Pulverized coal furnace sludge blending combustion device

Abstract

The utility model discloses a pulverized coal furnace sludge blending combustion device in the field of sludge disposal technology and energy utilization, which comprises a base and ground feet connected with the bottom of the base, a combustion-supporting tank is connected with the top of the base, a shell is connected with the top of the base, a circulating pipe is connected with the outer cambered surface of the side surface of the shell, and a feeding hopper is connected with the bottom of the shell. According to the sludge blending combustion device, the problems existing in the existing sludge blending combustion technology are solved, the sludge treatment efficiency and the energy utilization rate are improved, the environmental pollution is reduced, the energy consumption is reduced, and the environmental pollution is reduced. According to the device, sludge raw materials entering from the bottom can be fully heated and combusted through the annular ignition structure, so that the raw materials are fully combusted, and the combustion utilization rate of the sludge raw materials is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to sludge disposal technology and energy utilization technical field especially is concerned with a kind of coal powder furnace sludge blending combustion device. BACKGROUND

[0002] Sludge is the product generated along with sewage treatment process, which contains a large amount of organic matter, rich nitrogen, phosphorus, nutrients, metals and various microorganisms, and must be properly treated and disposed. The existing sludge disposal methods in Chongqing mainly include direct transportation to landfill after simple dewatering or disposal by cement kiln, and the part disposed by landfill has not yet reached the requirements of safe, reliable and environmentally friendly harmless treatment, and occupies a large amount of valuable land resources, with huge social cost.

[0003] Chinese patent with publication number CN216039213U discloses a device for blending and burning municipal sludge in a coal powder furnace of a thermal power plant, which comprises a drying machine and a pre-drying mixing device. The top of the pre-drying mixing device is a sludge inlet, and the bottom is a sludge outlet. The pre-drying mixing device is inclined relative to the drying machine. The sludge outlet of the pre-drying mixing device is connected to the feed inlet of the drying machine. A rotary distributor is arranged near the sludge outlet of the pre-drying mixing device. A plurality of injectors are arranged near the sludge inlet end of the pre-drying mixing device. The rotary distributor has a spiral blade structure. The injectors are connected to a high-temperature flue gas source. The drying efficiency of the drying machine is improved, and the energy consumption of sludge incineration is reduced. This is conducive to the resource-based, harmless and reduced treatment of sludge.

[0004] However, the above-mentioned disclosed scheme has the following disadvantages: in actual use, the above-mentioned scheme processes the sludge by the drying device to realize the effect of burning for power generation. In actual use, the above-mentioned device adopts a single-point combustion mode, which has problems such as uneven burning of raw materials or inconvenience in collecting combustion heat. SUMMARY

[0005] This section aims to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] The utility model aims at the technical problems in the background art, and proposes a coal powder furnace sludge blending combustion device. The utility model solves the problems in the existing sludge blending combustion technology, improves the treatment efficiency and energy utilization rate of sludge, and reduces environmental pollution. The annular ignition structure of the device can make the sludge raw materials entering from the bottom fully heated and burned, so that the raw materials are fully burned, and the burning utilization rate of sludge raw materials is improved.

[0007] The utility model provides a kind of coal powder furnace sludge blending combustion device, including base and its bottom is connected with footing, the base top is connected with combustion-supporting tank, base top is connected with shell, shell side outer arc surface is connected with circulating pipe, shell bottom is connected with feeding hopper, another end of feeding hopper is connected with feeding component, shell top is connected with flue, another end of flue is connected with filter component, and feeding component top is connected with feed hopper.

[0008] By adopting the above technical scheme, the shell and the circulating pipe can effectively improve the heat utilization rate of the device, and the heat inside the shell can be led out through the circulating pipe, thereby reducing the difficulty of docking the device with an external heat power generation device.

[0009] Preferably, the filter component includes a filter shell connected to one end of the flue, a support rod connected to the bottom of the filter shell, the support rod connected to the base, a water baffle connected to the top of the filter shell, a filter screen connected to the inner wall of the filter shell, and the filter screen cover arranged on the flue.

[0010] By adopting the above technical scheme, the combination of the filter shell and the filter screen can achieve the flue gas filtering effect of the device, thereby ensuring the environmental protection effect of the device and avoiding air pollution.

[0011] Preferably, the feeding component includes a feeding shell connected to the bottom of the feeding hopper, a threaded feeding rod rotatably connected to the inner wall of the feeding shell, the outer end surface of the threaded feeding rod in contact with the inner arc surface of the feeding shell, a rotating motor connected to the other end of the threaded feeding rod, a motor bracket connected to the side of the rotating motor, the motor bracket connected to the bottom of the base, and the feeding shell top penetratingly connected with the feed hopper.

