Flue gas dust removal device for sludge drying

Abstract

The utility model relates to the field of sludge drying treatment, in particular to a flue gas dust removal device for sludge drying, which comprises a casing, a filter bag component, a compressed air ash removal component and a feed heating component, an air inlet is arranged at the lower end of the casing, an air outlet is arranged at the upper end of the casing, the filter bag component is arranged in the casing, and the feed heating component is arranged in the casing. The feeding heating assembly comprises a heating box, baffles and a disc-shaped heating pipe, the left side of the heating box is communicated with the air inlet, a low-temperature drying equipment smoke outlet connecting pipe is arranged at the right end of the heating box, and the baffles are fixed in the heating box at intervals in an up-down alternating mode; smoke enters the shell in an S-shaped motion path through the baffle, the disc-shaped heating pipe is arranged on the right end face of the baffle, one end of the disc-shaped heating pipe is connected with the waste heat source, the waste heat source is used for heating the smoke, the humidity of the smoke is reduced, the bag pasting risk is reduced, and therefore the filtering efficiency of a filter bag is improved, and the service life of the filter bag is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sludge drying treatment relates to a sludge drying flue gas dust removal device. BACKGROUND

[0002] With the advance of sludge reduction policy, low-temperature drying equipment has been widely used. However, its exhaust gas is high in humidity and low in temperature, and the traditional pulse bag dust collector is easy to be bagged and cannot be used normally. Therefore, the current low-temperature drying equipment mostly uses wet dust removal for dust removal, but wet dust removal has the disadvantages of high investment, many supporting facilities, high operation cost and low dust removal efficiency.

[0003] Therefore, in order to solve the problems in the prior art, a sludge drying flue gas dust removal device with simple structure and no bagging is needed. UTILITY MODEL CONTENT

[0004] The utility model discloses a sludge drying flue gas dust removal device to solve the problems in the prior art.

[0005] The utility model discloses a sludge drying flue gas dust removal device can through the following technical scheme realizes: a sludge drying flue gas dust removal device includes: casing, filter bag subassembly, compressed air ash cleaning subassembly and feeding heating subassembly, the lower extreme of casing is equipped with the gas inlet, the upper extreme of casing is equipped with the gas outlet, filter bag subassembly sets up in the inside of casing, passes through filter bag subassembly and filters the flue gas of gas inlet and exports from the gas outlet, the feeding heating subassembly includes heating box, baffle and disc -shaped heating tube, heating box left side is connected with the gas inlet and is arranged, heating box right -hand most is equipped with low -temperature drying equipment out of smoke connecting pipe, the baffle is fixed alternately in heating box inside with S type movement path, disc -shaped heating tube sets up on the right -hand face of baffle, disc -shaped heating tube one end connects the waste heat source.

[0006] Further improvement, the filter bag subassembly includes filter bag and skeleton, the skeleton is fixed in the upper end of the inside of casing and forms the air outlet area, the skeleton upper end is equipped with the ventilation opening, the filter bag is fixed in the lower end of the skeleton, and the ventilation opening is communicated with the inside of the filter bag, the gas outlet is communicated with the air outlet area.

[0007] Further improvement, the bottom of the casing is equipped with the ash bucket, the gas inlet is arranged in the right side middle part of the ash bucket, the left side of the heating box is equipped with the inclined ash discharge plate at the connecting place of the ash bucket.

[0008] Further improvement, the middle bottom plate of the heating box includes two groups of circular ash falling plates, and the circular ash falling plates are provided with ash discharge pipes at the bottom.

[0009] Further improvement, the compressed air ash cleaning assembly includes compressed air bag, pulse valve and solenoid valve control assembly and spray pipe, the compressed air bag is arranged with pulse valve and solenenoid valve control assembly at the outer end of the shell, the spray pipe is located in the shell interior and is located above the vent, and the compressed air in the compressed air bag is released from the spray pipe through pulse valve and solenoid valve control assembly, and pulse air flow is sprayed into the filter bag.

