Large downstream pot-type calcining furnace flashboard

Abstract

The utility model relates to a flashboard of a large downstream pot-type calcining furnace. Comprising a flashboard body, and a hollow cavity is formed in the flashboard body; a plurality of partition plates are vertically arranged in the cavity, and the adjacent partition plates are arranged in an up-and-down staggered mode; the other end of the upper side of the flashboard body is connected with a water outlet pipe; the water inlet pipe is connected with a water pump. Circulating water of the water-cooled flashboard flows reversely, a pressure release valve is arranged to prevent gasification, two sets of water pumps are switched, uninterrupted water supply is achieved, and a metal shell replaces a refractory material flashboard body.

Description

Technical Field

[0001] The utility model relates to the field of calcining furnaces, and specifically relates to a gate plate of a large-scale down-flow pot-type calcining furnace. Background Art

[0002] The existing gate plates of large-scale down-flow pot-type calcining furnaces are high-temperature gate plates made of steel plates and lightweight fiber castables. After being used for a period of time, they all show phenomena such as fracture or melting and falling into the flue, resulting in a smaller cross-sectional area of the flue of the calcining furnace. Personnel cannot enter the flue to take the waste refractory materials during the production process, and there are also high safety problems when taking them from the outside, seriously affecting the subsequent production, negative pressure, temperature, quality and output of calcined coke of the calcining furnace, increasing the operation cost and labor intensity of workers. After the cross-sectional area of the flue inlet becomes smaller, the negative pressure decreases, and coke is likely to form on the furnace wall, reducing the service life of the calcining furnace. The operating frequency of the main induced draft fan is forced to increase, and the power consumption increases. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problem of the short service life of the existing gate plates.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a gate plate of a large-scale down-flow pot-type calcining furnace, including a gate plate body, and a hollow cavity is arranged inside the gate plate body;

[0005] A plurality of partition plates are arranged in the cavity, the partition plates are arranged vertically, and adjacent partition plates are arranged up and down in a staggered manner;

[0006] One end of the upper side of the gate plate body is connected to a water inlet pipe, and the other end is connected to a water outlet pipe;

[0007] The water inlet pipe is connected to a water pump.

[0008] Further, the water outlet pipe is connected to a circulating water tank.

[0009] Further, a pressure relief valve is arranged on one side of the gate plate body close to the water inlet pipe.

[0010] Further, a temperature and pressure gauge are arranged on the gate plate body.

[0011] Further, the number of water pumps is 2.

[0012] Further, a lifting lug is arranged at the upper end of the gate plate body.

[0013] Further, the water inlet pipe is inserted into the gate plate body, and the distance from the bottom of the cavity is 15 - 25 cm.

[0014] Further, the number of partition plates is 3, and the lower end of the middle partition plate is connected to the bottom of the cavity.

[0015] Furthermore, the diameter of the water outlet pipe is larger than that of the water inlet pipe.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: the circulating water of the water-cooled gate plate flows reversely, equipped with a pressure relief valve to prevent gasification, dual sets of water pumps are switched to achieve uninterrupted water supply, and a metal shell replaces the refractory gate body. The new water-cooled gate has been in use for three and a half years without damage, and when lifted for inspection, the surface is in good condition and there is no scaling on the inner wall. It has strong reproducibility, simple manufacturing and installation, and high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a gate plate of a large-scale downflow pot-type calciner;

[0018] Among them: gate plate body 1, cavity 2, partition plate 3, water inlet pipe 4, water outlet pipe 5, circulating water tank 6, pressure relief valve 7, water pump 8, lifting lug 9, temperature and pressure gauge 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of 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.

[0020] As Figure 1 shown, this embodiment provides a gate plate for a large-scale downflow pot-type calciner, including a gate plate body 1, which is designed, manufactured and welded according to the flue size, welded with steel plates, and a hollow cavity 2 is provided inside the gate plate body 1;

[0021] A plurality of partition plates 3 are provided in the cavity 2, the partition plates 3 are vertically welded, and the adjacent partition plates 3 are arranged up and down in a staggered manner, so that the water flow inside the cavity 2 is in an M-shaped trend;

[0022] One end of the upper side of the gate plate body 1 is connected to the water inlet pipe 4, and the other end is connected to the water outlet pipe 5, so that the circulating water flows reversely in the cavity 2, and the water inlet pipe 4 and the water outlet pipe 5 adopt rubber pipelines and stainless steel pipelines;

[0023] The water inlet pipe 4 is connected to the water pump 8, and the water pump 8 adopts the model 25SGR3-20, with a flow rate of 3m 3 / h single-phase pipeline pump.

