Sludge feeding device

Abstract

The present invention discloses a sludge feeding device, comprising: a sludge pushing power device, used to receive sludge and transport it to an incinerator through a sludge pushing channel; a variable diameter sludge discharging device, used to receive the sludge output from the sludge pushing power device, and increase or decrease the sludge passing capacity entering the incinerator; an isolation pushing device, which pushes the sludge coming out of the variable diameter sludge discharging device into the incinerator; an auxiliary unblocking device, used to clear the blocked channel; a coordination control system, used to control the sludge pushing power device, the variable diameter sludge discharging device, the isolation pushing device and the unblocking device to coordinately send the sludge into the incinerator. The present invention sends the sludge that has undergone preliminary pressure filtration into the boiler, so that the sludge is not dried, has no odor diffusion, does not affect the surrounding environment, and can be controlled to enter the furnace for incineration in real time.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a sludge furnace feeding device. Background Art

[0002] The sludge produced after industrial wastewater treatment, if used for incineration in a boiler, is currently generally mixed with raw coal and the sludge is then incinerated in the boiler along with the raw coal.

[0003] At present, large enterprises with self-provided power plants generally have industrial sewage treatment plants or supporting boilers and sewage treatment in industrial areas. The industrial sludge with a moisture content of about 60% produced by them has passed the environmental impact assessment, mixed with raw coal, and sent to the circulating fluidized bed boiler of their self-provided power plants for incineration. Because the sludge is sticky and has a high moisture content, it will affect the passage of raw coal into the furnace, seriously affecting the passage of raw coal into the furnace, causing a large number of coal outages and coal blockages, affecting factory operations and production, and causing large fluctuations in environmental emission data; in order to ensure the environmental parameters of flue gas emissions, a large amount of environmental treatment raw materials are added at all times; and the sludge mixed with raw coal enters the furnace for combustion, which has a large restriction on the furnace type of the boiler and poor adaptability.

[0004] A large number of coal breaks and coal blockages occur during the process of entering the incinerator. This phenomenon may affect production, cause economic losses and abnormal changes in boiler flue gas environmental emission parameters; in severe cases, it may cause the system to shut down, causing major economic losses and excessive boiler flue gas environmental emission parameters, and even boiler safety accidents. Sludge is mixed with raw coal and incinerated in the furnace, and the amount of sludge added has relatively high requirements on the moisture content of raw coal or sludge. In order to increase the amount of sludge mixed with raw coal, some manufacturers dry the sludge. At this time, if low-temperature drying is used, the production efficiency is very low. If high-temperature drying is used: first, the energy utilization efficiency is low; second, there is odor and dust, and it is necessary to increase environmental protection treatment facilities and corresponding operating costs accordingly; third, the tail gas is difficult to handle, which is easy to cause secondary pollution and is not environmentally friendly. In the prior art, there is also a furnace incineration process that uses sludge to add water and other dilution pumps. This process has the following shortcomings: first, the adaptability of pumping to the moisture content of sludge is relatively narrow; second, the dilution method greatly increases the moisture content, which makes boiler combustion uneconomical and increases coal consumption; third, it increases the load of the fan; fourth, the flue gas has a high moisture content, and the high-water content flue gas with complex components is highly corrosive to the equipment, and the maintenance cost of the boiler and its ancillary equipment increases sharply. A large amount of sludge is produced in industry every day, and it is urgent to solve the problem of existing sludge incineration. Summary of the invention

[0005] In view of the above problems, the present invention proposes a sludge feeding device, which mainly solves the problems of coal breaking and coal blocking caused by sludge entering the furnace in the prior art and the problem of high energy consumption in the method of diluting sludge by pumping it into the furnace.

[0006] The present invention provides a sludge feeding device, comprising:

[0007] A sludge pushing power device, used to receive the sludge and transport it to the incinerator through the sludge pushing channel;

[0008] The variable diameter sludge discharge device is used to receive the sludge output from the sludge pushing power device and increase or decrease the sludge passing capacity entering the incinerator;

[0009] The isolation pushing device pushes the sludge coming out of the variable diameter sludge discharging device into the incinerator;

[0010] Auxiliary unblocking device, used to clear blocked passages;

[0011] The coordinated control system is used to control the sludge pushing power device, the variable diameter sludge discharging device, the isolation pushing device and the unblocking device to coordinate and send the sludge into the incinerator.

