Waste gas treatment device for die head of granulator

Abstract

The utility model provides a granulator die head waste gas treatment device which comprises a granulator die head draught hood, a die head fan and a die head demister, the die head fan is connected with the granulator die head draught hood and is used for extracting tail gas generated by a granulator die head; the die head demister is connected with the die head fan and used for absorbing tail gas generated by the die head of the granulator and extracted by the die head fan and filtering the tail gas, and the filtered tail gas is discharged to a power plant to serve as dilution air. The device can effectively remove oil drops in waste gas of the die head, the filtered waste gas is discharged to a power plant in a sealed manner to serve as dilution air, and no atmosphere is discharged and no sewage is generated. Compared with a waste gas washing tower system used in the industry at present, the system is more environment-friendly and energy-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of die head waste gas treatment, and in particular to a pelletizer die head waste gas treatment device. Background Art

[0002] The current industry mainly pumps the tail gas generated by the pelletizer die head to the scrubber through the die head fan for washing and then discharged to the atmosphere. The vacuum tail gas is directly discharged to the scrubber for washing and then discharged to the atmosphere. The scrubber uses a circulating pump to circulate water to wash the exhaust gas, and the sewage is discharged to the sewage treatment plant for treatment. The use of the tail gas scrubber and circulating pump not only increases the equipment investment cost, but also has the disadvantages of wasting electricity, consuming circulating water, and generating sewage. Utility Model Content

[0003] Based on the technical problems raised above, a pelletizer die head exhaust gas treatment device is provided. The utility model can effectively remove oil droplets in the pelletizer die head exhaust gas. The filtered exhaust gas is discharged to the power plant in a sealed manner as dilution air, without atmospheric emission and sewage generation.

[0004] The technical means adopted by this utility model are as follows:

[0005] A pelletizer die head exhaust gas treatment device includes a pelletizer die head exhaust hood, a die head fan and a die head demister, wherein:

[0006] The die head blower is connected to the pelletizer die head exhaust hood and is used to extract the tail gas generated by the pelletizer die head;

[0007] The die head demister is connected to the die head blower and is used to absorb the tail gas generated by the pelletizer die head extracted by the die head blower and filter the tail gas. The filtered tail gas is discharged to the power plant as dilution air.

[0008] Furthermore, the die head blower includes a centrifugal blower, a blower inlet valve, a blower outlet valve, and an outlet pressure gauge, wherein:

[0009] The centrifugal fan is connected to the pelletizer die head exhaust hood through the exhaust hood to the fan connecting pipe and the fan inlet valve. After the centrifugal fan is started, negative pressure is formed at the pelletizer die head exhaust hood to extract the exhaust gas generated by the pelletizer die head.

[0010] Furthermore, the die head blower also includes an outlet pressure gauge, which is arranged on the connecting pipe between the centrifugal blower and the blower outlet valve and is used to detect the pressure at the blower outlet.

[0011] Furthermore, the die head demister includes a demister body, a demister filter cylinder and a filter element, a demister inlet valve, a demister inlet, a demister outlet, and a demister outlet valve, wherein:

[0012] The demister body is connected to the die head tail gas demister connecting pipe through the fan, and the demister inlet valve is connected to the fan outlet valve. The tail gas extracted by the die head fan enters the demister filter cylinder and filter element through the demister inlet. After being filtered by the special filter element, the oil droplets in the tail gas are filtered and collected and discharged at the bottom of the demister. The filtered tail gas is discharged to the power plant as dilution air through the demister outlet valve connected to the demister outlet and the demister to power plant connecting pipe.

[0013] Furthermore, a demister jacket is provided on the outer side of the demister body, and the upper end and lower end of one side of the demister jacket are respectively connected to the jacket hot water inlet and the jacket hot water outlet, wherein the jacket hot water inlet is used for hot water inlet of the demister jacket; the jacket hot water outlet is used for hot water return of the demister jacket.

[0014] Furthermore, the bottom end of the demister body is also connected to a demister drain port for discharging waste oil.

[0015] Furthermore, a steam blowing device is also provided in the demister body for blowing away oil droplets from the filter element in the die head demister.

