A valve for preventing crystallization of raw coal gas

Abstract

The application provides a valve special for preventing crude coal gas crystallization, which comprises a valve body, a flange connecting pipe, a valve rod, a valve core, a handle, a valve rod nut and a gas guide pipe; the bottom of the valve body is bolted with the flange connecting pipe; a first heating cavity is additionally arranged outside the cavity in the valve body; a second heating cavity is additionally arranged in the flange connecting pipe; two first flanges are fixed on the valve body and communicate with the first heating cavity; two second flanges are fixed on the flange connecting pipe and communicate with the second heating cavity; and the gas guide pipe is connected between the first flange and the second flange on one side; the valve is heated by steam, and a plurality of valves with equal intervals are simultaneously installed on the pipeline conveying the crude coal gas according to the actual situation, so that the crude coal gas is heated by the steam, the conveying distance of the crude coal gas is prolonged, the pipeline is prevented from being blocked by crystallization of ammonium bicarbonate (NH4HCO3), and the maintenance cost is reduced, thereby ensuring the normal operation of production.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and specifically to a valve specifically designed to prevent the crystallization of crude coal gas. Background Technology

[0002] The BGL gasifier is a pressurized moving bed gasification technology that uses lump coal or coke as raw material and oxygen and steam as gasifying agents to produce crude coal gas under high temperature and high pressure conditions.

[0003] The current problem is that the crude coal gas is transported through pipelines, and the temperature gradually decreases as the pipelines extend. Because the crude coal gas contains NH3, H2O, and CO2, when the temperature is below 70℃, the three react to form ammonium carbonate (NH4HCO3) and crystallize out, causing valve blockage and affecting the normal operation of production. Summary of the Invention

[0004] The purpose of this invention is to provide a special valve for preventing the crystallization of crude coal gas.

[0005] This invention is implemented by the following technical solution: A special valve for preventing the crystallization of crude coal gas includes a valve body, a flange connecting pipe, a valve stem, a valve core, a handle, a valve stem nut, and a gas guide pipe. The valve body has a cavity. One side of the valve body has an inclined inlet hole communicating with the cavity. The bottom of the valve body has an outlet hole communicating with the cavity. The bottom of the valve body is bolted to the flange connecting pipe. A valve stem is vertically slidably mounted on the valve body. The bottom end of the valve stem is fixed to the valve core, which is movably positioned within the cavity. The top end of the valve stem protrudes from the valve body and is fixed to a handle. A valve stem nut is fixed to the top of the valve body. The valve stem and valve stem nut are threaded together. A first heating chamber is also provided outside the cavity within the valve body. A second heating chamber is provided within the flange connecting pipe. Two first flanges are fixed to the valve body and communicate with the first heating chamber. Two second flanges are fixed to the flange connecting pipe and communicate with the second heating chamber. A gas guide pipe connects one of the first flanges and the second flange on one side.

[0006] Preferably, a third flange is fixedly connected to one side of the valve body located at the feed port.

[0007] Preferably, the discharge hole is fixedly fitted with a valve seat, and the valve core and the valve seat are movably and sealingly inserted.

[0008] The advantages of this invention are: by using steam to heat the inside of the valve, and by installing multiple equally spaced valves on the pipeline for transporting crude coal gas according to actual conditions, the crude coal gas passing through the valve is heated by steam, thereby extending the transport distance of the crude coal gas and ensuring that ammonium bicarbonate (NH4HCO3) crystallization does not cause blockage in the pipeline, thus reducing maintenance costs and ensuring normal production operation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 for Figure 3 Sectional view at point BB.

