing sludge) that has been treated to about 80% moisture is carried in a truck (lorry vehicle), etc., and directly fed into a cement kiln, which is a cement clinker firing furnace, and heated at a high temperature. Thus, moisture and combustible components are evaporated and burned, and the ash of the inorganic component is sintered together with the cement raw material as a clinker which is a cement intermediate product.

  Such a treatment technique does not produce any secondary waste because the ash of the inorganic component in the sewage dewatered sludge is used as a raw material for cement by being used as a part of the clay raw material. Therefore, it can be said that this cementation raw material technology is an excellent treatment technology for protecting the environment.

  In addition, for example, in the following Patent Document 1, such treatment technology collects sewage when cleaning sludge hopper storing water-containing sludge or piping connected to the sludge hopper, and returning the sewage to the sludge hopper. A sewage recovery mechanism that collects and stores the sewage, a sewage return pipe that connects the sewage recovery tank and the sludge hopper, and a sewage recovery pipe provided in the sewage return pipe. There has been proposed a sludge treatment facility that includes a sewage return pump that returns sewage in a tank to the sludge hopper, and that feeds and processes the hydrous sludge stored in the sludge hopper into a rotary kiln.

  In the conventional sludge treatment facility, the hydrous sludge transported by a truck from a sewage treatment plant is stored in a sludge hopper as a storage tank, and the rotary kiln's kiln bottom is passed through the sludge introduction pipe from the sludge hopper. It was transferred by a pressure pump.

  However, when the water-containing sludge is put into the sludge hopper by a truck and stored, as shown in FIG. 5, the sludge hopper 2 is always put in from the inlet 9 on one side of the sludge hopper 2. The water-containing sludge 5 is not uniformly stored but is deposited on the one side. At that time, in the conventional sludge treatment facility, the sprinkling part 7a of the sewage return pipe 7 for returning the sewage 6 from the sewage recovery tank to the sludge hopper 2 is an inlet 9 for the hydrated sludge 5 loaded on the truck 8. Since it is arranged on the other side of the sludge hopper 2 opposite to the one side, the sewage 6 is not mixed with the hydrated sludge 5, but only the sewage 6 is collected on the other side, and the hydrated sludge 5 is stored in the rotary kiln. When the amount of moisture in the water-containing sludge 5 varies when it is put into the water, and the amount of moisture increases, there is a problem that the burden on the rotary kiln increases.

  Further, when used in winter or cold regions, the sewage 6 in the sewage collection tank freezes, and the sewage collection tank and the sewage return pump for returning the sewage 6 to the sludge hopper 2 and the sewage return pipe. However, there is also a problem that the above-mentioned waste water may be damaged by freezing.

  Moreover, the sludge hopper 2 and the pipe connected to the sludge hopper 2 are periodically cleaned with cleaning water, and the cleaning is appropriately performed. The sewage 6 generated at this time is returned to the sludge hopper 2 through the sewage recovery mechanism, and is then put into the rotary kiln for processing. However, since the truck 8 transporting the sewage sludge 5 from the sewage treatment plant puts the sewage sludge 5 into the sludge hopper 2 and then leaves the sludge treatment facility as it is, the sewage sludge remaining on the loading platform 8a of the truck 8 remains. 5 is stuck to the loading platform 8a due to drying, or when the loading platform 8a is washed in another place, there is a problem that a separate sewage treatment is required.

Japanese Patent Laid-Open No. 2002-224692

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sludge treatment facility capable of uniformly spraying sewage to the hydrous sludge accumulated in the sludge hopper.