[0016] Furthermore, the demister body is also connected to a thermometer and a remote level gauge, wherein the thermometer is used to display the temperature inside the die demister, and the remote level gauge is used to display the liquid level of the waste oil in the die demister.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. The pelletizer die head exhaust gas treatment device provided by the utility model replaces two washing tower systems with two demisters to meet the exhaust gas treatment needs, save investment, save electricity and production water consumption, and no sewage is generated.

[0019] 2. Comparing this unit with the same production capacity, competitors consume 1.2 t / h of circulating water, 30 kW / h of electricity, and generate 1.2 t / h of wastewater. This unit, however, saves 1.2 t / h of circulating water, 15 kW / h of electricity (two 7.5 kW circulating pumps), and reduces wastewater discharge by 1.2 t / h. Based on an annual operating time of 8,000 hours, this results in a total electricity saving of 120,000 kWh and 9,600 tons of circulating cooling water. This 9,600-ton reduction in wastewater discharge translates to an annual production cost savings of approximately 200,000 yuan.

[0020] Based on the above reasons, the utility model can be widely promoted in the fields of waste gas treatment and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a schematic diagram of the structure of the device of the utility model.

[0023] In the figure: 1. Pelletizer die head exhaust hood; 2. Connection pipe from exhaust hood to fan; 3. Fan inlet valve; 4. Centrifugal fan; 5. Fan outlet pressure gauge; 6. Fan outlet valve; 7. Connection pipe from fan to die head exhaust demister; 8. demister inlet valve; 9. demister inlet; 10. demister outlet; 11. demister outlet valve; 12. Connection pipe from demister to power plant; 13. demister body; 14. demister jacket; 15. demister filter cylinder and filter element; 16. demister drain port; 17. Steam purge device; 18. Jacket hot water inlet; 19. Jacket hot water outlet; 20. On-site thermometer; 21. Remote level gauge. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0028] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0031] like Figure 1 As shown, the utility model provides a pelletizer die head exhaust gas treatment device, including a pelletizer die head exhaust hood 1, and also includes: a die head fan and a die head demister, wherein:

[0032] The die head blower is connected to the pelletizer die head exhaust hood 1 and is used to extract the tail gas generated by the pelletizer die head;

[0033] The die head demister is connected to the die head blower and is used to absorb the tail gas generated by the pelletizer die head extracted by the die head blower and filter the tail gas. The filtered tail gas is discharged to the power plant as dilution air.

[0034] In specific implementation, as a preferred embodiment of the present utility model, the die head blower includes a centrifugal blower 4, a blower inlet valve 3, a blower outlet valve 6, and an outlet pressure gauge 5, wherein:

[0035] The centrifugal fan 4 is connected to the pelletizer die head exhaust hood 1 through the exhaust hood to the fan connecting pipe 2 and the fan inlet valve 3. After the centrifugal fan 4 is started, a negative pressure is formed at the pelletizer die head exhaust hood 1 to extract the exhaust gas generated by the pelletizer die head.

[0036] In specific implementation, as a preferred embodiment of the present invention, the die head blower further includes an outlet pressure gauge 5, which is arranged on the connecting pipe between the centrifugal blower 4 and the blower outlet valve 6 to detect the pressure at the blower outlet.

[0037] In specific implementation, as a preferred embodiment of the present invention, the die head demister includes a demister body 13, a demister filter cylinder and a filter element 15, a demister inlet valve 8, a demister inlet 9, a demister outlet 10, and a demister outlet valve 11, wherein:

[0038] The demister body 13 is connected to the die head tail gas demister connecting pipe 7 through the fan, and the demister inlet valve 8 is connected to the fan outlet valve 6. The tail gas extracted by the die head fan enters the demister filter cylinder and filter element 15 through the demister inlet 9. After being filtered by the special filter element, the oil droplets in the tail gas are filtered to the bottom of the demister for collection and discharge. The filtered tail gas is discharged to the power plant as dilution air through the demister outlet valve 11 connected to the demister outlet 10 and the demister to power plant connecting pipe 12.

