Flue gas quench tower of side-blown converter

Abstract

The utility model discloses a side-blown converter flue gas quench tower, which comprises a quench tower body and a support frame for mounting the quench tower body, a water inlet pipe and a gas inlet pipe are arranged at the upper end of the quench tower body, a gas outlet pipe and a discharge box are arranged at the bottom end of the quench tower body, a drain pipe is arranged at the bottom end of the discharge box, and the side-blown converter flue gas quench tower further comprises a filter box, a gas inlet pipe and a gas outlet pipe, the slag filter is arranged at the bottom end of the quench tower body and is used for filtering slag; wherein a filter plate and a scraping assembly for scraping the filter plate are arranged in the filter box. The filter plate and the scraping assembly are arranged, the filter plate filters ash water generated by combination of ash and liquid, the two winding rollers rotate in opposite directions, when one winding roller winds a pull wire, the other winding roller unwinds the pull wire, and therefore the pull wire can be scraped by the scraping assembly. And the scraping plate scrapes ash at the upper end of the filter plate and resets, so that the ash is prevented from being accumulated on the filter plate, and the filter plate is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of quench towers, and particularly relates to a side-blown furnace flue gas quench tower. Background Art

[0002] The flue gas purification process is planned to adopt the flue gas purification process of "SNCR denitration + quench tower + dry acid removal + activated carbon injection + bag filter + cooling scrubber + neutralization scrubber + electrostatic demister + flue gas heater"; the high-temperature flue gas first enters the waste heat boiler, which adopts a two-pass membrane water wall boiler to generate saturated steam at 1.25 MPa and 190 °C with an evaporation capacity of 14 t / h; an SNCR system is set in the first pass of the boiler body to effectively reduce the NOX content in the system. SNCR adopts full-automatic control, and the amount of urea sprayed is controlled by the NOX concentration measured by the flue gas on-line monitoring equipment. The flue gas temperature drops from 1100 - 1150 °C to about 550 °C and enters the quench tower; the quench tower is supplied with water by 2 water pumps with frequency conversion regulation. The frequency conversion regulation can quickly and accurately adjust the water supply flow. Compressed air is used as the atomization medium. The water supply is atomized into water droplets smaller than 30 μm by the pressure atomizing nozzles in the tower and directly conducts mass transfer and heat transfer exchange with the flue gas. The heat of the flue gas is used to evaporate the sprayed water, so that the flue gas is quickly cooled to about 200 °C in the tower. The residence time of the flue gas in the quench tower is less than 1 s; the flue gas coming out of the quench tower enters the bag filter to remove dust.

[0003] In the prior art, when the quench tower is in use and processes the flue gas, ash and slag in the flue gas combine with the liquid to produce ash water, but there is still residual ash and slag in the ash water. When the ash water is discharged, the ash water needs to be further treated, and additional treatment steps are required to filter the ash water. Therefore, a quench tower capable of treating ash water is needed. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above deficiencies and provide a side-blown furnace flue gas quench tower.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A side-blown furnace flue gas quench tower includes a quench tower body and a support frame for installing the quench tower body. The upper end of the quench tower body is provided with a water inlet pipe and a gas inlet pipe. The bottom end of the quench tower body is provided with a gas outlet pipe and a discharge box. The bottom end of the discharge box is provided with a drain pipe. It further includes:

[0007] A filter box, which is arranged at the bottom end of the quench tower body and is used for filtering slag;

[0008] Wherein, a filter plate and a scraping component for scraping the filter plate are arranged in the filter box.

[0009] Preferably, a feed inlet communicating with the quench tower body is provided at the upper end of the filtration box, and a discharge outlet communicating with the quench tower body is provided at the lower end of the filtration box.

[0010] Preferably, the scraping assembly includes:

[0011] A scraping plate, slidably disposed above the filter plate;

[0012] Traction wires, provided in two and disposed on both sides of the moving direction of the scraping plate;

[0013] A wire winding roller, disposed in the filtration box and used for winding the traction wires;

[0014] A power member, disposed on the wire winding roller and used for driving the wire winding roller to rotate.

[0015] Preferably, the power member includes:

[0016] A gear, disposed at one end of the wire winding roller;

[0017] A transmission chain, sleeved on the gear at both ends and meshed with the gear.