[0024] In another embodiment of the present application, the water outlet pipe 5 is connected to the circulating water tank 6, and the return water directly flows into the water tank cooling water tank and is recycled through the water pump 8 after cooling.

[0025] In another embodiment of the present application, a pressure relief valve 7 is provided on one side of the top of the gate body 1 near the water inlet pipe 4 to solve the problem that the steam generated by high water temperature cannot be discharged, which affects the circulation volume.

[0026] In another embodiment of the present application, a temperature and pressure gauge 10 is provided outside the gate body 1 to monitor the pressure and temperature inside the gate, playing a safety role.

[0027] In another embodiment of the present application, the water supply system uses two pumps 8 in standby. A check valve is installed at the outlet of the pump 8, and the water pressure is monitored by the test probe of the temperature and pressure gauge 10. When the water pressure is low, the pump operation is switched. When the pressure of the inlet main pipe is monitored to be low, an alarm is issued to remind the operating personnel to conduct on-site inspections.

[0028] In another embodiment of the present application, a lifting lug 9 is welded to the upper end of the gate body 1 to facilitate lifting the gate.

[0029] In another embodiment of the present application, the number of partitions 3 is three. The lower end of the middle partition 3 is connected to the bottom of the cavity 2, and the water inlet pipe 4 is inserted into the gate body 1, 15 - 25 cm away from the bottom of the cavity 2.

[0030] In another embodiment of the present application, the diameter of the water outlet pipe 5 is larger than that of the water inlet pipe 4. The advantage of this is to prevent pressure buildup inside the gate and is beneficial to the outflow of water.

[0031] Economic benefits:

[0032] The unit price of the original flue gate used was 18,000 yuan (verified by the project department), and the unit price of the current water-cooled flue gate is 8,000 yuan (including 5,000 yuan per ton of steel and 3,000 yuan of manufacturing cost);

[0033] The service life of the original flue gate was one month, and the service life of the current water-cooled gate is expected to be two years;

[0034] There are a total of four calcining furnaces, and the production years of the calcining furnaces are about eight years;

[0035] The unit price of the original flue gate was 18,000 * 4 furnaces * 12 months, with an annual cost of 864,000 yuan;

[0036] The current unit price of the water-cooled gate is 8000 yuan * 4 furnaces * 24 months, with an annual cost of 16000 yuan. Each gate is equipped with two 370W single-phase pipeline pumps as one standby and one in use. The unit price of the water pump is 300 yuan per unit, and the total cost of 8 pumps is 2400 yuan per year. The service life is one year. Calculated at 0.5 yuan per degree of electricity, the electricity cost is 4.44 yuan per day, 1620 yuan per year. The electricity cost of 4 water-cooled gates is 6480 yuan per year. The water supply uses power to supply the circulating water in the cooling water jacket, and the return water flowing out of the gate directly returns to the circulating water pipeline (the water consumption can be ignored). It is estimated that the company can save a total cost of 839120 yuan per year, with significant economic benefits.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large downstream pot calcining furnace gate, characterized in that: It comprises a gate body (1), wherein a hollow cavity (2) is provided in the gate body (1); A plurality of partitions (3) are arranged in the cavity (2), the partitions (3) are arranged vertically, and adjacent partitions (3) are arranged in an up-and-down staggered manner; One end of the upper side of the gate body (1) is connected to the water inlet pipe (4), and the other end is connected to the water outlet pipe (5); The water inlet pipe (4) is connected to a water pump (8).

2. The large downstream pot calcining furnace gate according to claim 1 is characterized in that: The water outlet pipe (5) is connected to the circulating water tank (6).

3. The large downstream pot calcining furnace gate according to claim 2 is characterized in that: A pressure relief valve (7) is provided on the side of the gate body (1) close to the water inlet pipe (4).

4. The large downstream pot calcining furnace gate according to claim 1 is characterized in that: The gate body (1) is provided with a temperature and pressure gauge (10).

5. The large downstream pot calcining furnace gate according to claim 1 is characterized by: The number of the water pumps (8) is 2.

6. The large downstream pot calcining furnace gate according to claim 1 is characterized by: The upper end of the gate body (1) is provided with a lifting lug (9).

7. The large downstream pot calcining furnace gate according to claim 1 is characterized by: The water inlet pipe (4) is inserted into the gate body (1) and is 15-25 cm away from the bottom of the cavity (2).

8. The large downstream pot calcining furnace gate according to claim 1 is characterized by: There are three partitions (3), and the lower end of the middle partition (3) is connected to the bottom of the cavity (2).

9. The large downstream pot calcining furnace gate according to claim 1, characterized in that: The water outlet pipe (5) has a larger diameter than the water inlet pipe (4).

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