In order to solve the above-mentioned problem, the invention described in claim 1 is a sewage that collects sewage when cleaning a sludge hopper storing sewage sludge transported by a truck from a sewage treatment plant or piping in a sludge treatment facility. In the sludge treatment facility for treating the hydrated sludge stored in the sludge hopper by a cement manufacturing process, including a recovery tank and a sewage return mechanism including a sewage return pipe for sending water from the sewage recovery tank to the sludge hopper. The sprinkler on the sludge hopper side of the sludge return pipe is configured to spray the sewage sludge into the sludge hopper by the truck so that the sewage is sprinkled on the top of the sewage sludge accumulated in a mountain shape in the sludge hopper. disposed above the drop position, and with tube waterways are arranged vertically, the baffles are spaced downward from the lower end of the nozzle unit And it is characterized in that it is horizontally disposed location.

According to a second aspect of the present invention, in the first aspect of the present invention, the sewage recovery tank is provided with a circulation device that circulates the stored sewage to prevent freezing. It is what.

Furthermore, in the invention described in claim 3 , in the invention described in claim 1 or 2 , a watering device is provided for cleaning the truck with cleaning water after the water-containing sludge is charged into the sludge hopper. It is characterized by.

According to the present invention described in claims 1 to 3 , when the sewage collected in the sewage collection tank is sprinkled into the sludge hopper in which the sewage sludge is accumulated, the water spray part on the sludge hopper side of the sewage return pipe is hydrated. Since the sludge is disposed above the dropping position where the sludge is introduced from the inlet in the sludge hopper by the truck, the sludge is sprinkled on the surface along the slope from the top of the water-containing sludge accumulated in a mountain shape. be able to. Thereby, it can prevent storing in the state which the said sewage and the said water-containing sludge isolate | separated.

In addition , the water sprinkling part of the sewage return pipe has a pipe water channel arranged vertically, and a baffle plate is horizontally arranged at a position spaced downward from the lower end of the water sprinkling part. The sewage can be spread evenly over the entire surface from the top to the skirt of the hydrated sludge accumulated in a mountain shape. As a result, when the hydrated sludge stored in the sludge hopper is introduced into, for example, a cement kiln, the hydrated sludge without variation in moisture content can be introduced, and the burden on the cement kiln can be reduced.

According to the second aspect of the present invention, since the sewage recovery tank is provided with a circulation device that circulates the stored sewage to prevent freezing, the sludge treatment facility is used in a cold district or the like. Even in such a case, it is possible to prevent damage to the sewage recovery tank and the pipes and pumps connected to the sewage recovery tank due to freezing of the sewage.

According to the third aspect of the present invention, since a watering device for washing the truck with washing water after the water-containing sludge is put into the sludge hopper is disposed, the truck carrying the water-containing sludge is disposed in the truck. The adhering water-containing sludge can be easily washed by putting it in the sludge hopper and washing it. As a result, the water-containing sludge can be washed before drying and can be washed with relatively little washing water.

  Further, by collecting the sewage generated at the time of washing and sending it to the sewage recovery tank, the sewage can be put into a cement kiln for treatment. Thereby, the treatment of the water-containing sludge remaining on the truck can be easily performed, and the environment can be considered.

It is a schematic structure figure showing one embodiment of the sludge treatment equipment concerning the present invention. 1 shows an embodiment of a sludge treatment facility according to the present invention, wherein (a) is a configuration diagram of a sludge receiving facility and a sludge hopper storage facility in an underground pit, and (b) a configuration diagram of a sludge hopper storage facility in an underground pit. . It is a top view of the sludge acceptance apparatus of FIG. 1 and FIG. It is the schematic diagram which showed the position of the watering part by the side of the said sludge hopper of the sludge return pipe to the sludge hopper in one Embodiment of the sludge processing equipment which concerns on this invention. It is the schematic diagram which showed the position of the watering part by the said sludge hopper side of the sludge return pipe to the sludge hopper in the past