[0012] Furthermore, the sludge pushing power device is a screw conveyor, the screw conveyor is controlled to rotate by a motor, and a funnel for collecting sludge is fixedly installed at the feed inlet of the screw conveyor.

[0013] Furthermore, the variable diameter sludge discharge device includes at least one sludge discharge channel with an independent valve switch, and the coordination control system controls the opening or closing of the sludge discharge channel; the sludge discharge channel runs through the sludge pushing channel and intersects with each other, and the sludge is transported from the sludge discharge channel on the gravity direction side.

[0014] Furthermore, there are two sludge discharge channels, including a first discharge channel and a second discharge channel; the first discharge channel is controlled to be opened or closed by a first discharge valve; the second discharge channel is controlled to be opened or closed by a second discharge valve; the sludge discharge channel and the sludge push channel are cylindrical channels, and their axes are perpendicular to each other.

[0015] Furthermore, the isolation pushing device is a wind blowing system, and the wind blows the sludge into the incinerator; the isolation pushing device includes a main pushing channel and an auxiliary pushing channel; the main pushing channel blows the sludge transported from the sludge discharge channel on the gravity side into the incinerator, and the auxiliary pushing channel is connected to the end of the sludge discharge channel without sludge output, and the auxiliary pushing channel is provided with an independent auxiliary pushing valve; the main pushing channel and the auxiliary pushing channel of the isolation pushing device are connected to the sludge discharge channel of the variable diameter sludge discharge device to form a channel connected to the wind circulation.

[0016] Furthermore, the unblocking device is a wind blowing system, including a first unblocking valve and a second unblocking valve; the first unblocking valve is connected to the main pushing channel and the unblocking device to control the unblocking of the main pushing channel; the second unblocking valve is connected to the auxiliary pushing channel and the unblocking device to control the unblocking of the auxiliary pushing channel; a main detection pressure gauge is installed on the pipeline between the main pushing channel of the isolation pushing device and the sludge discharge channel; an auxiliary detection pressure gauge is installed on the pipeline between the auxiliary pushing channel and the sludge discharge channel.

[0017] Furthermore, a guide piece is fixed in the channel at one end of the sludge discharge channel connected to the auxiliary pushing channel by a bracket, and the guide piece is a platform or a cone. The wind transported by the auxiliary unblocking device clears the sludge blocked in the sludge discharge channel under the diversion effect of the guide piece.

[0018] Furthermore, the guide member is a truncated cone, a cone, a pyramid or a prism, and the guide member is fixed in the middle of the sludge discharge channel; the surface of the guide member is smooth and the material is stainless steel.

[0019] The beneficial effects of the present invention are:

[0020] 1. The sludge inlet device is external; it does not need to build a new sludge incinerator, but can be installed at the entrance of the incinerator, matched with the existing incinerator, making full use of existing resources and improving economic benefits;

[0021] 2. The sludge entering the furnace for incineration only needs to be filtered, no drying is required, no odor is spread, and no impact is caused on the surrounding environment. The sludge is harmlessly reduced and stabilized, and the disposal process is safe and environmentally friendly;

[0022] 3. Compared with the incineration of raw coal mixed with sludge, it enters the boiler furnace through an independent channel: the viscosity and moisture of the sludge will not cause the raw coal to be cut off or blocked in the furnace, causing production and economic losses; the processing volume can be controlled in real time and is not affected by the moisture content of the raw coal or sludge;

[0023] 4. Compared with sludge drying and incineration: no additional space, labor and energy consumption are required; no tail gas emissions from the drying process;

[0024] 5. Compared with the process of diluting and pumping sludge into the furnace by adding water to the sludge: this sludge feeding device can adapt to a wider range of sludge moisture content; no water dilution pumping is required, the boiler combustion is more economical, more raw coal is saved, the load of the fan is reduced, and electricity is saved; the water content of the flue gas is reduced, the corrosion of the water-containing flue gas to the equipment is reduced, and the maintenance cost of the boiler and its ancillary equipment is reduced.