[0039] During specific implementation, as a preferred embodiment of the present invention, a demister jacket 14 is provided on the outer side of the demister body 13, and the upper and lower ends of one side of the demister jacket 14 are respectively connected to the jacket hot water inlet 18 and the jacket hot water outlet 19, wherein the jacket hot water inlet 18 is used for hot water inlet of the demister jacket 14; the jacket hot water outlet 19 is used for hot water return of the demister jacket 14.

[0040] During specific implementation, as a preferred embodiment of the present invention, the bottom end of the demister body 13 is further connected to a demister drain port 16 for discharging waste oil.

[0041] In specific implementation, as a preferred embodiment of the present invention, a steam blowing device 17 is further provided in the demister body 13 for blowing away oil droplets from the filter element in the die head demister.

[0042] In specific implementation, as a preferred embodiment of the present invention, the demister body 13 is also connected to a thermometer 20 and a remote liquid level gauge 21, wherein the thermometer 20 is used to display the temperature inside the die demister, and the remote liquid level gauge 21 is used to display the liquid level of the waste oil in the die demister.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pelletizer die head exhaust gas treatment device, comprising a pelletizer die head exhaust hood (1), characterized in that: Also includes: Die head blower and die head mist eliminator, including: The die head blower is connected to the pelletizer die head exhaust hood (1) and is used to extract the tail gas generated by the pelletizer die head; The die head demister is connected to the die head blower and is used to absorb the tail gas generated by the pelletizer die head extracted by the die head blower and filter the tail gas. The filtered tail gas is discharged to the power plant as dilution air.

2. The pelletizer die head exhaust gas treatment device according to claim 1, characterized in that: The die head blower comprises a centrifugal blower (4), a blower inlet valve (3), a blower outlet valve (6), and an outlet pressure gauge (5), wherein: The centrifugal fan (4) is connected to the pelletizer die head exhaust hood (1) through the exhaust hood to the fan connecting pipe (2) and the fan inlet valve (3). After the centrifugal fan (4) is started, a negative pressure is formed at the pelletizer die head exhaust hood (1) to extract the tail gas generated by the pelletizer die head.

3. The pelletizer die head exhaust gas treatment device according to claim 1, characterized in that: The die head blower further comprises an outlet pressure gauge (5), which is arranged on the connecting pipe between the centrifugal blower (4) and the blower outlet valve (6) and is used to detect the pressure at the blower outlet.

4. The pelletizer die head exhaust gas treatment device according to claim 1, characterized in that: The die head demister comprises a demister body (13), a demister filter cylinder and a filter element (15), a demister inlet valve (8), a demister inlet (9), a demister outlet (10), and a demister outlet valve (11), wherein: The demister body (13) is connected to the fan-to-die tail gas demister connecting pipe (7) and the demister inlet valve (8) through the fan outlet valve (6). The tail gas extracted by the die-head fan enters the demister filter cylinder and filter element (15) through the demister inlet (9). After being filtered by the special filter element, the oil droplets in the tail gas are filtered and collected and discharged at the bottom of the demister. The filtered tail gas is discharged to the power plant as dilution air through the demister outlet valve (11) connected to the demister outlet (10) and the demister-to-power plant connecting pipe (12).

5. The pelletizer die head exhaust gas treatment device according to claim 4, characterized in that: A demister jacket (14) is provided on the outer side of the demister body (13), and the upper end and the lower end of one side of the demister jacket (14) are respectively connected to a jacket hot water inlet (18) and a jacket hot water outlet (19), wherein the jacket hot water inlet (18) is used for hot water inlet of the demister jacket (14); and the jacket hot water outlet (19) is used for hot water return of the demister jacket (14).

6. The pelletizer die head exhaust gas treatment device according to claim 5, characterized in that: The bottom end of the demister body (13) is also connected to a demister drain port (16) for discharging waste oil.

7. The pelletizer die head exhaust gas treatment device according to claim 6, characterized in that: A steam blowing device (17) is also provided in the demister body (13) for blowing away oil droplets from the filter element in the die head demister.

8. The pelletizer die head exhaust gas treatment device according to claim 7, characterized in that: The demister body (13) is also connected to a thermometer (20) and a remote level gauge (21), wherein the thermometer (20) is used to display the temperature inside the die demister, and the remote level gauge (21) is used to display the liquid level of the waste oil in the die demister.

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