As shown in FIG. 1, a sludge treatment facility 1 according to an embodiment of the present invention includes a cement production facility (cement production process) 13 having a preheater 23 and a dry rotary kiln 18 for preheating cement raw material C, and water from a sewage treatment plant. A sludge receiving facility 15 that receives a truck 8 that transports the sludge 5, a watering device 11 disposed in the sludge receiving facility 15, a sludge hopper 2 that stores the hydrous sludge 5, and the sludge hopper 2 or the sludge hopper 2. The sludge hopper storage facility 28 having a sewage collection tank 3 for collecting and storing the sewage 6 when the pipe connected to the pipe is washed, and the kiln bottom of the dry rotary kiln 18 through the sludge introduction pipe 17 for containing the sewage sludge 5 A sludge charging mechanism 16 that is charged from the 19a side is schematically configured.
The water-containing sludge 5 is sewage dewatered sludge with a water content of about 80%. Moreover, although this water-containing sludge is not pre-processed, such as additive addition, what carried out pre-processes, such as additive addition, may be used. Furthermore, the truck 8 is, for example, a sealed container-equipped vehicle that can seal the hydrous sludge 5 in the loading platform 8a.

  Here, the cement production facility 13 is pulverized by a raw material mill (not shown), and a preheater 23 for preheating the cement raw material C fed from the chute S is connected to the kiln bottom 19a of the dry rotary kiln 18 via the housing 22. The cement raw material C is supplied to the kiln bottom part 19a through the preheater 23 and the housing 22.

  Further, the preheater 23 is mainly configured by a plurality of cyclones 23a provided in a row in the vertical direction and a rising duct 23b that connects the cyclones 23a so as to raise the exhaust gas from the dry rotary kiln 18. In addition, the code | symbol F is an induction fan and raises the exhaust gas from the dry-type rotary kiln 18 via each cyclone 23a and each rise duct 23b, and makes it discharge | emit outside.

  The dry rotary kiln 18 has a housing 22 connected to the kiln butt portion 19a, a cylindrical kiln shell 19 that is inclined slightly downward and rotated in the circumferential direction, and a downstream side of the kiln shell 19. A burner 20 that is provided and uses heavy oil or pulverized coal as fuel, and a clinker cooler 21 that is provided below the downstream portion of the kiln shell 19 are provided. The housing 22 is connected to a rising duct 23b at the bottom of the preheater 23 at the top, and the bottom surface 22a is a slope inclined upward toward the upstream side.

  Further, the sludge charging mechanism 16 is provided for charging the hydrous sludge 5 from the kiln bottom 19a side of the dry rotary kiln 18. The sludge charging mechanism 16 is connected to the sludge hopper 2 that stores the water-containing sludge 5 conveyed by the truck 8, and the sludge introduction pipe 17 that pumps the water-containing sludge 5 through the pressure feed pump 24, and the sludge introduction pipe 17 The front end is provided above the bottom surface 22a of the housing 22 and has a sludge inlet 14 through which the hydrous sludge 5 is dropped toward the bottom surface 22a. That is, the sludge inlet 14 is provided on the inner wall of the housing 22, which is a connection portion between the preheater 23 and the kiln bottom 19 a.

  Then, as shown in FIG. 3, the sludge receiving facility 15 has a substantially square-shaped building 15b in plan view, and a plan view in which the truck 8 can enter and exit from each continuous wall surface of the building 15b. A rectangular sludge receiving chamber 15a is connected. Furthermore, in the building 15b, a plurality of nozzles (watering devices) 11 for spraying and washing the washing water on the loading platform 8a of the truck 8 are provided on the ceiling side, and the water-containing sludge 5 is placed on the floor surface. An opening 15c for feeding into the sludge hopper 2 is provided. Further, a cleaning water supply pipe 42 for feeding cleaning water to the nozzle by a truck cleaning water pump 40 is connected to the nozzle 11 via a valve 41. A cleaning water supply source (not shown) is connected to the base end side of the cleaning water supply pipe 42.