[0010] Compared with the prior art, the sludge drying flue gas dust removal device has the beneficial effects that:

[0011] By the design of the heating box, larger dust particles directly fall into the bottom of the circular ash falling plate due to inertial effect before entering the filter bag assembly, thereby reducing the amount of dust entering the filter bag and reducing the filtering burden of the filter bag; the disc-shaped heating pipe uses waste heat source to heat the flue gas, reduces the humidity of the flue gas and reduces the risk of bag sticking, thereby improving the filtering efficiency and service life of the filter bag; the design of the baffle in the heating box makes the flue gas form an S-shaped movement path, prolongs the residence time of the flue gas, increases the contact area between the flue gas and the baffle, and further improves the pretreatment effect of the dust. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view of the utility model

[0013] Fig. 2 It is a structural schematic view of the utility model partial enlarged view

[0014] Fig. 3 It is a structural schematic view of the disc-shaped heating pipe in the utility model

[0015] In the drawing, 1 is a shell, 11 is an air inlet, 13 is an air outlet, 14 is an ash hopper, 2 is a filter bag assembly, 21 is a filter bag, 22 is a skeleton, 221 is a ventilation opening, 222 is an air outlet area, 3 is a compressed air ash cleaning assembly, 31 is a compressed air bag, 32 is a pulse valve and solenoid valve control assembly, 33 is a spray pipe, 4 is a feeding heating assembly, 41 is a heating box, 411 is an inclined ash falling plate, 412 is a bottom plate, 413 is a circular ash falling plate, 414 is an ash discharge pipe, 42 is a baffle, 43 is a disc-shaped heating pipe, and 5 is a low-temperature drying equipment smoke outlet connecting pipe. DETAILED DESCRIPTION

[0016] In the description of the utility model, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model.

[0017] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, term '' install '' '' link '' '' connection '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect. For ordinary skilled person in the art, the above-mentioned term can be understood in the specific meaning in the utility model according to specific circumstances.

[0018] The following will be described in conjunction with the embodiments and the drawings Figs. 1-3 The technical scheme of the utility model is further described.

[0019] Example 1

[0020] A kind of sludge drying flue gas dust removal device, comprising: shell 1, filter bag assembly 2, compressed air ash cleaning component 3 and feed heating component 4, the lower end of the shell 1 is equipped with air inlet 11, the upper end of the shell 1 is equipped with air outlet 13, the filter bag assembly 2 is set to the inside of shell 1, the flue gas of air inlet 11 is filtered from air outlet 13 after being discharged by filter bag assembly 2, the feed heating component 4 includes heating box 41, baffle 42 and disc-shaped heating tube 43, the heating box 41 left side is communicated with air inlet 11 arrangement, the heating box 41 right end is equipped with low-temperature drying equipment smoke connection pipe 5, the baffle 42 is fixed alternately in the inside of heating box 41, flue gas is entered into shell 1 with S type movement path by baffle 42, the disc-shaped heating tube 43 is set to the right end face of baffle 42, and the disc-shaped heating tube 43 one end is connected waste heat source.

[0021] As a further preferred embodiment, the filter bag assembly 2 includes filter bag 21 and skeleton 22, the skeleton 22 is fixed to the upper end of the inside of shell 1 to form the air outlet area 222, the skeleton 22 upper end is equipped with air vent 221, the filter bag 21 is fixed to the lower end of the skeleton 22, and the filter bag 21 is communicated with the air vent 221, and the air outlet 13 is communicated with the air outlet area 222. The filter bag assembly is fixed in the shell by the skeleton, forming an air outlet area, the flue gas is filtered by the filter bag and then enters the air outlet area, and then is discharged from the air outlet. The flue gas can be evenly distributed during the filtering process, improving the filtering efficiency, reducing the burden on the filter bag, and prolonging the service life of the filter bag.

[0022] As a further preferred embodiment, the bottom of the shell 1 is equipped with ash bucket 14, the air inlet 11 is arranged on the right side of the middle of the ash bucket 14, and the left side of the heating box 41 is equipped with inclined ash discharge plate 411 at the connection with the ash bucket 14. The design of the ash bucket and the inclined ash discharge plate effectively prevents dust accumulation, maintains the cleanliness of the device, improves the dust removal effect, and reduces maintenance costs.

[0023] As a further preferred embodiment, the bottom plate 412 in the heating box 41 comprises two groups of circular dust falling plates 413, which are provided with dust discharge pipes 414 at the bottom, further optimizing the collection and discharge of dust, reducing the accumulation of dust in the device, and improving the operation efficiency and maintenance convenience of the device.

[0024] As a further preferred embodiment, the compressed air dust cleaning assembly 3 comprises a compressed air pack 31, a pulse valve and solenoid valve control assembly 32 and a blowing pipe 33, the compressed air pack 31 and the pulse valve and solenoid valve control assembly 32 are arranged at the outer end of the shell 1, and the blowing pipe 33 is located inside the shell 1 and above the ventilation opening 221, the compressed air in the compressed air pack 31 is released from the blowing pipe 33 through the pulse valve and solenoid valve control assembly 32, a pulse air flow is injected into the filter bag 21, the filter bag is sharply expanded and vibrates, the dust layer falls off and falls into the hopper, the permeability of the filter bag is maintained, the dust removal efficiency is improved, the service life of the filter bag is prolonged, and the operation cost is reduced.