[0010] In the diagram: 1. Valve body, 1.1. Cavity, 1.2. Feed port, 1.3. Discharge port, 1.4. First heating chamber, 1.5. First flange, 1.6. Third flange, 2. Flange connecting pipe, 2.1. Second heating chamber, 2.2. Second flange, 3. Valve stem, 4. Valve core, 5. Handle, 6. Valve stem nut, 7. Air guide pipe, 8. Valve seat. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] like Figures 1 to 4 As shown, a special valve for preventing the crystallization of crude coal gas includes a valve body 1, a flange connecting pipe 2, a valve stem 3, a valve core 4, a handle 5, a valve stem nut 6, and a gas guide pipe 7. The valve body 1 has a cavity 1.1 inside. A feed hole 1.2 communicating with the cavity 1.1 is obliquely opened on one side of the valve body 1. A third flange 1.6 is fixedly connected to the side of the valve body 1 at the feed hole 1.2. A discharge hole 1.3 communicating with the cavity 1.1 is opened at the bottom of the valve body 1. A valve seat 8 is fixedly fitted onto the discharge hole 1.3. The valve core 4 and the valve seat 8 are movably and sealingly inserted. The flange connecting pipe 2 is bolted to the bottom of the valve body 1. A valve stem 3 is vertically slidably mounted on the valve body 1. The valve core 4 is fixed to the bottom end of the valve stem 3 and movably placed within the cavity 1.1. The top end of the valve stem 3 protrudes from the valve body 1 and is fixedly attached to the handle 5. A valve stem nut 6 is fixed to the top of the valve body 1. The valve stem 3 and the valve stem nut 6 are threadedly connected.

[0013] To prevent valve blockage, a first heating chamber 1.4 is provided outside the cavity 1.1 inside the valve body 1, and a second heating chamber 2.1 is provided inside the flange connecting pipe 2. Two first flanges 1.5 are fixed on the valve body 1 and communicate with the first heating chamber 1.4, and two second flanges 2.2 are fixed on the flange connecting pipe 2 and communicate with the second heating chamber 2.1. A gas guide pipe 7 is connected between the first flange 1.5 and the second flange 2.2 on one side. High-temperature steam is introduced into the heating chamber to prevent the temperature of the crude gas entering the valve from dropping, thereby avoiding the formation of ammonium bicarbonate (NH4HCO3) and its crystallization.

[0014] The working principle is as follows: connect the first flange 1.5 on the other side to the steam outlet in the steam system so that high-temperature steam can enter the first heating chamber 1.4 and the second heating chamber 2.1. Connect the second flange 2.2 on the other side to the steam inlet pipe of other systems so that the steam can be effectively utilized and waste can be prevented.

[0015] Since the crude coal gas is transported through pipelines, the temperature gradually decreases as the pipeline extends. Steam is used to heat the valves, and multiple equally spaced valves are installed on the pipelines transporting the crude coal gas. This allows the crude coal gas to be heated by steam after passing through these valves, thereby extending the transport distance of the crude coal gas and ensuring that ammonium bicarbonate (NH4HCO3) crystals do not cause blockage in the pipeline. This reduces maintenance costs and ensures normal production operations.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A valve for preventing crystallization of raw coal gas, characterized by, The valve body (1) includes a valve body (1), a flange connecting pipe (2), a valve stem (3), a valve core (4), a handle (5), a valve stem nut (6), and an air guide pipe (7). The valve body (1) has a cavity (1.1) inside. A feed hole (1.2) communicating with the cavity (1.1) is obliquely opened on one side of the valve body (1). A discharge hole (1.3) communicating with the cavity (1.1) is opened at the bottom of the valve body (1). The flange connecting pipe (2) is bolted to the bottom of the valve body (1). A valve stem (3) is vertically slidably mounted on the valve body (1). A valve core (4) is fixed to the bottom end of the valve stem (3). The valve core (4) is movably positioned within the cavity (1.1). The top end of the valve stem (3)... A handle (5) is fixed to the valve body (1). A valve stem nut (6) is fixed to the top of the valve body (1). The valve stem (3) and the valve stem nut (6) are threaded together. A first heating chamber (1.4) is also provided on the outside of the cavity (1.1) inside the valve body (1). A second heating chamber (2.1) is provided inside the flange connecting pipe (2). Two first flanges (1.5) are fixed on the valve body (1) and communicate with the first heating chamber (1.4). Two second flanges (2.2) are fixed on the flange connecting pipe (2) and communicate with the second heating chamber (2.1). A gas guide pipe (7) is connected between the first flange (1.5) and the second flange (2.2) on one side.

2. A valve for preventing crystallization of raw coal gas according to claim 1, characterized in that, The valve body (1) is fixedly connected to a third flange (1.6) on one side of the feed hole (1.2).

3. The valve for preventing crystallization of the raw coal gas according to claim 1, wherein The discharge hole (1.3) is fixedly fitted with a valve seat (8), and the valve core (4) and the valve seat (8) are movably and sealingly connected.

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