[0018] Preferably, a guide rod is penetrated through the scraping plate, and the guide rod is slidably connected with the scraping plate.

[0019] Preferably, a discharge plate is provided on one side of the filtration box, and the discharge plate is rotatably disposed on the filtration box.

[0020] Preferably, a heating pipe is provided near the top end inside the filtration box.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] By providing a filter plate and a scraping assembly, the filter plate filters the ash water generated by the combination of ash slag and liquid. When two wire winding rollers rotate in opposite directions, when one wire winding roller winds the traction wire, the other wire winding roller unwinds the traction wire, so that the scraping plate scrapes the ash slag on the upper end of the filter plate and resets, preventing the ash slag from accumulating on the filter plate and avoiding blockage of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 The first structural schematic diagram of the filter box in the present utility model;

[0026] Figure 3 The second structural schematic diagram of the filter box in the present utility model;

[0027] Figure 4 The sectional view of the filter box in the present utility model.

[0028] In the figure: 1. Quenching tower body; 11. Water inlet pipe; 12. Gas inlet pipe; 13. Gas outlet pipe; 14. Drain pipe; 15. Filter box; 151. Feed inlet; 152. Filter plate; 153. Scraping plate; 154. Guide rod; 155. Towing wire; 156. Wire winding roller; 157. Gear; 158. Transmission chain; 159. Discharge plate; 16. Discharge box; 17. Discharge outlet; 18. Heating pipe; 2. Support frame. Specific embodiments

[0029] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1-4 , a side-blowing furnace flue gas quenching tower, comprising a quenching tower body 1 and a support frame 2 for installing the quenching tower body 1. The upper end of the quenching tower body 1 is provided with a water inlet pipe 11 and a gas inlet pipe 12, the bottom end of the quenching tower body 1 is provided with a gas outlet pipe 13 and a discharge box 16, the bottom end of the discharge box 16 is provided with a drain pipe 14, and further includes:

[0031] A filter box 15, which is arranged at the bottom end of the quenching tower body 1 and is used for filtering slag;

[0032] Wherein, a filter plate 152 and a scraping assembly for scraping the filter plate 152 are arranged in the filter box 15.

[0033] With such a design, the flue gas at about 550 °C enters the quenching tower body 1 from the gas inlet pipe 12, and the water liquid enters the quenching tower body 1 from the water inlet pipe 11. An atomizing nozzle is connected at the water inlet pipe 11. The water sprayed by the atomizing nozzle exchanges heat with the flue gas, so that the flue gas is cooled to about 200 °C; the filter plate 152 filters the ash water generated by the combination of ash and liquid, and the scraping assembly scrapes and collects the ash on the filter plate 152.

[0034] In one embodiment, a feed inlet 151 communicating with the quench tower body 1 is provided at the upper end of the filter box 15, and a discharge outlet 17 communicating with the quench tower body 1 is provided at the lower end of the filter box 15.

[0035] In one embodiment, the scraping assembly includes:

[0036] A scraping plate 153 slidably disposed above the filter plate 152;

[0037] Two traction wires 155 disposed on both sides of the moving direction of the scraping plate 153;

[0038] A winding roller 156 disposed in the filter box 15 for winding the traction wire 155;

[0039] A power member disposed on the winding roller 156 for driving the winding roller 156 to rotate.

[0040] With such a design, the bottom end of the scraping plate 153 is in sliding contact with the top end of the filter plate 152; one end of the traction wire 155 is fixedly connected to the scraping plate 153, and the other end is fixedly connected to the winding roller 156; both the traction wire 155 and the winding roller 156 are provided in two and are respectively disposed on both sides of the scraping plate 153.

[0041] In one embodiment, the power member includes:

[0042] A gear 157 disposed at one end of the winding roller 156;

[0043] A transmission chain 158 sleeved on the gear 157 at both ends and meshed with the gear 157.