[0025] The present invention sends the sludge after preliminary filtration into the boiler, so that the sludge is not dried, odor is not diffused, and the surrounding environment is not affected, and it can be incinerated in real time in a controllable manner. In the harmless reduction and stabilization of industrial sludge, the disposal process ensures production safety, fully utilizes resources, improves economic benefits, saves energy and reduces emissions, and protects the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the principle of a sludge feeding device according to one embodiment of the present invention;

[0027] Among them: 1. sludge pushing power device; 10. motor; 2. variable diameter sludge discharging device; 20. first discharging valve; 21. first discharging channel; 22. second discharging valve; 23. second discharging channel; 24. guide piece; 25. bracket; 3. isolation pushing device; 30. main pushing channel; 31. auxiliary pushing channel; 32. auxiliary pushing valve; 4. incinerator; 5. funnel; 6. unblocking device; 60. first unblocking valve; 61. second unblocking valve; 7. main detection pressure gauge; 8. auxiliary detection pressure gauge. DETAILED DESCRIPTION

[0028] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected through an intermediate medium. It can be said that the internal connection of two components is connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments.

[0030] according to Figure 1 As shown, this embodiment proposes a sludge furnace feeding device, which uses a sludge furnace feeding machine to connect a boiler to incinerate and treat sludge in an environmentally friendly manner, including:

[0031] The sludge pushing power device 1 is a screw conveyor, which is controlled to rotate by a motor 10 or, more specifically, a stepping motor. A hopper 5 for collecting sludge is welded and fixedly installed at the feed port of the screw conveyor, and the sludge falls into the screw conveyor through the funnel 5; it is used to receive the sludge and transport it to the incinerator 4 through the sludge pushing channel. The screw conveyor has the following advantages: first, the sludge conveying amount can be controlled; second, the sludge can be transported evenly; third, the sludge acts as a seal in the spiral conveying pipeline to prevent the flame in the incinerator 4 from back-scattering, thereby ensuring a safe working environment.

[0032] The variable diameter sludge discharge device 2 is used to receive the sludge output from the sludge pushing power device 1, and increase or decrease the sludge passing capacity entering the incinerator; preferably, the variable diameter sludge discharge device 2 includes at least one sludge discharge channel with an independent valve switch, and the coordination control system controls the opening or closing of the sludge discharge channel, and controls the sludge output through the variable diameter of one inlet and two outlets or one inlet and multiple outlets, so as to adapt to and ensure the coordinated and smooth sludge inlet and outlet. Preferably, there are two sludge discharge channels, including a first discharge channel 21 and a second discharge channel 23. The first discharge channel 21 is controlled by a first discharge valve 20 to be opened or closed; the second discharge channel 23 is controlled by a second discharge valve 22 to be opened or closed; the sludge discharge channel and the sludge pushing channel of the screw conveyor are cylindrical channels, the sludge discharge channel runs through the sludge pushing channel and intersects with each other, the axes of the two are perpendicular to each other, the sludge is transported from the sludge discharge channel on the side of the gravity direction, the first discharge valve 20 is opened, and the sludge is discharged from the first discharge channel 21; when the amount of sludge output by the screw conveyor increases, the second discharge valve 22 is selected to open to increase the caliber of the sludge passing through, and the sludge is discharged from the first discharge channel 21 and the second discharge channel 23 at the same time, increasing the sludge passing amount so that the sludge will not block the channel.

[0033] The isolation pushing device 3 pushes the sludge coming out of the variable diameter sludge discharging device 2 into the incinerator 4; preferably, the isolation pushing device 3 is a wind blowing system, and the wind blows the sludge into the incinerator 4; the isolation pushing device 3 includes a main pushing channel 30 and an auxiliary pushing channel 31; the main pushing channel 30 blows the sludge transported from the sludge discharging channel on the gravity side into the incinerator 4, and uses strong wind to blow the sludge into the incinerator 4, without shaking or pushing back and forth, and can continuously push the sludge. The auxiliary pushing channel 31 is connected to the end of the sludge discharging channel without sludge output, and the auxiliary pushing channel 31 is provided with an independent auxiliary pushing valve 32, and the auxiliary pushing valve 32 is in a normally open state; the main pushing channel 30 and the auxiliary pushing channel 31 of the isolation pushing device 3 are connected to the sludge discharging channel of the variable diameter sludge discharging device 2 to form a channel that is connected to the wind circulation, ensuring the pressure balance in the pipeline, so that the sludge can be smoothly output from the sludge discharging channel and pushed into the incinerator 4.

