Injection type pulse injection ash removal structure

Abstract

The utility model relates to the technical field of heat accumulator ash removal, in particular to an injection type pulse injection ash removal structure. The ash removal structure comprises a heat storage box, an air inlet pipeline and an injection type pulse assembly. The heat storage box is communicated with the air inlet pipeline; the air inlet pipeline is connected with an external air blower; a heat storage body is accommodated in the heat storage box; one end of the injection type pulse assembly is an air inlet, is arranged outside the air inlet pipeline and is communicated with compressed air, and the other end of the injection type pulse assembly is an air nozzle, is arranged in the air inlet pipeline and is arranged in the same direction as the air inlet flow direction; the injection type pulse assembly further comprises a pulse valve arranged between the air inlet and the air nozzle. According to the utility model, the ash removal operation of the heat accumulator can be completed at low cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heat accumulator dust cleaning technical field, specifically relates to a kind of injection pulse jet dust cleaning structure. BACKGROUND

[0002] Heat accumulator is the energy storage component commonly used in combustion furnace, generally set in heat storage tank, and is connected with flue gas duct, for recycling and storing the heat in flue gas. Because flue gas contains dust, so that heat accumulator is blocked after long-term use Dust flow channel of heat accumulator, increase the resistance of air intake and flue gas. Therefore, it is necessary to clean dust of heat accumulator regularly.

[0003] The existing dust cleaning scheme is mostly to store compressed gas in pressure tank, is connected with heat storage tank through connecting pipeline, and pulse valve is arranged on connecting pipeline. When cleaning dust, open pulse valve, and compressed air impacts and vibrates heat accumulator in the form of pulse, to achieve dust cleaning effect. However, the dust cleaning scheme has the following problems: 1) pulse time is short, generally in 100-200ms, and it is difficult to blow away all dust on heat accumulator by one pulse; 2) single compressed gas pulse dust cleaning needs multiple pulses or larger pulse valve for dust cleaning, which leads to large compressed gas consumption, which not only increases the cost of compressed gas, but also needs larger pressure tank for gas storage, so that the cost of pressure tank increases; 3) pressure tank occupies large installation space and has safety hazards; 4) jetting port is arranged in transition chamber, which affects manual cleaning of heat storage tank, and jetting pipe is easy to be blocked by dust.

[0004] In summary, there is an urgent need for an injection pulse jet dust cleaning structure to solve the problems of high cost, large space occupation and safety hazards in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an injection pulse jet dust cleaning structure, and the specific technical scheme is as follows:

[0006] An injection pulse jet dust cleaning structure, comprising a heat storage tank, an air inlet pipeline and an injection pulse assembly; the heat storage tank is communicated with the air inlet pipeline; the air inlet pipeline is connected with an external air blower; a heat accumulator is contained in the heat storage tank; one end of the injection pulse assembly is an air inlet, which is arranged outside the air inlet pipeline and communicated with compressed gas, and the other end is a jet port, which is arranged in the air inlet pipeline and arranged in the same direction with air inlet flow; the injection pulse assembly further comprises a pulse valve arranged between the air inlet and the jet port.

[0007] Optionally, the injection pulse assembly further comprises an injection pipeline; one end of the injection pipeline is the air inlet, and the other end is the jet port; the pulse valve is arranged on the injection pipeline.

[0008] Optionally, the ejecting pulse assembly further comprises a gas storage tank for storing compressed gas, and is connected with the air inlet.

[0009] Optionally, the regenerative box further comprises a transition chamber and a porous grate plate; the transition chamber is arranged at one end of the regenerative box close to the air inlet pipe and is communicated with the air inlet pipe; the transition chamber is separated from the regenerative body by the porous grate plate.

[0010] Optionally, the ejecting pulse blowing and ash removal structure further comprises an air valve; the air inlet valve is arranged on the air inlet pipe.

[0011] Optionally, the ejecting pulse blowing and ash removal structure, after the air inlet valve is opened and the air blower blows in air, the pulse is opened again. In the air inlet state, the pulse is blown, the pulse blowing and the air inlet combined force blow the regenerative body, increase the airflow to take away the dust, and enhance the blowing effect.

[0012] The technical scheme of the utility model has at least the following beneficial effects:

[0013] (1) The ejecting pulse blowing and ash removal structure can solve the problem of high cost in the prior art by single compressed gas pulse ash removal. Specifically, when the regenerative body is cleaned, the ejecting pulse assembly uses compressed gas to impact the regenerative body in a pulse manner, so that the dust on the regenerative body is loosened by vibration, and the dust on the regenerative body is removed by the air continuously flowing into the air inlet pipe. Under the effect of air volume superposition, the blowing time is prolonged and the blowing air volume is large, so that the effect of completely removing the dust is achieved.

[0014] (2) The gas storage tank has the advantages of small space occupation and low cost. Specifically, the ejecting pulse assembly of the utility model does not need to work multiple times, but only needs to work intermittently several times, so that the high-efficiency ash removal effect of the regenerative body can be achieved by combining the air inlet pipe. It can be seen that a smaller gas storage tank can meet the gas supply demand of the ejecting pulse assembly. Therefore, the small gas storage tank has the advantages of small space occupation and low cost.