[0025] As shown in Figs. 1-3 the use principle of the utility model is:

[0026] The present application is a modification of the existing pulse bag filter, which usually does not have a fan. The inlet 11 and the outlet 13 are equipped with fans to drive the dust-containing gas through the filter for filtration and purification.

[0027] First, the flue gas enters the heating box 41 from the low-temperature drying equipment smoke connection pipe 5, and the larger dust particles directly fall into the bottom of the circular dust falling plate 41 due to the inertial effect. The heating box 41 is provided with baffles 42, which are fixed alternately at the top and bottom, so that the flue gas forms an S-shaped movement path in the heating box, prolonging the residence time of the flue gas and increasing the contact area between the flue gas and the baffle. The disc-shaped heating pipe 43 is arranged on the right end face of the baffle 42, and can also be arranged on the left end face again to increase the heating temperature. One end of the disc-shaped heating pipe is connected to a waste heat source, which is the waste heat in the plant or the waste heat of the drying equipment as the heat source of the dust removal device. The disc-shaped heating pipe heats the flue gas to increase the temperature and reduce the humidity of the flue gas, thereby reducing the risk of bag sticking of the filter bag.

[0028] After heating, the flue gas enters the inside of the shell 1 through the left end of the heating box 41. After the flue gas enters the shell 1, the larger dust particles directly fall into the bottom of the hopper 14 due to the inertial effect. The flue gas is filtered by the filter bag assembly 2, and when the flue gas passes through the filter bag 21, the dust is intercepted by the filter bag, and the clean gas enters the air outlet area 222 through the filter bag and is finally discharged from the air outlet 13.

[0029] When the dust on the surface of the filter bag accumulates to a certain extent, resulting in the increase of the resistance of the dust collector, the control system triggers the ash removal process, the pulse valve and the electromagnetic valve control assembly 32 is opened, the compressed air is injected into the filter bag through the blowing pipe 44 to generate a pulse airflow, so that the filter bag expands sharply and vibrates, and the dust layer falls off and falls into the ash bucket.

[0030] The above describes the preferred embodiments of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A flue gas dedusting device for sludge drying, characterized by, The utility model relates to a kind of low-temperature drying equipment, including: shell, filter bag assembly, compressed air ash cleaning assembly and feed heating assembly, the lower end of the shell is equipped with air inlet, the upper end of the shell is equipped with air outlet, the filter bag assembly is arranged in the inside of shell, the flue gas of air inlet is filtered by filter bag assembly and is discharged from air outlet, the feed heating assembly includes heating box, baffle and disc-shaped heating pipe, the left side of the heating box is communicated with air inlet arrangement, the right end of the heating box is equipped with low-temperature drying equipment smoke connection pipe, the baffle is fixed in the inside of heating box alternately spaced, flue gas is entered into shell with S type movement path by baffle, the disc-shaped heating pipe is arranged on the right end surface of baffle, and one end of the disc-shaped heating pipe is connected with waste heat source. The filter bag assembly includes filter bag and framework, the framework is fixed to the upper end of the inside of shell to form air outlet area, the framework is equipped with air vent spaced on the upper end, the filter bag is fixed to the lower end of framework spaced, and the filter bag is communicated with air vent arrangement in the inside, and the air outlet is communicated with air outlet area.

2. The flue gas dedusting device for sludge drying according to claim 1, characterized in that, The bottom of the shell is equipped with ash hopper, the air inlet is arranged in the right middle part of ash hopper, and the left side of the heating box is equipped with inclined ash removal plate at ash hopper connection place.

3. The flue gas dedusting device for sludge drying according to claim 1, characterized in that, The middle bottom plate of the heating box includes two groups of circular ash removal plates, and the bottom of the circular ash removal plate is equipped with ash removal pipe.

4. The flue gas dedusting device for sludge drying according to claim 1, characterized in that, The compressed air ash cleaning assembly includes compressed air bag, pulse valve and solenoid valve control assembly and spray pipe, the compressed air bag is arranged with pulse valve and solenoid valve control assembly at the outer end of shell, the spray pipe is located in the inside of shell and is located above air vent, and compressed air in compressed air bag is released from spray pipe by pulse valve and solenoid valve control assembly, and pulse airflow is jetted in filter bag.

5. The flue gas dedusting device for sludge drying according to claim 1, characterized in that, ​

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