Self-cooled steam heated rotary dry ammonium furnace

Abstract

The utility model discloses a kind of self-cooled steam heating rotary dry ammonium furnace, comprising: rotary dry ammonium furnace body;Finished product material output pipe, it is set in rotary dry ammonium furnace body, by rotary dry ammonium furnace body furnace tail to rotary dry ammonium furnace body furnace head, finished product material is delivered to finished product unloading device;Return material device, it is set at the furnace tail of rotary dry ammonium furnace body;And premixer, after premixing return material and input material that return material device delivers, it is transferred to the furnace head of rotary dry ammonium furnace body.The utility model can convey return material and finished product respectively through different passageways;In return material process, guarantee higher return material temperature and return material ratio;In finished product delivery process, realize finished product cooling, both reduce system energy consumption, reduce equipment investment, while carrying out heat input to furnace head low-temperature section, more conducive to improving furnace head section temperature.

Description

Technical Field

[0001] This utility model belongs to the field of steam-heated rotary ammonium drying technology, and particularly relates to a self-cooling steam-heated rotary ammonium drying furnace. Background Technology

[0002] With the development of the soda ash industry, alkali plants are becoming larger and larger, competition is becoming more and more intense, and environmental protection requirements are becoming more and more stringent. Large-scale steam rotary ammonium chloride dryer has the characteristics of high single-unit capacity, significantly reduced energy consumption, compliance with environmental emission standards, long operating cycle, and low failure rate. It will gradually replace the traditional fluidized bed ammonium chloride dryer, solving the problems of high energy consumption and short operating cycle of the traditional fluidized bed ammonium chloride dryer.

[0003] The existing steam rotary dry ammonium furnace adjusts the material temperature and humidity by returning the material output from the furnace tail to the furnace head for premixing. It has the following disadvantages: (1) The output volume is prone to large periodic fluctuations: When the temperature of the wet ammonium and dry ammonium mixture at the furnace head is low, the adhesion is strong and the fluidity is poor. It accumulates in the furnace head section (feeding section). When it absorbs enough heat (temperature rises), it suddenly disperses and the fluidity is suddenly improved. The material surge phenomenon occurs in the furnace, and the output volume of the drying furnace fluctuates periodically. (2) External cooling equipment is required: In order to control the temperature of the mixture in the furnace head section, it is necessary to increase the temperature and flow rate of the moisture-carrying gas and the temperature of the returned material. Since the returned material and the finished product are transported through the same channel and outlet, the temperature of the finished product rises. Because the temperature is too high, it is easy to absorb moisture and clump together and damage the packaging bag during packaging. Cooling equipment needs to be added. The cooling process will increase the system energy consumption and equipment investment. Utility Model Content

[0004] In order to overcome the shortcomings of existing technologies, the purpose of this utility model is to propose a self-cooling steam-heated rotary dry ammonium furnace, which conveys the return material and the finished product through different channels, cools the finished product during the conveying process, and simultaneously inputs heat into the low-temperature section of the furnace head.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a self-cooled steam-heated rotary dry ammonium furnace, comprising:

[0006] Rotary dry ammonium furnace body;

[0007] The finished product output pipe is installed on the rotary dry ammonium furnace body, and runs from the tail of the rotary dry ammonium furnace body to the head of the rotary dry ammonium furnace body, conveying the finished product to the finished product unloading device;

[0008] The return material device is located at the tail of the rotary dry ammonium furnace.

[0009] The premixer premixes the return material from the return device with the input material and then transfers it to the furnace head of the rotary dry ammonium furnace.

[0010] Furthermore, the finished material conveying pipe adopts a spiral pipe, which extends the path and improves the cooling effect.

[0011] Furthermore, a regulating valve is installed on the finished product material conveying pipe to regulate the conveying volume of the finished product material.

[0012] Furthermore, the finished product unloading device includes a finished product discharge hood and a finished product airlock unloader. The finished product discharge hood is installed outside the furnace head of the rotary dry ammonium furnace, and the finished product airlock unloader is installed on the finished product discharge hood.

[0013] Furthermore, the return material device includes a return material discharge hood, a return material airlock unloader, a scraper conveyor, and a bucket elevator. The return material discharge hood is installed at the tail of the rotary dry ammonium furnace body. The return material airlock unloader is installed on the return material discharge hood. The discharge end of the return material airlock unloader is equipped with a scraper conveyor. The discharge end of the scraper conveyor is equipped with a bucket elevator. The discharge end of the bucket elevator leads to the premixer.

[0014] Furthermore, the premixer delivers the material to the burner head of the rotary dry ammonium furnace via a feeding screw, allowing the premixed material to smoothly enter the furnace body.