  Further, the sludge receiving facility 15 has an underground pit 12 buried under the building 15b. Further, in this underground pit 12, as shown in FIG. 2A, a sludge hopper storage facility 28 is disposed. As shown in FIG. 2B, the sludge hopper storage facility 28 (lower structure) includes two sludge hoppers 2 stored in the underground pit 12, and each sludge hopper 2 or each sludge hopper. 2 is provided with a sewage recovery mechanism 4 that recovers the sewage 6 when the pipe connected to the pipe 2 is washed and sends the sewage 6 to the sludge hopper 2. The two sludge hoppers 2 each include a lid member 2a that can be freely opened and closed.

  A storage pit 30 for temporarily storing the sewage 6 is provided on the floor of the underground pit 12. Further, the storage pit 30 is connected to a recovery pipe 31 that connects the storage pit 30 and the sewage recovery tank 3 via a check valve 31a, and the sewage in the storage pit 30 is supplied to the recovery pit 30. A sewage recovery pump 32 is provided as a submersible pump to be sent to the sewage recovery tank 3.

  The sewage recovery mechanism 4 collects the sewage 6, the sewage recovery tank 3 that stores the sewage 6, the sewage return pipe 7 that connects the sewage recovery tank 3 to each sludge hopper 2, and the sewage A sewage return pump 25 which is provided in the return pipe 7 and is a submersible pump for feeding the sewage 6 in the sewage recovery tank 3 to the sludge hopper 2 is provided. A stirring blade (circulation device) 10 is provided at the bottom of the sewage recovery tank 3. The stirring blade 10 is rotatably provided by a driving device (not shown) in order to convect the sewage 6 collected and stored in the sewage recovery tank 3 and prevent the sewage 6 from freezing.

  In addition, as shown in FIG. 4, the sewage return pipe 7 has a sprinkler 7 a from which the sewage 6 on the sludge hopper 2 side is discharged by a truck 8 from the inlet 9 side into which the sewage sludge 5 of the sludge hopper 2 is introduced. It is disposed above the position where the hydrated sludge 5 falls when thrown. That is, the center of the water sprinkling part 7 a of the sewage return pipe 7 is generally disposed at the position of the top part 5 a of the water-containing sludge 5.

  And in the sprinkling part 7a of the sewage return pipe 7, the pipe internal water channel 7b which is a flow path of the sewage 6 is arranged in the vertical direction. Further, the water spray 7 a is provided with a baffle plate 7 c so that the discharged sewage 6 scatters from above the top 5 a of the accumulated water-containing sludge 5. The baffle plate 7c is horizontally disposed at a position spaced downward from the lower end of the water sprinkling portion 7a.

  Further, the sewage return pipe 7 is connected to the two sludge hoppers 2 with a branch pipe 7d interposed therebetween. Each of the branch pipes 7d is provided with a check valve 26 and a flexible joint 27 on the way. Further, at least one of the two sludge hoppers 2 is selected and a sewage return switching valve 29 as a return switching mechanism capable of returning the sewage 6 is provided in the middle of the branch pipe 7d and the check valve 26 Each is provided on the upstream side.

The sludge introduction pipe 17 branches from the sludge introduction pipe 17 via the drain valve 33 and is connected to the sewage collection tank 3 to return the sewage 6 in the sludge introduction pipe 17 to the sewage collection tank 3. A tube 34 is connected.
The sewage recovery tank 3 is installed at a position lower than the dry rotary kiln 18, and the sludge introduction pipe 17 is inclined upward from the sewage recovery tank 3 to the dry rotary kiln 18.

  The sludge introduction pipe 17 is connected to a downstream side of the branch position of the sewage return pipe 34 on the base end side through a valve 37 through a valve 37 for supplying cleaning water into the pipe by a cleaning pump 35. Yes. A cleaning water supply source (not shown) is connected to the base end side of the cleaning water supply pipe 36. Further, the sludge introduction pipe 17 is provided with a cleaning device insertion portion 38 for inserting the cleaning device into the pipe downstream of the connection portion with the cleaning water supply tube 36 on the base end side.