[0012] By adopting the above technical scheme, the combination of the rotating motor and the spiral feeding rod can control the speed of sludge entering the shell by controlling the rotating speed of the rotating motor, thereby facilitating the control of the feeding speed of the device, and the center bottom feeding mode can achieve the effect of heating the sludge in all directions, thereby making the sludge burn more fully.

[0013] Preferably, the combustion-supporting tank is provided with high-pressure combustion-supporting gas, the inner arc surface of the shell is connected with a ring-shaped connecting piece, one end of the ring-shaped connecting piece is connected with the combustion-supporting tank through a connecting pipe, a plurality of circumferentially distributed spray heads are arranged on the top of the ring-shaped connecting piece, and the spray heads are directed towards the center of the shell.

[0014] By adopting the above technical scheme, the combination of the ring-shaped connecting piece and the spray head can achieve the effect of heating the sludge in all directions, thereby making the sludge heat evenly and burn fully.

[0015] Preferably, the top of the shell is provided with a cover plate, the bottom of the cover plate is provided with a sealing element, the sealing element is connected with the top of the shell at the joint, and the cover plate is connected with the flue.

[0016] By adopting the technical scheme, the structure of the sealing element can avoid the risk of flue gas leakage of the device, and ensure the filtering stability of the device.

[0017] Preferably, the filter screen is in an inverted U shape, the bottom of the filter screen is provided with a mounting connector, and the inner wall of the filter shell is provided with a mounting groove.

[0018] By adopting the technical scheme, the structure of the mounting connector can ensure that the filter screen can be quickly mounted on the device, and the difficulty of replacing the filter screen of the device is reduced.

[0019] In summary, the utility model has at least one of the following beneficial effects:

[0020] The combination of the flue and the filtering component can filter the flue gas generated by the combustion of sludge, thereby avoiding the influence of the device on the air environment, the spiral feeding rod and the feeding shell at the bottom of the device can effectively improve the sludge feeding stability of the device, and the rotating motor can realize the feeding stability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0022] Figure 1 It is a front view of the embodiment of the utility model for a coal powder furnace sludge blending combustion device.

[0023] Figure 2 It is a structural schematic view of the shell in the embodiment of the utility model.

[0024] Figure 3 It is a structural schematic view of the combustion-supporting tank in the embodiment of the utility model.

[0025] Figure 4 It is a structural schematic view of the spiral feeding rod in the embodiment of the utility model.

[0026] Figure 5 It is a structural schematic view of the annular connecting piece in the embodiment of the utility model.

[0027] Reference numerals: 1. Base; 2. Foot; 3. Combustion tank; 4. Shell; 5. Circulation pipe; 6. Feed hopper; 7. Feeding hopper; 8. Flue; 9. Filter component; 901. Filter shell; 902. Support rod; 903. Water baffle; 904. Filter screen; 10. Feeding component; 1001. Feeding shell; 1002. Threaded feeding rod; 1003. Rotary motor; 1004. Motor bracket; 11. Annular connector; 12. Nozzle. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-5 The present invention will be described in further detail below.

[0029] Example 1

[0030] like Figures 1-5 As shown in the figure, in order to solve the existing problems, this utility model discloses a sludge co-firing device for pulverized coal furnace, including a base 1 and a foot 2 connected to its bottom. A combustion aid tank 3 is connected to the top of the base 1. A shell 4 is connected to the top of the base 1. A circulation pipe 5 is connected to the outer arc surface of the side of the shell 4. A feeding hopper 7 is connected to the bottom of the shell 4. A feeding component 10 is connected to the other end of the feeding hopper 7. A flue 8 is connected to the top of the shell 4. A filter component 9 is connected to the other end of the flue 8. The feeding hopper 7 is connected to the top of the feeding component 10.

[0031] The filter component 9 includes a filter housing 901 connected to one end of the flue 8, a support rod 902 connected to the bottom of the filter housing 901, the bottom of the support rod 902 being connected to the base 1, a baffle plate 903 connected to the top of the filter housing 901, and a filter screen 904 connected to the inner wall of the filter housing 901, which covers the flue 8.