[0015] Furthermore, an air inlet hood is provided outside the feeding screw, and a furnace gas outlet is provided on the return material discharge hood at the tail of the rotary dry ammonium furnace. Moisture-laden gas is introduced through the air inlet hood to mix with the furnace gas and is quickly discharged from the furnace gas outlet above the tail discharge hood.

[0016] Furthermore, a feed seal is provided on the feed end of the furnace head of the rotary dry ammonium furnace body.

[0017] Furthermore, the rotary dry ammonium furnace body is supported by a roller device.

[0018] Furthermore, the rotary dry ammonium furnace body is rotated via a transmission device.

[0019] The beneficial effects of adopting this technical solution are:

[0020] This invention allows the return material and finished product to be conveyed through different channels, ensuring a high return material temperature and return material ratio. After being fully premixed by an external premixer, the material enters the dry ammonium furnace, resulting in a higher temperature and lower moisture content in the furnace head section (feeding section), thus reducing the stickiness of the mixture.

[0021] This invention allows partially dried, high-temperature ammonium chloride to be transported from the furnace tail to the finished product discharge hood at the furnace head via a finished product output pipe wound around the furnace body. During the transport process, the temperature of the finished product gradually decreases through heat conduction, reaching the temperature required by the packaging machine. This eliminates the need for a cooling device before packaging, reducing system energy consumption and equipment investment. At the same time, heat is input into the furnace body, especially into the low-temperature section at the furnace head, which is more conducive to increasing the temperature of the furnace head section. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a self-cooled steam-heated rotary dry ammonium furnace according to the present invention;

[0023] Figure 2 This is a schematic diagram of the return material structure in an embodiment of this utility model;

[0024] Among them, 1 is the feeding screw, 2 is the air inlet hood, 3 is the feeding seal, 4 is the finished product discharge hood, 5 is the support roller device, 6 is the rotary dry ammonium furnace body, 7 is the finished product output pipe, 8 is the transmission device, 9 is the regulating valve, 10 is the return material discharge hood, 11 is the return material airlock unloader, 12 is the finished product airlock unloader, 13 is the premixer, 14 is the scraper conveyor, and 15 is the bucket elevator. Detailed Implementation

[0025] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described below with reference to the accompanying drawings.

[0026] In this embodiment, see Figure 1 As shown, a self-cooled steam-heated rotary dry ammonium furnace includes:

[0027] Rotary dry ammonium furnace body 6;

[0028] The finished product output pipe 7 is installed on the rotary dry ammonium furnace body 6, and is connected from the tail of the rotary dry ammonium furnace body 6 to the head of the rotary dry ammonium furnace body 6 to transport the finished product to the finished product unloading device.

[0029] The return material device is located at the tail of the rotary dry ammonium furnace body 6;

[0030] The premixer 13 premixes the return material conveyed by the return device with the input material and then transfers it to the furnace head of the rotary dry ammonium furnace body 6.

[0031] As an optimization of the above embodiment, the finished product material conveying pipe is a spiral pipe.

[0032] A regulating valve 9 is installed on the finished product material conveying pipe.

[0033] The finished product unloading device includes a finished product discharge hood 4 and a finished product airlock unloader 12. The finished product discharge hood 4 is installed outside the furnace head of the rotary dry ammonium furnace body 6, and the finished product airlock unloader 12 is installed on the finished product discharge hood 4.

[0034] As an optimization of the above embodiments, such as Figure 2 As shown, the return material device includes a return material discharge hood 10, a return material airlock unloader 11, a scraper conveyor 14, and a bucket elevator 15. The return material discharge hood 10 is provided at the tail of the rotary dry ammonium furnace body 6. The return material airlock unloader 11 is installed on the return material discharge hood 10. The discharge end of the return material airlock unloader 11 is provided with a scraper conveyor 14. The discharge end of the scraper conveyor 14 is provided with a bucket elevator 15. The discharge end of the bucket elevator 15 leads to the premixer 13. The dotted line in the figure indicates the direction of return material transmission.

[0035] As an optimized solution of the above embodiment, the premixer 13 transmits the material to the burner head of the rotary dry ammonium furnace body 6 through the feeding screw 1.

[0036] As an optimized solution of the above embodiment, an air inlet hood 2 is provided outside the feeding screw 1, and a furnace gas outlet is provided on the return material discharge hood 10 at the tail of the rotary dry ammonium furnace body 6. Moisture-laden gas is introduced through the air inlet hood 2 to mix with the furnace gas and is quickly discharged from the furnace gas outlet above the tail discharge hood.

[0037] As an optimization of the above embodiment, a feed seal 3 is provided on the feed end of the furnace head of the rotary dry ammonium furnace body 6.