  This washer has a spherical shape larger than the inner diameter of the sludge introduction pipe 17, and a sponge or the like soaked with soapy water is used. As described above, when a spherical sponge is used, even if the pipe is bent or the inside diameter is changed, the inside of the pipe can be smoothly washed and pushed forward with washing water. Moreover, by including soapy water, it is easier to enter the tube more smoothly and to proceed. The storage pit 30 and the sewage collection tank 3 are provided with level meters 39 for measuring the amount of sewage, respectively.

  A method for treating the water-containing sludge 5 and a method for cleaning the truck carrying the water-containing sludge 5 will be described using the sludge treatment facility 1 having the above-described configuration. In addition, the solid line arrow in FIG. 1 shows the transfer direction of the cement raw material C and the hydrous sludge 5, and the broken line arrow shows the flow direction of gas.

  First, the cement raw material C is put into the rising duct 23b at the uppermost part of the preheater 23. The cement raw material C descends while exchanging heat with the exhaust from the dry rotary kiln 18 rising from the rising duct 23b at the lowermost part of the preheater 23. It enters into the rotary rotary kiln 18 which rotates through the part 19a. On the other hand, the hydrated sludge 5 transported from the sewage treatment plant by the truck 8 enters the sludge receiving chamber 15a of the sludge receiving facility 15 from behind, and the hydrated sludge 5 loaded on the cargo bed 8a The lid member 2a of the sludge hopper 2 is opened and charged and temporarily stored. At this time, the water-containing sludge 5 loaded on the loading platform 8a of the truck 8 is dropped from the inlet 9 of the sludge hopper 2 as shown in FIG. As a result, the water-containing sludge 5 always accumulates at the same drop position, and accumulates in a mountain shape on the inlet 9 side of the sludge hopper 2 to form the top portion 5a.

Next, the hydrous sludge 5 stored in the sludge hopper 2 is pumped from the sludge introduction pipe 17 to the sludge inlet 14 by the pump 24. Then, the hydrous sludge 5 that has been pumped is introduced into the dry rotary kiln 18 from the sludge inlet 14. The water-containing sludge 5 thus charged into the kiln shell 19 is baked together with the cement raw material C by heating the burner 20 to become a cement clinker C1 and cooled by a clinker cooler 21 provided downstream of the kiln shell 19. Discharged.
Further, the clinker C1 is pulverized with gypsum by a finishing mill (not shown) to become a cement as a final product.

Next, a method for treating the sewage 6 generated during the cleaning of the two sludge hoppers 2 and the pipes connected to the respective sludge hoppers 2 will be described.
First, each sludge hopper 2 and the sewage 6 generated when the pipes in the underground pit 12 are washed are collected in the storage pit 30 in the floor of the underground pit 12 and temporarily stored. And the sewage 6 stored in the storage pit 30 is sent and stored in the sewage recovery tank 3 through the recovery pipe 31 by the sewage recovery pump 32.

  Next, the sewage 6 in the sewage recovery tank 3 is returned to the sludge hopper 2 through the sewage return pipe 7 by the sewage return pump 25. At this time, the amount of the sewage 6 to be returned is appropriately controlled according to the state of the sewage sludge 5 in the sludge hopper 2 (particularly the water concentration), and the sewage 6 is sent by opening and closing the sewage return switching valve 29 arbitrarily. The pipe 7d is selected, and at least one of the two sludge hoppers 2 is selected as the return destination of the sewage 6.

  Further, when the sewage 6 is fed from the sewage return pipe 7 into the sludge hopper 2, the sewage 6 is sprinkled from the water sprinkling part 7 a of the sewage return pipe 7. At this time, since the water sprinkling part 7a is disposed above the top part 5a of the water-containing sludge 5 accumulated in a mountain shape in the sludge hopper 2, the water sprinkling part 7a is disposed in all directions through baffle plates 7c provided in the water sprinkling part 7a. The sewage 6 is scattered evenly from the top 5a to the skirt of the hydrated sludge 5 in which the sewage 6 accumulates in a mountain shape. The sewage 6 sprayed on the hydrated sludge 5 in this manner is mixed with the hydrated sludge 5 and, as described above, is pumped from the sludge hopper 2 to the sludge inlet 14 via the sludge introduction pipe 17 by the pressure feed pump 24. Then, it is introduced into the dry rotary kiln 18 from the sludge inlet 14.