[0032] The feeding component 10 includes a feeding housing 1001 connected to the bottom of the feeding hopper 7. A threaded feeding rod 1002 is rotatably connected to the inner wall of the feeding housing 1001. The outer end face of the threaded feeding rod 1002 contacts the inner arc surface of the feeding housing 1001. The other end of the threaded feeding rod 1002 is connected to a rotating motor 1003. A motor bracket 1004 is connected to the side of the rotating motor 1003. The motor bracket 1004 is connected to the bottom of the base 1. A feed hopper 6 is connected through the top of the feeding housing 1001.

[0033] The combustion-supporting tank 3 is equipped with high-pressure combustion-supporting gas. The inner arc surface of the shell 4 is connected to an annular connector 11. One end of the annular connector 11 is connected to the combustion-supporting tank 3 through a connecting pipe. The top of the annular connector 11 is provided with several nozzles 12 distributed in a circular pattern, with the nozzles 12 facing the center of the interior of the shell 4.

[0034] The top of the shell 4 is provided with a cover plate, the bottom of the cover plate is provided with a sealing element, the sealing element is connected with the top joint of the shell 4, and the cover plate is connected with the flue 8.

[0035] The filter screen 904 is in inverted U shape, the bottom of the filter screen 904 is provided with a mounting connector, and the inner wall of the filter shell 901 is provided with a mounting groove.

[0036] The specific working principle is: through the device, the stability of the sludge combustion power generation process can be effectively improved, and compared with the traditional device, the utilization rate of sludge combustion power generation can be effectively improved.

[0037] When the device is used, the raw material of sludge is put into the device from the feeding hopper 6, the feeding effect of the raw material is realized through the feeding component 10, the structure of the threaded feeding rod 1002 driven by the rotating motor 1003 is rotated to realize the effect of pushing the sludge into the feeding hopper 7, and then the sludge is injected from the inside of the shell 4 into the inside of the shell 4, at this time, the combination of the combustion aid tank 3 and the annular connecting piece 11 can spray fire through the nozzle 12 to ignite the sludge, the sludge is heated in all directions in the shell 4, so that the sludge is fully burned, at the same time, the flue gas generated by the combustion of the sludge enters the filter component 9 through the top flue 8, the flue gas is filtered through the filter screen 904, so as to avoid the pollution of the air environment of the device, and the circulating water can be injected into the interlayer of the shell 4 through the structure of the circulating pipe 5 on the side of the shell 4, so as to lead out the heat generated in the shell 4 by combustion, thereby facilitating the heat utilization of the device.

[0038] Example two

[0039] As Figures 1-5 shown, in order to solve the existing problems, based on the same concept as the above embodiment one, the following specific embodiments are also included in this embodiment:

[0040] The project utilizes two existing 1100 tons / hour coal-fired boilers to co-process municipal sludge, the moisture content of the sludge is about 80%, the daily blending and burning amount is 200 tons, and the annual blending and burning amount is 60,000 tons. The project newly builds a sludge bin with a pit (effective volume 60 cubic meters), a sludge conveying system and an odor collection and treatment system. The sludge is fully enclosed and transported to the sludge bin, conveyed to the coal crushing interval by the spiral conveying system, enters the coal conveying belt after the coal crushing interval, enters the coal mill, and finally enters the boiler for blending and burning.

[0041] The sludge transported by the sludge transport dumper is unloaded into the underground wet sludge bin. The upper part of the wet sludge bin is provided with a grid, a cover plate and an electro-hydraulic push rod. The wet sludge storage is provided with one ground buffer bin with an effective bin capacity of 20m 3 .

[0042] The screw pump is used to transport the sludge in the underground wet sludge tank, and one is provided, with a single flow of 20 m 3 / h, and a head of 2.4 MPa. The standby pump uses a seamless steel pipe to transport to the ground buffer tank, and then the sludge in the buffer tank is transported to the 12.6 m platform by the shaftless screw conveying device, and finally transported to the coal mill drop pipe at the front end of the 1# and 2# coal-fired units by the screw pump.

[0043] The sludge mixing and burning device of the pulverized coal furnace is provided with an automatic cleaning device to prevent the material bin from being muddy. The underground wet sludge tank has a pit depth of 4 meters, and the lowest point of the pit is provided with a drainage pump pool and a sewage pump and corresponding pipes and valves. The pump is automatically started and stopped according to the water level.

[0044] The wet sludge is transported by screw pump, and three are provided, of which the 12.6 m platform screw pump has a single flow of 10 m 3 / h, and a head of 1.2 MPa. The underground sludge tank uses a screw pump with a flow of 20 m 3 / h, and a head of 2.4 MPa. Most of the whole is transported to the coal mill drop pipe at the front end of the 1# and 2# units by a seamless steel pipe for uniform mixing. The 1# unit uses multiple high-power screw pumps for transportation.