[0044] With such a design, the gear 157 is fixedly connected to the winding roller 156; one of the winding rollers 156 is fixedly connected to the power mechanism, and the power mechanism is an electric motor; the two winding rollers 156 rotate in opposite directions. When one winding roller 156 winds the traction wire 155, the other winding roller 156 pays out the traction wire 155, so that the scraping plate 153 scrapes the ash residue at the upper end of the filter plate 152 and resets, preventing the ash residue from accumulating on the filter plate 152 and avoiding blockage of the filter plate 152.

[0045] In one embodiment, a guide rod 154 is passed through the scraping plate 153, and the guide rod 154 is slidably connected to the scraping plate 153.

[0046] With such a design, the guide rod 154 enables the scraping plate 153 to slide stably.

[0047] In one embodiment, a discharge plate 159 is provided on one side of the filter box 15, and the discharge plate 159 is rotatably disposed on the filter box 15.

[0048] With such a design, the scraping plate 153 scrapes the ash residue at the upper end of the filter plate 152 to a position near the discharge plate 159, and the discharge is carried out when the discharge plate 159 is opened. A sealing strip is provided at the edge where the discharge plate 159 contacts the filter box 15, so that the sealing performance is good when the discharge plate 159 is in the closed state.

[0049] In one embodiment, a heating pipe 18 is provided near the top in the filter box 15.

[0050] With such a design, the heating pipe 18 is fixedly connected to the top in the filter box 15 to prevent the settled ash residue from condensing.

[0051] Working principle: During use, the flue gas at about 550 °C enters the quench tower body 1 from the inlet pipe 12, and the water liquid enters the quench tower body 1 from the inlet pipe 11. An atomizing nozzle is connected to the inlet pipe 11. The water sprayed by the atomizing nozzle exchanges heat with the flue gas, so that the temperature of the flue gas is reduced to about 200 °C; the filter plate 152 filters the ash water generated by the combination of the ash residue and the liquid, and the scraping assembly scrapes and collects the ash residue on the filter plate 152.

[0052] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0053] In addition, if the description of "first", "second", etc. is involved in the embodiments of the present utility model, the description of "first", "second", etc. is only for descriptive purposes and cannot be construed as indicating or implying its relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, "a plurality of" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model.

Claims

1. A side-blown furnace flue gas quenching tower, characterized in that: The invention comprises a quenching tower body (1) and a support frame (2) for mounting the quenching tower body (1), wherein the upper end of the quenching tower body (1) is provided with a water inlet pipe (11) and an air inlet pipe (12), the lower end of the quenching tower body (1) is provided with an air outlet pipe (13) and a discharge box (16), the lower end of the discharge box (16) is provided with a drainage pipe (14), and further comprises: A filter box (15) is arranged at the bottom end of the quenching tower body (1) and is used to filter slag; Wherein, a filter plate (152) and a scraping assembly for scraping the filter plate (152) are provided in the filter box (15).

2. The side-blown furnace flue gas quenching tower according to claim 1, characterized in that: The upper end of the filter box (15) is provided with a feed port (151) communicating with the quenching tower body (1), and the lower end of the filter box (15) is provided with a discharge port (17) communicating with the quenching tower body (1).

3. The side-blown furnace flue gas quenching tower according to claim 2, characterized in that: The scraper assembly comprises: A scraper plate (153) is slidably disposed above the filter plate (152); There are two traction lines (155) arranged on both sides of the moving direction of the scraper plate (153); A winding roller (156), disposed in the filter box (15) and used for winding the traction wire (155); A power member is disposed on the winding roller (156) and is used to drive the winding roller (156) to rotate.

4. The side-blown furnace flue gas quenching tower according to claim 3, characterized in that: The power member comprises: A gear (157) is disposed at one end of the winding roller (156); The transmission chain (158) has two ends which are sleeved on the gear (157) and meshedly connected with the gear (157).

5. The side-blown furnace flue gas quenching tower according to claim 4, characterized in that: A guide rod (154) is provided on the scraper plate (153), and the guide rod (154) is slidably connected to the scraper plate (153).

6. The side-blown furnace flue gas quenching tower according to claim 5, characterized in that: A discharge plate (159) is provided on one side of the filter box (15), and the discharge plate (159) is rotatably disposed on the filter box (15).

7. The side-blown furnace flue gas quenching tower according to claim 6, characterized in that: A heating pipe (18) is provided near the top end of the filter box (15).

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