Furthermore, the processing method of the sewage 6 at the time of washing | cleaning the sludge introduction pipe | tube 17 with a wash water is demonstrated.
First, in order to clean the inside of the sludge introduction pipe 17, the washing machine is inserted into the pipe from the washing machine insertion portion 38, the valve 37 is opened, and the sludge introduction pipe 17 is passed through the washing water supply pipe 36 by the washing pump 35. Feed cleaning water into the inside. At this time, in order to prevent the washing water from flowing to the sludge hopper 2 side, the upstream side of the sludge introduction pipe 17 is closed by a valve (not shown) and the drain valve 33 is also closed so that the washing water does not flow to the sewage collection tank 3. Yes.

  And the washing water sent in the sludge introduction pipe | tube 17 pushes the said washing | cleaning device in a pipe | tube to the dry-type rotary kiln 18, and wash | cleans the inside of a pipe | tube simultaneously. After the sludge introduction pipe 17 is washed in this way, the sewage 6 in the sludge introduction pipe 17 is collected in the sewage collection tank 3. That is, when the valve 37 is closed and the drain valve 33 is opened, the sewage 6 in the sludge introduction pipe 17 inclined as described above enters the sewage collection tank 3 through the sewage return pipe 34 by its own weight. Flows in. Then, the collected sewage 6 is appropriately sprinkled on the sewage sludge 5 in the sludge hopper 2 through the sewage return pipe 7 as described above according to the state of the sewage sludge 5 in the sludge hopper 2.

Further, a method for cleaning the truck 8 that transports the hydrated sludge 5 and a method for treating the sewage 6a generated during the cleaning will be described.
First, after entering the sludge receiving chamber 15a of the sludge receiving facility 15, the hydrous sludge 5 transported from the sewage treatment plant is introduced from one of the inlets 9 of the two sludge hoppers 2, and then the loading platform 8a is inclined. The washing water is sprinkled all at once from the plurality of nozzles 11 in the state. At this time, the lid member 2a of the sludge hopper 2 is closed.

  Then, the water-containing sludge 5 remaining on the cargo bed 8a is washed with the washing water sprayed from the plurality of nozzles 11. This washing water is sent from the washing water supply source to the nozzle 11 by the truck washing water pump 40 from the washing water supply pipe 42 in which the valve 41 is interposed. And the said washing water is sprinkled for a fixed time, and the water-containing sludge 5 which remained on the loading platform 8a is washed away.

  In addition, the sewage 6a generated at the time of washing flows into the underground pit 12 from the floor surface of the building 15b of the sludge receiving facility 15, and gathers in the storage pit 30 provided on the floor of the underground pit 12, and the sewage 6 As temporarily stored. And the sewage 6 stored in the storage pit 30 is sent and stored in the sewage recovery tank 3 through the recovery pipe 31 by the sewage recovery pump 32. The sewage 6 collected and stored in the sewage recovery tank 3 is appropriately contained in the sludge hopper 2 through the sewage return pipe 7 as described above according to the state of the sewage sludge 5 in the sludge hopper 2. Watered.

  As described above, the water-containing sludge 5 to which the sewage 6 has been sprinkled is pumped from the sludge hopper 2 to the sludge inlet 14 via the sludge inlet pipe 17 by the pressure feed pump 24, and from the sludge inlet 14. It is put into the dry rotary kiln 18 and fired together with the cement raw material C.

