RU2021560C1 - Method of elimination of solid fuel charge - Google Patents

Abstract

FIELD: elimination of rocket weapons. SUBSTANCE: charge with the case is set so that the opening, through which combustion products issue, would be upward directed. The opening is filled with liquid coolant for cutting-off the largest part of its burning surface. In burning the coolant is fed into the combustion chamber for control of combustion. Pressure within the combustion chamber is maintained at a low level to provide explosion-proof as much as possible. For decreasing evaporation a shield that decreases heat supply from combustion products is mounted above surface of the coolant. For enhancing retardation of combustion surface that is submerged into the coolant the surface undergoes ultrasonic radiation before burning. As a coolant water or neutralizing solutions of soda and alkali are used. EFFECT: enhanced safety. 7 cl, 1 dwg

Description

 The invention relates to methods for eliminating charges of solid rocket fuel (TPT) by combustion, mainly to methods for burning channel charges of TPT directly in the bodies of rocket engines.

 There is a known method of eliminating the charges of mts by the combustion method [1], which consists in burning the charge from the housing in open areas. At the same time, the combustion products of the solid fuel flow freely from the body and dissipate in the atmosphere.

 The disadvantage of this method is the infliction of great environmental damage, the need for significant land allocation for the organization of combustion sites.

 A known method of burning bulky charges on a stand with subsequent cooling of the combustion products with water beyond the nozzle exit, localizing them in a large tank (130 thousand cubic meters) and neutralizing them. The release of purified gases into the atmosphere occurs through a gas duct with a cross section of 3.7 square meters and a length of 60 m [2].

The disadvantages of this method are the intensive consumption of combustion products (20-1000 kg /), high heat (1x10 ⁸ ... 5x10 ⁹ J / kg) and high temperatures during the burning of large items. To cool the combustion products per kilogram of fuel, about 10 kg of refrigerant is required, which must be supplied under a pressure of at least 1 MPa.

 An object of the invention is the creation of an adjustable method of burning charges of solid fuel, allowing the use of stands of low power, equipped with cleaning plants, and safely burn large charges, including defective ones.

 The problem is solved in that the charge in the housing with holes is set one of the holes up, fill the free volume in the housing with refrigerant and set on fire. If this hole is a nozzle, then the nozzle block is removed, leaving a wider pole hole.

 To regulate the amount of refrigerant in the housing, it is supplied to the housing. The free surface of the refrigerant in the housing is limited by a screen.

 The surface of the charge before combustion is exposed to ultrasonic radiation through a refrigerant medium.

 The refrigerant used is water, or an alkaline solution, or a soda solution.

 The drawing shows the application of this method in an industrial technological system for the elimination of charges of solid fuel, where 1 is the charge in the housing, 2 is the cooling system of the combustion products 3 is the gas purification system, 4 is the water tank, 5 is the refrigerant regulator, 6 is the purification system water. The housing is installed open upstream of the products of combustion, with the opening upward to allow filling with liquid refrigerant. The latter acts as a shutter for hot combustion products, cutting off the combustion surface from the rest of the charge. The free volume of the housing is filled with refrigerant so that the residual combustion surface after ignition does not give the arrival of combustion products more than the performance of the used cleaning unit. The optimal filling option is 85-90% of the initial combustion surface, which ensures reliable ignition of the charge. In the case of liquid refrigerant, in order to reduce the evaporation rate, the free surface of the refrigerant is limited to a liquid or solid screen. In the process of burning the refrigerant is also fed into the combustion chamber to control the thermodynamic parameters of combustion. The pressure in the combustion chamber is maintained at a level that provides the highest possible explosion safety (about 0.1-0.2 MPa). This is important when burning defective charges, as the probability of an explosion at low pressures becomes almost zero. Regulation of the level of the refrigerant and, accordingly, the area of the burning surface allows you to programmatically burn complex charges. As a result of applying this method of elimination, it is possible to control the combustion process and even quench the charge with its subsequent burning. At the same time, the second consumption of combustion products is reduced by 10-15 times in comparison with the prototype. By reducing the flow rate of the combustion products, the flow rate of the cooling liquid, energy capacity, and thermal loads on the walls of the cleaning devices are reduced.

 When exposed to high temperatures, the refrigerant in the chamber evaporates quickly, and therefore the combustion surface is exposed quite quickly. To prevent ignition, it is exposed to ultrasonic radiation through a liquid refrigerant medium before burning.

 The most optimal radiation parameters: frequency 22 Hz, exposure time 2-5 minutes. In this case, the combustion surface is phlegmatized and does not ignite on the exposed area until it is filled with the refrigerant supplied to the chamber. Experimental tests showed that the exposure time of radiation should not exceed 5 minutes, because further exposure does not increase the effect of phlegmetization.

 To verify the proposed method, an experiment was conducted to burn a defective charge of mixed solid rocket fuel weighing 3.5 tons. The charge channel was filled with water. When burning this charge, the burning time increased 4 times, the consumption of combustion products amounted to about 5 kg / s. The obtained results confirmed the possibility of regulating the combustion parameters of the charge of solid fuel and ensuring a given flow rate of combustion products.

 The method can be industrially used in the elimination of charges of solid rocket fuel, including defective, waste production of TRT. When using a straight-through high-speed absorber with a gas productivity of 130,000 cubic meters per hour as a cleaning system, charges weighing up to 100 tons with a purification degree of 99.9% can be environmentally clean.

Claims (7)

 1. METHOD FOR LIQUIDATION OF A SOLID ROCKET FUEL CHARGE placed in a housing with holes, which consists in burning a charge of TPT in the housing, characterized in that before burning, the housing is installed with the charge of one of the holes up and the free volume in the housing is filled with refrigerant.  2. The method according to claim 1, characterized in that the refrigerant is fed into the housing and its amount is regulated during the combustion process.  3. The method according to claims 1 and 2, characterized in that they limit the free surface of the refrigerant in the housing.  4. The method according to claims 1 to 3, characterized in that the surface of the charge before burning is exposed to ultrasonic radiation through a refrigerant medium.  5. The method according to claims 1 to 4, characterized in that water is used as a refrigerant.  6. The method according to claims 1 to 4, characterized in that an alkaline solution is used as the refrigerant.  7. The method according to claims 1 to 4, characterized in that soda solution is used as the refrigerant.

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