[0034] The unblocking device 6 is a wind blowing system, and the wind pressure value is greater than the wind pressure value output by the isolation pushing device 3; it includes a first unblocking valve 60 and a second unblocking valve 61; the unblocking valves are in a normally closed state and are opened only when needed; the first unblocking valve 60 connects the main pushing channel 30 and the unblocking device 6 to control the unblocking of the main pushing channel 30; the second unblocking valve 61 connects the auxiliary pushing channel 31 and the unblocking device 6 to control the unblocking of the auxiliary pushing channel 31; a main detection pressure gauge 7 is installed on the pipeline between the main pushing channel 30 of the isolation pushing device 3 and the sludge discharge channel; an auxiliary detection pressure gauge 8 is installed on the pipeline between the auxiliary pushing channel 31 and the sludge discharge channel.

[0035] Preferably, a guide 24 is fixed in the channel at one end of the sludge discharge channel connected to the auxiliary push channel 31. The guide 24 is a table or a cone. The pressure wind clears the sludge blocked in the sludge discharge channel under the diversion effect of the guide 24. It is found through practice that when the wind blows directly from the middle of the channel, a large hole is blown out in the middle of the blocked sludge, but the sludge attached to the pipe wall will not fall off, and the blocked sludge cannot be completely cleared. The guide 24 in this embodiment is specifically a truncated table or a cone or a pyramid or a prism. The guide 24 is fixed in the middle of the sludge discharge channel through a bracket 25. The pressure wind delivered from the unblocking device 6 directly acts on the surface of the guide 24, changes the direction of the wind speed, and then blows to the pipe wall of the pipe. In this way, the sludge attached to the pipe wall is blown off, and the sludge in the middle will also be cleared. Preferably, the surface of the guide 24 is smooth and the material is stainless steel to reduce the occurrence of corrosion.

[0036] Specifically, the working principle of the unblocking device 6 is as follows: when the pressure value detected by the main detection pressure gauge 7 is greater than the preset pressure value, that is, the main pushing channel 30 is blocked, and the wind force of the isolation pushing device 3 cannot send the sludge to the incinerator, at this time, the auxiliary pushing valve 32 is closed, and the first unblocking valve 60 is opened, and the pressure wind of the unblocking device 6 blows toward the main pushing channel 30 to clear the blocked sludge; when the pressure value detected by the auxiliary detection pressure gauge 8 is greater than the preset pressure value, that is, the variable diameter sludge discharging device 2 is blocked, and the sludge cannot be discharged from the sludge discharging channel, at this time, the auxiliary pushing valve 32 is closed, and the second unblocking valve 61 is opened, and the pressure wind of the unblocking device 6 blows toward the channel where the guide member 24 is fixed to the sludge discharging channel, and the pressure wind acts on the guide member 24 to blow off the sludge, thereby unblocking the pipeline.

[0037] The coordination control system is used to control the sludge pushing power device 1, the variable diameter sludge discharging device 2, the isolation pushing device 3 and the unblocking device 6 to coordinately send the sludge into the incinerator.

[0038] Specifically, the power source of the sludge pushing power device 1 is a hydraulic motor 10 or an electric motor, and the coordinated control system controls the rotation speed of the motor 10 and thus controls the speed at which the sludge pushing power device 1 conveys sludge; the coordinated control system controls the variable-diameter sludge discharging device 2 to adaptively increase the diameter through which the sludge passes, that is, to open the discharge switch of the sludge discharging channel, so that the sludge is transported to the incinerator 4 from different diameters; the control system controls the main switch of the wind blowing of the isolation pushing device 3, and the start or close of the auxiliary pushing valve 32; the control system also controls the start-up of the unblocking device 6, and controls the start-up of the unblocking valve of the unblocking device 6 through the data fed back by the pressure gauge.