  According to the sludge treatment facility 1 according to the above-described embodiment, when the sewage 6 collected in the sewage collection tank 3 is sprinkled into the sludge hopper 2 in which the hydrated sludge 5 is accumulated, the sludge hopper 2 side of the sewage return pipe 7 The water sprinkling part 7a is disposed above the drop position where the sewage sludge 5 is introduced from the inlet 9 in the sludge hopper by the truck 8, so that the top of the sewage sludge 5 in which the sewage 6 is accumulated in a mountain shape. Water can be sprinkled on the surface along the slope from 5a. Thereby, it can prevent storing in the state which the sewage 6 and the water-containing sludge 5 isolate | separated.

  In addition, the in-pipe water channel 7b of the sprinkling part 7a of the sewage return pipe 7 is arranged in the vertical direction, and the baffle plate 7c is arranged horizontally at a position spaced downward from the lower end of the sprinkling part 7a. Therefore, by sprinkling the sewage 6 from above the top 5a of the hydrated sludge 5 deposited in a mountain shape, the entire surface from the top 5a to the skirt can be spread evenly. As a result, when the hydrated sludge 5 stored in the sludge hopper 2 is charged into the dry rotary kiln 18, the hydrated sludge 5 having no variation in water content can be charged, and the burden on the dry rotary kiln 18 can be reduced.

  And since the stirring blade 10 which prevents the freezing which circulates the sewage 6 stored in the sewage recovery tank 3 is rotatably provided at the bottom of the sewage recovery tank 3, the sludge treatment facility 1 can be used in a cold district or the like. Even when it is used, it is possible to prevent damage to the sewage recovery tank 3 due to freezing of the sewage 6 and the pipes connected to the sewage recovery tank 3 and the sewage return pump 25.

  Further, the sludge receiving facility 15 is provided with a nozzle 11 for washing the loading platform 8a of the truck 8 with washing water after the hydrous sludge 5 is put into the sludge hopper 2, so that the truck 8 carrying the hydrous sludge 5 is provided. The water-containing sludge 5 remaining on the loading platform 8a can be easily washed. As a result, the water-containing sludge 5 can be washed before drying, and washing can be performed with relatively little washing water.

  Further, the sewage 6a generated during the cleaning is temporarily stored in a storage pit 30 provided at the bottom of the underground pit 12, and the sewage 6a is supplied by sending water from the storage pit 30 to the sewage recovery tank 3. It can be put into a dry rotary kiln 18 for processing. Thereby, the process of the water-containing sludge 5 which remained in the truck 8 can be performed simply, and it can consider an environment.

  Then, the sewage 6 is stored in the sewage recovery tank 3 by the sewage recovery mechanism 4, and the amount of the sewage 6 that is appropriately returned by the sewage return pump 25 is controlled according to the state of the sewage sludge 5 in the sludge hopper 2. The water content of the water-containing sludge 5 can be adjusted. Accordingly, the sewage 6 can be returned to the respective sludge hoppers 2 while adjusting the return amount, and the water-containing sludge 5 with the moisture adjusted appropriately can be supplied from the sludge hopper 2 to the dry rotary kiln 18. The burden can be reduced.

  Further, since the sewage recovery mechanism 4 includes the sewage return switching valve 29 that can return at least one of the two sludge hoppers 2 and return the sewage 6, the sewage sludge 5 in each sludge hopper 2 is provided. The return to each sludge hopper 2 can be adjusted according to the state.

  Further, since the sewage return pipe 34 for sending the sewage 6 in the sludge introduction pipe 17 to the sewage collection tank 3 is provided, the sewage 6 in the sludge introduction pipe 17 can be directly collected in the sewage collection tank 3, and the sludge introduction A large amount of sewage 6 generated during the cleaning of the tube 17 can be easily treated.

  Since the sludge introduction pipe 17 is inclined upward from the sewage collection tank 3 to the dry rotary kiln 18, the sewage 6 in the sludge introduction pipe 17 is collected by its own weight without using a pump or the like. It can be collected in the tank 3.