[0045] The sludge of the project is transported to the coal mill drop pipe at the front end of the 1# and 2# units by a seamless steel pipe for uniform mixing, and is incinerated by the existing coal-fired boiler of Shichuan Power Plant.

[0046] The main source of malodorous gas is the wet sludge tank and the sludge storage and transportation system. The underground wet sludge tank pit is designed with a ventilation system and is equipped with an online toxic gas and oxygen detection instrument. An air replacement fan is provided on the ground, which collects and sends the replaced gas from the underground wet sludge tank, pit and ground buffer tank to the coal-fired boiler for incineration. The wet sludge tank drop port is provided with an electric gate valve, and the coal drop pipe is provided with a manual ball valve. The whole valve is closed, and the sludge transportation forms a whole closed system. The malodorous gas from each air inlet of the wet sludge mixing and burning line is introduced into the B air inlet of the 2# furnace air fan and then into the coal-fired boiler for incineration. The treated waste gas is discharged through the exhaust pipe; before the power plant is stopped, the wet sludge tank is cleaned, and no sludge is stored.

[0047] The sludge mixing and burning device of the pulverized coal furnace adopts a "closed negative pressure + fixed point extraction" gas collection method. The sludge unloading place is provided with a closed room composed of the bottom of the column of the ground temporary buffer tank and the bottom of the underground wet sludge tank, with a space volume of about 80 m3. When the sludge is unloaded, the closed room air extraction facility is opened. The underground wet sludge tank is provided with a hydraulic push rod cover plate, which is opened only when the sludge is unloaded; the ground temporary buffer tank is closed, and when the amount of incoming sludge exceeds the capacity of the underground wet sludge tank, it is temporarily stored in the ground temporary buffer tank. The underground wet sludge tank and the wet sludge pit are both used for negative pressure collection of malodorous gas; the sludge is transported by a seamless steel pipe in a closed manner.

[0048] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pulverized coal boiler sludge blending device, comprising a base (1) and a foot (2) connected to the bottom of the base, characterized in that, The base (1) top is connected with combustion tank (3), the base (1) top is connected with shell (4), shell (4) side outer arc surface is connected with circulating pipe (5), shell (4) bottom is connected with feeding hopper (7), feeding hopper (7) other end is connected with feeding component (10), shell (4) top is connected with flue (8), flue (8) other end is connected with filter component (9), feeding component (10) top is connected with feeding hopper (7).

2. A device for burning sludge in a pulverized coal furnace according to claim 1, characterized in that, The filter component (9) includes filter shell (901) connected with one end of the flue (8), the filter shell (901) bottom is connected with support rod (902), the support rod (902) bottom is connected with the base (1), the filter shell (901) top is connected with the water baffle (903), the filter shell (901) inner wall is connected with filter screen (904), the filter screen (904) cover is arranged on the flue (8).

3. A device for burning sludge in a pulverized coal furnace according to claim 2, characterized in that, The feeding component (10) includes feeding shell (1001) connected with the bottom of the feeding hopper (7), the feeding shell (1001) inner wall is rotatably connected with the threaded feeding rod (1002), the threaded feeding rod (1002) outer end surface is in contact with the inner arc surface of the feeding shell (1001), the threaded feeding rod (1002) other end is connected with the rotating motor (1003), the rotating motor (1003) side is connected with the motor support (1004), the motor support (1004) is connected with the base (1) bottom, the feeding shell (1001) top is connected with the feeding hopper (6).

4. The coal powder furnace sludge blending combustion device according to claim 3, characterized in that, The combustion tank (3) is internally provided with high-pressure combustion gas, the inner arc surface of the shell (4) is connected with the annular connecting piece (11), one end of the annular connecting piece (11) is connected with the combustion tank (3) through the connecting pipe, the annular connecting piece (11) top is provided with a plurality of circumferentially distributed spray heads (12), the spray head (12) is directed to the center of the shell (4) interior.

5. A device for burning sludge in a pulverized coal furnace according to claim 4, characterized in that, The shell (4) top is provided with a cover plate, the cover plate bottom is provided with a sealing element, the sealing element is connected with the joint of the shell (4) top, the cover plate is connected with the flue (8) through.

6. A coal powder furnace sludge blending combustion device according to claim 5, characterized in that, The filter screen (904) is inverted U-shaped, the filter screen (904) bottom is provided with a mounting connector, the filter shell (901) inner wall bottom is provided with a mounting groove, the mounting connector is connected with the mounting groove.

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