Waste gas waste heat utilization and ultra-low emission synergistic device for roller kiln

Abstract

The utility model discloses a roller kiln waste gas waste heat utilization and ultra-low emission synergetic device, and particularly relates to the field of new energy lithium battery waste gas treatment, which comprises a waste gas direct-fired unit at least comprising a direct-fired furnace cavity and a burner; the input end of the waste heat boiler is communicated with the output end of the direct combustion furnace cavity; the input end of the SCR reactor is communicated with the flue gas output end of the waste heat boiler; and an induced draft fan is communicated in a pipeline, connected with the output end of the waste heat boiler, of the chimney in series. The waste heat recovery device can efficiently recover waste heat in waste gas to generate steam to be used for other production sections, the economic value is improved, and meanwhile, the advanced waste gas purification technology is combined, so that ultralow emission of various pollutants in the waste gas is achieved.

Description

TECHNICAL FIELD

[0001] The utility model discloses new energy lithium battery waste gas treatment field, concretely relates to a roller kiln waste gas waste heat utilization collaborative ultra-low emission device. BACKGROUND

[0002] The current new energy lithium battery industry sintering roller kiln production procedure produces the waste gas composition more complex, mainly by organic waste gas, nitrogen oxide and obvious stench, to these waste gas treatment commonly uses the method of spraying water washing to handle adsorption, but the treatment effect is not remarkable, and will produce a large amount of wastewater needing purification treatment, not only to the enterprise increased investment, and the environmental improvement effect is not obvious. UTILITY MODEL CONTENTS

[0003] The utility model discloses a roller kiln waste gas waste heat utilization collaborative ultra-low emission device for solving the above problems.

[0004] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A roller kiln waste gas waste heat utilization collaborative ultra-low emission device, comprising:

[0006] Waste gas direct combustion unit, which at least includes direct combustion furnace cavity and burner;

[0007] Waste heat boiler, the input end is communicated with the direct combustion furnace cavity output end;

[0008] SCR reactor, the input end is communicated with the waste heat boiler flue gas output end;

[0009] Chimney, the pipeline that is connected with the output end of waste heat boiler is communicated in series with induced draft fan.

[0010] As preferred, the waste gas direct combustion unit further includes oxygen supply pipeline communicated with the input end of direct combustion furnace cavity to collect the waste gas collection system for the flue gas of direct combustion furnace cavity.

[0011] As preferred, the direct combustion furnace cavity is composed of insulating brick masonry.

[0012] As preferred, at least four layers of catalyst layers are provided in the SCR reactor.

[0013] As preferred, the first layer of catalyst layer is arranged in matrix array by a plurality of V-shaped plate members, and the vertex of each V-shaped plate member of the next layer is located at the midpoint of the straight line distance of the adjacent two V-shaped plate members of the previous layer.

[0014] As preferred, the second layer and the third layer of catalyst layer include two groups of filter members arranged in linear array by a plurality of arc-shaped plate members and rhombus members arranged in linear array between the two groups of filter members.

[0015] The arc-shaped plate ports of the two groups of filter pieces are arranged adjacently, and the vertices of the rhombic pieces correspond to the midpoints of the straight-line distances between two adjacent arc-shaped plates.

[0016] Preferably, the fourth layer of the catalyst layer is composed of a plurality of matrix-arranged conical guides, the conical guides are composed of symmetrically arranged guides, and the adjacent surfaces of two guides of one of the conical guides are respectively provided with arc-shaped protrusions arranged equidistantly in an inclined direction.

[0017] The two ends of the conical guide are wide-mouthed and narrow-mouthed, the wide mouth faces the third layer of the catalyst layer, and each conical guide in the next layer is distributed between the adjacent two conical guides in the previous layer.

[0018] In the above technical solution, the roll kiln waste gas waste heat utilization and synergistic ultra-low emission device has the following beneficial effects: the high-temperature gas after incineration treatment is efficiently utilized to generate steam for production needs of other sections, and the exhaust gas temperature after waste heat utilization is subjected to SCR denitration treatment, realizing ultra-low emission of pollutants in the exhaust gas, not only treating organic waste gas and odor in the sintering roll kiln exhaust gas, but also improving energy utilization efficiency and significantly reducing environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 The flow structure schematic diagram of the embodiments of the present application is provided.

[0021] Figure 2 The structure schematic diagram of the first layer of catalyst layer provided by the embodiments of the present application is provided.

[0022] Figure 3 The structure schematic diagram of the second layer and the third layer of catalyst layer provided by the embodiments of the present application is provided.

[0023] Figure 4 The structure schematic diagram of the fourth layer of catalyst layer provided by the embodiments of the present application is provided.

[0024] Explanation of reference signs:

[0025] 1, waste gas direct combustion unit; 2, waste heat boiler; 3, SCR reactor; 4, induced draft fan; 5, chimney; 6, V-shaped plate; 7, arc-shaped plate; 71, rhombic piece; 8, guide; 81, arc-shaped protrusion. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0027] As Figures 1-4 shown, a roller kiln waste heat utilization collaborative ultra-low emission device, comprising:

[0028] The waste gas direct combustion unit 1 at least includes a direct combustion furnace cavity and a burner.

[0029] The waste heat boiler 2 is communicated with the output end of the direct combustion furnace cavity.

[0030] The SCR reactor 3 is communicated with the flue gas output end of the waste heat boiler 2.

[0031] The chimney 5 is connected with the output end of the waste heat boiler 2.

[0032] Among them, the waste gas direct combustion unit 1 in the above embodiment further includes an oxygen supply pipeline communicated with the input end of the direct combustion furnace cavity to collect the waste gas collection system for discharging flue gas of the direct combustion furnace cavity. The oxygen supply pipeline is used to provide combustible gas in the direct combustion furnace cavity, so as to ensure that the internal combustion is fully burned. The waste gas collection system is actually a pipeline for discharging smoke after combustion, which is communicated with the input end of the waste heat boiler 2.