[0038] As an optimized solution of the above embodiment, the rotary dry ammonium furnace body 6 is supported by a roller device 5.

[0039] The rotary dry ammonium furnace body 6 is rotated by the transmission device 8.

[0040] The furnace body is installed at an angle, with a rolling ring and a large gear ring fixed on it, and support rollers and stop rollers at the bottom for support and positioning.

[0041] To better understand this utility model, the working principle of this utility model will be described in detail below:

[0042] Part of the dried material is discharged to the discharge hood at the tail of the furnace, then passes through the return material airlock unloader 11 and enters the scraper conveyor 14 and bucket elevator 15, before being transported to the external premixer 13 for thorough premixing with wet ammonium. The other part of the dried material is transported through the finished product output pipe 7 wound around the furnace body to the finished product discharge hood 4 at the furnace head, and then through the finished product airlock unloader 12 to the finished product warehouse for packaging. The finished product quantity can be adjusted by the regulating valve 9 on the spiral pipe.

[0043] After the high-temperature return material and wet ammonium are fully premixed by the external premixer 13, they enter the furnace head through the feed screw 1 and are dried at low temperature through the steam tube bundle. In order to reduce the humidity of the furnace gas, an appropriate amount of moisture-carrying gas needs to be introduced into the furnace. The moisture-carrying gas and the material can be in a co-current or counter-current manner. Figure 1 The diagram shows a co-current flow method. An air inlet hood 2 is installed outside the feed screw 1 at the furnace head end. It carries moisture and mixes it with the furnace gas, and then quickly discharges it from the furnace gas outlet above the discharge hood at the furnace tail end.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-cooled steam-heated rotary dry ammonium furnace, characterized in that, include: Rotary dry ammonium furnace body (6); The finished product output pipe (7) is set on the rotary dry ammonium furnace body (6), and is connected from the tail of the rotary dry ammonium furnace body (6) to the head of the rotary dry ammonium furnace body (6) to transport the finished product to the finished product unloading device. The return material device is located at the tail of the rotary dry ammonium furnace (6); The premixer (13) premixes the return material conveyed by the return device with the input material and then transfers it to the furnace head of the rotary dry ammonium furnace body (6).

2. The self-cooled steam-heated rotary dry ammonium furnace according to claim 1, characterized in that, The finished product output pipe (7) is a spiral pipe.

3. The self-cooled steam-heated rotary dry ammonium furnace according to claim 1, characterized in that, A regulating valve (9) is provided on the finished product output pipe (7).

4. A self-cooled steam-heated rotary dry ammonium furnace according to any one of claims 1-3, characterized in that, The finished product unloading device includes a finished product discharge hood (4) and a finished product airlock unloader (12). The finished product discharge hood (4) is set outside the furnace head of the rotary dry ammonium furnace body (6), and the finished product airlock unloader (12) is set on the finished product discharge hood (4).

5. A self-cooled steam-heated rotary dry ammonium furnace according to claim 1, characterized in that, The return material device includes a return material discharge hood (10), a return material airlock unloader (11), a scraper conveyor (14), and a bucket elevator (15). The return material discharge hood (10) is provided at the tail of the rotary dry ammonium furnace body (6). The return material airlock unloader (11) is installed on the return material discharge hood (10). The discharge end of the return material airlock unloader (11) is provided with a scraper conveyor (14). The discharge end of the scraper conveyor (14) is provided with a bucket elevator (15). The discharge end of the bucket elevator (15) leads to the premixer (13).

6. A self-cooled steam-heated rotary dry ammonium furnace according to claim 1 or 5, characterized in that, The premixer (13) delivers the material to the burner head of the rotary dry ammonium furnace (6) via the feed screw (1).

7. A self-cooled steam-heated rotary dry ammonium furnace according to claim 6, characterized in that, An air inlet hood (2) is provided outside the feeding screw (1), and a furnace gas outlet is provided on the return material discharge hood (10) at the tail of the rotary dry ammonium furnace body (6).

8. A self-cooled steam-heated rotary dry ammonium furnace according to claim 1, 2, 3 or 5, characterized in that, A feed seal (3) is provided on the feed end of the furnace head of the rotary dry ammonium furnace body (6).

9. A self-cooled steam-heated rotary dry ammonium furnace according to claim 1, 2, 3 or 5, characterized in that, The rotary dry ammonium furnace body (6) is supported by a roller device (5).

10. A self-cooled steam-heated rotary dry ammonium furnace according to claim 1, 2, 3 or 5, characterized in that, The rotary dry ammonium furnace body (6) is rotated by a transmission device (8).

Images