  Furthermore, since the water-containing sludge 5 or the cleaning water is sent upward from the lower side of the sludge introduction pipe 17, the air escapes upward so that the air does not easily accumulate in the pipe, and the water-containing sludge 5 is easily pumped and supplied with cleaning water. It becomes easy to do.

  In the above embodiment, the circulation device provided in the sewage recovery tank 3 has been described only when the stirring blade 10 is used. However, the present invention is not limited to this. It is also possible to provide a circulation pipe provided with a pump and circulate the sewage 6 collected in the sewage collection tank 3. Moreover, the effect of preventing freezing can be improved by providing a heat source device such as a heater on the outer periphery of the sewage recovery tank 3 or the circulation pipe.

  Moreover, in the said embodiment, although demonstrated only when the level meter 39 which measures the quantity of the sewage 6 was respectively used for the storage pit 30 and the sewage collection tank 3, it is not limited to this, For example, sludge hopper It is possible to automatically measure the moisture concentration of the hydrated sludge 5 in the sensor 2 with a sensor or the like, and automatically control the amount of sewage returned from the sewage recovery tank 3 based on a signal from the sensor or the like. It is.

  And in the said embodiment, although demonstrated only when the sewage return pipe | tube 7 was connected to the two sludge hoppers 2, it is not limited to this, For example, it connects to the 1 or 3 or more sludge hoppers 2 Even if it does, it can respond.

  Furthermore, in the above embodiment, only the case where only the sewage 6 is returned from the sewage recovery tank 3 to the sludge hopper 2 has been described. However, the present invention is not limited to this. For example, the sludge collected at the bottom of the sewage recovery tank 3 Even if a sludge return pump for extracting and returning the sludge to the sludge hopper 2 is installed, it can be handled.

  Moreover, in the said embodiment, although only the case where the hydrous sludge 5 of the sludge hopper 2 was thrown into the kiln bottom part 19a of the dry-type rotary kiln 18 was demonstrated, it is not limited to this, For example, a calcining furnace, the preheater 23 lowest part It is possible to respond to the case where it is put into the rising duct 23b or after the water-containing sludge 5 is dried and then put into the dry rotary kiln 18.

  The sewage sludge transported from the sewage treatment plant can be used in a sludge treatment facility that directly or after drying is put into a cement kiln for treatment.

DESCRIPTION OF SYMBOLS 1 Sludge processing equipment 2 Sludge hopper 3 Sewage collection tank 4 Sewage collection mechanism 5 Hydrous sludge 5a Top part 6 Sewage 6a Sewage 7 Sewage return pipe 7a Sprinkling part 7b In-pipe waterway 7c Baffle plate 8 Truck 8a Carriage base 9 Loading port 9 )
11 Nozzle (watering device)
12 Underground pit 13 Cement production facility (cement production process)
15 Sludge receiving equipment

Claims (3)

The sludge hopper that stores the sewage sludge transported by the truck from the sewage treatment plant or the sewage recovery tank that collects the sewage when the piping in the sludge treatment facility is washed, and the sewage return that sends water from the sewage recovery tank to the sludge hopper In a sludge treatment facility that has a sewage recovery mechanism consisting of a pipe and that treats the hydrated sludge stored in the sludge hopper through a cement manufacturing process,
The water-sludge part on the sludge hopper side of the sludge return pipe has the water-containing sludge into the sludge hopper by the truck so that the sewage is sprinkled on the top of the water-containing sludge accumulated in a mountain shape in the sludge hopper. The pipe water channel is arranged in the vertical direction, and the baffle plate is horizontally arranged at a position spaced downward from the lower end of the watering part. Sludge treatment equipment. The sludge treatment facility according to claim 1, wherein the sewage recovery tank is provided with a circulation device that circulates the stored sewage to prevent freezing . The sludge treatment facility according to claim 1 or 2, wherein a watering device for washing the truck with washing water is disposed after the hydrous sludge is put into the sludge hopper .

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