[0033] The burner in the above embodiment is actually an igniter.

[0034] In the above technology, the waste gas direct combustion unit 1 uses waste gas to participate in combustion directly. Because organic waste gas and odor are both combustible and can provide high calorific value, they are fully decomposed into CO2 and water under high temperature conditions, and a large amount of heat energy is released. Organic waste gas and odor gas components are removed and treated in the waste gas direct combustion unit 1. The high-temperature waste gas after combustion is used for waste heat utilization through the rear-end waste heat boiler 2 to produce steam for production needs of other sections in the factory area. Because the flue gas contains nitrogen oxides, the waste gas after the waste heat boiler 2 passes through the SCR reactor 3 to remove nitrogen oxides. The clean gas after treatment is discharged through the chimney.

[0035] The direct combustion furnace cavity in the above embodiment is composed of insulating bricks.

[0036] As a further provided embodiment in the embodiment, the SCR reactor 3 is provided with at least four layers of catalyst layers, specifically:

[0037] The first layer of catalyst layer is arranged by a plurality of V-shaped plates 6 in a matrix array, and the vertex of each V-shaped plate of the next layer is located at the midpoint of the linear distance between the adjacent two V-shaped plates of the previous layer. The gas passing through will be delayed by the plurality of V-shaped plates 6 arranged in a matrix array, and the liquid condensed on the V-shaped plates 6 will also flow down and will not form water accumulation here.

[0038] The second layer and the third layer of catalyst layer include two groups of filtering pieces arranged by a plurality of arc-shaped plates 7 in a linear array and a rhombus piece 71 arranged in a linear array between the two groups of filtering pieces, and the ports of the arc-shaped plates 7 of the two groups of filtering pieces are arranged adjacent to each other, and the vertex of the rhombus piece 71 corresponds to the midpoint of the linear distance between the adjacent two arc-shaped plates 7. The gas passing through will be delayed by the plurality of arc-shaped plates 7 and the plurality of rhombus pieces 71, and the liquid condensed on the second layer and the third layer of catalyst layer will also flow down and will not form water accumulation here.

[0039] The fourth layer of catalyst layer is composed of a plurality of conical guide pieces arranged in a matrix, and the conical guide piece is composed of guide pieces 8 arranged symmetrically, and the adjacent faces of the two guide pieces 8 of a conical guide piece are respectively provided with arc-shaped protrusions 81 arranged equidistantly in an inclined direction, and the two ends of the conical guide piece are wide and narrow, and the wide end faces the third layer of catalyst layer, and each conical guide piece of the next layer is distributed between the adjacent two conical guide pieces of the previous layer. The gas passing through will be delayed by the plurality of conical guide pieces, and the liquid condensed on the fourth layer of catalyst layer will also flow down and will not form water accumulation here.

[0040] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above figures and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A roller kiln waste heat utilization and ultra-low emission device, characterized in that, The application relates to a waste gas direct combustion unit (1) comprising at least a direct combustion furnace cavity and a burner; a waste heat boiler (2) with an input end connected with the output end of the direct combustion furnace cavity; an SCR reactor (3) with an input end connected with the flue gas output end of the waste heat boiler (2); and a chimney (5) connected with the output end of the waste heat boiler (2) and in series with an induced draft fan (4) in the pipeline. The waste gas direct combustion unit (1) further comprises an oxygen supply pipeline connected with the input end of the direct combustion furnace cavity to collect a waste gas collection system for discharging flue gas of the direct combustion furnace cavity. The direct combustion furnace cavity is composed of heat preservation bricks. The SCR reactor (3) is provided with at least four layers of catalyst layers. The first layer of the catalyst layers is arranged in a matrix array by a plurality of V-shaped plate pieces (6), and the vertex of each V-shaped plate piece of the next layer is located at the midpoint of the straight line distance between the adjacent two V-shaped plate pieces of the previous layer.

2. A roller kiln exhaust gas waste heat utilization and ultra-low emission device according to claim 1, characterized in that, The second layer and the third layer of the catalyst layers comprise two groups of filtering pieces arranged in a linear array by a plurality of arc-shaped plates (7) and rhombic pieces (71) arranged in a linear array between the two groups of filtering pieces.

3. The roller kiln exhaust gas waste heat utilization and ultra-low emission device according to claim 1, characterized in that, The arc-shaped plates (7) of the two groups of filtering pieces are arranged adjacent to each other at the ports, and the vertex of the rhombic piece (71) corresponds to the midpoint of the straight line distance between the adjacent two arc-shaped plates (7).

4. The roller kiln exhaust gas waste heat utilization and ultra-low emission device according to claim 1, characterized in that, The fourth layer of the catalyst layers is composed of a plurality of conical guide pieces arranged in a matrix, the conical guide piece is composed of guide pieces (8) arranged symmetrically, and the adjacent surfaces of the two guide pieces (8) of the conical guide piece are respectively provided with arc-shaped protrusions (81) arranged equidistantly in the inclined direction.

5. The roller kiln exhaust gas waste heat utilization and ultra-low emission device according to claim 4, characterized in that, The two ends of the conical guide piece are wide-mouthed and narrow-mouthed, the wide mouth faces the third layer of the catalyst layers, and each conical guide piece of the next layer corresponds to the distribution between the adjacent two conical guide pieces of the previous layer.

6. A roller kiln exhaust gas waste heat utilization and ultra-low emission device according to claim 4, characterized in that, ​ ​ 7. A roller kiln exhaust gas waste heat utilization and ultra-low emission device according to claim 4, characterized in that, ​ ​

Images