[0015] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings that form a part of the present application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0017] Figure 1 is a structural schematic diagram of an example ejecting pulse blowing ash removal structure (the black arrow direction in the figure represents the air flow direction);

[0018] wherein, 1, heat storage box, 2, air inlet pipeline, 3, ejecting pulse assembly, 3.1, ejecting pipeline, 3.2, gas storage tank, 3.3, pulse valve, 4, transition chamber, 5, perforated grate plate DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.

[0020] Embodiment:

[0021] Referring to Figure 1 , an ejecting pulse blowing ash removal structure comprises a heat storage box 1, an air inlet pipeline 2 and an ejecting pulse assembly 3. The heat storage box 1 is in communication with the air inlet pipeline 2. The air inlet pipeline 2 is connected with an external air blower. A heat storage body (not shown in the figure) is contained in the heat storage box 1. One end of the ejecting pulse assembly 3 is an air inlet, which is in communication with compressed gas (the compressed gas comprises compressed air or compressed nitrogen, and compressed air is selected in the embodiment), and the other end thereof is a gas injection port, which is arranged in the air inlet pipeline 2 and is arranged in the same direction as the air inlet pipeline 2. The ejecting pulse assembly 3 further comprises a pulse valve 3.3 arranged between the air inlet and the gas injection port. The ejecting pulse assembly 3 can impact the heat storage body in a pulse mode by using compressed gas, so that the dust on the heat storage body is loosened by vibration, and the dust on the heat storage body is removed by combining with the air continuously flowing into the air inlet pipeline 2. Subsequently, the dust is discharged into the furnace along with the air inlet, so that the ash removal effect is achieved.

[0022] The ejecting pulse assembly 3 further comprises an ejecting pipeline 3.1. One end of the ejecting pipeline 3.1 is the air inlet, and the other end thereof is the gas injection port. The pulse valve 3.3 is arranged on the ejecting pipeline 3.1.

[0023] The ejecting pulse assembly 3 further comprises a gas storage tank for storing compressed gas, and the gas storage tank is connected with the air inlet. The gas storage tank 3.2 is connected with an external compressed gas source, that is, the external compressed gas source is used to provide compressed gas for the gas storage tank 3.2.

[0024] The transition chamber 4 is arranged at one end of the heat storage tank 1 close to the air inlet pipe 2 and communicates with the air inlet pipe 2; the transition chamber 4 is separated from the heat storage bodies by the porous grate plate 5. By using the transition chamber 4 and the porous grate plate 5, uniform soot blowing of the heat storage bodies can be realized, and the soot blowing efficiency is improved.

[0025] The injection type pulse blowing soot blowing structure further comprises an air inlet valve (not shown in the figure); the air inlet valve is arranged on the air inlet pipe 2.

[0026] More preferably, after the air inlet valve is opened and the air blower blows in air, the pulse is opened, the pulse blowing and the air inlet combined blowing of the heat storage bodies are realized, the airflow carrying dust is increased, and the blowing effect is enhanced.

[0027] When the heat storage bodies are sooted, the operation principle is as follows:

[0028] The compressed gas of the injection type pulse assembly 3 impacts the heat storage bodies in a pulse mode, so that the dust on the heat storage bodies is vibrated and loosened, and the dust on the heat storage bodies is blown and removed by the air continuously flowing in the air inlet pipe 2; the combination of the transition chamber 4 and the porous grate plate 5 facilitates uniform soot blowing of the heat storage bodies, and the soot blowing efficiency is improved; then, the dust is discharged into the furnace with the air inlet, and the soot blowing effect is achieved. During the soot blowing process, the injection type pulse assembly 3 does not need to work in a pulse mode for multiple times, but only needs to work in a pulse mode for several times intermittently, so that the high-efficiency soot blowing effect of the heat storage bodies can be realized in combination with the air inlet pipe 2, and the soot blowing cost is greatly reduced.

[0029] The above only describes preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pulse jet cleaning structure, characterized in that, It includes a heat storage box (1), an air inlet duct (2), and an ejector pulse assembly (3); the heat storage box (1) is connected to the air inlet duct (2); the air inlet duct (2) is connected to an external blower; the heat storage box (1) contains a heat storage body; one end of the ejector pulse assembly (3) is an air inlet, located outside the air inlet duct (2) and connected to compressed gas, while the other end is an air jet, located inside the air inlet duct (2) and located in the same direction as the air inlet flow; the ejector pulse assembly (3) also includes a pulse valve (3.3) located between the air inlet and the air jet.

2. The ejector-type pulse jet cleaning structure according to claim 1, characterized in that, The ejector pulse assembly (3) further includes an ejector conduit (3.1); one end of the ejector conduit (3.1) is the air inlet, and the other end is the jet outlet; the pulse valve (3.3) is disposed on the ejector conduit (3.1).

3. The ejector-type pulse jet cleaning structure according to claim 1, characterized in that, The ejector pulse assembly (3) also includes a gas storage tank (3.2) for storing compressed gas and is connected to the air inlet.

4. The ejector-type pulse jet cleaning structure according to any one of claims 1-3, characterized in that, The heat storage box (1) also includes a transition chamber (4) and a perforated grate plate (5); the transition chamber (4) is located at one end of the heat storage box (1) near the air inlet pipe (2) and is connected to the air inlet pipe (2); the transition chamber (4) is separated from the heat storage body by the perforated grate plate (5).

5. The ejector-type pulse jet cleaning structure according to claim 4, characterized in that, It also includes an air inlet valve; the air inlet valve is installed on the air inlet duct (2).

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