[0039] The sludge feeding device is mounted on the boiler to be used appropriately. The sludge produced after environmental protection treatment, after preliminary filtration and environmental impact assessment, enters the incinerator through the sludge feeding device to incinerate the self-produced sludge, thereby reducing transportation costs and avoiding secondary pollution during transportation. The sludge is sent to the circulating fluidized bed boiler of the factory through the internal transportation system for incineration and harmless treatment. The coal shortage and coal blockage phenomena are greatly reduced, the environmental protection flue gas emission parameters are stable, the flue gas environmental protection treatment raw materials are reduced, electricity is saved, and a virtuous circle is formed.

[0040] The above-described embodiments are merely descriptions of the embodiments of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the scope of protection of the present invention.

Claims

1. A sludge feeding device, characterized in that: include: A sludge pushing power device, used to receive the sludge and transport it to the incinerator through the sludge pushing channel; The variable diameter sludge discharge device is used to receive the sludge output from the sludge pushing power device and increase or decrease the sludge passing capacity entering the incinerator; The isolation pushing device pushes the sludge coming out of the variable diameter sludge discharging device into the incinerator; Auxiliary unblocking device, used to clear blocked passages; The coordination control system is used to control the sludge pushing power device, the variable diameter sludge discharging device, the isolation pushing device and the unblocking device to coordinate and send the sludge into the incinerator; The variable diameter sludge discharge device includes at least one sludge discharge channel with an independent valve switch, and the coordinated control system controls the opening or closing of the sludge discharge channel; the sludge discharge channel runs through the sludge pushing channel and intersects with each other, and the sludge is transported from the sludge discharge channel on one side of the gravity direction; The number of the sludge discharge channels is two, including a first discharge channel and a second discharge channel; The first discharge channel is controlled to be opened or closed by the first discharge valve; the second discharge channel is controlled to be opened or closed by the second discharge valve; the sludge discharge channel and the sludge push channel are cylindrical channels, and the axes of the two are perpendicular to each other; The isolation and pushing device is a wind blowing system, and the wind blows the sludge into the incinerator; The isolation pushing device includes a main pushing channel and an auxiliary pushing channel; The main pushing channel blows the sludge transported from the sludge discharge channel on the gravity side into the incinerator, the auxiliary pushing channel is connected to the end of the sludge discharge channel without sludge output, and an independent auxiliary pushing valve is arranged on the auxiliary pushing channel; the main pushing channel and the auxiliary pushing channel of the isolation pushing device are connected with the sludge discharge channel of the variable diameter sludge discharge device to form a channel connected with the wind circulation.

2. The sludge feeding device according to claim 1, characterized in that: The sludge pushing power device is a screw conveyor, the screw conveyor is controlled to rotate by a motor, and a funnel for collecting sludge is fixedly installed at the feed inlet of the screw conveyor.

3. The sludge feeding device according to claim 1, characterized in that: The unblocking device is a wind blowing system, including a first unblocking valve and a second unblocking valve; the first unblocking valve is connected to the main pushing channel and the unblocking device to control the unblocking of the main pushing channel; the second unblocking valve is connected to the auxiliary pushing channel and the unblocking device to control the unblocking of the auxiliary pushing channel; a main detection pressure gauge is installed on the pipeline between the main pushing channel of the isolation pushing device and the sludge discharge channel; an auxiliary detection pressure gauge is installed on the pipeline between the auxiliary pushing channel and the sludge discharge channel.

4. The sludge feeding device according to claim 1 or 3, characterized in that: A guide piece is fixed in the channel at one end of the sludge discharge channel connected to the auxiliary pushing channel by a bracket. The guide piece is a platform or a cone. The wind delivered by the auxiliary unblocking device clears the sludge blocked in the sludge discharge channel under the diversion effect of the guide piece.

5. The sludge feeding device according to claim 4, characterized in that: The guide piece is a truncated cone, a cone, a pyramid or a prism, and is fixed in the middle of the sludge discharge channel; the surface of the guide piece is smooth and is made of stainless steel.

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